US2648521A

US2648521A - Hoist

Info

Publication number: US2648521A
Application number: US147176A
Authority: US
Inventors: Charles M Sales
Original assignee: Individual
Current assignee: Individual
Priority date: 1950-03-02
Filing date: 1950-03-02
Publication date: 1953-08-11
Anticipated expiration: 1970-08-11

Description

C. M. SALES Aug. 11, 1953 I-IOIST Filed March 2, 1950 Patented Aug. 11, 1953 UNITED STATES PATENT OFFICE HOIST Charles M. Sales, Seymour, Iowa Application March 2, 1950, Serial No. 147,176

6 Claims. 1

The principal object of my invention is to provide a hoist that is well adapted for use in an area. that is limited in Width.

. Itisa further object of my invention to provide ahoist using a jack as the lifting element; said jack being readily demountable to serve other purposes.

- Astill further object of my invention is to provide ahoist frame having a jack aligning arrangement thereon so that the mounting of the jack in frame. in the most advantageous position may beeasily accomplished.

An additional object .of my invention is to pro vide a hoist using a jack as the lifting element and, having the movable portion of the jack extending beyond, the top plane of the hoist frame.

'A still further. object of my invention is to provide a hoist that is economical to manufacture and durable in .use.

These and other objects will be apparent to those skilled in the art.

My invention consists in the construction, arrangement, and combination of the various parts of the, device, whereby the objects contemplated are attained as hereinafter more fully set forth, pointed out in my claims, and illustrated in the accompanying drawings, in which:

Fig. 1 isa rear view of my device with the jack in an extended position and having lifted one end of a farm wagon box a portion of which is also shown.

Fig. 2 is a cross-sectional view of my device and a farm wagon, box fragment taken on the line 22 of Fig. 1.

Fig.3. is an. exploded view of the top portion'of my hoist that more fully illustrates the structure.

Fig. 4 is'a cross-sectional view of my device taken on the line 44 of Fig. 1 which shows the radial off-set of the J'ackmember so that the operating handle will clear the frame.

In the. drawings the numeral l8 designates the A frame of my hoist that has a shelf Ii rigidly secured to the center frame crossbars l2. The shelf supports the base of the jack when it is mounted in the frame and has two aligning bosses i3 extending upward from the shelf ll. These bosses are arranged on the shelf so that when the boss matching wells It in the base of jack are fitted on the bosses, the jack is radially off set as shown in Fig. i to cause the operating handle it to clear the side of frame Iii. When the jack i5 is fitted into place, it is secured at the top by collar ll engaging the top of the body portion of jack 15 leaving the movable lifting element iii of the jack extending beyond the top plane of the frame. Collar IT is detachably secured to the top of frame Ill byany suitable means such as bolts H] or the like. Pulley bracket 20 carries pulleyv 2| journaled in it and has a well in its bottom that slidably, detachably, embraces the top of jack member l8. Rigidly secured to frame I!) between shelf I2 and collar I1 is a brace member 22 which has an extreme obtuse angle formed therein to avoid interfering with jack l5. Brace 22 forms an anchor point for one end of angle member 23, its other end being secured to shelf l 2. by welding or the like. The holes-24 in angle member 23 provide a vertically variable securing means for adjusting hook 25 that is secured to one end of flexible member 26. From its anchor point, flexiblemember 26 is reevedover pulley 2| and is secured to lifting hook 21. The folding leg 28 is hingedly secured to brace 22 so that it will lie fiat against frame i ll when the hoist is in use as shown in Fig. 1. When the hoist is not in use and is tilted rearwardly, howevenleg 28 will swing out to make,

with the two fixed legs, a tripod so that the hoist.

becomes self supporting.

In using my hoist to raise any object to be lifted the movable element [3 of the jack i5 is lowered as far as possible so hook 2! may be secured to the object to be lifted and any slack in the flexible element 26 is removed or reduced by the location of adjusting hook 25 in the appropriate one of holes 24, By operating the jack to extend element IS the book 2'! and its load 29 such as one end of a wagon box or the like is raised to the desired height, within the limits of operation of my hoist. It will be noted that the flat construction of my frame permits the use of my hoist in areas confined as to one lateral dimension. This permits its use in lifting wagon boxes without disconnecting the wagon from the drawing vehicle.

