Patent US4676320A successfully refreshed from Google Patents.
US4676320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shut-off device for a sprinkler assembly
Assignee: Fire Sprinkler Specialties Inc
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Filing: 1986-02-28
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Granted: 1987-06-30
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Expires: 2006-02-28
Abstract
Abstract A device for terminating the flow of fluid from an overhead sprinkler equipped with a cut-off valve. A recess within said device accepts the sprinkler head and returns the cut-off valve to its original position. A biased locking means is also provided so that the device can be secured against any unintended resumption of fluid flow.
Inventors
- 👤 Vincent Capasso
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:52
CPC Classifications
A; A62; A62C; A62C37/00; A62C37/08; A62C37/20; Y; Y10; Y10T; Y10T137/00; Y10T137/6851; Y10T137/7043; Y10T137/7062; Y10T137/7065
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
126 words
A device for terminating fluid flow in a temperature-activated sprinkler comprised of a water conduit, flange, baffle plate and cut-off valve, which comprises: (1) a cylindrical hollow body having at one end a recess portion contoured to receive a flange of truncated oviform design said body being comprised of a thermoplastic composition which melts at temperatures corresponding essentially to sprinkler-activating temperatures; (2) a circular seat which circumscribes the interior of said body and abuts said recess portion, said seat being adapted to receive said baffle plate and simultaneously impress into said conduit a cut-off valve for terminating fluid flow; and (3) two apertures oppositely disposed within the sidewalls of said recess portion, both of which are adapted to engage said flange and provide a locking means.
Claim 2
Independent Claim
126 words
A device for terminating fluid flow in a temperature-activated sprinkler comprised of a water conduit, flange, baffle plate and cut-off valve, which comprises: (1) a cylindrical hollow body having at one end a recess portion contoured to receive a flange of truncated oviform design said body being comprised of a thermoplastic composition which melts at temperatures corresponding essentially to sprinkler-activating temperatures; (2) a circular seat which circumscribes the interior of said body and abuts said recess portion, said seat being adapted to receive said baffle plate and simultaneously impress into said conduit a cut-off valve for terminating fluid flow; and (3) two apertures oppositely disposed within the sidewalls of said recess portion, both of which are adapted to engage said flange and provide a locking means.
Claim 3
Dependent Claim
19 words
The device of claim 1 wherein said apertures are horizontally disposed channels which are in juxtaposition with said seat.
Claim 4
Dependent Claim
18 words
The device of claim 2 wherein said apertures are in registry with the truncated portion of said flange.
Claim 5
Dependent Claim
20 words
The device of claim 1 wherein the flange-engaging apertures include a biased segment and engagement is achieved by frictional means.
Claim 6
Dependent Claim
22 words
The device according to claim 1 wherein said thermoplastic composition is a resin having a melting point of from about 100°-250° C.
Claim 7
Dependent Claim
22 words
The device according to claim 5 wherein said resin is a cross-linked copolymer having a melting point of from about 105°-120° C.
Claim 8
Dependent Claim
17 words
The device according to claim 6 wherein said resin is a copolymer derived from styrene and acrylonitrile.
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) | 1990-06-29 | 1990-12-29 | 1991-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-29 | 1994-12-29 | 1995-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-29 | 1998-12-29 | 1999-06-30 | $7700.00 | Window Closed / Lapsed |