Patent US3860073A successfully refreshed from Google Patents.
US3860073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire extinguisher discharge valve
Assignee: NI West Inc
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Filing: 1974-01-25
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Granted: 1975-01-14
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Expires: 1994-01-25
Abstract
Abstract A discharge valve for each of a plurality of manifold connected containers for fire extinguishing fluid, the discharge valve including a main valve pressure seated by fluid in the container to which it is attached and openable by pressure in the valve outlet from the manifold. This action is achieved by use of a double faced two diameter piston integral with the main valve member. A combination filling and pilot valve is included so that each container may be separately filled while connected to the manifold. The pilot valve may be actuated to discharge one container to provide manifold pressure for discharge of the remaining cylinders.
Inventors
- 👤 Charles F Willms
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:53
CPC Classifications
A; A62; A62C; A62C13/00; A62C13/003; F; F16; F16K; F16K31/00; F16K31/12; F16K31/36; F16K31/38; F16K31/383
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
323 words
A fire extinguisher discharge valve adapted to be attached to the outlet of a container for fire extinguisher fluid, said discharge valve comprising a housing having an inlet and an outlet with a main fluid passage therebetween, a main valve seat defining inlet and outlet portions of said main fluid passage and facing said outlet portion, a main valve member adapted to engage said main valve seat from the outlet portion, a front and rear faced two diameter piston member integral with said main valve member, said front face having outer and central portions, said main valve member forming said central portion, two diameter cylinder means in said housing on the outlet side of said main valve seat, said two diameter piston sealingly and slideably mounted in said two diameter cylinder for movement of said main valve member against and away from its seat, the area of the rear face of said piston member greater than the Area of said main valve seat, the area of said front face outer portion of greater area than said area of said rear face, pressure equalizing fluid passage means leading from the front face of said piston member to the rear face thereof so that said piston member is normally urged into main valve closing position by the pressure of fluid in said inlet passage, fluid passage valve seat means about said pressure equalizing fluid passage means directed towards said inlet passage, and a normally open valve member for said fluid passage valve seat, said main valve member adapted to be held against its seat by fluid pressure on the inlet applied through said pressure equalizing fluid passage against said rear face of said piston, said main valve member adapted to be opened by fluid pressure introduced into said outlet portion of said main fluid passage and acting against said front face of said piston member outwardly of said main valve member for the unseating thereof.
Claim 2
Dependent Claim
323 words
A fire extinguisher discharge valve adapted to be attached to the outlet of a container for fire extinguisher fluid, said discharge valve comprising a housing having an inlet and an outlet with a main fluid passage therebetween, a main valve seat defining inlet and outlet portions of said main fluid passage and facing said outlet portion, a main valve member adapted to engage said main valve seat from the outlet portion, a front and rear faced two diameter piston member integral with said main valve member, said front face having outer and central portions, said main valve member forming said central portion, two diameter cylinder means in said housing on the outlet side of said main valve seat, said two diameter piston sealingly and slideably mounted in said two diameter cylinder for movement of said main valve member against and away from its seat, the area of the rear face of said piston member greater than the Area of said main valve seat, the area of said front face outer portion of greater area than said area of said rear face, pressure equalizing fluid passage means leading from the front face of said piston member to the rear face thereof so that said piston member is normally urged into main valve closing position by the pressure of fluid in said inlet passage, fluid passage valve seat means about said pressure equalizing fluid passage means directed towards said inlet passage, and a normally open valve member for said fluid passage valve seat, said main valve member adapted to be held against its seat by fluid pressure on the inlet applied through said pressure equalizing fluid passage against said rear face of said piston, said main valve member adapted to be opened by fluid pressure introduced into said outlet portion of said main fluid passage and acting against said front face of said piston member outwardly of said main valve member for the unseating thereof.
Claim 3
Dependent Claim
26 words
A fire extinguishing discharge valve according to claim 1 in which said piston valve member is in alignment with the inlet portion of said valve housing.
Claim 4
Dependent Claim
28 words
A fire extinguishing discharge valve according to claim 1 in which outlet fitting connection means is positioned at right angles to said inlet portion of said valve housing.
Claim 5
Dependent Claim
41 words
A fire extinguishing discharge valve according to claim 1 in which said normally open valve member is a ball valve member adapted to be closed by differential pressure thereacross in which the greater pressure is outwardly of the ball valve member.
Claim 6
Dependent Claim
23 words
A fire extinguishing discharge valve according to claim 1 in which said two diameter cylinder is formed in two sections threadedly engaged together.
Claim 7
Dependent Claim
54 words
A fire extinguishing discharge valve according to claim 1 in which said piston valve member is in alignment with the inlet portion of said valve housing, outlet fitting connection means is positioned at right angles to aid inlet portion of said valve housing, and said normally open valve member is a ball valve member.
Claim 8
Dependent Claim
66 words
A fire extinguishing discharge valve according to claim 1 in which said piston valve member is in alignment with the inlet portion of said valve housing, outlet fitting connection means is positioned at right angles to said inlet portion of said valve housing, said normally open valve member is a ball valve member, and said two diameter cylinder is formed in two sections threadedly engaged together.
Claim 9
Dependent Claim
81 words
A fire extinguishing discharge valve according to claim 1 in which is included means defining a combination filling fluid and pilot valve discharge fluid passage at the end of said cylinder, a valve seat about said last mentioned fluid passage, and a normally closed combination filling fluid and pilot discharge valve member within said cylinder engaging said last mentioned valve seat and adapted to be opened to admit fire extinguishing fluid to be charged through aid discharge valve into a container.
Claim 10
Dependent Claim
23 words
A fire extinguishing discharge valve according to claim 8 in which said combination filling and pilot valve is spring urged against its seat.
Claim 11
Dependent Claim
145 words
A fire extinguishing discharge valve according to claim 1 in which said piston valve member is in alignment with the inlet portion of said valve housing, outlet fitting connection means is positioned at right angles to said inlet portion of said valve housing, said normally open valve member is a ball valve member, said two diameter cylinder is formed in two sections threadedly engaged together, means defining a combination filling fluid and pilot valve discharge fluid passage at the end of said cylinder, a valve seat about said last mentioned fluid passage, a normally closed combination filling fluid and pilot discharge valve member within said cylinder engaging said last mentioned valve seat and adapted to be opened to admit fire extinguishing fluid to be charged through said discharge valve into a container, and said combination filling and pilot valve is spring urged against its seat.
References Cited (Backward Citations)
US3610571A
Cited
US3674237A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |