U.S. patent number 3,656,581 [Application Number 05/023,739] was granted by the patent office on 1972-04-18 for sawhorse bracket assembly.
This patent grant is currently assigned to Charles O. Larson Co.. Invention is credited to Charles O. Larson.
United States Patent |
3,656,581 |
Larson |
April 18, 1972 |
SAWHORSE BRACKET ASSEMBLY
Abstract
A bracket assembly for use in the formation of a sawhorse or the
like structure. The assembly includes a main support bracket having
a generally triangular face plate with a slot of a predetermined
width extending inwardly from the apex thereof and a shelf portion
extending outwardly from a first surface of the face plate at the
base of the slot; and an auxiliary bracket mounted on the main
bracket. The auxiliary bracket includes a plate portion having a
width at least at a predetermined point therealong equal to the
width of the slot in the main bracket and being received thereat in
the slot. A first section of the plate portion extends from the
first surface of the face plate and rests on the shelf portion. A
second section extends from the opposite surface of the face plate
and includes flanges along the sides thereof, the ends of which are
butted against the second surface of the face plate. The cross
member of the sawhorse structure rests on the auxiliary bracket and
aligned apertures in the latter and in the shelf portion serve to
allow for the insertion of a screw fastener into the cross member.
Side flanges along the face plate have apertures at the upper ends
thereof for passage of screws into the cross member.
Inventors: |
Larson; Charles O. (Sterling,
IL) |
Assignee: |
Charles O. Larson Co.
(Sterling, IL)
|
Family
ID: |
21816921 |
Appl.
No.: |
05/023,739 |
Filed: |
March 30, 1970 |
Current U.S.
Class: |
182/224 |
Current CPC
Class: |
B25H
1/06 (20130101) |
Current International
Class: |
B25H
1/00 (20060101); B25H 1/06 (20060101); F16m
011/00 (); E04g 001/32 () |
Field of
Search: |
;182/181,185,224 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Machado; Reinaldo P.
Claims
I claim:
1. An arrangement for interconnecting a cross member and a pair of
legs of predetermined lengths and sizes in converging relation to
form a support, said arrangement comprising a pair of bracket
assemblies, each said assembly including a main support bracket
member having a triangular shaped face plate with a slot of
predetermined width extending downwardly thereinto from the apex,
with a shelf portion extending outwardly from a first surface of
said face plate at the base of said slot, said shelf portions of
said pair of brackets being in an aligned opposing relation, each
of said brackets further including flanges inclined along each side
thereof and extending toward the flanges of the other bracket for
receiving and engaging therebetween said legs, and a pair of
auxiliary brackets, each one of said pair being associated with a
corresponding main support bracket and each comprising a plate
portion having a width substantially equal to the width of said
slot and being received in said slot, said plate portion having a
first section extending outwardly from said first surface of the
face plate of said corresponding main support bracket and resting
on a corresponding shelf portion with said first section and shelf
portion having aligned apertures for receiving a screw fastener to
be threaded into the bottom of the cross member and a second
section extending outwardly from the opposite surface of said face
plate and apertured to receive a screw fastener to be threaded into
the bottom of the cross member and further including opposed
laterally open notches between said first and second sections
receiving the slot forming edge portions of said main support
brackets, and each of said flanges having an aperture therethrough
adjacent the upper end thereof for receiving a screw fastener to be
threaded into the side of the cross member and with the axes of the
said apertures in said flanges inclined downwardly to
correspondingly position screw fasteners received therein for
causing end portions of the flanges to bite into the cross members
under influence of the screw fasteners with resultant compression
of the flange portions adjacent the edges of the slot causing said
edges to snug the adjacent surfaces of an inserted cross member in
line with said notches, said cross member being received in the
slots of said main brackets and supported on the auxiliary brackets
in position for screw fasteners in said apertures to be threaded
thereinto for substantially nonwobble support thereof on legs
secured between the face plates of the main brackets with the
aligned apertures in the shelf portions and auxiliary brackets
being disposed in substantially the vertical planes of the
corresponding apertures at the upper ends of the flanges to
correspondingly position screws received therein with the screws
arranged in a generally transverse triangular positioning for
engagement of corresponding screws with the bottom and sides of the
cross member and with the screws through the second sections of the
plate portions arranged with the other screws in a generally
longitudinal triangular positioning for additional engagement
thereof with the bottom of the cross member whereby to provide a
close-coupled array of screws transversely and longitudinally of
the cross member, said second section of each plate portion
including depending flanges with substantially vertical edges to
abut the adjacent face of the main bracket for aligning the
aperture in each first section with the aperture in the
corresponding underlying shelf portion for screw reception
therethrough into engagement with the cross member for assembly and
facilitating disassembly by permitting ready removel of the
auxiliary brackets from the main brackets upon removal of the screw
fasteners.
