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:
Jul. 25, 1995
Filed:
Mar. 11, 1993
Applicant:
Inventor:
Martin J Murphy, Buckinghamshire MK18 3LL, GB;
Assignee:
Other;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23G / ;
U.S. Cl.
CPC ...
470 25 ;
Abstract
A method of making a threaded hole in a component includes the steps of inserting into a preformed hole a cold forming tool comprising spaced apart threaded forming rings, a main passage for the passage of fluid extending through the tool, and branch passages leading from the main passage to outlets between adjacent thread forming rings, and directing pressure resistant lubricant fluid to flow under pressure through the passages to the outlets between adjacent rings into a gap between the tool and the wall of the hole to be threaded to cause the threads to be formed by displacement and deformation of the component material by the pressurized fluid.