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:
Feb. 05, 1991
Filed:
May. 31, 1989
Michael J Lynch, Duncan, OK (US);
G Allen Turner, Duncan, OK (US);
Mark Ehlert, Duncan, OK (US);
Jim B Surjaatmadja, Duncan, OK (US);
Halliburton Company, Duncan, OK (US);
Abstract
A pressure control apparatus suitable for controlling pressures in autoclaves permits a plurality of autoclaves to be selectably pressurized from a single pressurizing circuit. The apparatus can be externally controlled to more efficiently multiplex autoclaves to the pressurizing circuit and to more efficiently implement different pressure schedules for the autoclaves. Once a pressure has been set for an autoclave maintained in communication with the main pressurizing circuit, the apparatus automatically monitors the position of the pump piston and resets it from either of its extreme limits of movement to maintain pressure at a desired set point. Corresponding methods are also disclosed.