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:
Apr. 12, 1977
Filed:
Jun. 06, 1975
Maurice Slegers, Lakewood, CA (US);
John D Muchow, Cerritos, CA (US);
Willis Oil Tool Co., Long Beach, CA (US);
Abstract
A housing structure confines a ball-shaped valve member with a flow passage therethrough. One end of the flow passage serves as a cavity to receive a pipeline scraper in the form of a pig ball and a grid retains the pig ball while permitting fluid flow through the passage. The valve ball cavity may register with the chamber of a normally closed magazine to receive a pig ball therefrom or to release a pig ball thereto. The valve ball cavity may also register with one of the two ports of the housing structure to launch or retrieve a pig ball therethrough. The valve ball is completely enclosed by the housing structure with a seal at the entrance to the magazine. The magazine has a bleeder valve to the atmosphere and also has a by-pass valve to equalize the fluid pressure in the magazine with the fluid pressure in the pipeline. The valve ball has compensating freedom to move towards and away from the seal. Manually operable gearing rotates the valve ball 90.degree. between its two alternate positions.