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Патент USA US3078968

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Feb. 26., 1963
c. o. LARSON
3,078,957
COLLAPSIBLE SAWHORSE BRACKET ASSEMBLY
Filed April 4, 1962
_
2 Sheets-Sheet 1
INVENTOR.
BY
Charles 0. Larson
“WWW WWW AW
.
-
- r7f
Feb. 26, 1963
c. o. LARSON
3,078,957
COLLAPSIBLE SAWHORSE BRACKET ASSEMBLY
Filed April 4, 1962
2 ‘Sheets-Sheet 2
Nm m
Charles 0. Larson
BY
W
?nial», waft»), mam/r yea/1Q
United States Patent 0 ”
3,378,957
Patented Feb. 26, 1963
1
2
3,078,957
of wherein the sawhorse legs diverge outwardly and’
downwardly from the crosspiece;
COLLAPSBLE SAWHURSE BRACKET ASSEMBLY
Charles 0. Larson, Sterling, Iil., assignor to Chas. O.
Larson C0., Sterling, Iil., a corporation of lilinois
Filed Apr. 4, 1962, Ser- No. 185,076
5 Claims. (tl‘l. 182-226)
_ This invention relates to sawhorses, trestles, and the
FIG. 4 is a further enlarged and exploded view of
the parts of two bracket assemblies utilized to secure a
pair of sawhorse legs to the sawhorse crosspiece; and
FIG. 5 is a fragmentary view of an end of the saw
horse assembly with the parts in the inverted position
in which they are placed more easily to move the legs
and associated parts from the operative position to the
like, and particularly to a bracket assembly for making
10 folded position thereof.
folding and collapsible sawhorses and the like.
There is shown in the drawings a sawhorse, generally
_ Sawhorses, in addition to the fundamental use thereof
designated by the numeral 10, which has been assemblied
in carpentry, are also widely used as barriers, temporary
utilizing four of the bracket assemblies made in accord
fences, or other obstacles and many of these possible
ance with and embodying the principles of the present
uses are temporary in the sense that the sawhorses may
be utilized only for a short period of time, such for ex 15 invention, the bracket assemblies having have designated
by the numeral 20. More particularly, the sawhorse
ample, as a temporary barricade along a road under
10 includes four legs 12 arranged in pairs at opposite
construction, after which the sawhorses are either stored
ends of a crosspiece 14, the upper ends of the legs 12
or transported to another place of use. Accordingly, it
converging toward each other and toward the adjacent
is desirable that the sawhorses be adapted to have the
legs thereof folded or collapsed between periods of use 20 end of the crosspiece 14. The bracket assemblies 20 at
each end of the sawhorse 10 are identical, and according
and during transportation thereof so that the sawhorses
ly, only one set of parts will be described in detail, like
will occupy the least possible space. It furthermore is
reference numerals being applied where appropriate to
desirable that the sawhorses be foldable or collapsible
like parts in the other bracket assemblies.
with a minimum expenditure of time and energy and also
that the sawhorses be again readily erected when a de
Each of the sawhorse bracket assemblies 20 includes
a pair of separate, independent and identical brackets 22,
mand therefor arises; and when erected the sawhorses
must be strong and rigid.
each of the brackets 22 including a main Wall 24 which
Accordingly, it is an important object of the present
is substantially ?at and planar and a side ?ange 26 formed
invention to provide an improved sawhorse bracket as
integrally therewith and extending the length of the outer
sembly which can be utilized quickly to assemble a saw 30 edge thereof. More speci?cally, the main plate 24 has
horse which can be easily and quickly folded or collapsed
a bottom edge 23 and an inner side edge 30 which are
for transportation or storage thereof.
disposed substantially perpendicular to each other and
Another object of the invention is to provide an im
are joined by a rounded corner 32. The outer edge 34
proved sawhorse bracket assembly of the type set forth
from which extends the side ?ange 26 is disposed at an
in which the legs of the sawhorse are ?rmly held in the ' acute angle of about 73° with respect to the bottom edge
operative position with the associated crossp-iece when
28 and extends upwardly well above the upper end of
it is desired to erect the sawhorse and which can be
the inner side edge 30 as viewed in FIGS. 2 and 3. A
readily collapsed by folding the legs toward each other
top edge 36 is provided on the main plate 24 substantially
without the use of any tools whatsoever.
