US3226089A

US3226089A - Portable winch drum hoist

Info

Publication number: US3226089A
Application number: US346776A
Authority: US
Inventors: Patz Paul
Original assignee: Individual
Current assignee: Individual
Priority date: 1964-02-24
Filing date: 1964-02-24
Publication date: 1965-12-28
Anticipated expiration: 1982-12-28

Description

Dec. 28, 1965 P. Pm 3,226,089

PORTABLE WINCH DRUM HOIST Filed Feb. 24, 1964 2 Sheets-Sheet l "37a 5 5' 0 M fi 24 '1 3 27 y o 1 37b 37 I; 30

o If. 3 I [4b 3a 3 76 K w! 9 (MW L ii l f E /a INVENTOR. PA U L PA TZ Dec. 28, 1965 z 3,226,089

PORTABLE WINCH DRUM HOIST Filed Feb. 24, 1964 2 Sheets-Sheet 2 INVENTOR. PA U L PA TZ Arromvsv United States Patent 3,226,089 PORTABLE WINCH DRUM HOIST Paul Patz, Pound, Wis. Filed Feb. 24, 1964, Ser. No. 346,776 3 Claims. (Cl. 254-145) This invention relates generally to power hoists and in particular to a small, portable hoist of the type having a winch drum which can be readily attached to an electric drill as a source of power.

The present invention provides an improved hoist of the above type to which drills of various sizes can be easily and quickly attached; the hoist has convenient means for holding the winding drum in any desired position; the drive chain between the drive reduction sprockets can be easily assembled and adjusted; and the entire hoist can be readily mounted into or moved between different operation locations.

A more specific object of the invention relates to a portable hoist which has an improved frame including a pair of transversely spaced angle brackets at its lower end which can be simply set on a horizontal support, such as the rung of a silo ladder, for example, where it will support a portion of the weight of the hoist and its load and will also be urged firmly in a horizontal direction into abutting engagement with the horizontal support; a tension member then detachably connects the other end of the frame to an upper support for supporting the remainder :of the load. As a result, the entire hoist can be quickly and easily moved to any one of a number of positions.

In general, the present invention provides a hoist which is compact, highly portable, easily adjustable, and efficient in performing the functions for which it was designed.

These and other objects and advantages of the present invention will appear hereinafter as this disclosure progresses, reference being had to the accompanying drawings, in which:

FIGURE 1 is a perspective view of a hoist embodying the present invention, certain parts being shown as broken away;

FIGURE 2 is a View similar to FIGURE 1, but taken from the other side of the hoist;

FIGURE 3 is a perspective view of the hoist shown in FIGURES 1 and 2, but taken more from the rear of the hoist and on a slightly enlarged scale, and showing a drill and its attaching parts in exploded view; and

FIGURE 4 is a perspective view of the brake arm as shown in FIGURE 3.

Frame Referring in greater detail to the drawings, the hoist includes a main frame F including a main support member 1 having a cross bar 2 welded across its lower end, and bar 2 has brackets 3 welded to each of its ends. The brackets are of right-angular shape and can conveniently and readily be set, for example, on a rung 4 (FIGURE 1) of a silo chute ladder. When in the operating position as shown in FIGURE 1, the horizontal arm 3a of the bracket 3 rests on the top of the rung and supports a portion of the weight of the load. The vertical leg 3b of the brackets bears firmly against the ladder rung when the hoist is in operative position. It will be noted that no special attaching clamps or tools are required to set the hoist in place. Thus, the frame, with the laterally spaced angle brackets 3 secured at one end of the frame, is adapted to set on and abut against a horizontal support, such as the rung of a ladder.

The frame also includes a generally horizontal, tubular member 5 which is welded to the upper end of the inclined member 1. A tension member in the form of a chain 6 is fastened at one end to a ring 6a that is welded to 3,226,989 Patented Dec. 28, 1965 "ice member 5. The chain extends from the member 5, and its other end is adapted to be looped around another upper rung 7 (FIGURE 3) of the ladder and held fast by a hook 8 on the end of the chain which takes a bite of the chain as at 9 to thereby secure the frame in place on the ladder. Thus, flexible member 6 can be conveniently attached to various locations above the frame, such as the rungs of a ladder, and is placed under tension when supporting the hoist.

