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. 27, 1988
Filed:
Jun. 18, 1986
Applicant:
Inventors:
Naomasa Wakita, Aichi, JP;
Kanji Ohya, Aichi, JP;
Masatoshi Kuwata, Aichi, JP;
Shuzo Hattori, Aichi, JP;
Makoto Okuda, Aichi, JP;
Assignee:
NGK Spark Plug Co., Ltd., Aichi, JP;
Primary Examiner:
Int. Cl.
CPC ...
F16D / ;
U.S. Cl.
CPC ...
60476 ; 60473 ; 60493 ; 417315 ; 417322 ; 417412 ; 417505 ;
Abstract
A pulse-actuated hydraulic pump includes a hydraulic chamber with a bellows having a volume increased or decreased by the selective application a force in an axial direction thereof by a piezoelectric actuator. Control means control electrically-driven valves to selective discharge fluid from the bellows in precisely controllable volumes through a first pumping port or a second pumping port.