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Патент USA US3078967

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Feb. 26, 1963
c. o. LARSON
3,078,956
COLLAPSIBLE SAWHORSE BRACKET ASSEMBLY
File-ad April 4, 1962
'
‘
2 Sheets-Sheet 1
'
INVEN TOR.
Charles 0. Larson
BY
WWW/5M,
'
7mm
Feb. 26, 1963
c. o. LARSON
_ 3,078,956
COLLAPSIBLE SAWHORSE BRACKET ASSEMBLY
Filed April 4, 1962 .
2 Sheets-Sheet 2
INVENTOR.
Charles 0. Larson
United States Patent O?tice
3,d78,956
Patented Feb. 26, 1963'
l
2
3,li78,95d
FIG. 1, the parts being shown in the position assumed
when the sawhorse legs are in the folded position there
CSLLAPSIBLE SAWH®R§E ERAQKET ASfl-EMBLY
Charles '8. Larson, dteriing, Elk, assignor to (Chas. U.
Larson 630., Sterling, Jill., a corporation of Illinois
Filed Apr. 4, E62, Ser. No. 135,678
6 ?laims. (Cl. 182-225)
of;
FIG. 3 is an end view similar to FIG. 2 showing the
parts of the sawhorse assembly in the operative posi
tion thereof, wherein the sawhorse legs diverge outward—
ly and downwardly from the crosspiece;
This invention relates to sawhorses, barriers, trestles
FIG. 4 is a further enlarged and exploded view of
and the like, and particularly to improved bracket assem
the parts of two bracket assemblies utilized to secure
blies for making collapsble sawhorses and the like.
10 a pair of sawhorse legs to the sawhorse crosspiece; and
Although sawhorses are fundamentally used for car
PEG. 5 is a fragmentary view of an end of the saw
pentry work, they also ‘are widely used as barriers, ob
horse assembly with the parts in the inverted position
stacius, temporary fences and the like, and many of these
in which they are placed more easily to move the legs
additional uses are temporary in the sense that the saW—
and associated parts from the operative position to the
horses may be used only for a short period of time, such
folded position thereof.
for example, as a temporary barricade along a construc
tion site, after which the sawhorses are either stored or
transported to another place of use. Accordingly, it is
Referring to the drawings, and particularly to FIG. 1,
there is shown a sawhorse, generally designated by the
numeral it), which has been assembled utilizing four
desirable that the sawhorses and particularly the bracket
of the bracket assemblies made in accordance with and
assembly thereof be constructed ‘and adapted to permit 20 embodying the principles of the present invention, the
the legs of the sawhorses to be folded or collapsed be
tween periods of use and during transportation thereof
bracket assemblies having been generally designated by
the numeral 26.
More particularly, the sawhorse 10
so that the sawhorses will occupy the least possible space.
includes four legs 12. arranged in pairs at opposite ends
It furthermore is desirable that the sawhorses be fold
of a crosspiece 14-, the upper ends of the legs 12 con
able or collapsible with a minimum expenditure of energy 25 verging toward each other and toward the adjacent end
and time and also that the sawhorses be again readily
erected when a demand therefor arises.
Upon erec
tion, the sawhorses must be rigid and strong.
Accordingly, it is an important object of the present
invention to provide an improved sawhorse bracket as
sembly which can be quickly assembled to a crosspiece
and an associated pair of converging legs to provide a
sawhorse structure, and which can be easily and quickly
folded or collapsed for transportation and storage there
or.
Another object of the invention is to provide an im
proved sawhorse bracket assembly of the type set forth
wherein the legs of the sawhorse are movable between
of the crosspiece 14. The bracket ‘assemblies 2%) at each
end of the sawhorse 19 are identical, and accordingly,
only one set of parts will be described in detail, like
reference numerals being applied where appropriate to
like parts in the other bracket assemblies.