Description
SUMMARY OF THE INVENTION
It is a general object of this invention to provide a new and
improved bracket assembly for use in forming sawhorses or the
like.
It is a more specific object of this invention to provide an
auxiliary bracket for use with a support forming bracket such as
shown in my U.S. Pat. No. 3,042,144, which provides added stability
and strength to a sawhorse, etc., formed with the last-mentioned
bracket, and with screw fasteners binding the cross member against
wobble to the bracket assembly.
It is another object of this invention to provide an auxiliary
bracket for use with a support bracket like the one described
above, which provides for added ease of assembly of a sawhorse or
the like structure and which is simple and inexpensive to
produce.
IN THE ACCOMPANYING DRAWING
FIG. 1 is a fragmentary perspective view of a sawhorse structure
formed through the use of a plurality of bracket assemblies
according to the invention;
FIG. 2 is an exploded perspective view of a bracket assembly
according to the invention;
FIG. 3 is a sectional view of the sawhorse structure of FIG. 1,
taken on the line 3--3 of FIG. 1;
FIG. 4 is a sectional view of a bracket assembly according to the
invention, taken on the line 4--4 of FIG. 3; and
FIG. 5 is a top plan view of the auxiliary bracket.
DETAILED DESCRIPTION
Referring now to the drawings more in detail, FIG. 1 thereof
illustrates a portion of a sawhorse 10 including a crosspiece or
member 12, a pair of legs 14 and a pair of bracket assemblies 16
according to the invention, each including a main support bracket
18 and an auxiliary bracket 20 for interconnecting the crosspiece
12 of the sawhorse structure to the legs 14 thereof.
Turning to FIG. 2, a bracket assembly 16 is shown both in
unassembled condition, respectively. The main bracket 18 of the
bracket assembly includes a face plate 22 of a generally triangular
shape. The face plate is preferably formed as an equilateral
triangle including an angle of 33.degree. between the equal length
sides 24 thereof, for it has been found that at this angle the
supporting legs 14 (FIG. 1) provide more strength and stability to
the sawhorse or the like structure.
The bracket 18 further includes a rectilinear slot or opening 26 of
a predetermined width indicated as "X" to receive therein a length
of lumber or the like material to form a crosspiece, such as 12 of
FIG. 1, of the sawhorse. A shelf or ledge 28 is disposed at the
base of the slot 26 and extends rearwardly from the face plate 22
and substantially perpendicularly thereto. The shelf is provided as
a support upon which the crosspiece 12 may rest as well as a stop
for legs 14 therebeneath. The equal length sides 24 of the face
plate 22 are provided with flanges 30 which extend rearwardly and
perpendicularly therefrom. The converging flanges 30 (FIG. 1)
define channels for constraining legs 14 of the sawhorse structure
10.