The frame of the hoist is inclined and extends upwardly and outwardly from the lower end of the frame which has the angle brackets, and the entire hoist can be readily attached to and removed from any one of a number of different locations.

Drum and mounting A cable or strand drum 10 is rotatably supported on its shaft 11 which is located beneath and parallel to tubular member 5. Shaft 11 is rigidly supported by a downwardly extending angle iron arm 12 which is welded at its upper end to member 5 and has a sleeve bearing 13 adjustably fixed at its lower end. More specifically, the sleeve bearing 13 is welded to an upwardly extending plate 14 (FIGURE 2) having a slot 15 therein. A bolt means 16 extends through arm 12 and the slot in plate 14 and thereby rigidly holds arm 12 and plate 14 together and consequently holds the sleeve in any one of a number of vertical positions relative to the frame. Opposite side guide members 14a and 14b are welded to opposite sides of plate 14 and act to prevent sidewise twisting of the plate 14 relative to the arm 12, that is, they hold these parts in alignment.

In this manner, the distance of the drum shaft 11 can be varied with respect to upper sleeve member 5.

The cable drum 10 is comprised of an inner end wall 17 and an outer end wall 18 which are both welded to the shaft 11. Wall 18 is actually a relatively large sprocket having a series of teeth around its periphery, say 52 in number, and thus the sprocket serves the dual function of a sprocket and as an end wall of the drum itself. A locking collar 19 is fixed to the other end of shaft 11 to hold it captive in the sleeve bearing.

A cable guide 20 is welded to the frame and has a closed loop portion 20a through which the cable extends for being guided thereby.

The lower end of the cable has a compound hook H for attachment to articles to be hoisted.

A drive shaft 24 rotatably extends through the upper sleeve member 5. A relatively small sprocket 27, for example, with 12 teeth, is fixed on the end of shaft 24, and a roller chain 30 is tautly trained over

sprockets

18 and 24 for drivingly connecting them together. Assembly of the chain drive and the tautness adjustment of the chain are provided for by the adjustable plate 14 which permits variation in distance between the centers of the parallel and horizontally disposed shafts 11 and 24.

Drum holding means Brake means are also provided for releasably holding shaft 24 from rotating and take the form of a V-pulley 32 which'is fixed to shaft 24 and a portion of a V-belt 33 which wraps partially around the pulley. One end of the belt is securely anchored by bolt means 34 to a bracket 35 fixed on the frame. The other end of the belt is spring biased to a tightly wrapped position around the pulley by means of a spring 36. Spring 36 is also anchored at one end to the bracket 35, andits other end is fixed to the free end of the belt by an intermediate, curved arm 37. Arm 37 is pivoted by its transverse pivot shaft portion 37a (FIGURE 2) which is oscillatable in a small sleeve 38 welded to the larger sleeve member 5.

The spring normally holds the belt tightly around the pulley and thus locks the drum against rotation. The brake means is located on the drive shaft, and this together with the mechanical advantage provided by the relatively large and small sprockets provides a very effective and eflicient brake means.

To release the drum, it is only necessary to manually press a handle portion 37b of arm 37 in a downward direction and thus pivot it about its pivot shaft portion 37a, and this extends the spring and unwraps the belt sufficiently from the pulley to free the pulley and its shaft for rotation.

The particular V-belt and V-pulley brake means form a braking means of considerable holding capacity for any given size of brake, and it is readily operable. The brake is located directly on the drive shaft and ahead of the mechanical advantage sprockets of the hoist and as a result is particularly effective.

Drill mounting The electric drill D (FIGURE 3) may be of conventional character and of different sizes. A drill known as a one-half inch drill has proved to be very satisfactory and capable of hoisting a 300-pound load with the device above described. The drill is quickly and easily mounted on the frame as follows:

A socket member 40 is rigidly secured to the other end of shaft 24 and has a non-circular in cross section opening 41 in its end. The chuck 42 of the drill may have a plug 43 chucked therein which has an end, for example, hexangular in cross section, that complements and drivingly fits in the opening 41 in the socket member 40. A quick detachable slip-joint drive is thereby formed between the co-axially arranged drive shaft and drill.

