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:
Jul. 17, 1984
Filed:
Dec. 28, 1981
Robert J Turlak, Houston, TX (US);
Bolie C Williams, III, Houston, TX (US);
Gary R Schaeper, Houston, TX (US);
Cameron Iron Works, Inc., Houston, TX (US);
Abstract
An improved annular blowout preventer having a housing, an annular packer mounted in the housing, and a piston mounted in the housing for the application of an axial force to the annular packer; the annular packer includes a resilient annulus with a circular series of rigid interengaging inserts embedded in its upper face with the inner ends of the inserts being thicker than the outer ends so that the inner ends of the inserts move inward as the resilient annulus is moved and interengaging side projections and recesses with shoulders to ensure substantially uniform inward movement of the inner ends of the inserts to a preselected inner support position for the resilient annulus.