Each of the sawhorse bracket assemblies 29 includes
a pair of separate, independent and identical brackets 22,
each of the brackets 22 including a main wall 24 which is
substantially ?at and planar, a side ?ange 26 formed
integral therewith and extending the length of the outer
edge thereof, and a top ?ange 28 formed integral with
the main wall 24 and extending the length of the top
edge thereof. More speci?cally, the main plate 24 has‘.
an operative position wherein the legs support an asso
a bottom edge 36 and an inner side edge 32 which are
ciated end of the crosspiece, and a folded or collapsed 40 disposed substantially perpendicular to each other. The
position, wherein the legs are disposed toward each other,
the movement of the legs between the operative posi
tion and the folded position thereof being accomplished
without the use of any tools whatsoever.
Yet another object of the invention is to provide an
improved sawhorse bracket assembly the type set forth
wherein lock mechanism is provided that is operated
under the action of gravity for holding the legs in the
operative position thereof to provide a strong and rigid
sawhorse.
A further object of the invention is to provide an im
proved sawhorse bracket assembly of the type set forth
wherein the ‘legs can be moved between a spread opera—
tive position and a folded collapsed position easily and
quickly, the sawhorse bracket assembly being simple
and economically to manufacture and install.
These and other objects and advantages of the inven
tion will be better understood from the following de
scription when taken in conjunction with the accom
panying drawings. In the drawings, wherein like refer
ence numerals have been utilized to designate like parts
throughout:
FIGURE 1 is a perspective View of a sawhorse con
structed utilizing the bracket assemblies of the present
invention, two of the ‘bracket assemblies being utilized
to secure one set of legs in converging relationship with
side edge 32 terminates at a point approximately halfway
up the main wall 24 and joins an inclined abutment edge
34 which extends upwardly to a top edge 38 at the junc
tion of the main Wall 24 and the top ?ange 28, the top
edge 36 being parallel to the bottom edge 30:. The re~
maining edge 38 of the main wall 24 is at the junction
thereof with the side ?ange 26, the side edge 38 being
parallel to the side edge 32 and substantially perpendicular
50 to the bottom edge 34} and the top edge 36. There
further is formed in the portion of the main plate 34 ad
jacent to the side ?ange 26 a plurality of circular holes 49
adapted to receive therethrough fasteners, such as the
screws 43, for mounting the bracket 22 upon the upper
end of the associated leg 12, the main plate 24 being
adapted to lie against one edge of the associated leg 12,
the side flange 26 being adapted to engage the outer face
of the associated leg 12, and the top ?ange 28 being
adapted to engage the top end of the associated leg 12;
in addition, a square opening 42 is provided in the main
plate 24 for the reception of a carriage bolt therein ifv
desired.
In order pivotally to interconnect a pair of the side
plates 22, as will be explained more fully hereinafter, the
main plate 24 is provided with a pivot aperture 44 which
is circular in shape and is disposed substantially midway
between the bottom edge 30 and the top edge 36 and
each other and one end of the crosspiece and two of
spaced inwardly a short distance from the inner side edge
the bracket assemblies being utilized to secure a second
$2. There also is provided an elongated guide slot 46
set of legs in converging relationship with each other 70 in the main plate 24 adjacent to the edge 34 thereof, the
and the other end of the crosspiece;
longitudinal axis of the guide slot 46 being disposed sub
FIG. 2 is an enlarged end view of the sawhorse of
stantially parallel to the abutment edge 34. There further
3,078,956
4
is provided a generally L-shaped slot 50 in the main wall
24 including a ?rst arm 52 and a second arm 54, the ?rst
arm 52 being arranged with the longitudinal axis there
of in alignment with the pivot aperture 44 and disposed
therebelow toward the bottom edge 30, and the second
arm 54 extending from the upper end of the arm 52 with
the longitudinal axis thereof substantially perpendicular
12 of the sawhorse 10 are folded toward each other, and
the locking position of FIG. 3 corresponding to a condi
tion wherein the legs 12 diverge outwardly and down
wardly from the crosspiece 14.
