Removal tool for locking nut, bolt and clip systems and assemblies

• US 6,988,431 B2
• Filed: 12/12/2001
• Issued: 01/24/2006
• Est. Priority Date: 04/10/1996
• Status: Expired due to Fees

• Current Assignee: Permanent Technologies, Inc.
• Original Assignee: Permanent Technologies, Inc.
• Inventors: DiStasio, Robert J.
• Primary Examiner(s): Meislin, Debra S.
• Application Number:
  US10/015,408
• Publication Number:
  US 20020083804A1
• Time in Patent Office: 1,504 Days
• Field of Search: 811/761.5, 814/61
• US Class Current: 81/176.15
• CPC Class Codes: C07C 213/10 Separation; Purification; Stabilisation; Use of additives
• CPC Class Codes: C07C 215/60 the chain having two carbon atoms between the amino groups and the six-membered aromatic ring or the condensed ring system containing that ring
• CPC Class Codes: C07C 217/30 having the oxygen atom of at least one of the etherified hydroxy groups further bound to a carbon atom of a six-membered aromatic ring
• CPC Class Codes: C07C 227/34 by separation of optical isomers
• CPC Class Codes: C07C 229/08 the nitrogen atom of the amino group being further bound to hydrogen atoms
• CPC Class Codes: C07C 269/08 Separation; Purification; Stabilisation; Use of additives
• CPC Class Codes: C07C 271/22 to carbon atoms of hydrocarbon radicals substituted by carboxyl groups
• CPC Class Codes: C07D 207/16 Carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals
• CPC Class Codes: F16B 39/32 Locking by means of a pawl or pawl-like tongue
• CPC Class Codes: Y10S 411/95 Rachet and nut-carried pawl
• CPC Class Codes: Y10S 411/951 Flexible

Abstract

The removal tool is used in connection with a locking nut and bolt system. The bolt thread has a plurality of notches generally longitudinally spaced in a predetermined pattern. The locking unit or element carries one or more tines. The tine has a distal tine end adapted to latch onto the lock face of the notch on the bolt and, when the distal tine end is not disposed in one or more notches, the tine end moves on the bolt thread crest. When the distal tine end is in the notch or notches, the lock face of the notch prevents counter-rotational movement of the bolt with respect to the nut when the distal tine end abuts the lock face. The locking unit supports the tine and may be cylindrical, rectangular or on a perpendicular support face normal to a radial plane through the axial centerline of the nut thread. The locking unit may be on a nut insert or may be carried on the leg of a U, J or S-shaped clip. The removal tool includes abase with a plurality of prongs insertible into the locking unit or element to keep the tine away from the bolt notches.

Claims

1. A removal tool and locking nut and bolt combination comprising:

a bolt with a bolt thread having a plurality of notches on said bolt thread;

a nut with a nut thread about a nut bore having an axial centerline, said nut thread complementary to said bolt thread;

a locking element operatively associated with said nut and having a locking element bore coaxial with respect to said axial centerline, said locking element including an elongated tine with a proximal tine body portion attached to said locking element and a distal tine end protruding inward toward said axial centerline and adapted to ride on said bolt thread and fall into at least one of said plurality of notches dependent upon a relative position of said distal tine end and said plurality of notches; and

a removal tool including a body with first and second ends, said first end configured and dimensioned to be received within said locking element bore and including a number of prongs,

wherein each prong is located intermediate said proximal tine body portion of said elongated tine and said bolt thread upon insertion of said first end in said locking element bore such that rotation of said body lifts said distal tine end away from said plurality of notches.

2. A combination as claimed in claim 1 wherein said locking element is carried on said nut.

3. A removal tool and locking nut and bolt combination as claimed in claim 1 wherein said body has a cylindrical shape.

4. A removal tool and locking nut and bolt combination as claimed in claim 1 wherein said first end of said body includes a plurality of cut-outs defining said prongs.

5. A removal tool and locking nut and bolt combination as claimed in claim 1 wherein said second end of said body is coupled to a head plate.

6. A removal tool and locking nut and bolt combination as claimed in claim 1 wherein said body has a cylindrical shape and said head plate has a diameter larger than said second end diameter.