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:
Nov. 14, 1989
Filed:
Jun. 06, 1988
Applicant:
Inventor:
Frederick J Herridge, Buckinghamshire, GB;
Assignee:
Anderson Strathclyde PLC, High Wyconbe, GB;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21C / ;
U.S. Cl.
CPC ...
279 79 ; 299 92 ;
Abstract
A combination of a cutting tool (10) and a holder (14) defining a socket (13) for receiving a shank (12) of the cutting tool, wherein the shank includes a slot (17) extending transversely to its longitudinal axis, an elongate locking bar (20) mounted in the slot and projecting therefrom, and resilient means (19) biassing the bar into its projecting position and wherein the holder includes an elongate abutment member 21 releasably connected thereto and co-operable with the locking bar to retain the shank within the socket.