US3037208A - Force applying tool - Google Patents

Description

June 5, 1962 A. H. HABERSTUMP 3,037,208

FORCE APPLYING TOOL Filed July 8, 1959 4 l b 34 4/ I 17 J! jg v a I IN V EN TOR. //7'e bf/94 16 run/@977;

United States Patent 3,037,208 FORCE APPLYING TOOL Alfred H. Haberstump, Detroit, Mich., assignor to Haberstump-Harris, Inc., Detroit, Mich, a corporation of Michigan Filed July 8, 1959, Ser. No. 825,759 8 Claims. (Cl. 1220) This invention relates to force applying tools, and particularly to a force applying tool in which the position of the clinching jaws may be changed.

The tool of the present invention is an improvement over that illustrated in the patent to A. H. Haberstump, No. 2,767,401, issued October .23, 1956, and assigned to the assignee of the present invention. A cylinder is provided in the extension of the supporting handle containing the operating valve for controlling the flow of air to and from the cylinder. The forward end of the cylinder is closed by a head which is retained against longitudinal movement by a locking rod which permits the angular adjustment of the head relative to the cylinder. The head supports a pair of rockable clamping jaws actuated by a wedge carried on a piston disposed within the cylinder. The outer ends of the jaws are moved toward and away from each other when the wedge is advanced and retracted, respectively. A spring clip on the head enters slots at the end of the cylinder to lock the head in any one of a plurality of adjusted positions. In this manner, the jaws may operate in the plane of the handle or at any angle to such plane.

Accordingly, the main objects of the invention are: to provide a pressure applying tool having jaws which may be adjusted to operate in different planes relative to a plane through a gripping handle; to provide a head in a cylinder on the end of a handle of a tool which supports force applying jaws actuated by a Wedge on a piston which may be angularly adjusted to operate the jaws in planes at an angle to the plane through the handle; to provide an adjustable head on a cylinder at the end of the handle of a force applying tool which has a spring latching element thereon which may be engaged in one of a plurality of slots in the end of the cylinder for locking the head in a desired position so that the jaws will operate in a plane through the handle or at a desired angle relative thereto, and, in general, to provide a force applying tool which is simple in construction, positive in operation, and economical of manufacture.

Other objects and features of novelty of the invention will be specifically pointed out or will become apparent when referring, for a better understanding of the inven tion, to the following description taken in conjunction with the accompanying drawing, wherein:

FIGURE 1 is a sectional view, in elevation, of a force applying tool embodying features of the present invention;

FIG. 2 is a sectional view of the structure illustrated in FIG. 1, taken on the line 22 thereof, and

FIG. 3 is a broken view of the structure illustrated in FIG. 1, with the locking spring in unlatched position.

The tool embodies a frame 10 having a handle portion 11 and a cylinder portion 12 in unit relation with each other. A head 13 seals the rear open end of the cylinder, being provided with a peripheral notch 14 in which an O-ring 15 is secured in sealed relation to the inner cylindrical wall. The head is retained in position by a split ring 16 which extends within a groove 17 in the inner wall of the cylinder near the end thereof. A threaded stop element 18 is secured in the head for limiting the retractive movement of a piston 19 mounted within the cylinder. An O-ring 21 seals the stem of the threaded element 18 from the escape of fluid through the head.

3,037,208 Patented June 5, 1962 The piston 19 has an annular slot 22 in which an O-ring 23 is mounted for sealing the piston with the wall of the cylinder. A stem 24 extends forwardly from the piston 19, having on the forward end a wedging element 25 containing a rear section 26 having diverging sides and a forward section 27 having sides of greater divergency. The sections having sides of different slope are provided for a purpose which will be explained hereinafter.

The forward end of the cylinder 12 is closed by a head 28 which is retained within the cylinder by a square brass rod 29. The rod is directed into a slot 31 through the Wall of the cylinder 12 and advanced into the square opening formed by a slot 32 in the peripheral wall of the head 28 and a slot 33 in the inner wall of the cylinder. After the straight rod has been advanced into the annular slot formed by the two recesses, a right-angle end section 34 is inserted in an aperture 35 within the head to prevent the rod from moving outwardly of the annular slots. The rod prevents the forward and rearward movement of the head within the cylinder but permits the angular adjustment thereof therewithin.

The head supports spaced bosses 36 between which a pair of jaws 37 and 38 are secured by a pivot 39. Clip supporting means. may be provided on the forward end of the jaws, as illustrated in the above mentioned patent, or other forms may be provided thereon for applying pressure to an element or device each time the tool is operated. The rearward ends of the jaws 37 and 38 have rollers 41 secured thereon by pivots 42, with the forward end section 27 of the wedge 25 disposed therebetween. It will be noted from the relationship of the wedge with the rollers that the initial forward movement of the piston 19 causes the separation of the rollers 41 much more rapidly than when the sloping surfaces of the rear section 26 are advanced therebetween. With this arrangement, greater force is applied near the end of the movement of the piston than at the initial portion thereof. The jaw ends approach the element to be operated on in a more rapid manner at the time the initial work is to be performed thereon, followed by a slower movement of the jaws with a greater applied pressure.