In mounting the bracket assembly 20 upon the legs
12 and the crosspiece 14, the bracket assembly 20 may
have the parts thereof pre-assembled before attachment
of the brackets 22 to the legs 12 and before attachment
of the strap 60 to the crosspiece 14, or alternatively, the
torthe longitudinal axis of the arm 52 and extending
toward the side ?ange 26, see FIG. 3 particularly. The
overlapping portions of the arms 52 are arranged sub 10 brackets 22 may be assembled on the associated legs 12
and the strap 63 mounted on the crosspiece 14 after which
stantially vertically when the parts are in the operative
the brackets 22 and the strap 60 are interconnected by
position illustrated in FIG. 3.
the pivot pin 55, the guide pin 72 and the lock pin 80 and
In order to attach the crosspiese 14 to the brackets 22,
their associated parts.
each pair of the brackets 22 is provided with an L-Shaped
Once the parts are assembled as illustrated in the
strap generally designated by the numeral 60 and includ 15
drawings, the lock pin 86 serves to hold the legs 12 in
ing a ?rst ?ange 62 adapted to be ?xedly secured to the
the outer supporting and operative position thereof, the
underside of the crosspiece 14 and a second ?ange 64
lock pin 89 being disposed in the lower ends of the aligned
arranged substantially perpendicular to the ?rst ?ange 62
slots 59 and particularly the lower ends of the arms 52
and when mounted extending away from the underside
thereof. Any effort to move the legs 12 toward each
of the crosspiece 14and substantially normal to the lon
other will be prevented since the edges of the slots 50,
gitudinal axis thereof, a pair of reinforcing embossments
and particularly the edges of the arms 52 thereof, will
65 being provided at the junction of the ?anges 62 and
engage the lock pin 80 and prevent such movement of
64. More particularly, the ?rst ?ange 62 is provided with
the legs 12, whereby the lock pin 80 serves-to hold the
a. plurality. of holes 66 receiving therethrough suitable
fasteners, such as the screws 43,'to mount the strap 60 25 parts of the sawhorse assembly 26 in the erected and
operative position thereof illustrated in FIG. 3.
upon the underside of the crosspiece 14. The second
When it is desired to fold the legs 12 toward each other
?ange 64 has a guide aperture 68 therein substantiallyl
to the position illustrated in FIG. 2, this can readily be
centrally thereof and adapted to be aligned with the guide
accomplished by ?rst placing the sawhorse 10 in the
slots 46 in the associated brackets 22.
>
inverted position diagrammatically illustrated in FIG. 5;
In the bracket assembly 20, the brackets 22 and the
the ‘mere placing of the sawhorse 10 in the position of
strap 60 are arranged with the main plates 24 and the
second ?ange 64 in mutually overlapping relationship
and aguide. pin generally designated by the numeral 72
is provided including a shank 74 extending through the
aligned guide aperture, 68 and the guide slots 46, and an
@nlarged head 76 engaging the outer surface of the strap
?ange 64. The other, end of the shank 74 carries a washer
‘Z8, held thereon by peening over the outer end of the
FIG. 5 will cause the lock pin 80 to move under the
urging of gravity along the aligned slots 58, and particu
larly along the arms 52 thereof, to the aligned portions
nearest the pivot pin 55 and in horizontal alignment with
the arms 54. The outer ends of the legs 12 can now be
moved toward each other whereby to move the pivot pin
8t} into the slot arms 54 until the parts reach the position
illustrated in FiG. 2. When it is desired again to spread
shank 74, whereby the main walls 24 and. the ?ange 64
are held in assembled relationshipv between the head 76 40 the legs 12 to place the parts in the operative position, it
is necessary only to place the sawhorse 10 in the upright
and the washer 78. The guide pin 72 moves along the
guide‘ slots 46 as the parts are moved between the folded
position and the operative position thereof, the guide pin
position thereof, and to move the outer ends‘of the legs
12 away from each other, whereby to cause the lock pin
8%} to move along the slot arms 54 toward the junction
72being in the lower ends of the guide slots 46 when the
parts are in the folded position thereof illustrated in the 45 thereof with the slot arms 52; and when the pivot pin 80
arrives in the slot arms 52, the slot arms 52 will be dis
guide pin 72being in the upper ends of the guide slots
posed vertically and in alignment with each other, where
46, when the parts are‘ in the operative position thereof
by the lock pin 3b can readily fall downwardly under
illustrated in FIG. 3.
the urging of gravity to the locking position illustrated in
The brackets 22 are further pivotally interconnected
by means of a pivot pin 55 including a shank 56 extend 50 FIG. 3.
