Bolt and nut remover tool set

• US 6,536,309 B1
• Filed: 06/29/2001
• Issued: 03/25/2003
• Est. Priority Date: 06/29/2001
• Status: Expired due to Fees

• Current Assignee: Lisle Corporation
• Original Assignee: Lisle Corporation
• Inventors: Pool, James L.
• Primary Examiner(s): Smith, James G.
• Application Number:
  US09/897,807
• Time in Patent Office: 634 Days
• Field of Search: 81/532, 811/20, 811/243
• US Class Current: 81/53.2
• CPC Class Codes: B25B 13/065 characterised by the cross-section of the socket
• CPC Class Codes: B25B 27/18 withdrawing broken threaded parts or twist drills

Abstract

A bolt and stud removal tool as well as a set thereof includes a body member with a throughbore having a stud engaging end and a shard receiving end. A plurality of uniformly and substantially identical teeth are defined on the inside of the throughbore at the stud engaging end, each tooth defined by converging walls to define a truncated, converging profile.

Claims

1. A bolt and stud removal tool comprising, in combination:

an elongate member symmetrical about a centerline axis and including an external surface and a shaped internal bore extending axially from a first end of the tool, said elongate member further including a polygonal shape on at least part of the external surface;

said member further including a bolt and stud engaging section in the bore extending from said first end of the member and a shard receiving section in the bore extending axially from the bolt and stud engaging section, said shaped external surface having a regular polygonal form for engagement by a working tool;

said shaped bore at the bolt and stud engaging section comprising at least three, equally spaced, parallel, radially inwardly projecting internal ribs formed on the interior of the bore, each of said ribs defined by first and second converging walls parallel to the centerline axis, said first and second walls defining converging planar projections and a third connecting wall also parallel to and spaced from the centerline axis and intersecting the first and second walls to define intersecting edges, the planar projections of the converging walls of each rib intersecting along a line intermediate the centerline axis and the third wall said first, second and third walls intersecting to define said edges for cutting into a bolt or stud when the tool is driven onto said bolt or stud.

2. The bolt and stud removal tool as set forth in claim 1 further comprising a throughbore in the elongate member.

3. The bolt and stud removal tool of characteristics of claim 1 in combination with a set of such tools having different dimensions.

4. The bolt and stud removal tool of claim 1 further including a counter bore at said first end of said member intersecting the first, second and third walls of the teeth to facilitate alignment of the tool on a bolt or stud.

5. The bolt and stud removal tool of claim 1 wherein said tool incorporates six equally spaced symmetrical teeth formed about the periphery of the centerline axis.

6. A bolt and stud removal tool as set forth in claim 1 wherein the shard receiving section has a diameter greater than the maximum diameter of the bolt and stud engaging section.

7. A bolt and stud removal tool as set forth in claim 1 wherein adjacent teeth define a groove therebetween and wherein the opposed walls of adjacent teeth are parallel to one another.