US2203118A - Automatic elevator - Google Patents

Description

June 4, 1940. H. E. WILLIAMS AUTOMATIC ELEVATOR Filed Jan. 51, 1938 I/V VE/V TOR. flow/mn- E. W/u. 0W3.

' Patented June 4, 1940 UNITED STATES PATENT OFFICE AUTOMATIC ELEVATOR Howard E. Williams, Huntington. Park, Calif. Application January 31, 1938, Serial No. 187,913

4 Claims: (01. 294-90 10 Another object, is to provide an automatic elevator which can be reversed in position so as to engage either the up-set type of pipe or pipe having collars thereon. v

Still another object is to provide anauto- 15 matic elevator of the character stated in which the jaws can be quickly andeasily released, for the purpose of disengaging the pipe by means: of

' v conveniently placed plungers'.

A feature of my invention'resid'es in the novel 20 means of transferring theloadof the pipe from the gates to the body of the elevator, and another feature resides in the complete encircling of the pipe by the jaws while the pipe is being moved.

Other objects, advantages and features of invention may appear from the accompanying drawing, the subjoined detailed description and the appended claims.

In the drawing: 30 Figure llis a top plan view of my elevator.

Figure 2 is a transverse sectional view of the same. I I

Figure 3 is a front elevation of the elevator. Figure 4 is an end view of the same.

5 Referring more particularly to the drawing, the numeral I indicates the body of the elevator, which includes a pair of outwardly extending ears 2, 3, which receive the links (not shown) It is to be noted that the body I is symmetrical as 40 to a horizontal plane through the elevator, and by this construction the elevator can be reversed in position for the purpose to be further described. I

A pair of jaws 4, 5 are pivotally mounted in 45 the body I and each jaw is provided with a pipe engaging jaw which is substantially semi-cylindrical in form. Each of the jaws is provided with outwardly extending hubs 6, 1 on the top and bottom thereof, which project over the body 50 l, and a pin 8 extends through the hubs, and

the body, thus pivotally attaching the jaws to the body. The pins 8 are arranged in. alignment and are preferably substantially in alignment with the center line of the ears 2, 3, as shown in 55. Figures 1 and 2.

At one end, the jaws 4, 5 are provided with a tapered seat 9 forthe purpose of receiving up-set type of pipe, and the othcr'end of the jaws are not provided with a seat,so that the pipe having couplings or collarscan be worked upon. Thus, 5

by turningthe elevator end for end, it is possible 'to work upon either up-set type of pipe, or the collar type. Since the body of the elevator is symmetrical on each side of a horizontal plane,

through the'center of the elevator, this reversing 10 can be accomplished without impairing the' strength or effectiveness; of the tool. The overlapping hubs 6,1 of the gates will transmit the load of the pipe directly to the body of the elevator which is designed to carry the entire weight.

From an examination of Figures 1 and- 2, it is seen that the jaws 4, 5, when in closed position, will entirely encircle the pipe and these jaws meet onia line at the center of the elevator, thus enabling the jaws to be complementary in shape, and consequently, simple to cast and machine. l

The jaws are locked when encircling the pipe I by means of ablock III, which ismounted on the' body I and is yieldably pressed against a shaped seat H in each of the jaws. The block I0 is spring pressed into its seat in the jaws, and consequently, the jaws are effectively held around the pipe, and are only releasable by manually operablemeans, substantially of the following character:

. A pair of pins l2, l3 extend horizontally through the body of the elevator and are slidable in said body. Coil springs l4, I5 surround the 5 pins I2, l3, respectively, and bear against the heads of these pins, thus yieldably pressing the pins outwardly to the position shown in Figure 2. An arm l6 extends across the back of the elevator and is pivotally attached to both of the pins" 12 and I3. The block! is secured to the center of the arm l6, and it will thus be evident that the springs M, iii will press the block IIJ into its seat as shown in Figure 2.

The block is withdrawn from its seat by pressing either of the pins l2 or l3 inwardly, whereupon the jaws 4, 5 are free to swing outwardly, and release the pipe. A rearwardly extending finger I1 is provided on each of the jaws 4, ,5 for the purpose of retracting the block 10, when the jaws are moving into closed position.

in Fig. 1 to hold both of the jaws in such open position and will thus prevent their accidentally closing.

Having described my invention, I claim:

1. An automatic elevator comprising a body, said body having a pipe receiving opening therein, a pair of jaws pivotally mounted in the body, each of said jaws being adapted and arranged to partially encircle the pipe, a lock block adapted and arranged to engage both'of the jaws in closed position thereof, a pair of pins slidably mounted in the body, an arm mounted on the pins, said locking block being mounted on the arm, and a spring engaging each of the pins, and urging said pins outwardly, whereby the block is urged towards seated position. a

2. An automatic elevator, comprising a body, said body being symmetrically formed above andbelow a horizontal plane through the center of I the body, said body having a pipe receiving opening therein, a pair of jaws pivotally mounted in the body, each of the jaws being adapted and arranged to partially encircle the pipe, hubs on each of the jaws projecting over the body, a pivot pin extending through the hubs and through the body, and lock means engageable with the jaws in closed position thereof, whereby the jaws are held to encircle the work, said lock means comprising a pair of spring pressed pins slidably mounted in the body, and an arm attached to each of the pins and to a block, engageable with the. jaws.

3. An automatic elevator, comprising a body, said body having a pipe receiving opening therein, a pair of jaws pivotally mounted in the body, each of said jaws being adapted and arranged to partially encircle the pipe, a lock block adapted and arranged to engage both of the jaws in closed position thereof, a pair of horizontally arranged pins slidably mounted in the body, an arm mounted on the pins with a lost-motion connection, said lockingblock being mounted on the arm, and a spring engaging each of the pins and urging said pins outwardly, whereby the block is urged towards seated position.

4. An automatic elevator, comprising a body,

' said body having a pipe receiving opening therein,

a pair of jaws pivotally mounted in the body, each of said jaws being adapted and arranged to partially encircle the pipe, a lock block adapted and arranged to engage both of the jaws in closed position thereof, a pair of horizontally arranged pins slidably mounted in the body, said pins being arranged one-on each side of the pipe receiving opening, an arm mounted on the, pins with a lost motion connection, said locking block being piv-,-

otally mounted on the arm, and a spring ehgag ing each of the pins, and urging said "pins outwardly whereby the block is urged towards seated position. v s

HOWARD E. WILLIAMS.

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