During the‘ above described movement of the various
ing through the aligned pivot apertures 44 in the over
parts, the brackets 22 are pivoting about the pivot pin 55
lapping portions of the main walls 24, and including an
and the guide pin 72 moves along the guide slots 46 to
enlarged head 57 engaging the outer surface of the ad
provide a movable interconnection between the strap 60
jacent main wall 24. The other end of the shank 56 car~
ries a washer 58 held thereon by peening over the outer 55 and the brackets 22. More particularly, when the legs
end of the shank 56, whereby the main walls 24 are held
12 are in the folded position thereof illustrated in FIG.
in assembled pivotal relationship between the head 57
2, the guide pin 72 is in the lower ends of the guide slots
and the washer 58, this construction serving pivotally to
46; and when the legs 12 are in the diverging and operative
mount the legs 12 with the respect to each other and upon
position thereof illustrated in FIG. 3, the guide pin 72
the associated end of the crosspiece 14 through the strap 60 is in the upper ends of the guide slots 46, the pin 72 mov
60.
ing along the guide slots 46 as the parts are moved be
There also is provided a lock pin which extends through
tween the positions illustrated in FIGS. 2 and 3.
the L-shaped slots 59 in the brackets 22, the lock pin
The strap 60 also has an abutment ?ange 70 thereon
being generally designated by the numeral 80‘ and includ
struck from the ?ange 64 and inclined in a manner such
ing a shank 82 extending through aligned portions of the 65 that it contacts and abuts the abutment edge 34 of the
slots 50 and an enlarged head 84 engaging the outer
surface of the adjacent main wall 24, the other end of the
shank 82 carrying‘ thereon a washer 86 bearing against
bracket 22 disposed outwardly toward the ?ange 64, the
outer end ofthe shank 82. The pivot pin 80 is free to
the pivot pin 55.
?ange 70 contacting the edge 34 serving to limit the
distance that the brackets 22 and the connected legs 12
the outer surface of the main wall 24 of the innermost
bracket 22 and held thereagainst by peening over: the 70 may be pivoted outwardly away from each other about
move within the slots 50 between a non-locking or folded
position illustrated in FIG. 2, and a locking or extended
Accordingly, it will be seen that the legs 12 and the
various parts of the bracket asembly 20 can be moved
between the operative position and the folded position
position illustrated in FIG. 3, the non-locking position
of FIG. 2 corresponding to a condition wherein the legs 75 thereof without the use of any tools and quickly and con
5
3,078,956
6
veniently by simply turning the sawhorse 10 upside down
non-locking position as the legs move between the opera
tive and folded positions thereof, said lock pin in said
and then right side up, or vice versa, as required.
It will be seen that there has been provided an im
locking position being disposed at the ends of the aligned
proved collapsible sawhorse bracket assembly which ful
?rst arms disposed away from the crosspiece with the legs
in the operative position thereof and supporting the cross
?lls all of the objects and advantages set forth above.
Although what is now considered to be the preferred
embodiment of the invention has been shown in the draw
ings and described for purposes of illustration, it is to be
understood that various changes and modi?cations can
be made therein and it is intended to cover by the ap 10
being disposed in aligned portions of said second arms
with the legs in the folded position thereof, said lock pin
being movable from said locking position to said non
locking position under the urging of gravity when said
fall within the spirit and scope of the invention.
