US867036A

US867036A - Pull-rod grip.

Info

Publication number: US867036A
Application number: US35516207A
Authority: US
Inventors: Charles C Hanford
Original assignee: Individual
Current assignee: Individual
Priority date: 1907-01-31
Filing date: 1907-01-31
Publication date: 1907-09-24
Anticipated expiration: 1924-09-24

Description

No. 867,036. PATENTED SEPT. 24, 1907. 0.0. HANPORD.

; PULL ROD GRIP.

APPLICATION FILED JAN. 31, 1907.

Charla; CHwj/m d lxmmeooeo v Qthzmua CHARLES C. HANFORD, OF TOLEDO, OHIO.

PULL-ROD GRIP.

Specification of Letters Patent.

Patented Sept. 24, 1907.

Application filed January 31, 1907. Serial No. 355,162.

To all whom it may concern: I

Be it known that I, CHARLES (1. HANFORD, a citizen of the United States, and a resident of Toledo, in the county of Lucas and State of Ohio, have invented certain new and useful Improvements in Pull-Rod Grips; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make anduse the same, reference being had to the accompanying drawings, and to the figures of reference marked thereon, which form a part of this specification.

My invention relates to oil-well appliances, and particularly to pull-rod grips employed for drawing the broken ends of iron pull-rods together to enable the sameto be repaired.

--The primary object of my invention is the provision of a simple and highly efiicient grip of this class, which will act automatically to grip a pull-rod when a pull is exerted in one direction, and to release the rod when the pull is in the opposite direction, and which has its body so fashioned as to provide an unobstructed way throughout its length in which a pull-rod is intend ed to rest and to form, at one end of the grip and at opposite sides of an engaged pull-rod, means to which a pullingjack may be attached whereby the pull exerted on the grip is in direct axial alinement with the pull-rod, thus preventing the injurious kinking or bending of the engaged rod, which would be occasioned were the pull exerted laterally of the rod.

The invention is fully described in the following specification and illustrated in the accompanying drawings, in which,

Figure 1 is a plan view of a pull-rod grip made in accordance with my inventionand showing a rod engaged by the grip. Fig. 2 is a central longitudinal section of the same, and Fig. 3 is a transverse section on the line 33 inFig. 1.

Referring to the drawings, the numeral 1 designates the body portion of my pull-rod grip, said grip having its .end 2 formed with oppositely-disposed

lugs

3, 3, the inner faces of said lugs being inclined, as at 4, and pro vided at their outer ends with an opening 5 for receiving a pull-rod.

The opposite end of the body-portion 1 is provided with two spaced lateral lugs or

furcations

7, 7, the opening between which is of suitable size to freely receive the rod 6 and stands longitudinally of the body 1 in alinement with the opening 51 These lugs or furcations are shaped in the form of hooks, as shown, to provide means on each side of the pull-rod to which the chain of a pulling-jack may be attached. By the provision of this form of hooks the chain of the pulling-jack is enabled to be attached to the grip on opposite sides of the pull-rod and in direct axial alinement therewith, thus causing the draft to be exerted longitudinally of the rod. This is found to be a very important feature in the practical operation of a pull-rod grip, as otherwise a lateral strain is exerted on the rod and kinks or bends the same at the outer end of the gripping-jaws, thus breaking the fiber of the rod at such point and weakening it.

A pair of sliding wedges 8, provided with inclined sides 9 designed to fit against the inclined portions 4 of the lugs 3, are mounted to slide in the body portion 1 by means of the oppositely inclined slots 10 through which the bolts 11 pass, said bolts being seated in threaded openings in the wedges 8, as shown more particularly in Fig. 3. The parallel inner surfaces of the wedges 8 are provided with biting teeth 12. i

The operation of my invention may be briefly described as follows :When it is desired to connect the parted ends of a pull-rod, one of my grips is attached to each disconnected end of the pull-rod. When the grip is secured to the rod by merely moving the wedges, as toward the left in Fig. 1, a pull upon the grip will tighten the wedges against the rod. To pull the two ends of the pull rod together, an ordinary pulling-jack is engaged with the

hooks

7, 7 of each grip, and the lever of the jack is actuated to shorten the distance between the two opposite ends, in an obvious manner, the pull on the grips being in axial alinement with the attached rods.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is,

1. A pull-rod grip comprising a body portion provided at one end with gripping means and at its opposite end with spaced laterally projecting hooks forming between them a recess for the reception of a rod and providing means on opposite sides of such rod for the attachment of a draft-member, whereby the pull exerted on the grip is in axial alinement with the rod operated on. I

2. A pull-rod grip comprising a body portion provided at one end with oppositely-disposed lugs having oppositely inclined faces and at its other end with laterally-projecting; oppositely-disposed hooks, said hooks forming between them a recess of suitable size tofreely receive a pull-rod and standing longitudinally of the body in alinement with the opening between said lugs and providing means adapted for the attachment of a draft-member whereby the pull exerted on the grip is in direct axial alinement with the rod operated on, and rod-gripping means coacting with the inclined faces of the lugs on the body to grip a rod when pull is exerted on the hooks.

In testimony whereof, I alfix my signature in presence of two witnesses.

. CHARLES C. HANFORD.

Witnesses:

A. P. DAVIS, H. W. WURBINGTON.