parallel to the bottom edge 28 and extending from the
Yet another object of the invention is to provide an 40 side ?ange 26 to a cutout portion in the upper inner corner
improved sawhorse bracket assembly of the type set
on the main plate 24, the cutout portion being bounded
forth which after folding and collapsing thereof can be
by an edge 36 substantially perpendicular to the bottom
readily erected to provide a strong and rigid sawhorse
edge 28 and an edge 40 perpendicular to the edge 38 and
without the utilization of any tools whatsoever.
substantially parallel to the bottom edge 28, the edges 38
45
A further object of the invention is to provide an im
and 40 bounding the cutout portion and being adapted
proved sawhorse bracket assembly of the type set forth
to receive therein one side of the crosspiece 14 when the
wherein the legs can be moved between a spread support
bracket assembly 20 is in the operative position thereof
ing position and a folded collapsed position easily and
as illustrated in FIG. 3. There further is formed in the
quickly, the sawhorse bracket assembly, however, being
simple and economical to manufacture and install.
These and other objects and advantages of the inven
50 portion of the main plate 24 adjacent to the side ?ange 26
a plurality of circular holes 42 adapted to receive there
through fasteners, such as the screws 44, for mounting the
tion will be better understood from the following descrip
bracket 22 upon the upper end of the associated leg 12,
the main plate 24 of the bracket 22 being adapted to lie
tion when taken in conjunction with the accompanying
drawings. In the drawings, wherein like reference nu 55 against one edge of the associated leg 12 and the side
?ange 26 thereof being adapted to engage the outer face
merals have been utilized to designate like parts through
out:
of the associated leg 12; in addition, a square opening 46
is provided in the main plate 24 for the reception of a
,_ FIG. 1 is a perspective view of a sawhorse of the type
carriage bolt therein if desired.
which can be constructed utilizing the bracket assembly
. In order pivotally to interconnect a pair of side plates
of the present invention, two of the bracket assemblies
22, as will be explained more fully hereinafter, the main
being utilized to secure one set of legs in converging rela
plate 24 is provided with a pivot aperture 43 which is cir
tionship with each other and one end of a crosspiece
cular
in shape and is disposed substantially midway be
and two of the bracket assemblies being utilized to secure
tween the edges 28 and 40 and spaced inwardly a short
a second set of legs in converging relationship with each
distance from the inner edge 30. There also is provided
65
other and the other end of the crosspiece.
a generally L-shaped slot 50 therein including a ?rst arm
FIG. 2 is an enlarged end view of the sawhorse of FIG.
52 and a second arm 54, the ?rst arm 52 being arranged
1 with certain portions broken away, the parts being
with the longitudinal axis thereof in alignment with the
shown in ‘the positions assumed when the sawhorse legs
pivot aperture 48 and disposed therebelow toward the
are in the folded position thereof;
bottom edge 28, and the second arm 54 extending from
FIG. 3 is a view similar to FIG. 2 showing the parts‘ 70 the upper end of the arm 52 with the longitudinal axis
of the sawhorse assembly in the operative position there
thereof substantially perpendicular to the longitudinal axis
sprees;
3
of the arm 52 and extending toward the outer edge 34
and substantially parallel to the bottom edge 28, see FIG.
3 particularly.
In order to attach the crosspiece 14 to the brackets “22,
each pair of the brackets 22. is provided with an L-shaped.
4
particularly the edges of the ?rst arms 52.!thereof, will
engage the lock pin 80 and prevent such movement of the
‘legs 12, whereby the lock pin 80 serves to hold the parts
of the sawhorse assembly in the erected and operative
position thereof.
strap generally designatedby the numeral 60 and includ
ing a ?rst flange 62 vadapted to be ?xedly secured to the
underside of the crosspiece 14 and a second flange 64
arrangedsubstantially perpendicular to the ?rst flange 62
’
l
.