What is claimed is:
from the crosspiece and said lock pin being movable from
said non-locking position to said locking position under
pended claims all such changes and modi?cations that
piece thereupon, said lock pin in said non-locking position
assembly is arranged with the legs extending upwardly
1. A collapisible sawhorse bracket assembly for inter
the urging of gravity when the legs diverge outwardly and
connecting a crosspiece and a pair of legs in converging 15 downwardly from the crosspiece.
relationship with each other and to the crosspiece, com
3. A collapsible sawhorse bracket assembly for inter
prising a pair of separate independent brackets, each
connecting a crosspiece and a pair of legs in converging
bracket including a main wall adapted to be ?xedly se
relationship with each other and to the crosspiece, com
cured to one edge of the associated leg at one end thereof,
prising a pair of separate independent brackets, each
means interconnecting the crosspiece and said brackets, 20 bracket including a main wall adapted to be ?xedly se—
said brackets being mutually overlapping and having
aligned pivot apertures the-rethrough, a pivot pin disposed
in said aligned pivot apertures and pivotally interconnect
cured to one edge of the associated leg at one end thereof
and a side ?ange formed integral with said main wall and
disposed substantially perpendicular thereto and along the
ing said brackets to provide an axis for pivoting the legs
outer face of the associated leg at the one end thereof and
between a folded position wherein the other ends thereof 25 a top ?ange formed integral with said main wall and
are adjacent to each other and an operative position
disposed substantially perpendicular thereto and along the
wherein the other ends thereof are spaced apart, each of
top edge of the associated leg at the one end thereof,
said brackets having in the main wall thereof an Li-shaped
means interconnecting the crosspiece and said brackets,
slot including ?rst and second arms, the ?rst arm of each
said brackets being mutually overlapping and having
of said L-shaped slots being arranged with the longitudinal 30 aligned pivot apertures therethrough, a pivot pin disposed
axis thereof in alignment with said pivot apertures and in
in said aligned pivot apertures and pivotally intercon
alignment with the ?rst arm of the other L-shaped slot
necting said brackets to provide an axis for pivoting the
legs between a folded position wherein the other ends
thereof are adjacent to each other and an operative posi
at the end of the associated ?rst arm thereof disposed to 35 tion wherein the other ends thereof are spaced apart,
ward the crosspiece and extending therefrom toward the
each of said brackets having in the main wall thereof an
associated leg, and a lock pin disposed in said slots and
L-shaped slot including ?rst and second arms, the ?rst
movable therealong in the aligned portions thereof be
arm of each of said L-shaped slots being arranged with
tween a locking position‘and a non-locking position as the
the longitudinal axis thereof in alignment with said pivot
legs move between the operative and folded positions
apertures and in alignment with the ?rst arm of the other‘
thereof, said lock pin in said locking position being dis
L-shaped slot when the legs are in the operative position
posed at the ends of the aligned ?rst arms disposed away
thereof, the second arm of each of said L-shaped slots
from the crosspiece with the legs in the operative position
being arranged at the end of the associated ?rst arm
when the legs are in the operative position thereof, the
second arm of each of said L-shaped slots being arranged
thereof and supporting the crosspiece thereupon, said lock
pin in said non-locking position being disposed in aligned
portions of said second arms with the legs in the folded
position thereof.
2. A collapsible sawhorse bracket assembly for inter
connecting a crosspiece and a pair of legs in converging
relationship with each other and to the crosspiece, com
thereof disposed toward the crosspiece and extending
45 therefrom toward the associated leg, and a lock pin dis?
posed in said slots and movable therealong in the aligned
portions thereof between a locking position and a non
locking position as the legs move between the operative
and folded positions thereof, said lock pin in said locking
bracket including a main wall adapted to be ?xedly se
position being disposed at the ends of the aligned ?rst
arms disposed away from the crosspiece with the legs in
the operative position thereof and supporting the cross
cured to one edge of the associated leg at one end there
piece thereupon, said lock pin in said non-locking position
prising a pair of separate independent brackets, each
of means interconnecting the crosspiece and said brackets,
being disposed in aligned‘portions of said second arms
said brackets being mutually overlapping and having 55 with the legs in the folded position thereof.
