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Patent Abstract
A dual wheel foldable hand truck with a nose plate has a skeletal
frame including laterally spaced vertical side rails. The frame
has hingedly connected upper and lower frame sections with upper
and lower side rails meeting at side rail interfaces. Handle operated
lock slides are carried by the upper rail sections for downward
sliding movement to releasably lock the frame sections in planar
alignment. The foldable nose automatically locks in operative position
when swung down from stowed position.
Patent Claims
I claim:
1. A hand truck comprising: a. a skeletal generally vertically
disposed frame including side rails with front and rear sides, exterior
sides, and interior sides connected by generally laterally extending
braces, said frame having separated upper and lower frame sections
with upper and lower side rail sections meeting at side rail interfaces;
b. a pair of wheels connected to said lower frame section rearwardly
of said lower side rail sections; c. a load support nose member
connected to said lower frame section having an operative position
extending generally horizontally forwardly from said lower frame
section; d. hinges connecting said upper frame section to said lower
frame section for relative folding movement from a first operative
position in which said upper and lower side rail sections are generally
vertically aligned to a folded-down stowed position in which said
side rail sections are in front to rear lapping relationship; e.
handle operated lock slides carried by said upper rail sections
for downward locking vertical sliding movement within said upper
side rail sections from a first raised position vertically free
of said lower rail sections to a second locking position extending
past said interfaces into the upper ends of said lower rail sections
to prevent relative folding movement of said upper and lower side
rail sections; and f. stop surfaces carried by said lock slides
interacting with said frame for limiting the downward, gravity assisted
locking travel of said lock slides beyond said locking position.
2. The hand truck of claim 1 wherein said stop surfaces interact
with said upper frame section.
3. The hand truck of claim 2 wherein said upper frame section includes
support guide plates secured to bridge said upper side rail section
interior sides which are open, said guide plates having vertical
guide slots therein defining said guide surfaces for said lock slides
and having lower ends defining locking stop surfaces for said slides,
said slides being disposed laterally outwardly of said support guide
plates within said side rails and having guides extending into said
slot guide surfaces on said guide plates.
4. The hand truck of claim 3 wherein guides on said lock slides
in each upper side rail section extend laterally inwardly through
said slots and are connected by a laterally extending handle disposed
laterally between said upper side rail sections.
5. The hand truck of claim 4 wherein said lock slides have vertically
extending slide slots therein and fasteners for securing said guide
plate to said rail sections extend through said lock slide slots
and further guide said lock slides in their sliding movement.
6. The hand truck of claim 1 wherein said hinges have lateral hinge
pins rearward of said upper side rail sections, each connecting
a hinge member secured to the exterior side of said upper side rail
section and a hinge member secured to the exterior side of said
lower side rail section, said upper section of said frame folds
down rearwardly to lie rearwardly of said lower section of said
frame, and said nose plate is pivotally mounted at the lower ends
of said lower frame section side rails to swing upwardly to a stowed
position adjacent the front sides of said lower frame section side
rails from an operative forwardly extending position.
7. The hand truck of claim 6 wherein said nose member comprises
a load support member with an angularly extending back plate, lock
bracket mechanism is carried on the nose support member back plate
and has forwardly facing access openings leading rearwardly to a
nose locking slot which extends downwardly when said nose member
is in operative position, and said lower frame section carries a
laterally extending nose lock part movable from a locked position
within said nose locking slot on the nose member to a raised position
above said slot permitting said nose plate to swing forwardly out
away from under said lock part in folding to stowed position.
8. The hand truck of claim 7 wherein said nose lock part comprises
a laterally extending rod, brackets with vertically extending slots
mount on said interior sides of said lower frame section side rails
near the lower ends thereof, and the ends of said rods extend through
said slots and are rideable vertically therein.
9. The hand truck of claim 8 wherein said access openings have
piloting surfaces leading to said nose locking slots positioned
to engage said nose locking rod when said nose member is swung down
from stowed to operative position and move said rod to a position
in which it is automatically deposited in said nose locking slot
carried on the nose member and locks said nose member in generally
horizontal operative position.