When it is desired to fold the legs v12 toward each other
to the position illustrated in FIG. 2, this, can be readily
accomplished by ?rst placing thesawhorse 10 in the in
verted position diagrammatically illustrated in‘ FIG. 5;
the mere placing of the sawhorse 10 in the position of
FIG. 5 will cause the lock pin 80 to movepunder the
ofithe crosspiece 14 and ‘substantially normal to the longi
urging of gravity along the aligned-slots 50 and 70, and
tudinal axis thereof, a pair of reinforcing embossments 65
particularly'along the arms 52 of the slots 50- to they
being provided at the junction of the ?anges 62 and 64.‘
aligned portions thereof nearest the pivot pin 72, and in
More particularly, the ?rst ?ange 62. is provided with a
plurality of holes 66 receiving therethrough suitable 15 horizontal align-ment wit-h the second arms 540i the, slots
50. The legs 12,can now be moved toward each other.
fasteners, such as the screws“, to mount the strap 60.
whereby to move the pivot pin 80 into the slot arms 54,
upon the underside of the 'crosspiece 14; the second ?ange
until theparts reach the position illustrated in FIG. 2.
64‘ has a pivot aperture 66 therein substantially centrally
When it- is desired again to spread the legs 12 to place.
thereof and adaptedto be aligned with the pivot apertures
48 in the associated brackets 22, and also has therein an 20 the parts in the operative position, it is necessary only
to place the sawhorse 10 in the. upright ‘positionthereof'
elongated slot 70 having the longitudinal axis thereof in
and to move the outer ends of the legs. 12 away from each
alignment with the pivot aperture 68 and disposed .on the
other, whereby to cause the lock pin 89~to move. along
side thereof away from the ?rst ?ange 62 and having the
the slot arms 54 toward the junction. thereof with the
longitudinal axis thereof also normal to the ?rst ?ange 62.
In the bracket assembly 20, the brackets 22 and the 25 slot arms 52.; and when the pivot pin 80. arrives in. the,
slolt'armsi52,'the slot arms 52 will be invertical align
strap. 60 are arranged with the main plates 24 and the
ment with each other and with the slot 70,‘ whereby the
second ?ange 64in mutually overlapping relationshipand
lock pin‘ 80jcan readily fall downwardly under theurging
a' pivot-pin generally designated by the numeral 72 is pro
of ‘gravity, to the locking position illustrated in FIG. 3.
vided including a shank 74 extending through the aligned
and when mounted extending away from the underside
pivot apertures 48 and 68, and an enlarged head 76 en 30
gaging the outer surface of the strap ?ange 64. The other
end of the shank 74, carries a washer 78 held thereon by
peening over the outer end of the shank 74, whereby the
main walls 24 and the ?ange 64 are held in assembled.
Accordingly, it will be seen that the legs, 12v and thé??l'le;
ous parts of the bracket assembly 20. can be moved be
tween the operative and folded, positions thereof without.
the use of any tools. and quickly andconveniently by
simply turning. the sawhorse 10 upside ,dowuand then
pivotal relationship between the head 76 and the washer 35 right side up, ‘or vice versa, as required.
It willbe seenv there has been provided an improved
78, this construction serving pivotally to mount the legs
collapsible sawhorse bracket assembly which ful?lls all
12'upon the associated end of the crosspiece 14..
of the objects and advantages set forth above. Although
There also is provided a lock pin'which extends through
what is now considered to be. the preferred embodiment
the L-shaped slots 50 in the brackets 22 and the elongated
slot 70 in the strap 60, the lock pin'being generally desig 40 of the invention has been shown in the drawings and
nated by the numeral 80 and including a shank 82. eX-.
described for purposes of illustration, it is understoodv
that various changes. and modi?cations can. be made‘
therein‘ and it is intended to cover by the appended claims
andv an enlarged head 84 engaging the outer surface of
all‘such changes and modi?cations that .fall within the‘
the strap ?ange 64, the other end of the shank. 82 carry
ing thereon a washer 84 hearing againstitheouter surface; 45 spirit and scope of the invention.
I claim:
of’ the main wall 24~of the innermost bracket 22 and, held.
tending through aligned portions of the slots‘ 50 and 70
thereagainst by peening over the outer'end of‘the shank.