aligned pivot apertures therethrough, a pivot pin disposed
4. A collapsible sawhorse bracket assembly for inter
in said aligned pivot apertures and pivotally interconnect
connecting a crosspiece and a pair of legs in converging
ing said brackets to provide an axis for pivoting the legs
relationship with each other and to the crosspiece, com—
between a folded position wherein the other ends thereof
prising a pair of separate independent brackets, each
are adjacent to each other and an operative position where 60 bracket including a main wall adapted to be ?xedly se
in the other ends thereof are spaced apart, each of said
cured to one edge of the associated leg at one end thereof,
brackets in the main wall thereof having an L-shaped
an L~shaped strap including a ?rst ?ange adapted to be
slot disposed on the side of said pivot apertures opposite
?xedly secured to the underside of the crosspiece and a
the crosspiece and each including ?rst and second arms,
second flange perpendicular to said ?rst ?ange and ex
the ?rst arm of each of the said L-shaped slots being ar 65 tending away from the underside of the crosspiece and
ranged with the longitudinal axis thereof in alignment
connected to said brackets for interconnecting the cross
with said pivot apertures and extending therefrom away
piece and said brackets, said brackets being mutually
from the crosspiece and in alignment with the ?rst arm
overlapping and having aligned pivot apertures there
of the other L-shaped slot when the legs are in the opera
throngh, a pivot pin disposed in said aligned pivot aper
tive position thereof, the second arm of each of said L 70 tures and pivotally interconnecting said brackets to pro
shaped slots being arranged at the end of the associated
vide an axis for pivoting the legs betweena folded posi
?rst arm thereof disposed toward the crosspiece and ex
tion wherein the other ends thereof are adjacent to each
tending therefrom toward the associated leg, and a lock
other and an operative position wherein the other ends
pin disposed in said slots and movable therealong in the
thereof are spaced apart, each of said brackets having in
aligned portions thereof between a locking position and a 75 the main wall thereof an L-shaped slot including ?rst and
3,078,956
8
second arms, the ?rst arm of each of; said L-shaped‘ slots
being arranged with the longitudinal axis thereof in align
the crosspiece thereupon, said lock pin in said non-locking
position being disposed in aligned portions of said second
- ment with said pivot apertures and in alignment with the
?rst arm of the other L-shaped slot when the legs are in
the operative position thereof, the second arm of each
arms with the legs in the folded position thereof.
6. A collapsible sawhorse bracket assembly for inter
connecting a crosspiece and a pair of legs in converging
relationship with each other and to the crosspiece, com
of said L-shaped slots being arranged at the end of the
gssociated ?rst arm thereof disposed toward the cross
piece and extending therefrom toward the associated
leg, and a lock pin disposed, in said slots and movable
therealong in the aligned portions thereof between a lock 10
ing'pesition and a non-locking position as the legs move
prising a pair of separate independent brackets, each
bracket including a main wall adapted to be ?xedly se
cured to one edge of the associated leg at one end thereof,
an L-shaped strap including a ?rst ?ange adapted to be
?xedly secured to the underside of the crosspiece and a
second ?ange substantially perpendicular to said ?rst
?ange and extending away from the underside of the
cross'piece and substantially normal to the longitudinal
ends. of the aligned ?rst arms disposed away from the
crosspiece with the legs in the operative position thereof 15 axis thereof, said brackets and said strap being mutually
overlapping and said ‘brackets'having aligned pivot aper
and supporting the crosspiece thereupon, said lock pin in
tures therethrough, a pivot pin disposed in said aligned
said non-locking position being disposed in aligned por
pivot apertures and pivotally interconnecting said'brackets
tions of said second arms‘ with the legs in the folded posi
to provide an axis for pivoting the legs between a folded
tion thereof.