10. A hand truck comprising: a. a generally vertically disposed
frame including laterally spaced side rails with front and rear
sides, exterior sides, and interior sides connected by generally
laterally extending braces; b. a pair of wheels connected to carry
said side rails; c. a load support nose member connected to the
lower end of said frame having an operative position extending generally
horizontally forwardly from said frame; d. pivots mounting said
nose member for upward swinging movement from said operative position
to a vertical position substantially folded against said front sides
of said side rails; e. a backer member for said nose member extending
generally angularly thereto; and f. manually releasable interactive
latch and slot lock mechanism carried on said backer member and
the lower ends of said side rails engaged when said nose member
is swung down from stowed position to operative position to automatically
lock said nose member in operative position.
11. The hand truck of claim 10 wherein said nose member comprises
a load support part with a perpendicularly extending back plate
constituting said backer member, and said lock mechanism includes
a lock bracket mechanism carried on the nose support member back
plate having openings leading rearwardly to a nose locking slot
which extends downwardly when said nose member is in operative position,
and said lower frame section carries a laterally extending nose
lock rod constituting said latch movable from a locked position
within said nose locking slot to a raised position above said slot
permitting said lock bracket mechanism to swing forwardly out away
from under said rod when said nose member is swung to stowed position.
12. The hand truck of claim 11 wherein brackets with vertically
extending slots mount on said interior sides of said side rails,
and the ends of said rod extend through said slots and are rideable
vertically therein.
13. The hand truck of claim 10 wherein openings provided as part
of said lock mechanism have piloting surfaces leading to nose locking
slots positioned to engage a nose locking rod constituting said
latch when said nose member is swung down from stowed to operative
position and automatically move said rod to a position in which
it is deposited in said nose locking slots and locks said nose member
in generally horizontal operative position.
14. A hand truck comprising: a. a skeletal, generally vertically
disposed frame including channel side rails with front and rear
sides, exterior sides, and open interior sides connected by generally
laterally extending braces, said frame having separated upper and
lower frame sections with upper and lower side rail sections meeting
at laterally aligned hinging interfaces; b. a pair of wheels connected
to said lower frame section to lie rearwardly of said lower side
rail section; c. a load support nose member connected to said lower
frame section having an operative position extending generally horizontally
forwardly from said lower frame section; d. pivots mounting said
nose member for upward swinging movement from said operative position
to a vertical position substantially folded against said front sides
of said lower frame section side rails; e. a back plate for said
nose member extending generally perpendicularly thereto; f. manually
releasable interactive slot and rod lock mechanism carried on said
back plate and lower side rail sections respectively automatically
engaged when said nose member is swung down from stowed position
to operative position to lock said nose member in operative position;
g. lock bracket mechanism carried on the nose support member back
plate having at least one forwardly facing access opening leading
rearwardly to a nose locking slot which extends downwardly when
said nose member is in operative position, and said lower frame
section carries a laterally extending nose lock rod movable from
a locked position within said nose locking slot on the nose member
to a raised position above said slot permitting said nose bracket
mechanism to swing forwardly out away from under said rod as said
nose plate is folding to stowed position; h. hinges connecting said
upper frame section from a first operative position in which said
upper and lower frame sections are vertically aligned to a folded-down
stowed position in which said upper frame section is behind said
lower frame section; and i. lock slides within said upper side rail
section connected with a handle rod extending generally laterally
between said upper side rail sections and carried for movement from
a first raised position vertically free of said lower rail sections
to a second vertically defined lower locking position downwardly
beyond said interfaces to prevent relative folding movement of said
upper and lower rail sections.
15. The hand truck of claim 14 wherein brackets with generally
vertically extending slots mount on said interior sides of said
channel shaped lower frame section side rails near the lower ends
thereof, and the ends of said rod extend through said slots and
are rideable vertically therein, and wherein said access opening
has a piloting surface leading to said nose locking slot positioned
to engage said locking rod when said nose member is swung down from
stowed to operative position and automatically move said rod to
a position in which it is deposited in said nose locking slot on
the nose member and locks said nose member in generally horizontal
operative position.
16. In a hand truck having a skeletal generally vertically disposed
frame including channel side rails with front and rear sides, exterior
sides, and open interior sides connected by generally laterally
extending braces, said frame having separated upper and lower sections
with upper and lower side rail sections meeting at laterally aligned
interfaces, the improvement comprising: a. hinging devices carried
on said side rail sections and connecting said rail sections for
relative hinging movement from a first generally vertically aligned
operative position to a folded down stowed position in which said
frame sections are in front to rear lapping relationship; b. support
guide plates spanning and fixed to said open laterally interior
sides of said channel side rails, and having elongate vertical guide
slots therein providing vertical guide surfaces; and c. rigid, non-hinged
lock parts for said upper and lower frame sections carried within
said side rail channels and having laterally inwardly projecting
parts movable in engagement with said guide surfaces on said guide
plates from a position removed from said interface to a projected
position spanning said interface and blocking said relative hinging
movement of said upper and lower rail sections.
