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:
Mar. 11, 2008
Filed:
Mar. 15, 2005
Charles Conrad Klose, Plainfield, IL (US);
Randall James Strauss, Colorado Springs, CO (US);
Oded Eddie Sturman, Woodland Park, CO (US);
James A. Peña, Encinitas, CA (US);
Charles Conrad Klose, Plainfield, IL (US);
Randall James Strauss, Colorado Springs, CO (US);
Oded Eddie Sturman, Woodland Park, CO (US);
James A. Peña, Encinitas, CA (US);
Sturman Industries, Inc., Woodland Park, CO (US);
Abstract
Hydraulic valve actuation systems and methods to provide multiple lifts for engine valves using fixed or hard stops at each lift. The fixed or hard stops provide a very repeatable selection of engine valve lifts dependent on engine operating conditions. For full valve lift, unidirectional hydraulic dashpots are used to decelerate the engine valve, both as it approaches the full lift fixed stop, and as the engine valve approaches the valve seat from the engine valve full lift position. Various embodiments and methods of operation are disclosed.