The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 24, 1987
Filed:
Dec. 30, 1985
Frank J Cosenza, Rolling Hills, CA (US);
Albert K Yamamoto, Huntington Beach, CA (US);
Rexnord Inc., Brookfield, WI (US);
Abstract
A helically coiled wire-type screw thread insert, of the type used for tapped holes in workpieces in which a fastener component is threaded into, is provided. The two free end coils (12) each have a hook means recess (14) on the inner screw thread of each, and the terminal end (16) of each free end coil (12) has a reduced transverse cross-section or a diminishing cross-sectional area construction. Further the outer thread pitch diameter (P1) of the free end coils (12A, 12B) is preferably less than that of the remaining coils (13'). The invention provides improved insertion capability and provides a removal capability unknown in the screw thread inserts of the prior art.