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. 02, 1999
Filed:
Jun. 06, 1996
Irvine Cardno Brown, Aberdeen, GB;
Petroleum Engineering Services Limited, Dyce, GB;
Abstract
There is disclosed a ball valve (5) particularly for use in oil/gas wells. Known valves suffer from a number of problems, e.g such as high actuating forces and seat failure due to applied load across the ball being transferred through the seat. The present invention provides a ball valve (5) comprising a body (75) having a cylindrical bore containing a ball (10) and means for rotably mounting the ball (10) within the body (75) about a fixed axis, further comprising actuation means (15, 40, 45, 50) for controlling rotation of the ball (10), wherein in use to cause the ball (10) to rotate the actuation means (15, 40, 45, 50) is caused to move along a direction substantially parallel to an axis of the bore of the body (75).