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:
Sep. 12, 2017
Filed:
Jul. 10, 2013
Stanadyne Corporation, Windsor, CT (US);
Robert G. Lucas, Ellington, CT (US);
Yevgeniy Norkin, Longmeadow, MA (US);
Stanadyne LLC, Windsor, CT (US);
Abstract
The pump delivered pressure is regulated to a substantially constant set value, and output flow is varied by an inlet metering valve () via feedback from the motion of, or flow from the spilled fuel through, a delivered pressure regulator (). The pressure regulating element can be biased to close a seal surface (') against flow from the outlet side of the pump () toward the inlet metering valve when the pump is turned off, thereby holding sufficient rail pressure to prevent boiling during hot soak conditions. In another aspect, a flow stabilization orifice () is provided between the outlet of the pump and the inlet metering valve, e.g., upstream of the pressure regulating element. In yet a further aspect, the inlet metering valve is hydraulically responsive (, S, L) to changes in flow resulting from movement of the pressure responsive element ().