Патент USA US2404533код для вставки
July 23, 1946.‘ _ '. E. w.‘ R‘ODGERS ET-AL ’ 2,404,533 ' SACK ‘LIFTER ‘.Filed Nov.- so, 1945 INVENTORS ,. I \ I’ ATTORNEY Patented July 23,‘ 1946 2,404,533 v-ul\u7rr.l> STATES PATENT OFFICE ' SACK LIFTER Frederick W. Rodgers, ,Pacoimarand Alvan M. Palmer, Los‘ Angeles, Calif. v Application November 30, 1945, Serial No. 631,990 ' I . 1 Claim. (01.29.4-1) 1 ‘2 This invention relates to a device for facilitat ing the handling of sacks or bags of wheat, bar member. The axis of curvature of the concave face I | parallels the bottom edge l2 and the con cave'face || preferably represents an angle of ley, other grains, and. various pulverulent or gran ular materials. Grain and various other granular materials are often shipped and handled in bags. These bags may weigh from 90 lbs. each to as high as 150 lbs. Many of the sacks or bags are made of rotation or generation of not less than 60° nor more than 90°. , The backing member also includes a substan tially ?at upper portion l5 from which exten sions l6 and I1 extend upwardly in parallel, > ‘spaced relation. The upper ends of these exten: sions may be connected by means of a cross piece workers handling the bags are not only subjected It; around which a hand grip I9 is fastened or to a great deal of strain but, in addition, often formed. or the hand grip I9 may connect the up suffer abrasions and loss of skin from the areas per ends of the extensions l6 and, I1. Reenforc of the wrists immediately above the palms of the ing ribs 20 may be formed in the backing mem hands, due to frictional and abrasive movement of the sacks against such areas while the bags 15 ber and extend into the extensions Hi and IT. Ad ditional reenforcing ribs may also be formed in are being handled. The present invention is di othersections of the upper and lower portions rected to a sack lifter which facilitates the work l5 and | | of the backing member. The ribs, such of lifting, arranging, stacking, or otherwise mov as 20, preferably extend rearwardly (from the ing heavy and awkward bags of granular mate rial. 20 convex surface of the bottom portion), thereby presenting a minor depression on the concave An object of the present invention is to dis or front surface of the backing member, close a sack lifter which may be quickly and A sheet of relatively thin metal provided with readily applied to a sack so as to permit such .a large number of punched out, integral, rigid, sack to be lifted, raised and moved without dis comfort and without causing the workers’ hands 25 sharp teeth is attached to the concave faceof the lower portion of the backing member. ‘Such sheet or wrists to rub against the sack. is indicated at 2|, and it will be noted that the A further object of the invention is to provide lower portion of such sheet is provided with a a device which not only facilitates the lifting and large number of triangular, punched out teeth manipulation of heavy sacks but does not damage 30 22, 23, and the like. These teeth are preferably the sacks during such handling. punched out of the sheet metal 2| by suitable A still further object is to provide an arrange dies while such sheet is ?at and then the punched ment and combination of elements whereby sacks out sheet is bent to the curvature imparted to the may be readily lifted and the devices disengaged backing member and either riveted or welded to from the sacks in an effective manner Without damaging the sacks. C: (it the concave front face of the backing member. The tooth-bearing face sheet 2| may be remov An object of the invention also is to provide ably attached to the backing as by means of an inexpensive, simple construction which per- ' machine screws. Thin sheet steel has been suc mits effective sack liftingdevices to be manu cessfully used for the toothed facing 2|. factured economically. ‘ ' It will be noted that the various teeth 22, 23, These and other objects of the invention will and the like are only formed in that area of the become apparent from the following description. facing 2| which covers the curved lower portion In such description reference will be had to the | | of the backing member. The upper portion appended drawing, in which: of such facing 2| and particularly that area which Fig. 1 is a front view of one of the sack lifters is located between the curved lower portion, the made in accordance with the present invention, extensions “5 and I‘! and the hand grip opening, portions thereof being broken away. _ is-left plane or flat as indicated at 24 and pro- ' Fig. 2 is a side elevation of the device. burlap or other coarsely woven material and the Fig. 3 is a sketch illustrating one manner of use of such device. vides a bearing area or surface. face which is contiguous to the bottom edge l2 bag is readily lifted, the various teeth penetrat - In use, a pair of sack lifters is grasped by th The device of the present invention generally 50 handles or hand grips and the lower edges I! are inserted beneath the sides of a'bag. When consists of a backing member l0 comprising a an upward pull is exerted upon the handles, the lower, curved portion || presenting a concave ing the bag or sack and ?rmly holding such sack tween the side edges l3 and H of the backing 65 upon the devices. When it is desired to release of the member. The concave face extends 'be- » 2,404,533 3 the bag, it is only necessary to bring the hand ‘ grips IQ of the two devices toward each other, the bearing area 24 resting against the side of the bag and acting as a lever point which facili . 4" comprising a lower curved portion presenting a concave face contiguous to‘ the bottom edge of such member and a substantially ?at upper por tion; a pair of spaced extensions extendingup wardly from the upper portion of the backing member; reenforcing ribs formed in the lower ' sirable to have the hand grips positioned with and upper portions; a hand grip carried by the their axes substantially parallel to - the bottom extensions, the ‘axis of the hand grip virtually paralleling the bottom edge of the'backing mem edge l2 of the device. The teeth 22 and 23 should be rigid and may vary from approximately %" in 10 ber; and a sheet of relatively thin metal provided length to 1/2" in length. They should be smooth. with a large number of punched out, integral, tates the withdrawal of the teeth from the bag. In actual practice, it has been found highly de and free from burrs so as not to rip or pull the ‘ ' rigid, sharp teeth, such sheet being attached threads of the bag material. The overall height to the concave face of the lower portion of the of the device from the bottom edge to the top of backing, member, said backing member ‘and sheet the hand grip may vary from 14 to 16 ‘inches so 15 presenting a virtually ?at, toothless, bearing area . as to place the hand grips above the upper sur above the concave face and between the exten face of the sack being lifted, ' ' ‘ ' sions and hand grip. We claim: FREDERICK W. RODGERS. A sack lifter consisting of : a backing member~ ALVAN M. PALMER.