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:
Aug. 28, 2012
Filed:
Sep. 23, 2008
Dennis R. Smith, Tulsa, OK (US);
Eric N. Freeman, Kiefer, OK (US);
Graham Christopher Stilwell, Swindon, GB;
Charles Culver Gidden Cooper, Arvada, CO (US);
Gregory Allen Langley, Arvada, CO (US);
Scott Douglas Nelson, Denver, CO (US);
Dennis R. Smith, Tulsa, OK (US);
Eric N. Freeman, Kiefer, OK (US);
Graham Christopher Stilwell, Swindon, GB;
Charles Culver Gidden Cooper, Arvada, CO (US);
Gregory Allen Langley, Arvada, CO (US);
Scott Douglas Nelson, Denver, CO (US);
TDW Delaware Inc., Wilmington, DE (US);
Abstract
A closure device includes a door carrying a series of interconnected shear blocks and a keystone shear block designed to transfer stresses created by pressure acting on the door to a surrounding hub. Each interconnected shear block has a limited rotation relative to its adjacent blocks. A holding band operating handle is in communication with a driving link which, in turn, is in communication with the keystone shear block. Actuating the handle causes the keystone shear block to move in an upward vertical direction. The linear movement of the keystone shear block allows the limited rotation of the interconnected shear blocks to occur, thereby causing the circumferential holding band to collapse within itself from an expanded-engaged position to a contracted-removed position relative to said hub. A pressure warning lock provides a safety device and prevents actuation of the holding band operating handle when the pressure chamber is under pressure.