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. 29, 1981
Bolie C Williams, III, Houston, TX (US);
Richard M Church, Jr, Patterson, LA (US);
Cameron Iron Works, Inc., Houston, TX (US);
Abstract
An annular blowout preventer having a housing with a vertical bore therethrough, a packer within the housing including a resilient annulus and upper and lower series of irising metal inserts adapted to increase the support for the annulus when it is deformed axially and extended radially to constrict the vertical bore, a support ring in the annulus under the outer ends of the irising metal inserts to support against upward movement of the inner ends of the inserts on closing of the annulus and an annular piston movable in the housing to apply an axial deformation load to the packer to move it to closed position sealing the bore.