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:
Oct. 11, 1988
Filed:
Dec. 08, 1987
Applicant:
Inventors:
Gert Braun, Essen-Heisingen, DE;
Ernst Braun, Essen-Heisingen, DE;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ; E21C / ;
U.S. Cl.
CPC ...
299 91 ; 175413 ; 403378 ; 407 47 ; 407102 ;
Abstract
A tool assembly for mining machines and particularly for coal planes or coal cutting machines comprises a cutter which has a shank portion which is engaged to a seat of a size comparable to the shank portion of a cutter holder and it is held in that position by a locking pin which extends through aligned bores of the holder and the shank portion which may be retracted into a knockout slot defined in the shank portion which is closed on each side by a portion of the cutter holder in an arrangement in which the locking pin may be retracted into the knockout slot for removal of the cutter.