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:
Jun. 09, 1981
Filed:
Nov. 29, 1977
Applicant:
Inventors:
Donald Hatch, Whaley Bridge,, GB;
Christopher R Ellis, Chinley,, GB;
Richard H Gibbon, Chapel-en-le-Frith,, GB;
Walter R Stirling, Buxton, GB;
Assignee:
Ferodo Limited, , GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16D / ;
U.S. Cl.
CPC ...
1882 / ; 1882 / ; 1921 / ;
Abstract
Hydraulically-operable rotary friction brake comprising a retarding device incorporating hydraulically actuated operating members have a hydraulic circuit including a valve whereby in periods of operation a major portion of the hydraulic flow is directed through the hydraulically actuated operating members and in periods of non-actuation only a minor proportion of the hydraulic flow is directed through the operating members.
Hatch, Donald. (1981). Valves for hydraulic brakes (U.S. Patent No. 4271937). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4271937
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile