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Publication numberUS1846144 A
Publication typeGrant
Publication dateFeb 23, 1932
Filing dateJul 6, 1929
Priority dateJul 6, 1929
Publication numberUS 1846144 A, US 1846144A, US-A-1846144, US1846144 A, US1846144A
InventorsRisbridger Milton W, Risbridger William C
Original AssigneeMurry Irwin
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Trestle or saw horse
US 1846144 A
Abstract  available in
Images(3)
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Claims  available in
Description  (OCR text may contain errors)

Feb. 23, 1932. w. c. RISBRIDGER ET AL 1,346,144

TRESTLE OR.SAW HORSE Filed Jul s, 1929 s SheetsSheet 1 10 Earl g Q ip/ I c a C .D a .a

? INVENTOR W- C- RISER/055R M W- RISER/DEER ATTORNEY 1932- w. c. RISBRIDGEIR ET AL 1,846,144

TRESTLE OR SAW HORSE Filed July 6, 1929 3 Sheets-Sheet 3 .4 5 e Mm 2 0 a u a e E r m fiawnunq. O Q n I w w J N n 1 a :W G 2 2 4 m r n INVENTOR WILL/an c- RISER/DEER MILTON w RISER/DEER F. W, MW M ATTORNEY i legs partly folded together.

larged sectional view a of one end of the trestle, with the legs partly broken away, on

Patented Feb. 23, 1932 UNITED STATES PATENT OFFICE WILLIAM srenon-s or ONE-HALF TO Money mwm. or LAKEWOOD, omo

mnnsmm on saw nonsn Application filed July 6, 1329. Serial 110. $70,424.

sibility ofcollapsing when the trestle or saw horse is in use, and in the means for lower tially as herein shown and described.

In the accompanying drawings, Fig. 1 is a side elevation of the trestle or saw horse unfolded, legs folded, Fig. 3 is a bottom view of the device when folded as shown in Fig. 2. Fig. 4 is a transverse section of the device .unfolded, and Fig. 5 a similar view with the Fig. 6 is an enline 6--6 of Fig. 4. Fig. 7 is a cross section of the device taken on line 7-7 of Fig. 16.

tion corresponding to Fig. 8 is a bottom view, partly insection, on. line 8-.-8 of Fig. .6. Fi 9 is a cross sect on on line 9--9 of Fig. 6. Fig. 10.is a cross seclegsunfolded. Fig.11 is a perspective v ew of one of the legs. Figs. 12 and13 are. side and sectional views, respectivelm of a vertically adjustable attachment 3 for 1 supportmg thebar or beam,

The trestle or B--B pivotally the flat bottom face of bar or beam A. The separate sets of legs and brackets are identical in construction, and therefore a description of one will serve for the other, including the designating characters therefor. each attachment bracket C consists metal plate eyes 3 3 which are spaced apart. and contiltably confined.

ng or raising the main beamand permitting interchangeability of the parts, all substanand Fig. 2 is a similar view with the d Fig. 7, but showing the the trestle, and Fig.

a i p, the legs saw horse comprises a main 3 bar or beam A and two pairs of foldable legs hinged to metal brackets C-G which are secured by lag screws 2 to 11 extending inwardly beneath the beam Thusg" of a flat having two depending loops or.

tain circular openings beveled inner edges 4. A transverse loop or keeper portion 5 is also cast integral with the plate or bracket C intermediate the ends thereof opposite theloops or eyes 3 wherein a locking member D may be slidably and The legs Bare curved in different planes to provide. substantial spreading distances between the legs and so that the legs may be! inclined outwardly with. the sides of the beam and also inclined outwardly relatively totheends of the beam,

orts forthereby providing stable end sup the beam when thelegs are comp etely un folded. To permit each pair of legs to be folded closely together, and also folded substantially parallelfwith the beam, as shown in Figs 2, the legs are each provided with round tapering trunnions 6 which fit loosely within the open loops or eyes 3 and terminate in rounded hinged extremities 7--7 connectedtogether by a pivot pin 8 midway between the two loops or eyes, 3 3, see Fig. 7.

