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. 11, 2005
Filed:
Apr. 03, 2002
Lemuel T. York, Montgomery, TX (US);
Allan S. Richardson, Spring, TX (US);
Beat Kuttel, Spring, TX (US);
Lemuel T. York, Montgomery, TX (US);
Allan S. Richardson, Spring, TX (US);
Beat Kuttel, Spring, TX (US);
Other;
Abstract
A valve actuator is provided in which a complementary set of pinions, each driven by a pair of racks, are located on opposite sides of the valve to be actuated. The racks are part of an annular bearing assembly and are coupled to one another through a hydraulic cylinder or some other displacement device. A pinion retaining sleeve is provided to shield the racks and pinions and prevents parts of the valve actuator from being thrown in operation. The piston retaining sleeve may include a maintenance aperture for installing or repairing a pinion and a second aperture for viewing the rotation of the pinion. The bearing assemblies each include a bearing housing and a bearing retainer that cooperate to shield the bearing assembly.