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:
Aug. 23, 2011
Filed:
Mar. 18, 2005
Alben F. Puhlick, Westerly, RI (US);
Susan J. Russell, Pawcatuck, CT (US);
James R. Dick, Pawcatuck, CT (US);
Hartwell L. Gauthier, Jr., Plainfield, CT (US);
Alexander P. Karpinski, North Stonington, CT (US);
Alben F. Puhlick, Westerly, RI (US);
Susan J. Russell, Pawcatuck, CT (US);
James R. Dick, Pawcatuck, CT (US);
Hartwell L. Gauthier, Jr., Plainfield, CT (US);
Alexander P. Karpinski, North Stonington, CT (US);
Yardney Technical Products, Inc., Pawcatuck, CT (US);
Abstract
A liquid retaining pressure relief valve for electrochemical battery cells is provided including a pressure regulator and a membrane vent that are mounted to the top and bottom ends of a threaded valve housing or plug. The valve housing or plug screws into the cell cover from the outside of the cell such that the membrane vent is internal to the cell. The membrane vent includes a thin gas permeable liquid repellant membrane that is molded into the body of the vent. The membrane is preferably composed of an expanded polytetraflouroethylene (ePTFE) polymer.