US2588749A - Transportable lifting device - Google Patents

Description

March 11, 1952 sso 2,588,749

TRANSPORTABLE LIFTING DEVICE Filed Jan. 20, 1950 Iuvem-ok',

Nuu; ER: Nussou Patented Mar. 11, 1952 UNITED STATES ATENT OFFICE TRANSPORTABLE LIFTING DEVICE Nils Eric Nilsson, Mockeln, Sweden Application January 20, 1950, Serial No. 139,601

a In Sweden November 11, 1946 3 Claims. (01. 254-439) 1 2 The present invention relates to a transporting studs l2 which prevent slipping of the standable lifting device of the type having a frame ard during use by engagement with the ground. supporting a rotatable cable drum for a cable When using the device the lifting means 4 is passed over a return pulley, said frame consistsecured to the part to be lifted (the log 5) and ing of a standard which may be placed with one 5 the device is erected directly adjacent the seend on the ground in unstable upright position curing point. The operator grasps the handle and which has a handle by means of which said It with his one hand and holds the device in standard may be braced with one hand during upright position while turning the crank l with the lifting operation. his other hand so that the cable lifts the log 5.

The principal object of the invention is to pro- Since in the embodiment described, the point vide a special embodimentof such known liftwhere the foot end lb is supported on the ground ing devices which considerably facilitates the will be situated approximately in the prolongahandling of the lifting device. tion of the portion of the cable 3 extending be- These and other objects and advantages of the tween the return pulley 2 and the lifting means invention will be clear from the following de- 4 a ry small force will be necessa y to hold tailed description of an embodiment shown as an the device in upright position by means of the example only in the accompanying drawing in handle l0 and in spite thereof there is no risk whi h; that the log 5 will slide against and possibly come Fig, 1 hows a side 1 ati of th lifti into contact with and get caught on the standard vice, and 0 l during lifting.

Fig. 2 a rear elevation thereof. What I claim and desire to secure by Letters Referring to the drawing, the liftin device Patent is: comprises a standard I which is constructed as a 1. A transportable lifting device comprising a trestle with two tubular legs having an upper standard, a straight cross bar on the foot end end la and a foot end lb. The upper end la supof said standard, a handle on said standard ports a return pulley 2 for a cable 3, the one free adapted for enabling an operator to brace said end of which supports a lifting means 4shown standard with one hand during use in unstable here in the form of a pair of tongs for lifting logs upright position with said cross bar on the foot 5and the other end of which is wound around end of said standard resting on a support and and attached to a cable drum 6 which is manualallowing swinging movements of said standard 1y rotatable by means of a crank l for a customaround said cross bar, the upper end and the foot ary gearing 8 with a latch pawl 9. The winch end of said standard being bent in the same diunit formed by the parts 6 to 9 is fixed approxirection from a substantially straight intermedimately at the middle of the standard I, and above ate portion of said standard in a plane at right said unit there is a handle l0 which the operator 5 angles to said cross bar, a cable drum mounted maygras'p with one hand to hold the lifting defor rotation on said intermediate portion of said vice balanced in unstable upright position durstandard with its axis of rotation at right angles ing use. to the plane of said bent standard ends, a return As appears from Fig. 1, the intermediate porpulley mounted for rotation on said upper standtion of the standard I is straight while the upper 40 ard end with its axis of rotation at right angles end la is bent towards the side remote from the to the plane of said bent standard ends, a cable Winch unit 6 to 9 and the foot end lb thereof is so having one end thereof attached to said cable bent in the same direction as the upper end la drum and the other end thereof being passed that the place where the standard stands on the over said return pulley, and a manually operground (or other support),when the straight ini5 able crank for rotating said drum, the axis of termediate portion of the standard I is held ver- IOtatiOII 0f Said crank t ing at right an tical, is situated approximately directly below the to the planeof said bent standard ends. return pulley 2. The arrangement is such that A t a ta l ft n d vice mprisin a the axes of rotation of both the cable drum 6 and Standard, & St cross bar 0n t e i001? end of the return pulley 2 are at right angles to the said standard, ahandle on said standard adapted plane of the bent standard ends la and lb. As for enabling an operator to brace said standard best shown in Fig. 2, the foot ends lb of the tuwith one hand during use in unstable upright. bular legs forming the standard I diverge slightly po ition with said cross bar on the foot end of from each other in downward direction and are said standard resting on a support and allowing connected by means of a transverse bar ll havswinging movements of said standard around said cross bar, the upper end and the foot end of said standard being bent in the same direction from a substantially straight intermediate portion of said standard in a plane at right angles to said cross bar, a cable drum mounted for rotation on the side of said intermediate standard portion remote from said standard ends with its axis of rotation at right angles to the plane of said bent standard ends, a return pulley mounted for rotation on said upper standard end with its axis of rotation at right angles to the plane of said bent standard ends, a cable having cross bar, a cable drum mounted for rotation on said intermediate portion of said standard with 3 its axis of rotation at right angles to the plane of. said bent standard ends, a return pulley mounted for rotationon said upper standard end with its axis of rotation at right angles to the plane of said bent standard ends, a cable having one end thereof attached to said cable drum and the other end thereof being passed over said return pulley, said cross bar being situated on the same 'side of a plane that is parallel with said interone end thereof attached to said cable drum and the other end thereof being passed over said return pulley, and a manually operable crank for rotating said drum, the axis of rotation of said said standard resting on a support and allowing swinging movements of said standard around said cross bar, the upper end and the foot end of said standard being bent in the same direction from a substantially straight intermediate portion of said standard in a plane -,at right angles to said mediate standard portion and touches said return pulley on the side remote jrom said intermediate standard portion, and'a manually operable crank for rotating said drum, the axis of rotation of said crank extending at right angles to the plane-ofwaid'benirstandard-ends.- r

'Nnls ERIC NTLssoN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 178,854 Hydeiiu u'; June 20, 1876 660,137 "Wenzelmann Oct. 23, 1900 807,878 Soper Dec. 19, 1905 Bjornlie Jan. 4, 1921

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