j The hinged extremities 77 have flat meeting faces on the medial line of the trunnions, and 1 the trunnions are rounded and tapered where they extend through the loops oreyes 3-3. Thus, the trunnions are v free to rock within the eyes to permit, thelegs mor folded and nnfolded with pin 8 as the axis of turning movement, .When the legs together, they ma be jointolded against the am,the

are folded closely ly rotated and having rounded or c. nrsnninonn m Mmron w. nrsnmnenn, or cnnvnnann, omo, as-

trunnions. being free to rotate within the.

. loops or eyes 3 3, However, the legs can only swing towards the center. of the beam during such folding movements, but when are unfolded and placed in the vertical inclined osition (shown inFig. 1) definite stop re ations are established between the legs and bracket plate G.

Each leg is a castinghaving a flatside wall or extensionIO adapted to overlap and clamp the flat side wall of beam A, and each leg also includes. an end wall or right-angled flangg an fore-shortened at its upper end to abut against plate C when the leg is fully extended or unfolded. This abuttin or stop portion 12 on the leg is widened an extends towards .see Fig. 9, and the opposite the slotted keeper portion 5 on bracket C to provide an overhanging lip on each leg having a bottom face 14, which is inclined outwardly and upwardly, see Figs. 9 and 11, to permit locking member D to interlock therewith. One end of locking member D is notched or curved to fit the beveled or inclined bottom faces of the lugs 12 on the legs, end of locking member D carries a setscrew 15 adapted-to engage the bottom of bracket C, whereby the locking member may be tilted ortrocked within its keeper 5 in clamping the parts together. In that event, the legs are rigidly secured to thebracket and the beam and can- I not be folded or unfolded. Moreover,'inapplying aclamping pressure by set screwl5 the locking member presses upwardly against the lugs or loops 12 on the legs, thereby tending to swing the flat side extensions 10 of'the legs against the flat sides of the beam.

' Accordingly, the lower supporting ends "of the legs will be spread apartandwill'be locked in that spreading relation. However, each pair of legs is further provided with a set of connecting links 1616 near their lower ends to limit the spreading movement of the legs and to relieve the strain on j tated into and' out of locking position'there by preventing the links from buckling when the flat clamping extensions 10 when the legs are unfolded. 'An additional locking result' is obtained by locking the links 16 16 when unfolded. Thus, an eccentric lever. 17 is mounted rotatably upon one link 16 opposite the concaved end'edge 18 of the other link 16, see Fig. 4.

lVhen the legs are unfolded and the links are straightened, the eccentric 17- may be rolocked together. 7

Preferably beam A is made of wood, and

the inner clamping-faces of the leg extensionls lO are provided with pointed spurs or "pro ections 19- adapted to penetrate the wood,

thus enhancing the clamping and bracing effeet betweenthei legs and the beam. .How-

ever, lbetween the leg'extensions 10, we may 'use" a separate supporting member 20 having ratchet teeth 21 on oppositesides'thereof,'see Fig. 12. In this case the upper ends of the clamping extensions the ratchet teeth, 7

member 20 maybe clamped and held at different elevations when the legs are unfold in lieu ofclainpingbeamQA' directly 10 are beveled to engage and the beam supporting ed or spread apart. The beam :may either rest within a concaved seat22 atthe top of ratchet member 20, or it may be secured withsocketfin ratchet member 20. A substitute in'a bifurcated holder 23 having a supporting stem 24 adapted to seat within a vertical holder 26 having diverging arms 27 may be used instead of holder 23, but in either 7 case the bar or beam A of the trestle ma be raised or lowered relatively to the foldable pro ections.

legs B-B, and suflicient forms of bars or beams used therewith for different purposes.

