Patent US3805818A successfully refreshed from Google Patents.
US3805818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety valve device to be automatically closed by vibrations
Assignee: Individual
•
Filing: 1972-10-17
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Granted: 1974-04-23
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Expires: 1992-10-17
Abstract
Abstract A safety valve device is automatically closed upon the occurrence of sudden vibrations such as an earthquake. The device includes a weight in a housing, which may be shifted due the vibrations so as to close the housing through an actuating arm.
Inventors
- 👤 M Yamada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:28
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/36; H; H01; H01H; H01H35/00; H01H35/14; H01H35/144; Y; Y10; Y10T; Y10T137/00; Y10T137/0753
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
189 words
A safety valve decice comprising: a housing having a main chamber and two openings through which a fluid energy medium passes; a valve mechanism provided in the housing for selectively preventing the passage of the energy medium through the housing, said valve mechanism including a reciprocal shaft mounted coaxial with said openings, a closing member mounted on one end of said reciprocal shaft, a spring receiving member mounted on said reciprocal shaft, and a compression spring urging said reciprocal shaft toward the other end of said reciprocal shaft to close a first of the openings with said closing member; an actuating arm in said housing and coupled to said closing member of the valve mechanism to selectively move said closing member to the closed state, one end of said arm being pivoted on said spring receiving member, and said arm having an engaging portion engagable with the housing to selectively open said first opening against the force of the compression spring; and a weight member which is shiftable in position responsive to vibrations for actuating said arm by being shifted when vibrated to thereby cause said arm to pivot.
Claim 2
Dependent Claim
189 words
A safety valve decice comprising: a housing having a main chamber and two openings through which a fluid energy medium passes; a valve mechanism provided in the housing for selectively preventing the passage of the energy medium through the housing, said valve mechanism including a reciprocal shaft mounted coaxial with said openings, a closing member mounted on one end of said reciprocal shaft, a spring receiving member mounted on said reciprocal shaft, and a compression spring urging said reciprocal shaft toward the other end of said reciprocal shaft to close a first of the openings with said closing member; an actuating arm in said housing and coupled to said closing member of the valve mechanism to selectively move said closing member to the closed state, one end of said arm being pivoted on said spring receiving member, and said arm having an engaging portion engagable with the housing to selectively open said first opening against the force of the compression spring; and a weight member which is shiftable in position responsive to vibrations for actuating said arm by being shifted when vibrated to thereby cause said arm to pivot.
Claim 3
Dependent Claim
86 words
The safety valve device according to claim 1 wherein said housing has a weight member accomodating chamber partitioned from the main chamber by a partition wall on which the weight member is set and said arm has a curved end passing through the partition wall and extended into the weight member accommodating chamber to face the weight member, whereby when the weight member is shifted, the curved portion receives the weight member and the engagement of the arm and housing is released to close the opening.
Claim 4
Dependent Claim
33 words
The safety valve device according to claim 2 wherein the partition wall has a receiving hole and the weight member comprises a spherical weight positioned in the receiving hole of the partition wall.
Claim 5
Dependent Claim
24 words
The safety valve device according to claim 3 which further includes returning means returning the reciprocal shaft to a position to open the opening.
Claim 6
Dependent Claim
73 words
The safety valve device according to claim 4 wherein said returning means includes a manually operable swingable lever positioned outside the housing, a rotatable shaft connected to the lever at one end and having the other end extending into the housing and a connecting rod to connect the reciprocal shaft and the other end of the rotatable shaft whereby when the lever is swung the reciprocal shaft is moved to open the opening.
Claim 7
Dependent Claim
45 words
The safety valve device according to claim 5 wherein the spring receiving member is a box member through which the reciprocal shaft is slidably inserted and in which a second compression spring is mounted to urge the reciprocal shaft and box member in opposite directions.
Claim 8
Dependent Claim
45 words
The safety valve device according to claim 1 wherein the spring receiving member is a box member through which the reciprocal shaft Is slidably inserted and in which a second compression spring is mounted to urge the reciprocal shaft and box member in opposite directions.
Claim 9
Dependent Claim
30 words
The safety valve device according to claim 7 wherein said second compression spring urges the reciprocal shaft member in a direction opposite the urging direction of said first-mentioned compression spring.
Claim 10
Dependent Claim
25 words
The safety valve device according to claim 7 wherein said second compression spring determines the force with which said closing member closes said first opening.
Claim 11
Dependent Claim
23 words
The safety valve device according to claim 1 wherein said spring receiving member is mounted near said other end of said reciprocal shaft.
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) | 1977-04-22 | 1977-10-22 | 1978-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-22 | 1981-10-22 | 1982-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-22 | 1985-10-22 | 1986-04-23 | $7700.00 | Window Closed / Lapsed |