It will also be noted that the jack is not new but that a means is provided in the frame for quickly and accurately relocating the jack in the most advantageous position as shown in Fig. 4. It is this aligning means which makes the removal a replacement of the jack efficient that is one inventive thought in my improved hoist. My simplified structure for the frame and use of the lifting element of the jack directly as a raising boom with the pulley element mounted directly thereon is also believed new. The jack may obviously be easily removed for repair purposes if that is necessary. Similarly a substitute jack may be used in the meantime thus reducing loss of use of my hoist to a minimum.

some changes may be made in the construction and arrangement of my hoist without departing from the real spirit and purpose of my invention, and it is my intention to cover by my claims, any

modified forms of structure or use of mechanical equivalents which may be reasonably included within their scope.

I claim:

1. In a hoist, an A-frame open at the top, an elongated shelf secured to the center cross member of said A-frame, jack positioning bosses rigidly secured to said shelf, a jack having a base having wells therein constructed and arranged to register with said bosses and having its lifting portion extending above the top of said A-frame; said bosses and the wells in said jack base arranged to laterally secure the base of said jack and to off-set said jack radially in said A-frame so that the operating handle of said jack will avoid said A-frame, a collar disposed across the open top of said A-frame and having a center opening designed to detachably embrace the top of said jack base and having each of its sides detachably secured respectively to each of the two top members of said A-frame, said jack having an extensible lifting portion, a pulley wheel detachably secured on the top of said lifting portion, a hook, a flexible member reeved over said pulley wheel and having one end vertically and adjustably secured to said frame, the other end of said flexible member secured to said hook, and a leg hingedly secured to said frame designed to lie flat against said A-frame When said hoist is in operation and act as tripod leg for making said hoist self-supporting when not in use.

2. In a portable hoist comprising an upstanding prop form body portion having side members spaced apart at their upper ends and providing laterally spaced supporting surface-engaging base portions, a cross member connecting said side members intermediate the ends of the latter; a removable jack unit including a base-providing housing, a lineally extensible lift element working in said housing and an actuating means for the lift element; interengaging and lateral shift-preventing seating means for said jack provided by said jack-housing base and said cross member and comprising interfitting boss and socket means, said interengaging means disposing said jack-housing so that the lift element-actuating means of the jack is clear of said side members of the hoist body, a removable side member-connecting cap at the upper end of said jack housing, said cap overlying in close adjacency at least a portion of the upper end of said jack housing to retain said boss and socket seating means in engagement, and said cap member providing a guide opening for said extensible lift element.

3. In a portable hoist comprising an upstanding prop form body portion having side members spaced apart at their upper ends and providing laterally spaced supporting surface-engaging base portions, a cross member connecting said side members intermediate the ends of the latter; a removable jack unit including a base-providing housing, a lineally extensible lift element working in said housing and an actuating means for the lift element; lateral shift-preventing jack base-seating means provided by said cross member and with which said jack base is engageable only from above, and removable means connecting said side members adjacent their upper ends, said removable means overlying in close adjacency the upper end of said jack housing to retain its base on said seat, said jack housing being positioned on said seat to dispose said lift element-actuating means clear of the hoist body side members.

4. A hoist comprising a main body portion, a transverse shelf on the main body portion below the top thereof, a jack seated on said shelf, said jack having associated with it an elongated rigid lifting means longitudinally movable through the top of said main body portion, a depending propproviding leg carried by said body portion intermediate its ends and swingable outwardly in a plane normal to the plane of said body portion whereby to cooperate with said body base to support said body portion in substantially upright position as, for instance, when the hoist is not in use, and said leg adapted to lie substantially flat against said body portion when not in use.

5. A hoist comprising a main prop form body portion having side members, cross members spaced in the direction of the length of said side members and connecting the same, one of said cross members providing a jack supporting shelf, a jack removably positioned on said shelf and having lifting means extending above the top of said prop form body portion, a depending propproviding leg carried by one of said cross members and hingedly connected thereto for swinging movement outwardly in a plane normal to the plane of said body portion whereby to cooperate with the lower end of said body portion to support the same in substantially upright position as, for instance, when the hoist is not in use, and said leg adapted to lie substantially flat against said body portion when out of use.

6. In a hoist, an A-frame open at the top, an elongated shelf secured to the center cross member of said A-frame, jack positioning bosses rigidly secured to said shelf, a jack having a base and wells therein constructed and arranged to register with said bosses and having its lifting portion extending above the top of said A-frame; and said bosses and wells in said jack base arranged to laterally secure the base of said jack and to off-set said jack radially in said A-frame so that the operating handle of said jack will avoid said A-frame.

CHARLES M. SALES.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 2,214,440 Rothery Sept. 10, 1940 2,474,045 Freeland June 21, 1949 2,543,210 Wagstaff Feb. 27, 1951 2,549,996 Walsh Apr. 24, 1951 2,605,998 Beck Aug. 5, 1952