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. 25, 2006
Filed:
Feb. 24, 2004
Brent L. Bristol, Phoenix, AZ (US);
Louie T. Gaines, Phoenix, AZ (US);
William A. Facinelli, Phoenix, AZ (US);
David M. Mathis, Phoenix, AZ (US);
Brent L. Bristol, Phoenix, AZ (US);
Louie T. Gaines, Phoenix, AZ (US);
William A. Facinelli, Phoenix, AZ (US);
David M. Mathis, Phoenix, AZ (US);
Honeywell International, Inc., Morristown, NJ (US);
Abstract
An air turbine starter is provided that includes a check valve assembly for placement between a first environment, at least a portion of which is at a first pressure (P), and a second environment, at least a portion of which is at a second pressure (P), wherein the difference between the first and second pressures generate a pressure force (F). The check valve assembly comprises a valve element disposed between the valve seat and the valve body, the valve element capable of being acted upon by a gravitational force (F), a viscous force of the fluid to be communicated between the gearbox assembly and the starter housing (F), a buoyancy force of the valve element (F), and the pressure force on the valve element (F), the valve element further configured to translate axially to a closed position when P<Pand F<F+F+F.