82. " The pivot pin ?ttis'free to move within theislots 50
and 70 between a non-locking orfolded position illustrated
in FIG. 2 andr'a looking or extended position illustrated 50
inzFlG. 3, the non-locking position of FIG. 2 correspond
ing toaco-ndition wherein vthe legs 12 of the sawhorse 10,
are, .foldedntowa'rd eachother wi-ththe edges 38tof thev
1‘. A collapsible. sawhorse bracket assembly ‘for. inter.—_
connectingja crosspiece anda pair of legs ,in converging
relationship with each other and to the crosspiece, corn-v
prisingv apair of separate independent brackets, each
bracket including amain well adapted to be ?xedly. se-.
cured to one edge of the associated leg atone end thereof,
an‘ L-shaped strap including a ?rst ?ange adapted to be
?xedly. secured to the underside of the crosspiece and a
position of FIG. 3 corresponding to a condition'wherein 55 second ?ange substanitally perpendicular to said?rst
?ange and. extending away from the underside of the
the. legs12rdiverge outwardly and downwardly. fromthe
brackets 22 spaced from crosspiece .14,‘ and the lockingv
cro'sspiece14 audthe edges 38 of the brackets 22‘are»,
disposed toward'and‘preferably against the longitudinal
crosspiecc. and substantially normal to the longitudinal
axis thereof, said brackets and said strap, being mutually.
overlapping and having aligned‘ pivot ‘apertures there
edges. ‘of the crosspiece 14..
In mounting the bracketv assembly. 20‘upon the-legs 60 through, a pivot pin disposed in saidlaligned pivot.aper-'
tures and pivotally interconnecting said brackets and said
12 and the crosspiece 14, the bracketassembly 20 may"
strap-to provide an axis ?xed with respect to the cross
have the. parts'thereof preassern'bled before attachment
piece for pivoting the legs wtih respect thereto between a
folded position wherein the other ends thereof are ad
brackets '22 may be assembled'on-the associated legs, 12 65 jacent to each other and an operative position wherein
they vother ends thereof are spaced apart, said strap havand the strap 60. mounted .on the crosspiece 14 after
ing an ‘elongated slot in said second ?ange anranged‘with
which the brackets 22 and the strap6t) are interconnected.
the longitudinal axis thereof .in‘ alignment with said pivot.
bythe pivotpp'in72. and the lock pin 80 and their ‘asso
apertures and normal to said ?rst ?ange, each of said
ciated parts.
,
Once the parts are assembled as illustrated in the draw 70 brackets. ‘having an l__-shaped slot in the main .wall thereof
including ?rstand second arms, the ?rst arm of each of
ings, the lock pin .80 serves to hold the legs 12 in the outer
of thebrackets 22 of thelegs 12 and before attachment;
of the strap 60. to the crosspiece 14, or, alternatively, the
said L-shaped slots being arranged with the longitudinal.
axis thereofv in alignment with said elongated slot and
80 being disposed in the lower ends of the aligned slots.
said ?rst arm ofvthe other L-shaped slotpwhen the legs
50 and 70, Any effort to, move the legs 12 toward each
other will be prevented since the edges of the slots 50, and 75 are in the operative position thereof, the second arms of
supporting and- operative position thereof, the lock pin
3,078,957‘
5 ,
each of said L-shaped slots being arranged at the end of
the associated ?rst arm thereof disposed toward said ?rst
?ange and extending therefrom outwardly toward the as
sociated leg, and a lock pin disposed in said three 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 position being dis
6
connecting a crosspiece and a pair of legs in converging
relationship with each other and to the crosspiece, com
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 _
and a side ?ange formed integral with said wall and dis
posed substantially perpendicular thereto and along the
outer face of the associated leg at said one end thereof,
posed at the ends of the aligned ?rst arms and the elon
said main wall and said side ?ange extending beyond
gated slot disposed away from said ?rst ?ange with the 10 the adjacent end of the associated leg and said main wall
legs in the operative position thereof and supporting the
having a cutout therein on the edge opposite said side
crosspiece thereupon, said lock pin in said non-locking
position being disposed in aligned portions of said second
?ange for receiving and supporting the crosspiece therein,
arms and said elongated slot with the legs in the folded
?xedly secured to the underside of the crosspiece and a
position thereof.
