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. 08, 1985
Filed:
Oct. 22, 1982
Applicant:
Inventor:
Alan D Jackson, Hutchinson, KS (US);
Assignee:
The Cessna Aircraft Company, Wichita, KS (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F15B / ; F15B / ;
U.S. Cl.
CPC ...
91420 ; 91445 ;
Abstract
A metering lockout check valve which lowers gravity loads without chatter. The poppet has a conical concave face which surrounds an annular seat and is shaped so that as the poppet opens, the effective closing force increases requiring higher pressures in the opposite motor port to open the poppet. Conversely an overrun condition is prevented since when the pressure drops in the pump pressure side of the circuit, the poppet will reduce its opening and provide a metering function.