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. 10, 2012
Filed:
Apr. 26, 2007
Akihiko Minato, Kanagawa, JP;
Terukazu Nishimura, Kanagawa, JP;
Takeshi Tokumaru, Kanagawa, JP;
Tsuneo Tanaka, Kanagawa, JP;
Akihiko Minato, Kanagawa, JP;
Terukazu Nishimura, Kanagawa, JP;
Takeshi Tokumaru, Kanagawa, JP;
Tsuneo Tanaka, Kanagawa, JP;
Isuzu Motors Limited, Tokyo, JP;
Abstract
To provide a variable valve driving device which can accurately control the lift amount of valves and can be manufactured at a low cost. The device has: valves () serving as intake valves or exhaust valves of an engine; springs () for biasing the valves () in the valve closing direction; a cam () for pressing the valves () in the valve opening direction against a biasing force of the springs; a piston () joined to the valves (); a control chamber () configured by a piston insertion hole () into which the piston () is inserted; and a control mechanism () for changing the valve closing timing of the valves () by controlling the introduction and discharge of a working fluid into and from the control chamber ().