17. The hand truck of claim 16 wherein said hinging devices mount
said upper frame section for folding movement to a position rearward
of said lower frame section.
18. A method of operating a hand truck including a skeletal generally
vertically disposed frame including channel side rails with front
and rear sides, exterior sides, and open interior sides connected
by generally laterally extending braces, said frame having separated
upper and lower frame sections with upper and lower side rail sections
meeting at laterally aligned interfaces; a pair of wheels connected
to said lower frame rearwardly of said lower side sections; a load
support nose member connected to said lower frame having an operative
position extending generally horizontally forwardly from said lower
frame; hinges connecting said upper frame section to said lower
frame section for relative folding movement from a first operative
position in which said upper and lower rail sections are generally
vertically aligned in planar relationship to a folded down stowed
position in which said sections are in front to rear lapping relationship;
handle operated lock slides carried by said upper rail sections
for downward vertical sliding movement within said upper rail sections
from a first raised position vertically free of said lower rail
sections to a second locking position extending past said interfaces
into the upper ends of said lower rail sections to prevent relative
folding movement of said upper and lower rail sections; and stop
surfaces carried by said lock slides interacting with said frame
for limiting the downward gravity assisted locking travel of said
lock slides, comprising: a. when said hand truck is in folded-down
condition with said upper frame section adjacent and rearward of
said lower frame section, swinging said upper frame section upwardly
and forwardly to a position in planar alignment with said lower
frame section; and b. moving said lock slides downwardly from a
position wholly within said upper frame side rail sections to enter
said lower frame side rail sections and proceed to a stop surface-defined
locking position.
19. A method of constructing a hand truck having a skeletal generally
vertically disposed frame including side rails with front and rear
sides, exterior sides, and interior sides connected by generally
laterally extending braces, said frame having separated upper and
lower frame sections with upper and lower side rail sections meeting
at side rail interfaces; a pair of wheels connected to said lower
frame section rearwardly of said lower side rail sections; a load
support nose member connected to said lower frame section having
an operative position extending generally horizontally forwardly
from said lower frame section; hinges connecting said upper frame
section to said lower frame section for relative folding movement
from a first operative position in which said upper and lower side
rail sections are generally vertically aligned to a folded-down
stowed position in which said side rail sections are in front to
rear lapping relationship; comprising: a. providing handle operated
lock slides carried by said upper rail sections for downward locking
vertical sliding movement within said upper side rail sections from
a first raised position vertically free of said lower rail sections
to a second locking position extending past said interfaces into
the upper ends of said lower rail sections to prevent relative folding
movement of said upper and lower side rail sections; and b. providing
stop surfaces carried by said lock slides interacting with said
frame for limiting the downward, gravity-assisted locking travel
of said lock slides beyond said locking position.
20. A method of constructing a hand truck comprising a generally
vertically disposed frame including laterally connected laterally
spaced side rails with front and rear sides, exterior sides, and
interior sides; a pair of wheels connected to carry said side rails;
a load support nose member connected to the lower end of said frame
having an operative position extending generally horizontally forwardly
from said frame; pivots mounting said nose member for upward swinging
movement from said operative position to a vertical stowed position
substantially folded against said front sides of said side rails;
and a back for said nose member extending generally angularly thereto;
comprising a. providing a manually releasable interactive latch
and slot lock mechanism carried on said back and on the lower ends
of said side rails to interact when said nose member is swung down
from stowed position to operative position and automatically lock
said nose member in operative position.
Patent Description
[0001] This application claims the priority of U.S. provisional
application Serial No. 60/218,704, filed Jul. 17, 2000. The present
application relates to hand trucks of the type employing a vertically
extending skeletal frame and a forwardly extending nose plate upon
which myriad and varied products may be supported for ready transport.
Hand trucks of this character are characterized by providing a pair
of wheels on a dead axle at the lower end of the frame rearwardly
of the nose plate.
