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:
Sep. 19, 1989
Filed:
Oct. 30, 1987
Applicant:
Inventors:
James A Maass, Lexington, SC (US);
John F Stewart, Lexington, SC (US);
Joseph F Carter, Lexington, SC (US);
Assignee:
Cooper Industries, Inc., Houston, TX (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23B / ;
U.S. Cl.
CPC ...
408 17 ;
Abstract
An improvement to an air logic circuit for an airfeed peck drill includes the insertion of a retract valve between the command valve and the air motor. This retract valve generates a required signal to only allow the drill quill to feed forward after it has been fully retracted