Patent US3905392A successfully refreshed from Google Patents.
US3905392A
Expired / Lapsed
US
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Alarm check valve
Assignee: HODGMAN Manufacturing CO Inc
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Filing: 1974-07-29
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Granted: 1975-09-16
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Expires: 1994-07-29
Abstract
Abstract An alarm clock valve for use in an automatic sprinkler system has an apertured cone-shaped support member mounted within a section of pipe, a resilient diaphragm that seats on the interior surface of the support member to permit a flow of water in only one direction, and outlet means for directing a portion of the flow to sound an alarm. In one form, the support member has a flanged portion formed at its base and the outlet means is an annular groove formed on the interior surface of the flanged portion. In another form, the outlet means is an annular chamber formed by a sealing member that extends between the exterior surface of the support member and interior surface of the pipe. In the latter form, water enters the chamber through at least one aperture located in the portion of the support member forming a wall of the chamber. During a flow of water through the valve, a portion of the flow enters the groove or chamber and exits through an alarm outlet port that is in fluid communication with a retard chamber venting to atmosphere and a water motor that activates the alarm.
Inventors
- 👤 Robert J Gray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:22
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/14; F16K15/148; F16K15/1402; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7843; Y10T137/7859; Y10T137/7879; Y10T137/7888; Y10T137/789; Y10T137/8158; Y10T137/8326
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
123 words
An alarm check valve comprising, in combination, a conduit, an apertured support member engaged at its periphery to the interior surface of said conduit section, said support member having a curved interior surface facing at least partially in a first direction along the longitudinal axis of the conduit section, and an exterior surface opposite said interior surface, resilient means mated to the interior surface of said support member and movable off of said interior surface to allow a fluid flow through the valve only in said first direction, and outlet means in fluid communication between a portion of said interior surface and said alarm, said outlet means being sealed from fluid in the valve adjacent to the exterior surface of said support member.
Claim 2
Dependent Claim
123 words
An alarm check valve comprising, in combination, a conduit, an apertured support member engaged at its periphery to the interior surface of said conduit section, said support member having a curved interior surface facing at least partially in a first direction along the longitudinal axis of the conduit section, and an exterior surface opposite said interior surface, resilient means mated to the interior surface of said support member and movable off of said interior surface to allow a fluid flow through the valve only in said first direction, and outlet means in fluid communication between a portion of said interior surface and said alarm, said outlet means being sealed from fluid in the valve adjacent to the exterior surface of said support member.
Claim 3
Dependent Claim
23 words
An alarm check valve according to claim 1 in which said support member and said mating resilient means have a generally conical shape.
Claim 4
Dependent Claim
26 words
An alarm check valve according to claim 1 in which said support member has a flanged portion that mounts said support member to said conduit section.
Claim 5
Dependent Claim
26 words
An alarm check valve according to claim 3 in which said outlet means comprises an annular groove formed on the interior surface of said flanged portion.
Claim 6
Dependent Claim
63 words
An alarm check valve according to claim 1 in which said outlet means comprises an annular chamber defined by a portion of the exterior surface of said support member, a portion of the interior surface of said conduit section adjoining said support member portion and a sealing member disposed therebetween, said exterior surface portion having formed therein at least one of said apertures.
Claim 7
Dependent Claim
16 words
An alarm check valve according to claim 5 in which said sealing means is an O-ring.
Claim 8
Dependent Claim
16 words
An alarm check valve according to claim 5 in which said sealing means is a gasket.
Claim 9
Dependent Claim
28 words
An alarm check valve according to claim 1 further comprising port means formed in said conduit section and in fluid communication between said outlet means and the alarm.
Claim 10
Dependent Claim
23 words
An alarm check valve according to claim 1 further comprising means for venting a light fluid flow to atmosphere without sounding the alarm.
Claim 11
Dependent Claim
166 words
An alarm check valve for use in an automatic sprinkler system comprising, in combination, a pipe, a support member having a generally conical shape and engaged at its open end to the interior surface of said pipe, the interior surface of said support member facing at least partially in a first direction along the longitudinal axis of said pipe, said support member having a plurality of apertures formed therein and extending between said interior surface and the exterior surface of said support member, resilient means mated to the interior surface of said support member and movable off of said interior surface to allow a water flow through said pipe and said apertures only in said first direction, outlet means having a generally annular shape and in fluid communication with the interior surface of said support member said outlet means being sealed from the water adjacent to the exterior surface of said support member, and port means in fluid communication between said outlet means and the alarm.
Claim 12
Dependent Claim
166 words
An alarm check valve for use in an automatic sprinkler system comprising, in combination, a pipe, a support member having a generally conical shape and engaged at its open end to the interior surface of said pipe, the interior surface of said support member facing at least partially in a first direction along the longitudinal axis of said pipe, said support member having a plurality of apertures formed therein and extending between said interior surface and the exterior surface of said support member, resilient means mated to the interior surface of said support member and movable off of said interior surface to allow a water flow through said pipe and said apertures only in said first direction, outlet means having a generally annular shape and in fluid communication with the interior surface of said support member said outlet means being sealed from the water adjacent to the exterior surface of said support member, and port means in fluid communication between said outlet means and the alarm.
Claim 13
Dependent Claim
24 words
An alarm valve according to claim 10 in which said outlet means comprises a groove formed on the interior surface of said flanged portion.
Claim 14
Dependent Claim
65 words
An alarm valve according to claim 10 in which said outlet means is a chamber defined by a portion of the exterior surface of said support member that is adjacent said pipe, a portion of the interior surface of said pipe adjoining said support member portion, and a sealing member disposed therebetween, said exterior surface portion having formed therein at least one of said apertures.
Claim 15
Dependent Claim
16 words
An alarm check valve according to claim 12 in which said sealing member is an O-ring.
Claim 16
Dependent Claim
16 words
An alarm check valve according to claim 12 in which said sealing member is a gasket.
Claim 17
Dependent Claim
17 words
An alarm check valve according to claim 10 in which said apertures have a generally circular shape.
Claim 18
Dependent Claim
24 words
An alarm check valve according to claim 10 in which said cage is manufactured from a non-corrosive structural material and said diaphragm is rubber.
References Cited (Backward Citations)
US3448766A
Cited
US3838708A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-15 | 1979-03-17 | 1979-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-15 | 1983-03-17 | 1983-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-15 | 1987-03-17 | 1987-09-16 | $7700.00 | Window Closed / Lapsed |