BACKGROUND OF THE INVENTION
[0002] Hand trucks of the type mentioned have been well described
in a number of prior patents such as the present assignee's U.S.
Pat. Nos. 3,997,182, 4,563,014, 4,790,547, and 5,393,081, for example,
all of which I incorporate herein by reference. Such hand trucks
are utilized for moving a variety of products such as stacked cases
of soft drinks or beer to and from a delivery truck for transporting
them from warehouses to retail establishments, for example. Typically,
the hand trucks will be stored in the delivery vehicle during transport
and then put into use when the various destinations are reached.
SUMMARY OF THE INVENTION
[0003] The present invention is concerned with a vertically folding
hand truck comprising upper and lower sections which are hingedly
connected to permit the upper section to be folded vertically down
to a position of vertical adjacency with the lower section. This
is accomplished in the present hand truck without the sacrifice
of strength and rigidity when the hand truck is in use by employing
an internal locking mechanism disposed within the frame side rails
for securely locking the sections in vertically co-extensive position.
Mechanism is also provided for pivotally mounting the nose plate
for movement to a vertical position and securely and rigidly locking
it in the horizontal position of use automatically when the nose
plate is swung down from the stowed position.
[0004] One of the prime objects of the present invention is to
provide a hand truck of the character described which has relatively
few operating parts and can be manufactured and marketed economically.
[0005] Another object of the invention is to provide a lightweight
foldable hand truck of very durable construction which requires
virtually no maintenance and can be readily and easily locked in
operative position.
[0006] A still further object of the invention is to provide a
foldable hand truck having parts which can be readily unlocked to
enable the truck to assume a compacted position for ready storage.
[0007] Other objects and advantages of the invention will become
apparent with reference to the accompanying drawings and descriptive
matter.
BRIEF DESCRIPTION OF THE DRAWINGS
[0008] The presently preferred embodiment of the invention is disclosed
in the following description and in the accompanying drawings, wherein:
[0009] FIG. 1 is a front elevational view of the hand truck shown
in its operative position, certain parts being omitted in the interest
of clarity;
[0010] FIG. 2 is a side elevational view thereof;
[0011] FIG. 3 is a slightly enlarged side elevational view showing
the hand truck in folded position ready for compact storage;
[0012] FIG. 4 is a slightly enlarged front elevational view of
the two-part frame only in vertically aligned position, the hinge
uniting the two-frame sections being shown in removed position at
one side of the frame;
[0013] FIG. 4A is an enlarged fragmentary sectional front elevational
view of a portion of the frame illustrated in FIG. 4;
[0014] FIG. 5 is an exterior side elevational view thereof;
[0015] FIG. 6 is an enlarged end elevational view of the side rails
in both the upper and lower frame sections;
[0016] FIG. 7 is an enlarged side elevational view of a typical
hinge, illustrating its structure and showing it in the position
of extension;
[0017] FIG. 8 is a similar view showing the folded position of
the hinge;
[0018] FIG. 9 is an enlarged face elevational view of one of the
slide support extrusions fixed on each interior side of the upper
frame side rails;
[0019] FIG. 10 is an edge elevational view thereof;
[0020] FIG. 11 is an end elevational view of the extrusion depicted
in FIG. 10;
[0021] FIG. 12 is an enlarged face elevational view of one of the
lock slides which are carried for vertical movement within the support
extrusions;
[0022] FIG. 13 is an end elevational view thereof;
[0023] FIG. 14 is an enlarged front elevational view of one of
the folding nose mounting brackets;
[0024] FIG. 15 is a side elevational view thereof;
[0025] FIG. 16 is an end elevational view thereof; and
[0026] FIG. 17 is a face elevational view of one of the mount brackets
fixed to the lower ends of the lower frame section side rails to
pivotally support the nose plate.
DETAILED DESCRIPTION OF THE DRAWINGS
[0027] Referring now more particularly to the drawings mentioned,
the hand truck is shown as comprising preferably rubber-tired wheels,
generally designated 10, which may comprise laterally spaced apart
tires 11 mounted on rims 12 having flanged central hub portions
12a, supporting bearing sleeves 13, within which are bearings rotatably
supporting the wheels 10 for travel on dead axle 15.