an L-shaped strap including a ?rst ?ange adapted to be
15 second ?ange substantially perpendicular to said ?rst
2. The collapsible sawhorse bracket assembly set forth
?ange and extending away from the underside of the
in claim 1, wherein a pair of brackets and a strap is pro
crosspiece and substantially normal to the longitudinal
vided on each side of each of the legs.
axis thereof, said brackets and said strap being mutually
3. A collapsible sawhorse bracket assembly for inter
overlapping and having aligned pivot apertures there
connecting a crosspiece and a pair of legs in converging 20 through, a pivot pin disposed in said aligned pivot aper
relationship with each other and to the crosspiece compris
tures and pivotally interconnecting said brackets and said
ing a pair of separate independent brackets, each bracket
strap to provide an axis ?xed with respect to the cross
including a main wall adapted to be ?xedly secured to one
edge of the associated leg at one end thereof and a side
piece for pivoting the legs with respect thereto between
a folded position wherein the other ends thereof are ad
?ange formed integral with said wall and disposed sub 25 jacent to each other and an operative position wherein
stantially perpendicular thereto and along the outer face
the other ends thereof are spaced-apart and the cutout
of the associated leg at the one end thereof, an L-shaped
portions of said brackets cooperate to engage the cross
strap including a ?rst ?ange adapted to be ?xedly secured
piece and to provide support beneath and on the sides
to the underside of the crosspiece and a second ?ange sub
thereof, said strap having an elongated slot in said second
stantially perpendicular to said ?rst ?ange and extending 30 ?ange arranged with the longitudinal axis thereof in
away from the underside of the crosspiece and substan
alignment with said pivot apertures and normal to said
tially normal to the longitudinal axis thereof, said bracket
?rst ?ange, each of said brackets having an L-shaped
and said strap being mutually overlapping and having
slot in the main wall thereof including ?rst and second
aligned pivot apertures therethrough, a pivot pin disposed
arms, the ?rst arm of each of said L~shaped slots being
in said aligned pivot apertures and pivotally intercon 35 arranged with the longitudinal axis thereof in alignment
necting said brackets and said strap to provide an axis
with said pivot apertures and in alignment with said
?xed with respect to the crosspiece for pivoting the legs
elongated slot and said ?rst arm of the other L-shaped
with respect thereto between a folded position wherein
slot when the legs are in the operative position thereof,
the other ends thereof are adjacent to each other and an
the second arm of each of said L-shaped slots being ar
operative position wherein the other ends thereof are 40 ranged at the end of the associated ?rst arm thereof dis
spaced apart, said strap having an elongated slot in said
posed toward said ?rst ?ange and extending therefrom
second ?ange arranged with the longitudinal axis thereof
toward the associated side ?ange, and a lock pin disposed
in alignment with said pivot apertures and normal to
in said three slots and movable therealong in the aligned
said ?rst ?ange, each of said brackets in the main wall
portions thereof between a locking position and a non
thereof having an L-shaped slot including ?rst and second 45 lockin-g position as the legs move between the operative
arms and disposed on the side of said pivot apertures
and folded positions thereof, said lock pin in said lock
opposite said ?rst ?ange, the ?rst arm of each of said
ing position being disposed at the ends of the aligned ?rst
L-shaped slots being arranged with thelongitudinal axis
arms and the elongated slot disposed away from said
thereof in alignment with said pivot apertures and in
?rst ?ange with the legs in the operative position thereof
alignment with said elongated slot and said ?rst arm of 50 and supporting the crosspiece thereupon, said lock pin
the other L-shaped slot when the legs are in the opera
in said non-locking position being disposed in aligned
tive position thereof, the second arms of each of said
portions of said second arms and said elongated slot
L-shaped slots being arranged at the end of the associated
with the legs in the folded position thereof.
