US1547944A

US1547944A - Means for removing broken stud bolts

Info

Publication number: US1547944A
Application number: US720627A
Authority: US
Inventors: Willie J Murphree
Original assignee: Individual
Current assignee: Individual
Priority date: 1924-06-17
Filing date: 1924-06-17
Publication date: 1925-07-28
Anticipated expiration: 1942-07-28

Description

July-28, 192 5.

, W. J. MURPHREE [MEANS FOR REMOVING BROKEN STUD BOLTS Filed June 17. 1924 Patented July 28, 1925.

. UNITED STATES WILLIE 'J. munrnnnn, or En cniv'rno, CALIFORNIA.

mmns ronnnmovrue Baoxnn .s run BOLTS.

Application filed June 17, 1924. Serial No. 720,627.

To all whom it may ,Be-i kno n t at I, WILLJE J- a citizen of the United States, residingat,

El Centro, in the county of Imperial and State of California, have invented certain new and useful Improvements in a Means for Removing Broken Stud Bolts, of which the following is a specification.

This invention relates ,to new and useful improvements in a means for removing broken stud bolts and has for its principal object to provide a means which will efgciently and positively remove a broken stud olt.

Another important object of the invention is to provide a means for removing broken stud bolts and is especially adapted for use in conjunction with the removal of broken stud bolts from a cylinder block.

A still further object of the invention is to provide a means of the above mentioned character, which is simple in construction, inexpensive, strong and durable and furthermore adapted for the purposes for which it is designated. I

A still further object is to provide a means for removing broken stud bolts of the above mentioned character which may be readily and easily used and will further save considerable time in extracting broken stud bolts.

Other objects and advantages of this invention will become apparent during the course of the following description.

In the accompanying drawing forming a part of this specification and in which like numerals designate like parts throughout the same:

Figure 1 is a detail perspective view of my improved tool;

Fig. 2 is a view partlyin section and part ly in side elevation, showing the manner in which the tool is used in forming the grooves in the inner wall of a broken stud bolt which is threaded in a cylinder block; and

Fig. 3 is a bottom plan view of my improved tool.

In the drawing wherein for the purpose of illustration is shown the preferred embodiment of my invention, thenumeral l designates generally my improved tool and the same comprises the cylindrical shank portion, the lower portion of which is provided with longitudinally extending spaced grooves 3 whereby the longitudinal ribs 4 are formed thereby. The bottom of the tool is drilled to form the substantially concaved porti0n wh reby utting ed es 6 are formed on the lower edgesof the longitudinally extending ribsi, the purpose of which will be hereinafter more fully des ri d.-

The upper end of the shank portion 2 of the tool 1 is provided with the square head 7 whereby a means is provided for the reception of a wrench or other similar tool to facilitate the rotation of the tool when removing a broken stud bolt.

In removing broken stud bolts, the stud bolt A which is threaded in the cylinder block B in the manner'well known in the art has an opening drilled in the top thereof, it being understood of course that the.

hole or opening 8 is of a diametb slightly less than the diameter of the bolt extracting tool. The tool 1 is then placed over the opening 8 so as to have the cutting edges 6 resting on the top of the bolt A. The tool is then struck with a hammer on the head ,7 thereof so that the cutting edges 6 will cut into the upper portion of the stud bolt and form a plurality of vertical spaced grooves in the. inner wall of the broken stud bolt simultaneously causing the ribs 4: on the lower edges of which are formed the cutting edges 6 to be received in the longitudinal grooves formed by the cutting edges. The portions of the stud bolts A which are cut away in forming the grooves in the inner wall of the bolt are illustrated at 9 in Fig. 2 of the drawing.

After the tool has been driven down into the stud bolt for a suitable distance so that the rib 4 will beseated in the longitudinal grooves in the broken stud bolt the wrench or other suitable tool is placed in engagement with the square head 7 on the upper end of the tool and by turning the tool in the proper direction, the coacting ribs and grooves will cause the broken stud bolt to be entirely removed from threaded engagement with its support.

It will'thus be seen from the foregoing description, that a simple and efficient means has been provided whereby broken stud bolts may be readily and easily removed without the loss of time or labor. It is of course to be understood that the tool used in removing broken stud bolts is constructed of any suitable material, preferably hardened tool steel. Further a tool of this character may be employed in connection with either left or right threaded bolts.

While I have shown the preferred embodiment of my invention, it is to be understood that various changes in the size, shape and arrangementof parts may be resorted to without departing from the spirit of the in- Vention and the scope of the appended claim.

Having thus described the invention, What I claim is A tool for removing broken stud bolts, the latter having an opening formed in the top thereof, said tool comprising a shank portion of greater diameter than the diameter of the opening, longitudinally spaced ribs on the outer portion of the shank, the

bottom of the tool being substantially concaved forming cutting edges on the lower edges of the ribs for engaging the end of WILLIE J. MURPHREE.