[0028] The axle 15 fixedly carries brackets 16 which secure to
the lower end of a generally rectangular, load carrying, main frame,
generally designated 17, which comprises a two-piece generally rectangular
skeletal structure mounting a handle H at its upper end. As will
become apparent, the overall frame 17 comprises a normally co-extensive
upper frame portion 17a and a lower frame portion 17b abutting at
and interface "x", and it is to the lower frame 17b that
the brackets 16 are mounted. It is also to the lower frame section
17b that the foldable load supporting load support member or nose
18 is pivotally connected in a manner which will presently be more
specifically described.
[0029] The upper frame section 17a includes generally channel-shaped
side rail sections generally designated 19 with the open channels
C of the sections facing laterally inwardly to receive the ends
of a brace member 20, which is secured in position by suitable fasteners
20a. The lower ends of handle H are also received within the channel
members 19 and may be secured by fasteners 21. Also provided for
the upper ends of the side rails 19 are plastic guard fittings 22
which may be held in position by the fasteners 21. It will be noted
that the front faces of the channel members 19 are shallowly grooved
as at 23 and that the grooved or recessed portions 23 are bordered
by vertical lip portions 24. The upper frame section 17a is hingedly
connected to the lower frame section 17b by hinge members, generally
designated 25, which will presently be described.
[0030] It will be seen that the lower frame section 17b comprises
a like pair of channel-shaped side rails generally designated 26
which similarly are disposed in laterally opposed disposition with
their channels C facing inwardly to receive brace members 27 and
28, which may be secured by fasteners 29 and 30, respectively. As
FIGS. 4, 7 and 8 illustrate, each of the hinges 25, which may be
referenced as left-hand hinges and right-hand hinges, include a
pair of hinge legs 31 and 32, pivotally secured together by a suitable
pin 33. The hinge legs 31, which are received in the side rail recesses
23, may be secured in the recesses 23 by fasteners 34 and the hinge
legs 32, received within the like exterior recesses 35 provided
in the side rails 26 which are bordered by vertically extending
lips 36, may be secured by fasteners 37.
[0031] Fixed to the inner side of each of the side rails 19 of
the upper frame section 17a are support extrusions (see FIGS. 9-11),
generally designated 39, which may be secured by fasteners 40 extending
through openings 40a to side rails 19. As FIG. 11 well indicates,
the members 39 comprise sidewisely disposed webs 41 having elongate
guide slots 42 with lower stop surfaces 42a. Side ribs 43 engage
the edges of the front and rear walls of the side rails 19 to brace
the extrusion members 39 in position. Mounted sidewisely behind
the support extrusions 39 are U-shaped lock slide members or parts
44 (see FIGS. 12 and 13) having slots 45 in walls 45a facing the
slots 42 in the extrusion members 39. The slots 45 receive the lower
fastener pins 40 provided for securing the lower end of support
extrusions 39 in fixed position to each side rail 19 and are guided
thereby when the lock slides 44 are moved upwardly and downwardly.
Upward movement of the slides 44 may be limited by the slots 42
or 45.
[0032] Provided as a frame spanning handle to move the lock slides
44 upwardly and downwardly in unison is a rod member 46 which has
end pins 47 with shank portions 47a fixed in openings 46a in the
slides 44 and riding in the support extrusion guide slots 42. When
the lock slides 44 are in their lowermost position as indicated
in FIGS. 4 and 4A, they are received within the upper ends of the
side rails 26 of the lower frame section 17b and prevent the upper
frame section 17a from being pivoted downwardly relative to the
lower section 17b to the position shown in FIG. 3.
[0033] It will be seen that the nose plate or member 18 has an
integral back plate 18a. Mounted to the front face of back plate
18a are a pair of angle shaped lock brackets, generally designated
18b in FIGS. 14-16. The brackets 18b each include a base portion
18c which rigidly secures to the back plate 18a, as with fasteners
48, in a position to leave each locking wall 49 extending forwardly
when the nose plate 18 extends forwardly. As FIG. 15 particularly
shows, each wall 49 is provided with a cut-out or recessed portion,
generally designated 50, which includes an access portion formed
by a top lip 50a and an inclined piloting or camming wall 51, leading
to a downwardly extending vertical slot 52. A rod 53 has its ends
captured in the slot 52 in its lowered position, but is freely vertically
raisable to the position shown in chain lines in FIG. 15, which
is free of the slots 52. When the rod 53 is in the lowermost position,
shown in solid lines in FIG. 15, the nose plate 18 is firmly locked
in the operative position. A pivot supporting bracket plate, disclosed
in FIG. 17 and generally indicated at 54, is fixed inside the lower
end of each side rail 26 on its laterally interior side to aid in
journaling the nose plate 15 for swinging movement. Plates 54 include
guide slots 53a within which the ends of locking rod 53 are received.
