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US 5,538,807 AGranted
Vent valve for an amphibious equipment having a battery housing
AssigneeNikon Corporation
InventorNobuyoshi Hagiuda
Life of this patent
Estimating the term…
Abstract
A device usable in water includes a battery housing arranged in the device to house a battery, the battery housing having a common wall shared by an outer wall of the device, the common wall having an opening, a valve normally actuated by an actuation member to close the opening and opening the opening against the actuation member by a predetermined difference between a pressure in the battery housing and a pressure external of the equipment, and an air-permeable and liquid-impermeable filter arranged in the battery housing to cover the opening.
Claims7
A device usable in water, comprising:
- a battery housing arranged in said device to house a battery;
- said battery housing having a common wall shared by an outer wall of said device;
- said common wall having an opening;
- a valve urged by an urging member against said opening, said valve is opened by a difference between a pressure in said battery housing and a pressure external of said equipment;
- and
- an air-permeable and liquid-impermeable filter arranged in said battery housing to cover said opening.
3 more elements
Dependencies are inferred from the claim text.