The jaws may operate in the plane through the handle, as illustrated in FIG. 1, or may be disposed to operate in a plane at an angle to such plane. The forward end of the cylinder 12 is provided with a plurality of notches 43 in which a locking spring finger 44 may extend. When the finger is disposed in a notch, as illustrated in FIGS. 1 and 2, the head is clamped against rotation to have the jaws operate in a desired plane. When the locking spring finger 44 is pushed forwardly and the head is turned, as illustrated in FIG. 3, the head may be adjusted to any position to have the jaws operate at right angles to the plane through the handle or at any angle in which the jaws may be locked when the latching spring 44 is positioned within a notch. When the notches 43 are omitted, the frictional engagement of the spring 44 with the front end of the cylinder 12 retains the head in adjusted position. A spring 45 returns the piston 19 to its rearmost position and the slight clearance of the piston with the cylinders side walls permits the wedge and piston to be turned with the head. The flat sides of the section 27 engaged by the rollers and the sides of the wedge 25 engaged by the flat walls of the rectangular elements 46 disposed within the central portion of the head assure the retention of this relationship in all positions of adjustment of the head. A line contact always occurs between the surfaces of the forward section 27 and the rearward section 26 with the surface of the rollers 41.

Air for operating the tool is introduced through the connector 47 into a passageway 48 where it is trapped by a ball type valve 49 urged against an O-ring seat 51 3 by a spring 52. The rearward movement of a plunger 53 against the pressure of a spring 54 unseats the ball and permits the air to enter the chamber through a passageway 55. A pivoted trigger 56 engages the plunger 53 to produce its operation.

The present invention permits the operator of the gun to have the pressure applied in a plane which is in the plane of the handle or at any desired angle relative thereto, to thereby eliminate the necessity of the operator turning his wrist in order to apply a force by the tool. With this arrangement, the force may be applied at any desired angle in the plane or laterally of the plane of the handle. A simple adjustment permits the jaws which operate in a plane in which the force is applied to be changed to operate in any other plane at the will of the operator. The rotation of the head within the cylinder rotates the bosses 36, the jaws 37 and 38, the piston 19 and the wedge 25 extending forwardly thereof. The cylinder is of substantial area so that the air admitted in the rear end thereof produces a substantial force on the piston when advanced, which force is substantially augmented by the wedging action occurring between the rollers 41 and the wedge 25 when the latter is advanced therebetween.

Upon the release of the trigger 56, the ball 49 seats against the O-ring 51 and the air between the piston 19 and head 13 returns through the passageway 55 and out through a passageway 57. The plunger 53 seals an orifice 53 when moved to ball unseating position, to thereby prevent the air from moving directly from the passageway 48 into the passageway 57.

What is claimed is:

1. In a force applying tool, a cylindrical body closed at one end, a closure head secured at the other end of the body against longitudinal movement while being mounted for rotation thereon, force applying means carried by said head, and means for releasably locking said head on said body after it is adjustably rotated.

2. In a force applying tool, a cylinder closed at one end and having a piston therein, a closure head at the other end of the cylinder secured against longitudinal movement thereon while being adjustable in rotation, releasable latching means for securing the head in rotated adjusted position, and force applying means on said head actuated by said piston.

3. In a force applying tool, a handle, a cylinder having a closed end, said cylinder being mounted on one end of said handle, a piston in the cylinder, a closure head closing the other end of the cylinder when secured against longitudinal movement thereon but adjustable in rotation, a force applying means on said head actuated by said piston, and releasable latching means for securing the head in a rotational adjusted position.

4. In a force applying tool, a handle, a cylinder on said handle having a closed end, a piston in said cylinder, a closure head secured on the open end of said cylinder against longitudinal movement and for rotational adjustment thereon, force applying jaws carried by said head and pivoted together interjacent their ends, and wedge means on said piston extending between the jaws at one end thereof.

5. In a force applying tool, a handle, a cylinder on said handle having an open end, a piston in said cylinder, a closure head secured to the open end of said cylinder against longitudinal movement and for rotational adjustment thereon, force applying jaws carried by said head and pivoted together interjacent their ends, rollers on the jaws at one end thereof, Wedge means on said piston extending between said rollers the open end of said cylinder having spaced notches, and a fiat spring latch on said head engageable with one of said notches.

6. In a force applying tool, a handle, a cylinder on said handle having an open end, a piston in said cylinder, a closure head secured to the open end of said cylinder against longitudinal movement and for rotational adjustment thereon, force applying jaws carried by said head and pivoted together interjacent their ends, rollers on the jaws at one end thereof, wedge means on said piston extending between said rollers and having two tapered sections, the forward section having a greater taper than the rearward section.

7. In a force applying tool, a cylindrical body closed at one end, a closure head secured at the other end of the body against longitudinal movement while being mounted for rotation thereon, force applying means carried by said head, and means for frictionally securing said head on said body after it is adjustably rotated.

8. In a force applying tool, a handle, a cylinder on said handle having an open end, a piston in said cylinder, a closure head secured to the open end of said cylinder against longitudinal movement and for rotational adjustment thereon, force applying jaws carried by said head and pivoted together interjacent their ends, rollers on the jaws at one end thereof, wedge means on said piston extending between said rollers, and a lock on said head securing said head in adjusted position.

References Cited in the file of this patent UNITED STATES PATENTS 1,939,632 Randall Dec. 12, 1933 2,487,475 Powers Nov. 8, 1949 2,730,719 Steiner Ian. 17, 1956 2,766,631 Van Sittert Oct. 16, 1956 2,767,401 Haberstump Oct. 23, 1956 2,801,415 Jenny Aug. 6, 1957 2,887,686 Wandel May 26, 1959 2,968,042 Yankee Jan. 17, 1961

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