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:
Mar. 07, 1978
Filed:
Oct. 14, 1976
Applicant:
Inventors:
Louis Emile Martin, Senlis, FR;
Antoine Theodore Mauboussin, Montfermeil, FR;
Assignee:
Societe Anonyme Poclain Hydraulics, Verberie, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K / ; F15B / ;
U.S. Cl.
CPC ...
13759614 ; 13759616 ; 91459 ;
Abstract
A servo-operated fluid flow control valve includes a valve body housing a main valve which defines with the body an inlet chamber, an exhaust chamber, and a control chamber. An auxiliary valve is interposed between the control and exhaust chambers and is movable relative to the main valve by a jack controlled by a regulator. The arrangement is such that when the auxiliary valve is closed, the inlet and control chambers are in communication, and when the auxiliary valve is open, the control and exhaust chambers are in communication while the inlet and control chambers are isolated from each other.