5. A collapsible sawhorse bracket assembly for inter. 20 position wherein the other ends thereof are adjacent to
each other and an operative position wherein the other
connecting a crosspiece and a pair of legs in converging
between the operative and folded positions thereof, said
lock pin in said locking position being disposed at the
relationship with each other and to the crosspiece, com
prising a pair ofseparate independent brackets, each
ends thereof are spaced apart, each of said brackets hav
ing a guide slot therein extending in a direction toward the
crosspiece, said second ?ange of said strap having a guide
bracket including a main wall adapted to be ?xedly se-.
cured to one edge of the associated leg at one end thereof, 25 aperture therein in alignment with the guide slots in said
brackets, a guide pin disposed in said aligned guide slots
an L-shaped strap including a ?rst ?ange adapted to be
and guide aperture for interconnecting said brackets and
?xedly secured to the underside of the crosspiece and a
said strap, each of said brackets having in the main wall
second ?ange substantially perpendicular to said ?rst ?ange
thereof an L-shaped slot including ?rst and second arms,
and extending away from the underside of the cross
the ?rst arm of each of said L-shaped slots being arranged
piece and substantially normal to the longitudinal axis
with the longitudinal axis thereof in alignment with said
thereof, said brackets and said strap being mutually over
pivot apertures and in alignment with the ?rst arm of
lapping and said brackets having aligned pivot apertures
the other L-shaped slot when the legs are in the operative
therethrough, a pivot pin disposed in said aligned pivot
position thereof, the second arm of each of said L-shaped
apertures and pivotally interconnecting said brackets to
provide an axis for pivoting the legs between a folded 35 slots being arranged at the end of the associated ?rst arm
thereof, disposed toward the crosspiecei and extending
position, wherein the other ends thereof are adjacent to
each other and an operative position wherein the other
ends thereof are spaced apart, each of said brackets having.
therefrom toward the associated leg, and a lock pin dis,
a guide slot therein extending in a direction toward the
the aligned portions thereof between a locking position
posed in said L__V-shaped slots and movable therea-long in
crosspiece, said second ?ange of said strap having a guide 40 and a non-locking position as the legs move between the
operative and folded positions thereof, said lock pin in
aperture therein in alignment with the guide slots in said
said locking position being disposed at the ends of the
brackets, a guide pin disposed in said aligned guide slots
aligned ?rst arms disposed away from the crosspiece with
and guide aperture for interconnecting said brackets and
the legs in the operative position thereof and supporting
said strap, each of said brackets having in the main wall
thereof an L-shaped slot including ?rst and second arms, 45 the crosspiece thereupon, said lock pin in said non-locking
position being disposed in aligned portions of said second
the ?rst arm of each of said‘ L-shaped slots being arranged
arms with the legs in the folded position thereof, and a
with the longitudinal axis thereof in alignment with said
stop ?ange on said strap engaging one of said plates for
pivot apertures and in alignment with the ?rst arm of
limiting the pivotal'rnovement between said plates when
the other L-shaped slot when the legs are in the operative
position thereof, the second arm of each of said L-shaped 50 thelegs are moved to the operative position thereof.
slots being arranged at the end of the associated ?rst arm
References Cited in the ?le of this patent
thereof disposed toward the orosspiece and extending
therefrom toward the associated leg, and a lock pin dis‘
posed in said L-shaped slots and movable therealong in
the aligned portions thereof between a locking position 55
and a non-locking position as the legs move between the
operative and folded positions thereof, said lock pin in
said locking position being disposed at the ends of the
aligned ?rst arms disposed away from the crosspiece with
the legs in the operative position thereof and supporting 60
‘
UNITED STATES PATENTS
1,748,849
Schmidt _______ __,__,___V__ Feb. 25, 1930
2,412,395
2,555,503
Goosman _, __________ __ Dec. 10, 1946
Morton _..____ _____ u-“ June'5, 1951
2,561,864
2,829,012
2,941,618
Hollywood _______ _______ July 24, 1951
Snyder _____________ _-___ Apr. 1, 1958
Larson ______________ __. June 21, 1960
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