A clamp member also helps support the drill on the frame and comprises a tube 51 adapted to telescope on a rod 52 that extends rearwardly from and is welded to the free end of bracket 35. The member 51 is rigidly fixed in any adjusted position along rod 52 by a set screw 53 threaded therein. In this manner, various sizes of drills can be readily accommodated with this means of drill support.

A C-clamp 54 is welded to the end of tube 51 and has a nut means 55 extending through its bifurcated end for permitting the clamp to be tightly engaged on a rod 60 which extends rigidly from the drill. In this manner, the drill D can be secured to the clamp, the slip-joint drive connection established, and the clamp then locked in position.

To attach or remove the drill, it is only necessary to tighten or loosen the bolt means 55 of the clamp and respectively insert or remove the plug 43 in the opening 41 of the socket member.

Various modes of carrying out the invention are contemplated as being within the scope of the following claims particularly pointing out and distinctly claiming the subject matter which is regarded as the invention:

1. A compact and portable hoist comprising, a main frame having a pair of laterally spaced angle brackets secured at one end and adapted to set on and abut against a horizontal support, said frame extending upwardly and outwardly from said brackets, a tension member fixed to the other end of said frame and extending therefrom to partially support the hoist, a drive shaft rotatably mounted on the other end of said frame and extending normally to said horizontal support, a drum shaft rotatably mounted on and adjacent said other end of said frame, a winding drum fixed to said drum shaft, a driving connection between said shafts, means for adjusting the distance of said drum shaft relative to said drive shaft for adjusting said driving connection, said frame having means for mounting an electric drill on said frame whereby said drill is located generally over said one end of said frame, and means forming a quick detachable driving connection between said drill and said drive shaft.

2. A hoist as defined in claim 1 including a V-pulley fixed directly to said drive shaft and a V-belt trained partially therearound and anchored at one end to said frame, a bracket having a pivotal mounting on said frame, a spring connected at one end to said bracket and at the other end to the other end of said V-belt, whereby said bracket can be manually depressed about its pivotal mounting thereby causing extension of said spring and consequent release of said drive shaft.

3. A hoist as set forth in claim 1 including an adjustable clamp on said frame for facilitating connection of said driving connection and for holding said drill in driving relationship with said drive shaft whereby drills i of various sizes can be accommodated.

SAMUEL F. COLEMAN, Primary Examiner.

Claims

1. A COMPACT AND PORTABLE HOIST COMPRISING, A MAIN FRAME HAVING A PAIR OF LATERALLY SPACED ANGLE BRACKETS SECURED AT ONE END AND ADAPTED TO SET ON AND ABUT AGAINST A HORIZONTAL SUPPORT, SAID FRAME EXTENDING UPWARDLY AND OUTWARDLY FROM SAID BRACKETS, A TENSION MEMBER FIXED TO THE OTHER END OF SAID FRAME AND EXTENDING THEREFROM TO PARTIALLY SUPPORT THE HOIST, A DRIVE SHAFT ROTATABLY MOUNTED ON THE OTHER END OF SAID FRAME AND EXTENDING NORMALLY TO SAID HORIZONTAL SUPPORT, A DRUM SHAFT ROTATABLY MOUNTED ON AND ADJACENT SAID OTHER END OF SAID FRAME, A WINDING DRUM FIXED TO SAID DRUM SHAFT, A DRIVING CONNECTION BETWEEN SAID SHAFTS, MEANS FOR ADJUSTING THE DISTANCE OF SAID DRUM SAHFT RELATIVE TO SAID SRIVE SHAFT FOR ADJUSTING SAID DRIVING CONNECTION, SAID FRAME HAVING MEANS FOR MOUNTING AN ELECTRIC DRILL ON SAID FRAME WHEREBY SAID DRILL IS LOCATED GENERALLY OVER SAID ONE END OF SAID FRAME, AND MEANS FORMING A QUICK DETACHABLE DRIVING CONNECTION BETWEEN SAID DRILL AND SAID DRIVE SHAFT.