US3700072A

US3700072A - Sawhorse with retractable legs

Info

Publication number: US3700072A
Application number: US83322A
Authority: US
Inventors: Maxwell J Lovett
Original assignee: Individual
Current assignee: Individual
Priority date: 1970-10-23
Filing date: 1970-10-23
Publication date: 1972-10-24
Anticipated expiration: 1989-10-24

Abstract

A sawhorse structure comprising a transverse work support member and a pair of legs normally diverging downwardly and outwardly from each end portion of the transverse member, the pairs of legs being adapted to be retracted from the diverging positions in a manner so as to reduce the necessary storage or transportation space of an average size saw horse from approximately 10 cubic feet to approximately 1 1/4 cubic feet. The mechanism for retracting the legs includes a pair of interconnected brackets fixed to each end portion of the transverse member, and pivots connecting one leg to each bracket, a unique application of a pair of yokes associated with each bracket whereby each leg is maintained in either the extended or the retracted position by the pivots and three legs of the pair of yokes, a latch mechanism being employed to lock each leg in either of the retracted or extended positions.

Description

Unite States Patent Lovett 154] SAWHORSE WITH RETRACTABLE LEGS [72] Inventor: Maxwell J. Lovett, 3511 Hilltop Lane, Cocoa, Fla. 32922 [22] Filed: Oct. 23, 1970 [21] Appl. No.: 83,322

[52] US. Cl. ..182/155 [51] Int. Cl. ..E04g 1/32, F16m 11/00 [58] Field of Search ..l82/155, 225, 224

[56] References Cited UNITED STATES PATENTS 1,583,652 5/1926 Brooks 182/155 3,269,487 8/ 1 966 Larson 182/155 3,414,080 12/1968 Doucette ..182/ 155 Primary Examiner-Reinaldo P. Machado Attorney-Alfred E. Wilson 51 Oct. 24, 1972 [5 7] ABSTRACT A sawhorse structure comprising a transverse work support member and a pair of legs normally diverging downwardly and outwardly from each end portion of the transverse member, the pairs of legs being adapted to be retracted from the diverging positions in a manner so as to reduce the necessary storage or transportation space of an average size saw horse from approximately 10 cubic feet to approximately 1% cubic feet. The mechanism for retracting the legs includes apair of interconnected brackets fixed to each end portion of the transverse member, and pivots connecting one leg to each bracket, 21 unique application of a pair of yokes associated with each bracket whereby each leg is maintained in either the extended or the retracted position by the pivots and three legs of the pair of yokes, a latch mechanism being employed to lock each leg in either of the retracted or extended positions.

6 Claims, 7 Drawing Figures PATENTEDUCT 24 I972 SHEET 1 0f 2 INVENTOR. MAXLUELL 11. LOVETT HTTOANEX SAWI-IORSE WITH RETRACTABLE LEGS The present invention pertains to a sawhorse and more particularly to a sawhorse employing a unique bracket, yoke, pivot and latch mechanism whereby the legs of the sawhorse may be positioned in a normal extended in use, position or retracted to a transportation or storage position.

One of the principal objects of my invention is, therefore, to provide a sawhorse which employs the bracket, yoke, pivot and latch mechanism in a unique manner whereby the legs thereof may be positioned in the extended, in use, position and supported in a manner to provide a very rigid structure whereby the work operations being performed onthe sawhorse may be accomplished with a great degree of accuracy.

Another principal object of my invention is to provide a structure whereby each leg may be retracted from the extended position with a minimum of effort and this may, in fact, be accomplished with one hand.

Yet another object of my invention is to provide a sawhorse wherein the legs, when retracted, extend inwardly immediately below and in substantial parallelism with the transverse support member.

Another object of the invention is to provide a latch mechanism whereby each leg is automatically securely locked in either the extended or retracted position by simply moving the leg into either of such positions.

Still another object of my invention is to provide a sawhorse structure of the above-described type which is not only rugged and stable in use but is economical to produce.

In the Drawings:

FIG. 1 is a perspective view of a sawhorse embodying the present invention illustrating one pair of legs in the extended position and the other pair of legs in the retracted position;

FIG. 2 is an enlarged elevational view of one of the leg supporting brackets of the present invention with the leg associated therewith being illustrated in an extended position; the leg FIG. 3 is a fragmentary end view of the sawhorse with parts being broken away to better illustrate the invention;

FIGS. 4, 5, 6 and 7 are a series of schematic views illustrating the movement of one leg of the sawhorse from the extended to the retracted position.