They may be fixed in position on rails 26 by fasteners 55b. The
plates 54 are disposed within the recesses of channel members 56
secured to each of the side rails 26 and have bores 57 to receive
the nose plate pivot pins 58 which fix to the brackets 18b fixed
to nose plate 18. Belleville washers (not shown) may be suitably
provided on the pins 58 to exert a resilient frictional pressure
between the members 46 and 54 to hold the nose plate in the folded
raised position.
THE OPERATION
[0034] When operative and in use, the nose plate 18 is in the down
position with rod 53 received in the locking slots 52 and maintained
there by gravity. The very ends of the rod 53 can travel freely
upwardly in the slots 53a shown in FIG. 16 when rod 53 is raised.
When it is desired to stow the hand truck in a compacted storage
mode, the nose plate 18 can first he released to pivot upwardly
to a vertical position flush with the side rails 26 by raising the
rod 53 to the chain line position shown in FIG. 15 in which it is
no longer captured in the slots 52. The nose plate 18 is then grasped
by its front horizontally disposed edge and pivoted upwardly and
rearwardly. The back plate 18a and the locking members 18b pivot
rearwardly with the rod 53 removed from the slots 50 so that full
swinging movement of the nose plate 18 to stowed position can be
effected. The spring washers provided on pins or pivot posts 58
hold the nose plate in this vertical position.
[0035] To fold the handle H and upper frame section rearwardly
to the FIG. 3 position, the rod member 46 is raised until the lock
slides 44 are raised to a position within the upper frame section
17a clear of the lower frame section. Because of the rearward position
of hinge pivots 33, handle H can then be swung rearwardly with suitable
clearance to the folded down position shown in FIG. 3. The weight
of the upper section and handle will be sufficient to maintain the
upper frame section 17a in the FIG. 3 position.
[0036] To restore the upper frame section to the FIGS. 1 and 2
position, it is merely necessary to grasp the handle H and fold
the upper frame section up into vertical alignment with the lower
frame section. The locking rod handle 46 can then be moved downwardly
with the aid of gravity to slide the lower ends of the lock slides
44 downwardly into the upper ends of the side rail members 26. The
slides 44 freely move downwardly toward locked position until halted
in locked position by member 47 reaching the lower stop ends of
slots 42 because the locks 45 can travel downwardly relative to
the lower fasteners 40. For rigidity purposes, the rod 46 is moved
to its lowermost position in which substantial lengths of the lock
plates 44 are received and closely confined in the upper ends of
side rails 26. The slots 42 function as elongate vertical guides
for the shanks of pins 47 and the slots 45 do likewise for the lower
fastener pin shanks 40. Both mechanisms may function as guide mechanism
interacting between the upper frame rail section and the lock slides
44. The lower ends of slots 42 also provide and function as stop
surfaces, as indicated.
[0037] To restore the nose plate to operative position, it is merely
necessary to grasp the front edge of the horizontal portion of nose
plate 18 and pivot it downwardly. As the back plate 18a of the nose
plate swings forwardly and upwardly, the inclined camming walls
51 of the brackets 18b engage the ends of rod 53 (carried in slots
53a) to automatically vertically raise the rod 53 to a position
in which its ends are disposed above the slots 52 and can descend
under the influence of gravity in the slots 52 to be captured in
the locked position. The brackets 18b and rod 53 function as interacting
lock mechanism to lock the nose plate 18 in operative position.
[0038] In constructing the present vertically foldable hand truck,
standard hand truck side rail extrusions are utilized and simply
cut in half. The hinge members 25 are then mounted in position along
with the fitting 39 and lock plate 44 sub-assemblies which include
the lock rod 46 fastener members 47 extending through the slots
42. The lower end of the lower frame section 17b is then changed
by adding the lock brackets 18b to nose 18 and the lock rod 53 which
is receivable in the slots 52 provided therein. The members 54 and
56 are, of course, installed first of all.
[0039] It is to be understood that the embodiment described is
exemplary of various forms of the invention only and that the invention
is defined in the appended claims which contemplate various modifications
and embodiments within the spirit and scope of the invention.
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