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:
Jan. 26, 1988
Filed:
Apr. 14, 1987
Tsutomu Ichinomiya, Hikone, JP;
Koichi Ishino, Hikone, JP;
Matsushita Electric Works, Ltd., Osaka, JP;
Abstract
A fluid pump has a pumping member which defines the boundary of a pump chamber and is driven to reciprocate between the positions of expanding and contracting the pump chamber for drawing in the pump chamber a fluid and feeding it into a vessel to be pressurized thereby. The pumping member is connected to the output shaft of a reversible motor through a driving linkage capable of translating the rotary motion of the output shaft into the reciprocating motion of the pumping member. A release valve is provided in a fluid path between the pump chamber and the vessel for rapidly releasing the pressurized fluid out of the vessel. The release valve is operatively connected to the motor output shaft through a release valve actuator which responds to the reversal of the motor for opening the release valve and has a delay mechanism providing a delayed response action in opening the release valve so that the initiation of opening the release valve is inhibited until the output shaft rotates in the reverse direction through an angle of more than 180 degrees from the reversing point, thereby inhibiting an unintended opening of the release valve due to the reverse translation of the reciprocating motion of the pumping member because of kickback by pressurized fluid in the pump chamber when the motor is stopped.