In the drawings in which like reference characters designate like or similar parts throughout the various views, the numeral 10 generally designates the sawhorse of the present invention which includes a transverse work support member 12, four brackets generally indicated at 14 fixed in opposed pairs adjacent each end of the transverse support member 12 as best illustrated in FIG. 1 and a leg 16 associated with each bracket 14. Each opposed pair of brackets 14 is preferably interconnected by a face plate 18 fixed to each of the brackets of said pairs by attachment means 20, FIGS. 1 and 2.

It should be noted that each of the brackets and associated legs is of identical construction and the following detailed description will be in the singular but will apply to each of said four bracket and leg structures.

Each pair of brackets diverge downwardly and outwardly to any suitable predetermine degree which enables the downward and outward angle of divergence of each pair of legs 16 when the legs are in their extended position as illustrated on the left side of FIG. 1.

Each bracket 14 includes an inwardly turned flange 22 along its upper edge, said flange being provided with a plurality of apertures 24 through which fastening means such as the screws 26 are passed into the underside 28 of the transverse member 12. The angular relationship between the flange 22 and the main body portion 30 of the bracket establishes the aforementioned angle of divergence of each pair of legs 16. A pair of upwardly turned lugs 32-32, outwardly of each end of the flange 22 is adapted to rest against a vertical face 34 of the transverse member 12, the principal utility of said lugs 32-32 is to provide for accurate positioning and alignment of all four brackets 14 relative to each other.

As best illustrated in FIGS. 2 and 3, the bracket 14 is provided with a pivot pin 36, fixed to the main body portion 30 as by welding, which extends inwardly of the inner face 38 thereof. The pivot pin 36 is adapted to be passed through a vertically disposed elongated slot 40 in the leg 16, the slot including upper and lower ends 42 and 44, and being positioned a predetermined distance downwardly from the upper end 46 of the leg 16. A washer and spring retaining ring mechanism 48 and 50 are utilized to maintain the leg 16 in position on the pivot pin 36 with the outer face of the upper portion of the leg 16 lying against the inner face 38 of the bracket 14.

With particular reference to FIG. 2 and FIGS. 4 through 7, it is seen that each bracket 14 is provided with a pair of

yokes

52 and 54 extending inwardly from the inner face 38 thereof. The yoke 52 includes an outer and an inner arm 56 and 58 fixed as by welding to the main body portion 30 of the bracket 14 and a span 60 connecting the arms 56 and 58. The yoke 54 includes an upper and a

lower arm

62 and 64 fixed to the bracket 14 in the same manner as legs 56 and 58 of yokes 52 and a span 66 connecting the

arms

62 and 64. With further reference to the aforementioned Figures, it is seen that the span 60 of the yoke 52 lies in a plane angled inwardly and somewhat downwardly from a horizontal plane and the span 66 of the yoke 54 lies in a plane angled downwardly and somewhat inwardly from a vertical plane in a manner so as to provide an angular relationship of somewhat less than 90 between the

spans

60 and 66. The throats provide by both

yokes

52 and 54 are sized to substantially conform to the cross sectional size of the leg 16 whereby the upper end portion of the leg may be selectively slid along the inside face 38 of the bracket 14 through the throat of either

yokes

52 or 54.

Each bracket 14 is provided with an outer, outwardly turned flange 70, and similar lower and

inner flanges

72 and 74. The outer flange 70 is adapted to receive the attaching means 20 for the face plate 18 as previously described and the lower and

inner flanges

72 and 74 are adapted to cooperate with a spring latch means 76 fixed to the leg 16 to selectively hold the leg 16 in either an extended or retracted position. The spring latch means 76 comprises a base portion 78, fixed as by screws 80 to the leg 16, which is positioned relative to the bracket 14 whereby properly configurated a leaf spring 81, fixed as by rivets 82 to the base 78, is adapted to be selectively engaged over the flange 72 to hold the leg 16 in an extended position, or over flange 74 to hold the leg 16 in a retracted position.

FIGS. 4 through 7 are a sequential series of schematic views starting with the leg 16 latched in an extended position in FIG. 4 and ending with the leg 16 latched in a retracted position in FIG. 7. With particular reference to FIG. 4 it is seen that the pivot pin 36 is in engagement with the bottom end 44 of the elongated slot 40 and is being held thusly by engagement of the leaf'spring 81 over the lower flange 72 of the bracket 14. In this position the upper end portion of the leg 16 is extending through the throat provided by yokes S2 and the outer side face 82 of the leg 16 in engagement with arm 56 of the yoke 52 and arm 64 of yoke 54 while the inner side face 84 is in engagement with arm 58 of yoke 52.

