US1806799A - Charles c - Google Patents

Description

May 26, 1931.

C. C. HANSEN STEEL RETAINER Filed Sept. 30, 1927 z X I25 a4.

IYVVENTOR.

HIS ATTO NEY (Zn vies aasqa Patented May 26, r 1931 UNITED STATES PATENT OFFICE CHARLES C. HANSEN, F ELASTON, PENNSYLVANIA, ASSIGNOR T0 INGERSOLL-RAND COMPANY, OF JERSEY CITY, NEW JERSEY, A. CORPORATION OF NEW JERSEY STEEL RETAINER Application filed September 30, 1927. Serial No. 223,040.

This invention relates to pneumatic tools, but more particularly to a steel retainer for that type of tool known as a coal pick.

It is an object of this invention to provide a very simple and efiicient device to retain the invention, a

Figure 2 is aside view of a coal pick, part of which is a section taken on the line 2-2 of Figure 1 looking in the direction indicated by the arrows,

Figure 3 is a view of the left side of part of Figure 2, and

Figure 4 is a View of the right side of part ofFigure 2.

Referring more particularly to the drawings, A represents the front part of the cylinder of a pneumatic tool inwhich is mounted a reciprocatory hammer piston B. The front end of the cylinder A is closed by a front cylinder washer C through which passes an anvil block D used to transmit the blows of the piston B to a tool or working implement E. A front head F is secured to the cylinder A by means of side bolts G- passing through lugs H and secured at the rear end of the cylinder by nuts (not shown). Between the heads J of the side bolts G and the lugs H are interposed springs K.

The fronthead F is so formed that the shank L of the workin implement E may be inserted and the collar accommodated by the enlarged longitudinal bore P. An enlargement Q, on the front part of the front head permits the forming of a transverse bore R which communicates at a point inter mediate its ends with the longitudinal bore P and has substantial side walls S. The bore R is reduced at one end as shown at R and in this reduced portion a slot V, of which the bottom forms a continuation of the transverse bore R, is formed.

During the operation of tools of this type, it is necessary to prevent the ejection of the working implement from the front head. To this end a pin T is made as follows: A cylindrical shank or middle portion U is provided at one end of which is a stem W. On the stem W is formed a hook K. On the oppcsite end of the middle portion U is a collar Y and a handle Z of considerable weight.

The retainer operates in the following manner: The working implement E is first inserted into the front head F. The'pin T is then placed in the bore R in such a way that the hook X passes through the slot V. The weight of the handle Z is sufficient to turn the hook X out of registry with theslot V and to prevent the turning of the hook during the operation ofthe tool. The collar Y and the hook X are constantly in body con tact with the sides of the front head, thus eliminating transverse movement of the pin T. As will be readily seen from the drawing, once the pin T is in place it is impossible for the collar 0 of the working implement to pass it although it is a very simple operation for the workman to remove the pin when he wishes to change the working implement.

. I claim:

1. In a pneumatic tool, the combination of a front head having a longitudinal bore and a transverse bore communicating at a point intermediate its ends with the longitudinal bore, said transverse bore having a reduced portion at one end, a collared working implement in the longitudinal bore, a pin in the transversebore forming an abutment for the collar of the working implement to maintain the working implement in the front head, a stem on one end of said pin extending into the reduced portion of the transverse bore, a hook on the stem toengage one side of the front head for holding the pin against endwise movement in one direction, a slot in the wall of the reduced portion of the transverse bore to permit the passage of the hook through said bore, the bottom of the slot forming a continuation of the transverse bore, and angularly disposed weighted means on the other end of the pin normally maintaining the hook in a position remote from the slot, said hook and said angularly disposed means in body contact with the sides of said front head.

2. In a pneumatic tool, the combination of a front head having a longitudinal bore and a transverse bore communicating at a point intermediate its ends With the longitudinal bore, said transverse bore having a reduced portion at one end, a Working implement in the longitudinal bore having a collar, a pin in the transverse bore forming an abutment for the collar to maintain the Working im plement in the front head, a stem on one end of the pin extending slidably into the reduced portion of the transverse bore, a hook on the free end of the stem to engage one side of the front head for maintaining the pin in the transverse bore, a slot in one side of the Wall of the reduced portion of the transverse 2O bore to permit the passage of the hook through said bore, the bottom of the slot forming a continuation of the transverse bore and a lever on the pin for manipulating said pin, said lever and said hook having body contact with the sides of said front head, said lever being disposed at an angle With respect to the pin and of such Weight as to prevent rotation of the pin, thus maintaining the hook out of registry with the slot. In testimony whereof I have signed this specification.

CHARLES C. HANSEN.

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