What we claim, is:

1. A trestle or saw horse, comprising a beam, brackets affixed to opposite ends of the beam havin depending loops, and separate pairs of f0 dable le'gs-having'trunnions pivotally connected to each other and rotatably confined within .the loops, of said brackets.

2. A' trestle or saw horse, comprising a beam, brackets aflixed to opposite ends of the pending loops, foldable legs having tapered trunnions pivotallyconnected together and 'rotatably confined within said loops, and means supported upon saidbrackets'for-locking said legs when unfolded.

I 4. A trestle-or sawhorse, comprisin' a beam, bracketssecured to said beam having depending portions provided with beveled openings, foldable'legs having roundtapered trunnions hinged together and rotatably confined within said beveled openings, and means for locking said legs rigidly when unfolded. 5. A trestle or saw horse, comprising a beam having brackets and foldable' legs rotatably connected to said brackets, said legs having beveled projections thereon, and a-locking member supported upon said brackets having clamping screws to effect interlocking between 'saidbrackets'and said beveled 6. A trestle or saw horse, comprisinga beam having foldable legsformed with round tapered'trunnio'ns having perforated extremities and pivotpins connectin said extremlties, and k S support saidbeam having depending loops adapted to rotatably confine movement of the trunnionstherein.

7. A trestle or saw horse, comprising a beamhaving legs pivoted thereto adapts to fold and unfold, including for said legs,-and an eccentriofor frictron'ally locking said links mountedupon one and cooperatingw-ith the other of saidlinks.

:8. A trestle or sawhorse, comprising a beam, folding legs hinged togetherand-rotatably connected to said beam, foldable connecting links for'said legs, one ofsaid links having a concaved edge, and a rotatable-cc:

centric mounted onthe-other link opposite saidedge. j 9..A"trestle or sawhorse,*-compris1ng a beam, separate PiLlIS 'of legs hav1'ngclampy ing extensions for said beam and-having their legs pivotally connected -with' each other,

saidtrunnions and to promote arooking connecting links brackets afiixed to said beam having depending portions rotatably connected with said legs, stop lugs on said legs adapted to engage said brackets, and locking members mounted 11113011 said brackets and engageable with said ugs.

10. A trestle or saw horse, comprising a beam, a bracket afiixed to each end of said beam having depending loops, and a slotted keeper opposite said loops legs having round tapered trunnions exten in through said loops and pivotally connecte at their meeting extremities, said legs having stop lugs engageable with said bracket and slidable, tiltable locking members confined within said keeper and engageable with said lugs.

11. A trestle or saw horse, comprising a beam, ratchet devices for supporting said beam, and foldable legs pivotal y connected with each other adapted to clamp said ratchet devices therebetween.

12. A trestle or saw horse, comprising foldable legs pivotally connected with each other, a socket member adapted to be clamped by and between said legs, and a beam supporting member removably seated within said socket member.

13. A trestle or saw horse, comprising a beam, forked holders for said beam, supporting members for said holders, and separate foldable legs pivotally connected with each other adapted to clamp said members at different elevations therebetween.

In testimony whereof we afiix our signatnres.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2639197 *Mar 11, 1950May 19, 1953Chelsea James LPortable sawhorse
US4190283 *May 22, 1978Feb 26, 1980Hedstrom Co.Foldable play gym
US4570752 *Jan 22, 1985Feb 18, 1986Chapman Richard EFoldable saw horse
US5125478 *Feb 14, 1991Jun 30, 1992Henningsen Ralph JFolding sawhorse
US5192046 *May 29, 1991Mar 9, 1993Steelcase Inc.Processor support
US7770344Oct 3, 2007Aug 10, 2010Cooper Technologies CompanyUnder-floor cable support system
Classifications
U.S. Classification182/155, 182/186.2, 16/368, 248/173
International ClassificationB25H1/06, B25H1/00
Cooperative ClassificationB25H1/06
European ClassificationB25H1/06