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:
Jan. 10, 2012
Filed:
Dec. 18, 2007
Applicant:
Francesco Vaghi, Cheltenham, GB;
Inventor:
Francesco Vaghi, Cheltenham, GB;
Assignee:
Schlumberger Technology Corporation, Sugar Land, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01D 1/30 (2006.01);
U.S. Cl.
CPC ...
Abstract
An impeller arrangement comprises an impellerhaving at least one first vane surfaceorientated such that the application of fluid under pressure thereto applies a torque to the impellerin a first rotary direction, at least one second vane surfaceorientated such that the application of fluid under pressure thereto applies a torque to the impellerin a second, opposite rotary direction, and a valveoperable to control the supply of fluid to the first and second vane surfaces