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. 09, 1996
Filed:
Dec. 20, 1994
Robert A Prok, Columbia Station, OH (US);
Eveready Battery Company, Inc., St. Louis, MO (US);
Abstract
An electrochemically operated device such as a portable lantern, with a waterproof housing enclosing at least one galvanic battery cell which evolves hydrogen gas, and a push button switch in the housing, a shiftable boot exposed to the housing exterior and aligned on the interior with the switch, a hydrogen recombination pellet in the housing, and a pellet retainer retaining the pellet, the housing including an elastomeric septum between its interior and exterior, having a sphincter orifice therethrough of a size to be elastomerically squeezed closed except under a predetermined pressure differential thereacross, to thereby prevent water entry to the housing, but to open to allow hydrogen gas escape from the housing at a pressure differential across the septum. The boot is resilient and the elastomeric septum preferably forms a part of the boot.