Patent US4331171A successfully refreshed from Google Patents.
US4331171A
Expired / Lapsed
US
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Earthquake shut-off valve for gas line
Assignee: Individual
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Filing: 1981-05-15
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Granted: 1982-05-25
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Expires: 2001-05-15
Abstract
Abstract Earthquake tremors dislodge a pedestal-mounted ball which then blocks the outlet passage of a casing installed in a gas line. To make the device more sensitive, the pedestal is spring-supported in the casing. Further, several balls may be suspended from wires in such position that, when they sway because of tremor, they knock the shut-off ball from the pedestal. The ball may be knocked from the pedestal in an emergency by kicking or rapping it. Additionally, the pedestal may be mounted on horizontal ball bearings with an adjustable compressive force which makes the shut-off ball especially sensitive both to vertical and horizontal tremors. In a severe emergency, such as an earthquake, the device saves lives and property by minimizing potential leakage and explosion from ruptured pipes.
Inventors
- 👤 Sam Novi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:53
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/36; F16K17/366; Y; Y10; Y10T; Y10T137/00; Y10T137/0753; Y10T137/0923
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
101 words
In a valve of the type operable to shut off fluid flow following earthquake tremors comprising a casing having a fluid inlet port and a fluid outlet port at the bottom of said casing, a first ball, a pedestal supported in said casing normally supporting said first ball above said outlet port, said first ball being dimensioned to close off said outlet port when dislodged from said pedestal, the improvement which comprises at least one second ball, means mounting said second ball within said casing for movement initiated by tremors in a path to dislodge said first ball from said pedestal.
Claim 2
Dependent Claim
101 words
In a valve of the type operable to shut off fluid flow following earthquake tremors comprising a casing having a fluid inlet port and a fluid outlet port at the bottom of said casing, a first ball, a pedestal supported in said casing normally supporting said first ball above said outlet port, said first ball being dimensioned to close off said outlet port when dislodged from said pedestal, the improvement which comprises at least one second ball, means mounting said second ball within said casing for movement initiated by tremors in a path to dislodge said first ball from said pedestal.
Claim 3
Dependent Claim
42 words
A valve according to claim 1 in which said means comprises a filament attached at its lower end to said second ball and a support for the upper end of said filament, said support being fixed to the inside of said casing.
Claim 4
Dependent Claim
19 words
A valve according to claim 1 in which said second ball is below the level of said first ball.
Claim 5
Dependent Claim
28 words
A valve according to claim 1 which further comprises at least one third ball supported in the manner of said second ball and displaced from said second ball.
Claim 6
Dependent Claim
23 words
A valve according to claim 1 which further comprises a flexible support for said pedestal which permits said pedestal to vibrate during tremors.
Claim 7
Dependent Claim
18 words
A valve according to claim 1 which further comprises a downwardly converging resilient throat at said outlet port.
Claim 8
Dependent Claim
36 words
A valve according to claim 1 in which said casing is formed in two parts, with a fluid-tight joint to permit access to the interior of said valve to re-set said first ball on said pedestal.
Claim 9
Dependent Claim
86 words
A valve according to claim 7 in which a first said part is formed with a circular first flange, said first flange being formed with a circumferential groove having a bottom and inwardly converging sides, and a second said part is formed with a circular second flange, said second flange being formed with a bead complementary to said groove and which further comprises means for drawing said flanges together to seal said bead and groove together, said flanges and said last-mentioned means comprising said fluid-tight joint.
Claim 10
Dependent Claim
51 words
A valve according to claim 1 in which said pedestal comprises a concave member complementary to the bottom of said first ball, an upward-concave cup, a plurality of ball bearings in said cup supporting said concave member, and resilient means biasing said cup and concave member together with said ballbearings interposed.
Claim 11
Dependent Claim
28 words
A valve according to claim 8 in which the force of said resilient means is adjustable to adjust the sensitivity of said concave member to tilting during tremors.
Claim 12
Dependent Claim
115 words
In a valve of the type operable to shut off fluid flow following earthquake tremors comprising a casing having a fluid inlet port and a fluid outlet port at the bottom of said casing, a ball, a pedestal for said ball supported in said casing and support means for said pedestal, said ball being dimensioned to close off said outlet port when dislodged from said pedestal, the improvement in which said support means comprises a concave member complementary to the bottom of said ball, an upward concave cup, a plurality of ball bearings in said cup supporting said concave member, and resilient means biasing said cup and concave member together with said ball bearings interposed.
Claim 13
Dependent Claim
115 words
In a valve of the type operable to shut off fluid flow following earthquake tremors comprising a casing having a fluid inlet port and a fluid outlet port at the bottom of said casing, a ball, a pedestal for said ball supported in said casing and support means for said pedestal, said ball being dimensioned to close off said outlet port when dislodged from said pedestal, the improvement in which said support means comprises a concave member complementary to the bottom of said ball, an upward concave cup, a plurality of ball bearings in said cup supporting said concave member, and resilient means biasing said cup and concave member together with said ball bearings interposed.
Claim 14
Dependent Claim
29 words
A valve according to claim 11 in which the force of said resilient means is adjustable to adjust the sensitivity of said concave member to tilting during earthquate tremors.
Claim 15
Dependent Claim
76 words
A valve according to claim 11 in which said cup member is formed with an aperture, a first hook on the bottom of said cup extending through said aperture, a stem, a second hook on the upper end of said stem engaging said first hook, a pedestal support fixed to said casing and formed to engage the lower end of said stem and a spring surrounding said stem between said pedestal support and said cup member.
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) | 1985-05-24 | 1985-11-23 | 1986-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-24 | 1989-11-23 | 1990-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-24 | 1993-11-23 | 1994-05-25 | $7700.00 | Window Closed / Lapsed |