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:
May. 31, 2005
Filed:
Sep. 30, 2002
Xinshuang Nan, Bloomington, IL (US);
Sean Olen Cornell, Gridley, IL (US);
Scott Alan Leman, Eureka, IL (US);
Xinshuang Nan, Bloomington, IL (US);
Sean Olen Cornell, Gridley, IL (US);
Scott Alan Leman, Eureka, IL (US);
Caterpillar Inc, Peoria, IL (US);
Abstract
An engine valve actuation system may include an actuation assembly having a body, a slidable piston, and first, second, and third chambers defined between the piston and the body. Low pressure and high pressure fluid sources may be included. A first fluid passage may connect the low pressure fluid source to the second chamber. A second fluid passage may connect the high pressure fluid source to the second chamber, and a third fluid passage may connect the high pressure fluid source to the third chamber. A control valve may be connected to the low pressure fluid source, to the high pressure fluid source, and to the first chamber. The control valve may be configured to move between a first position at which the high pressure fluid source is connected to the first chamber, and a second position at which the low pressure fluid source is connected to the first chamber.