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:
Nov. 17, 1992
Filed:
Mar. 27, 1992
Aisin Seiki Kabushiki Kaisha, Kariya, JP;
Abstract
A hydraulic valve lifter having function to stop valve drive comprises a cylinder, a lifter body sliding in the cylinder, a cam driving the lifter body, a tappet sliding in the lifter body, a valve driven by the tappet, a plunger located between the lifter body and the tappet, a reservoir formed in the lifter body and being in fluid communication with a hydraulic source always, a first pressure room formed in the tappet and separated from the reservoir via the plunger, a check valve controlling a communication between the reservoir and the first pressure room, a piston sliding in the lifter body and having a rod driving the check valve, a second pressure room located at one side of the piston and being in fluid communication with the hydraulic source via a control valve, a room located at the other side of the piston, and a passage decreasing a pressure in the room.