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. 04, 2003
Filed:
Apr. 04, 2001
Henning Hansen, Randaberg, NO;
Frode Kaland, Stavanger, NO;
Weatherford/Lamb, Inc., Houston, TX (US);
Abstract
A switch device ( ) which sequentially conducts one hydraulic fluid stream ( ) to two or more independently operated hydraulic units, where the switch device ( ) with one or more channel throughputs ( and ) travels helically in a holding cylinder and transfers pressure streams in rotational sequence via fixed channels ( and ) in the holding cylinder to separately operated hydraulic devices. With activation and deactivation in succession with alternate pressure and pressure relief combined with corresponding spring device ( ), the switch device ( ) in the surrounding cylinder is simultaneously forced to perform a one-way helical and axial forward and backward movement, resulting in altered fluid communication. Full switch rotation is achieved with, for example, six equiangular waves, each at 60°, or with six different angular waves, such as 90°+60°+45°+60°+60°+45°.