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:
Oct. 20, 2009
Filed:
Feb. 14, 2007
Gene F. Haas, Camarillo, CA (US);
John W. Ryan, Carpenteria, CA (US);
Nicholas M. Rocksvold, Santa Paula, CA (US);
William F. Tandrow, Simi Valley, CA (US);
Gene F. Haas, Camarillo, CA (US);
John W. Ryan, Carpenteria, CA (US);
Nicholas M. Rocksvold, Santa Paula, CA (US);
William F. Tandrow, Simi Valley, CA (US);
Haas Automation, Inc., Oxnard, CA (US);
Abstract
A linear actuator for a rotating shaft assembly includes a cylinder and a piston arranged within a cavity defined by the cylinder. Faces of the piston delimit first and second chambers within the cavity. A rotatable shaft fixed to the piston defines a first main passage in fluid communication with the first chamber and a second main passage in fluid communication with the second chamber. A pressure delivery body rotatably fixed to the rotatable shaft defines a first delivery passage in fluid communication with the first main passage and a second delivery passage in fluid communication with the second main passage. A passage isolation system selectively isolates fluid communication between the first delivery passage and the first main passage and fluid communication between the second delivery passage and the second main passage. A pressure limiting system selectively blocks fluid communication through the first and second main passages.