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. 03, 2017
Filed:
Oct. 08, 2014
Keith Hampton, Ann Arbor, MI (US);
David E. Fletcher, Flint, MI (US);
Brian M. Graichen, Leonard, MI (US);
Rex Bravo, Detroit, MI (US);
Matt Gilmer, Whitmore Lake, MI (US);
Andrew Niedert, New Hudson, MI (US);
Keith Hampton, Ann Arbor, MI (US);
David E. Fletcher, Flint, MI (US);
Brian M. Graichen, Leonard, MI (US);
Rex Bravo, Detroit, MI (US);
Matt Gilmer, Whitmore Lake, MI (US);
Andrew Niedert, New Hudson, MI (US);
DAYCO IP HOLDINGS, LLC, Troy, MI (US);
Abstract
Check valve units having one or more sound attenuating members are disclosed. A check valve unit includes a housing defining an inlet port, an outlet port, and a chamber in fluid communication therewith thereby defining a flow path from the inlet port through the chamber to the outlet port. The chamber includes first and second valve seats and has a sealing member disposed therein that is moveable from a position seated on the first valve seat to a position seated on the second valve seat. A sound attenuating member is disposed in the flow path downstream of the chamber, within the chamber, or both. In another embodiment, the check valve unit includes a Venturi portion in fluid communication with the chamber. The Venturi portion has a fluid junction with the flow path downstream of the chamber or forms the discharge section of the Venturi portion thereby defining the outlet port.