Patent US3717078A successfully refreshed from Google Patents.
US3717078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure resistant underwater casing
Assignee: Fujifilm Holdings Corp
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Filing: 1971-04-02
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Granted: 1973-02-20
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Expires: 1991-04-02
Abstract
Abstract A housing or casing having a pressure balancing mechanism such as a diaphragm or bellows is filled with a suitable fluid, such as oil, to both prevent erosion and to permit the casing structure to be immune to the effects of ambient pressure. The casing is designed specifically to protect such devices as cameras used underwater.
Inventors
- 👤 S Ogura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:27
CPC Classifications
B; B63; B63C; B63C11/00; B63C11/52; G; G03; G03B; G03B17/00; G03B17/02; G03B17/08
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
100 words
The combination of an underwater camera and casing for its electrical power source and motor for use underwater comprising a housing member for enclosing the electrical power source and motor; pressure balancing means regulating the interior pressure within the housing member in accordance with the ambient pressure; a non-corrosive fluid filling the housing member and covering the electrical power source and motor; electrical connectors connecting the electrical power source and motor, and, a shaft extending from the motor through the housing in operative connection with the underwater camera whereby the electrical power source and motor are protected from the water.
Claim 2
Dependent Claim
100 words
The combination of an underwater camera and casing for its electrical power source and motor for use underwater comprising a housing member for enclosing the electrical power source and motor; pressure balancing means regulating the interior pressure within the housing member in accordance with the ambient pressure; a non-corrosive fluid filling the housing member and covering the electrical power source and motor; electrical connectors connecting the electrical power source and motor, and, a shaft extending from the motor through the housing in operative connection with the underwater camera whereby the electrical power source and motor are protected from the water.
Claim 3
Dependent Claim
14 words
The combination of claim 1, where the pressure balancing means is a flexible diaphragm.
Claim 4
Dependent Claim
16 words
The combination as claimed in claim 1, wherein said pressure balancing means comprises a bellows member.
Claim 5
Dependent Claim
12 words
The combination as claimed in claim 1, wherein said fluid is oil.
Claim 6
Dependent Claim
12 words
The combination as claimed in claim 1, wherein said fluid is gelatin.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-20 | 1976-08-21 | 1977-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-20 | 1980-08-21 | 1981-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-20 | 1984-08-21 | 1985-02-20 | $7700.00 | Window Closed / Lapsed |