US3771177A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-contained drain valve
Assignee: LSP Specialty Products Co
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Filing: 1971-07-12
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Granted: 1973-11-13
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Expires: 1991-07-12
Abstract
Abstract A drain valve for sealing a conduit comprising a resilient boot including a sealing surface for biasing an actuator and the sealing surface away from a second sealing surface. The actuator is held in a sealing position by a latch and is released by disengaging pressure on the actuator releasing the latch and allowing the resilient boot to return the actuator to its nonsealing position.
Inventors
- 👤 C Rogers
- 👤 G Hetzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:54
CPC Classifications
A; A47; A47K; A47K1/00; A47K1/14; E; E03; E03C; E03C1/00; E03C1/12; E03C1/22
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
82 words
A drain valve for selectively sealing a conduit comprising: a first sealing surface, resilient means comprising a tubular portion surrounding latching means for biasing an actuator means and a second sealing surface away from said first sealing surface, said latching means for releasably latching and holding said actuator means against the bias of said resilient means and holding said first and second sealing surfaces in contact, and said actuator means having means for transmitting force to latch and unlatch said latching means.
Claim 2
Dependent Claim
82 words
A drain valve for selectively sealing a conduit comprising: a first sealing surface, resilient means comprising a tubular portion surrounding latching means for biasing an actuator means and a second sealing surface away from said first sealing surface, said latching means for releasably latching and holding said actuator means against the bias of said resilient means and holding said first and second sealing surfaces in contact, and said actuator means having means for transmitting force to latch and unlatch said latching means.
Claim 3
Dependent Claim
17 words
The valve of claim 1 wherein, said second sealing surface comprises a portion of said resilient means.
Claim 4
Dependent Claim
33 words
The valve of claim 1 wherein, said tubular portion comprises a thin walled cylindrical means for bulging adjacent its lower end to accommodate movement of said actuator and to produce a return bias.
Claim 5
Dependent Claim
19 words
The valve of claim 1 wherein, said second sealing surface comprises a circumferential radially extending skirt of flexible material.
Claim 6
Dependent Claim
37 words
The valve of claim 1 further including, a conduit, said latching means being secured within said conduit, and said first and second sealing surfaces comprising conduit seal means for preventing the flow of fluid through said conduit.
Claim 7
Dependent Claim
74 words
The valve of claim 1 wherein, said latching means comprises an elongated guide pin having a latching section spaced from a first end thereof, said actuator means having a tubular extension received within said tubular portion of said resilient means, and said tubular extension having a guide pin receiving bore and an actuator mounted latching means for cooperating with said latching section of said guide pin to hold said actuator in a sealing position.
Claim 8
Dependent Claim
28 words
The valve of claim 6 wherein, said latching means comprises a protruding element within said tubular extension, and said latching section comprises means for receiving said protruding element.
Claim 9
Dependent Claim
22 words
The valve of claim 7 wherein, said bore is substantially larger than said guide pin in at least one cross sectional dimension.
Claim 10
Dependent Claim
26 words
The valve of claim 7 wherein, said guide is constrained by the walls of said bore against relative rotation about the long axis of said bore.
Claim 11
Dependent Claim
59 words
The valve of claim 7 wherein, said guide pin includes a ramp means intermediate said latching section and said section end of said guide pin for guiding said protruding element toward said means for receiving said protruding element, and said guide pin having a pivot protrusion means adjacent said second end for providing a pivot point for said actuator.
Claim 12
Dependent Claim
75 words
An article for use in a valve comprising, a unitary piece of thin walled resilient material having a tubular section, said tubular section Terminating at its upper end in an upper sealing means for sealing against a valve actuator, and at its lower end in a lower sealing means for sealing against a latching means, and said unitary piece also including a circumferential radially extending flexible skirt adjacent said upper end of said tubular section.
Claim 13
Dependent Claim
75 words
An article for use in a valve comprising, a unitary piece of thin walled resilient material having a tubular section, said tubular section Terminating at its upper end in an upper sealing means for sealing against a valve actuator, and at its lower end in a lower sealing means for sealing against a latching means, and said unitary piece also including a circumferential radially extending flexible skirt adjacent said upper end of said tubular section.
References Cited (Backward Citations)
CA705565A
Cited
US2173529A
Cited
FR1216197A
Cited
US3366980A
Cited
US3380081A
Cited
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Cited
US3428295A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |