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. 23, 2010
Filed:
Sep. 12, 2006
Timothy M. O'shea, Chicago, IL (US);
Timothy M. O'Shea, Chicago, IL (US);
Val-Matic Valve & Manufacturing Corp., Elmhurst, IL (US);
Abstract
A valve actuator including a body, a rotatable drive screw having an external thread over at least a portion of its length and extending through the body and projecting out at least one side of the body. An internally threaded member is captured on the drive screw on the interior of the body, the member being held against rotation during rotation of the drive screw, so as to cause the member to travel along a length of the drive screw as the drive screw is rotated in both a first and second rotational direction. At least one sleeve having an abutment surface engagable by the member upon a sufficient rotation of the drive screw in one of the two directions. The sleeve surrounds the drive screw and may be axially adjustable relative to the drive screw from the exterior of the body. The sleeve may be threadingly engaged with the drive screw and slidingly carried in the body such that a load created by the threaded member pressing against the abutment surface of the sleeve is transferred from the sleeve to the drive screw as a tensile load.