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. 03, 2002
Filed:
Nov. 08, 2000
Lance Scott Hathcock, Jackson, TN (US);
Ingersoll-Rand Company, Woodcliff Lake, NJ (US);
Abstract
A check valve is provided for stopping the reverse flow of fluid through a fluid-carrying conduit and includes a fluid dampening device to dampen the closing movement of the valve upon flow reversal. The fluid dampening device includes a member for containing a fluid that becomes compressed upon a reverse flow of fluid through a conduit that houses the check valve. As the check valve is forced by a reverse fluid flow in a reverse direction, fluid in the fluid dampening device becomes compressed and is permitted to slowly seep out of the fluid dampening device via fluid passageways that permit only the slow escape of fluid from a compressed fluid chamber.