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:
Nov. 22, 2016
Filed:
Sep. 30, 2010
Nicolas Alain Bader, Vaux le Penil, FR;
Regis Michel Paul Deldalle, Servon, FR;
Laurent Gilbert Yves Hodinot, Cesson, FR;
Nicolas Potel, Maisons Alfort, FR;
Nicolas Alain Bader, Vaux le Penil, FR;
Regis Michel Paul Deldalle, Servon, FR;
Laurent Gilbert Yves Hodinot, Cesson, FR;
Nicolas Potel, Maisons Alfort, FR;
SNECMA, Paris, FR;
Abstract
A fuel feed circuit for an aeroengine, the circuit including a high-pressure pumping system for delivering fuel at high pressure to combustion chamber injectors, the high-pressure pumping system including first and second positive displacement gear pumps driven simultaneously by the engine. A hydraulic switch member is interposed between respective outlets of the pumps, which makes it possible, in one state, to combine outlet flows from the two pumps to deliver fuel at high pressure to the combustion chamber injectors, and in another state, to discharge some or all of outlet flow from the first pump to a low-pressure feed line, an electrical control member serving to cause the hydraulic switch member to pass from one state to the other.