In FIG. the spring leaf 81 of the latch 76 has been manually .disengaged from the lower flange 72 and the leg 16 has been slid downwardly until the pivot pin 36 engages the upper end 42 of the slot 40. It is to be noted that the inner and outer side faces 84 and 82 are still in respective engagement with arms 58 and 64 of

yokes

52 and 54, but face 82 has become disengaged from arm 56 of yoke 52 whereby the upper outer corner 86 of the leg 16 will swing clear of

arms

56 and 62 when the leg 16 is pivoted counterclockwisely to a retracted position illustrated in FIG. 6. Arm 64 of yoke 54 acts as a stop and positions the leg 16 for subsequent sliding engagement of the upper end thereof through the throat provided by yoke 54 as illustrated in FIG. 7, whereupon the spring leaf 81 of latch 76 automatically snaps over flange 74 of bracket 14 locking the leg 16 in the retracted position with the pivot pin 36 once again in engagement with the bottom end 44 of slot 40.

When it is desired to re-extend the leg 16, the procedure just described is reversed and the arm 58 of the yoke 52 acts to position the leg for subsequent sliding movement into the throat provided by the yoke 52.

It is also noteworthy that legs of varying length may be provided whereby longer or shorter legs may be quickly substituted by simply removing the spring retaining rings 50 and washer 48 sliding the legs to the position illustrated in FIG. 5 and swinging the legs outwardly in a plane perpendicular to the plane of the transverse member 12 until the slot 40 is clear of the pivot pin 36. By reversing this procedure other legs may then be reinstalled.

While the present invention has been illustrated and described in a preferred form, it is readily apparent that various changes, substitutions and modifications may be made with the scope of the appended claims.

lclaim:

1. A sawhorse with retractable legs comprising;

A. a generally horizontally disposed transverse work support member;

B. four brackets fixed in opposed pairs to said work support member with one pair being positioned adjacent each end thereof, each of said pairs diverging outwardly and downwardly from said support member in a common plane and such bracket having,

I. an outer face,

2. an inner face,

3. bottom and inner flanges extending outwardly of said outer face, and

4. pivot pin means fixed to and extending inwardly from said inner face;

C. four legs for respective connection in opposed pairs of brackets, each of said legs having,

1. an upper end,

2. outer and inner faces, and

3. a longitudinal slot therethrough, positioned a predetermined distance inwardly from said upper end, for the reception of said pivot pin means therethrough, said slot having an upper and a lower end;

D. retainer means fixed to each of said pivot pin means and loosely bearing against said inner face of each of said legs whereby each of said legs is retained in position on its respective pivot pin with the upper portion of said outer face thereof in bearing engagement against said inner face of said bracket, each of said legs being free to be pivoted on said pivot pins and to be slid longitudinally on said pivot pin a predetermined distance as determined by the length of said slot;

E. a first and a second yoke means fixed to each of said brackets and extending inwardly from the inner face thereof, each of said first and second yoke means providing an open throat sized to generally conform to the cross sectional size of said legs, each of said first yokes being positioned to slidably receive the upper end portion of one of said legs through said throat to hold said leg in an extended position with said pivot pin in contact with said lower end of said slot, each of said second yokes being positioned to slidably receive the upper end portion of one of said legs through said throat to hold said leg in a retracted position with said pivot pin in contact with said lower end of said slot, each of said legs being pivotal between said extended and retracted positions when said leg is slid on said pivot pin until said pivot pin is in contact with said upper end of said slot.

2. A saw horse with retractable legs as defined in claim 1 including latch means whereby each of said legs may be automatically, selectively locked in either of said extended or retracted positions.

3. A saw horse with retractable legs as defined in claim 2 in which each of said latch means comprises a body portion fixed to one of said legs and a spring leaf means fixed to said body portion which is adapted to be engaged over said bottom flange when said leg is in an extended position as over said inner flange when said leg is in a retracted position, said spring leaf being readily, manually releasable to permit said sliding and pivotal movement.

4. A sawhorse with retractable legs as defined in claim 1 in which each of said yokes comprises a first and a second arm and a span connecting the inner ends of said first and second arms with the outer ends of said arms being fixed to said bracket, said first and second yokes being positioned in an angular relationship relative to said legs whereby said first arm of said first yoke acts as a stop means to position said leg in the proper extended position when said pivot pin is in contact with said upper end of said slot, and said first arm of said second yoke acts as a stop means to position said leg in a proper retracted position when said pivot pin is in contact with said upper end of said slot, the upper end of said leg passing clear of said second arms of both the first and second yokes when being pivoted between retaining ring engaged in an annular groove adjacent the inner end of each of said pivot pin means, said spring retaining ring bearing against the inner face of said washer.