?rst arm thereof disposed toward said first ?ange and
5. A collapsible sawhorse bracket assembly for inter
extending therefrom toward the associated side ?ange,
connecting a crosspiece and a pair of legs in converging
and a lock pin disposed in said three slots and movable
relationship with each other and to the crosspiece, com~
therealong in the aligned portions thereof between a
prising a pair of separate independent brackets, each
locking position and a non-locking position as the legs
bracket including a main wall adapted to be ?xedly se
move between the operative and folded positions thereof,
cured to one edge of the associated leg at one end thereof
said lock pin in said locking position being disposed at
and a side ?ange formed integral with said wall and dis
the ends of the aligned ?rst arms and the elongated slot
posed substantially perpendicular thereto and along the
disposed away from said ?rst ?ange with the legs in
outer face of the associated leg at the one end thereof,
the operative position thereof and supporting the cross
said main wall and said side ?ange extending beyond the
piece thereupon, said lock pin in said non-locking posi
adjacent end of the associated leg and said main Wall hav
tion being disposed in aligned portions of said second
ing a cutout therein on the edge opposite said side ?ange
arms and said elongated slot with the legs in the folded
for receiving and supporting the crosspiece therein, an
position thereof, said lock pin being movable from said
locking position to said non-locking position under the
urging of gravity when said assembly is arranged with
the legs extending upwardly from the crosspiece and said
lock pin being movable from said non-locking position
to said locking position under the urging of gravity when
the legs diverge outwardly and downwardly from the
crosspiece.
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 crosspiece and
substantially normal to the longitudinal axis thereof, said
brackets and said strap being mutually overlapping and
having aligned pivot apertures therethrough, a pivot pin
disposed in said aligned pivot apertures and pivotally in
4. A collapsible sawhorse bracket assembly for inter 75 terconnecting said brackets and said strap to provide an
3,0725%?
7
8 ,
.
thereof, said lock pin in said locking position beingdis~
axis-.?xed-with respect to the crosspiece for pivoting'the
legs with respect-thereto between a folded position wherein
posed- atpthe ends of the aligned ?rst arms and‘the elon
gated slot'disposed'away from'said ?rst ?ange with they
legs in the operative position thereof and supporting the
the other'ends thereof are adjacent to each other and an
operative position wherein the other‘ ends thereof are
spaced-apart and the cutout portions of said brackets coop
crate to engage the crosspiece and to provide support‘
beneath and on the sides thereof, said strap having an
. crosspiece thereupon, said lock- pin in said non-locking:
position being disposed in aligned portions of said ‘second
arms and said elongated slotvwith the legs in the folded
elongated slot- in said second flangev arranged with- the
longitudinal axis thereof in alignment with said pivot aper
tures and normal to said-?rst ?ange, each of said brackets
in‘ the main. wall thereof having an L-shaped slot includ
ing ?rst and second arms and disposed on’ the side-of said
pivotva'pertures opposite said ?rst ?ange, the ?rstarm of’
eaehofv said L-shaped slots being arranged with the longi
tudinal. axis. thereof in alignment with" said pivotaper 15
tures’and inlalignment with said‘elongated slot and said»
?rst .arm, of theother .L-shaped slot when the legs arein
the. operative position thereof, the second arms of each
position thereof, said lock pin being movable from, said‘
locking position-to said non-locking position under the
urging of'gravity when said assembly is arranged with:
the'legs extending upwardly from’ the crosspiece and said.
‘lock pin being movable from said non-locking position to
said locking position under the urging of gravity vwhen the
legs diverge outwardly and downwardly from thecross
piece. _
References Cited in the ?l'eof} this patent:
UNITED STATES PATENTS
of said -L_-shaped slots‘, being arranged at the end of the
associated - ?rst arrn thereof disposed toward said ?rst 20 1,748,849
?ange and extending therefrom toward the associated side
2,412,395
Schmidt, _____________ __ Feb; 25,1930"
Goosman ____________ .. Dec. 10, 1946
?ange, and/a loclrpin disposed in said three slots and
movabletherealong in the "aligned portions thereof be
2,555,503
Morton _______________ ..,June 5, 195i,
2,561,864
2,829,012
Hollywood ___________ __ July 24,‘ 1951
Snyderv ______________ _._ Apr. 1, 1958
2,941,618
Larsonv ______________ __ June 21, 1960"
tween 21 looking position and a non-locking position as the.
‘legs move’ between‘ the operative and‘folded' positions
25
ar0.-q,
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