The auxiliary bracket 20 comprises an elongated plate 34 having
first and second sections 36 and 38, respectively. The first
section 36 includes an aperture 40 extending through the section
and a pair of flanges 42 extending downwardly along the sides
thereof perpendicularly to the plate 34. The second section 38 has
an aperture 44 therethrough and may include a pair of notches 43 on
opposite sides thereof, the purpose of which will be explained
hereinafter. The width of the auxiliary bracket 20 is slightly
larger than the width ("X," FIG. 2) of slot 26, so that the bracket
may be mounted between the edges 50 defining the slot only at
notches 43 thereof whereat the width is approximately equal to the
width of the slot 26. Thus, edges 50 are received in notches 43 as
auxiliary bracket 20 is slipped downwardly onto the shelf 28. If
desired, however, the width of bracket 20 may be equal to that of
slot 26 and notches 43 eliminated. This provides for a more simple
and less costly construction of the auxiliary bracket 20. The
vertically oriented ends 52 of flanges 42 of the auxiliary bracket
are butted against face plate 22 when the bracket 20 is in position
on shelf 28 to further support section 36 of the bracket 20 against
the weight of a crosspiece 12 placed thereon.
FIG. 3 illustrates the manner in which a pair of bracket assemblies
16 maintain legs 14 and crosspiece 12 of the sawhorse structure 10
in an assembled relation. A pair of bracket assemblies 16 are
combined with a pair of legs 14 by disposing the bracket assemblies
back-to-back in a spaced-apart relation and situating the legs 14
within the channels formed by the adjacent flanges 30 of the main
brackets 18 of the respective assemblies. In order to establish
positive alignment between the two bracket assemblies, a number of
preferably rectangular holes 56 are provided in the face plate 22
of each of the main brackets. Carriage bolts 58 or other suitable
fasteners may be inserted through aligned holes 56 in each of the
two main brackets 18 to have wing nuts 60 threaded about their free
ends so as to draw the bracket assemblies together closely about
legs 14 to secure them therebetween. The lower bolts engage the
legs 14 for added rigidity. Crosspiece 12 is inserted into slot 26
of both main support brackets 18. A screw 63 may be inserted
through aperture 62 near the apex of the bracket 18 in flanges 30
thereof to aid in securing the crosspiece 12 thereto.
It will be noted that crosspiece 12, due to the addition of
auxiliary brackets 20 is provided with added area for the support
thereof and for the distribution of weight carried thereby when the
sawhorse is being used. In addition, to better secure the
crosspiece 12 to the bracket assembly 16, a screw fastener 54 may
be inserted from beneath crosspiece 12 through aperture 40 in
auxiliary bracket 20 and into the lower surface of the crosspiece.
Because the section 36 of the bracket 20 is spaced from the leg
assembly and extends outwardly from the main bracket 18, easy
access to aperture 40 for the insertion of fastener 54 therein is
provided. Further, a screw fastener 64 extends through opening 44
in the portion 38 of the auxiliary bracket and through opening 66
in the shelf portion 28 of the main bracket and into the crosspiece
12. Thus, it will be seen that the crosspiece is secured by screw
fasteners 63 to the flanges 30 and these screw fasteners are
slightly angled downwardly. When tightened, these screw fasteners
tend to cause the inner top edges 30a of the flanges 30 to bite
into the crosspiece with a wedging action and with compressive
action in the flange portion toward the edges 50 of the slots, thus
tending to constantly wedge edges into engagement with the
crosspiece. Also, the crosspiece is secured to the shelf portion 28
and to the auxiliary bracket portion 38 by screw fasteners 64 which
are in the same vertical plane with corresponding screws 63. In
this relationship, the screw fasteners 63,64 of each pair cooperate
with one another, by reason of the inclination of the screws 63, to
urge the crosspiece into tight engagement with the auxiliary
bracket and main bracket shelf portion and with the edges 50 of the
slot 26 and the ends of the flanges 30. This confinement of the
crosspiece and the interaction between the pairs of screws 63,64
makes for an assembly without wobbling and any tendency theretoward
can be immediately corrected by tightening the screws. To further
guard against wobble, the screws 54 through the openings 40 in the
auxiliary bracket and into the bottom of the crosspiece tend to
maintain the support surface of the auxiliary bracket in continuous
surface contact with the bottom of the crosspiece.
* * * * *