US1524761A - Well-casing hook - Google Patents

Description

Feb. 3, 1925. I

' 1,524,761 E. TIMBS ,WELL cAsme'HooK Original Filed March 5, 1923 nnwann rnuBs, or Los ANGELES, camroanra, Ass enon ro nivron roor. COMPANY,

OF ronnancn, CALIFORNIA, a conroaa'rion or CALIFORNIA.

WELLfCASING' HQOK.

Original application filed March 5, 1923, Serial No. 622,819. Divided and 1924. Serial No. 731,758.

To all/whom it may concern:

Be it known that I, EDWARD Times, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented a new and useful lVelLCasing Hook, of which the following is a specification.

This invention relates to well casing hooks of the type used in oil derrick equipment and refers particularly to providing such. hooks with safety bars for closing the mouth of the hook whereby the load on the hook cannot be accidentally disengaged therefrom. This application is a division of my copending application, Serial No. 622819, filed March 5th, 1923 A well casing hook, principally on account of the weight. of the hook itself and the tremendous loads which are placed on the hook, is distinctly a different device from what is generally referred to by the simple term hook. .Vell casing hooks normally weigh around 500#,and if spring poised, weigh around 1000#. To provide such hooks with a safety bar involves problems not hitherto solved.

An object of this invention is to provide a well casing hook with a safety bar which may be readily opened by a pull on an operating chain, readily maintained in the open position, and readily released to close the mouth. of the hook, whereby the hook will positively maintain its load at all times.

Another object of this invention is to provide a well casing hook with a safety bar which is pivotally hinged to the hook and is provided with a spring adapted to place tension on the safety bar to normally maintain the bar closed.

another object of this invention is to provide an attachment, including a safety bar, which is adapted to fit the well casing hooks now in use.

Other objects of this invention will appear from the following drawings illustrating one of the preferred embodiments.

Figure 1 is a perspective view of one embodiment illustrating the safety bar closing the mouth of the hook and showing the embodiment of my invention in a spring poised casing hook.

Figure 2 is a perspective view illustrating the hook in the open position.

this application filed August 13,

Figure 318'3 vertical-elevation. with the upper portion of the hook broken away to contract the view. I

Figure 4 is a plan View sectioned on the line ie-a of Fig. 3. i V

Figure 5 is a vertical section on the line 55 of Fig. 4..

Figure 6 is a vertical section on the line 66 of Fig. 3.

Figure 7 is a section of the safety bar taken as indicated bythe line 77of Fig. 5. Referring to the drawings, the casing hook is illustrated as comprising afhook member 1 terminating at its lower end in a hook shaped portion 2 and having extends ing therefrom a cylindrical shank 3. A dome nut 4 is threaded upon the upper end of the shank 3, imparting tension to a coiled spring 5. Said coiled spring 5 telescopes at its opposite end a cylindrical sleeve 6 mounted on a supporting block 7. The block 7 is apertured to provide a running fit for the shank 3 of. the hookmemher, which is thus .poised on the, spring 5. The supporting block 7 comprises a rectangular block having gudgeons '8 horizontally extending therefrom. The gudgeons 8 fit in bearings 10 provided at each end of a bail 9.

In the embodiment illustrated in Figs. 1 to 7 inclusive of the drawings, a collar 15 is secured to the shank below the sup porting block 7. Said collar comprises a front half collar having extending ears 14 supporting a pin 13, and a rear half collar having projecting arms 18 which terminate in crow feet 19. The front and rear half collars are hinged together at one end and clamped on to the hook member by a bolt'17 at the other end.

A safety bar 11 adapted to close the mouth of the hook 2 is provided at one end with bearings 12 by which it is hinged to the pin 13. A spring 16 is wound on the pin 13 and applies a tension tending to close the bar across the mouth of the hook. Fixed to the bar 11 at opposite sides are two pins 20 to which is connected an operating chain 21 which passes around the back of the hook and is provided with spring sections 22. In operation the safety bar 11 is normally maintained across the mouth of the hook.

A pull on the operating chain will open the hook and by engaging the crow feet with the chain the bar may be maintained in the open position. The springs 22 are provided in the chain so that'the bar may be closely held against the back of the hook. In this position the hook will readily engage the load and by release of the chain from the crow feet the spring 16 will close the bar across the mouth of the hook securing the load.

While I have described the safety bar mechanism as an attachment for a normal casing hook it can be readily seen that such mechanism might be incorporated as part of the hook in the first instance. My invention is not limited to the preferred embodiment shown but is of the scope set forth in the following claims.

I claim:

1. In a well casing hook, a safety bar for normally closing the mouth of said hook, spring means for maintaining said bar in closed position, an operating chain connected to said bar, and means for engaging said chain and holding said bar in the open position.

2. In a Well casing hook, a safety bar for normally closing the mouth of said hook, spring means for maintaining said bar in the closed position, an operating chain, and the hook having fingers adapted to engage the chain to hold said bar in the open position.

3. In a Well casing hook, a safety bar for 35 normally closing the mouth of said hook,

spring means for maintaining said bar in the closed position, a spring equipped operating chain, and means adapted to engage said chain to hold said bar in the open position.

4. In a well casing hook, a hook member, a safety bar normally closing the mouth of said hook member and pivoted at one end to the neck of the hook member, spring means normally maintaining the bar in said closed position, an operating chain secured to said bar and extending rearwardly of the hook member whereby said bar may be actuated from the rear of said hook member, and means carried by the hook member engageable with said chain to maintain the bar in open position.

5. In a Well casing hook, a hook member, a safety bar normally closing the mouth of said hook member and pivoted at one end to the neck of the hook member, spring means normally maintaining the bar in said closed position, an operating chain secured to said bar and extending rearwardly of the hook member whereby said bar may be actuated from the rear of said hook member, and means carried by the hook mem ber engage-able with said chain to maintain the bar is open position, said means beingadapted to hold said bar snug against the neck of said hook member.

Signed at Torrance, California this 7th day of August, 1924.

EDWARD TIMES.

Images