6. A sawhorse with retractable legs as defined in claim 1 including a face plate and fastening means interconnecting each of said pair of opposed brackets.

Claims

1. A sawhorse with retractable legs comprising; A. a generally horizontally disposed transverse work support member; B. four brackets fixed in opposed pairs to said work support member with one pair being positioned adjacent each end thereof, each of said pairs diverging outwardly and downwardly from said support member in a common plane and such bracket having, 1. an outer face, 2. an inner face, 3. bottom and inner flanges extending outwardly of said outer face, and 4. pivot pin means fixed to and extending inwardly from said inner face; C. four legs for respective connection in opposed pairs of brackets, each of said legs having, 1. an upper end, 2. outer and inner faces, and 3. a longitudinal slot therethrough, positioned a predetermined distance inwardly from said upper end, for the reception of said pivot pin means therethrough, said slot having an upper and a lower end; D. retainer means fixed to each of said pivot pin means and loosely bearing against said inner face of each of said legs whereby each of said legs is retained in position on its respective pivot pin with the upper portion of said outer face thereof in bearing engagement against said inner face of said bracket, each of said legs being free to be pivoted on said pivot pins and to be slid longitudinally on said pivot pin a predetermined distance aS determined by the length of said slot; E. a first and a second yoke means fixed to each of said brackets and extending inwardly from the inner face thereof, each of said first and second yoke means providing an open throat sized to generally conform to the cross sectional size of said legs, each of said first yokes being positioned to slidably receive the upper end portion of one of said legs through said throat to hold said leg in an extended position with said pivot pin in contact with said lower end of said slot, each of said second yokes being positioned to slidably receive the upper end portion of one of said legs through said throat to hold said leg in a retracted position with said pivot pin in contact with said lower end of said slot, each of said legs being pivotal between said extended and retracted positions when said leg is slid on said pivot pin until said pivot pin is in contact with said upper end of said slot.

2. an inner face,

2. outer and inner faces, and

3. a longitudinal slot therethrough, positioned a predetermined distance inwardly from said upper end, for the reception of said pivot pin means therethrough, said slot having an upper and a lower end; D. retainer means fixed to each of said pivot pin means and loosely bearing against said inner face of each of said legs whereby each of said legs is retained in position on its respective pivot pin with the upper portion of said outer face thereof in bearing engagement against said inner face of said bracket, each of said legs being free to be pivoted on said pivot pins and to be slid longitudinally on said pivot pin a predetermined distance aS determined by the length of said slot; E. a first and a second yoke means fixed to each of said brackets and extending inwardly from the inner face thereof, each of said first and second yoke means providing an open throat sized to generally conform to the cross sectional size of said legs, each of said first yokes being positioned to slidably receive the upper end portion of one of said legs through said throat to hold said leg in an extended position with said pivot pin in contact with said lower end of said slot, each of said second yokes being positioned to slidably receive the upper end portion of one of said legs through said throat to hold said leg in a retracted position with said pivot pin in contact with said lower end of said slot, each of said legs being pivotal between said extended and retracted positions when said leg is slid on said pivot pin until said pivot pin is in contact with said upper end of said slot.

3. bottom and inner flanges extending outwardly of said outer face, and

4. pivot pin means fixed to and extending inwardly from said inner face; C. four legs for respective connection in opposed pairs of brackets, each of said legs having,

4. A sawhorse with retractable legs as defined in claim 1 in which each of said yokes comprises a first and a second arm and a span connecting the inner ends of said first and second arms with the outer ends of said arms being fixed to said bracket, said first and second yokes being positioned in an angular relationship relative to said legs whereby said first arm of said first yoke acts as a stop means to position said leg in the proper extended position when said pivot pin is in contact with said upper end of said slot, and said first arm of said second yoke acts as a stop means to position said leg in a proper retracted position when said pivot pin is in contact with said upper end of said slot, the upper end of said leg passing clear of said second arms of both the first and second yokes when being pivoted between said extended and retracted positions, and said leg being readily slidable into either of the throats of said first and second yokes when said leg is in contact with their respective first arm stop means.

5. A saw horse with retractable legs as defined in claim 1 in which said retainer means comprises a washer on each of said pivot pin means loosely bearing against said inner face of each of said legs and a spring retaining ring engaged in an annular groove adjacent the inner end of each of said pivot pin means, said spring retaining ring bearing against the inner face of said washer.