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:
Jul. 02, 2019
Filed:
Aug. 25, 2015
Carrier Corporation, Jupiter, FL (US);
Russell G. Lewis, Manlius, NY (US);
James S. Brissenden, Baldwinsville, NY (US);
Carrier Corporation, Palm Beach Gardens, FL (US);
Abstract
An internal gear pump () comprises: a rotor/torque ring comprising an internally lobed () rotor () and a torque ring () extending beyond at least a first end () of the rotor; an externally lobed () idler () encircled by the rotor; a hollow shaft () supporting the idler; a pressure relief element () positioned to shift between a first condition and a second condition; and a spring () biasing the pressure relief element toward the first condition from the second condition. The torque ring has at least one pressure relief port (A,B) positioned so that: in the first condition, the pressure relief element blocks a path from an interior volume () of the pump to the pressure relief port; and in the second condition, relative to the first condition the pressure relief element does not block the path.