Patent EP0622928A1 successfully refreshed from Google Patents.
US3913613A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety valve
Assignee: Individual
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Filing: 1974-10-25
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Granted: 1975-10-21
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Expires: 1994-10-25
Abstract
Abstract The invention provides a safety valve designed primarily for hydraulic pit props. According to the invention, the safety valve comprises a valve body with outlet passages and a central bore, the latter accommodating a valve seat constructed in the form of a cup with an extended bottom. Fitted inside the valve seat and coaxially therewith is a throttle having a hole formed centrally therein and arranged to communicate with the valve inlet chamber. A ring with radial holes formed therein and a sealing ring are movably mounted on the external side surface of the valve seat. A union is screwed into the valve body so as to clamp down the valve seat. Said union has a central bore which accommodates a membrane arranged to rest on the faces of said valve seat and throttle. Also accommodated in the union bore are a spring-loaded sealing member seated on the membrane and a charging valve fitted in the top end of the union. The space bounded by the charging valve, the interior walls of the union and the sealing member forms a gas chamber filled with an inert gas under pressure. The gas pressure acts onto the membrane through the sealing member. A central hole and peripheral holes communicating with the valve inlet chamber are provided in the end of the valve body.
Inventors
- 👤 Boris Nikolaevich Kostjunin
- 👤 Alfred Fedorovich Zadvorny
- 👤 Arnold Mikhailovich Ragutsky
- 👤 Vladimir Viktorovic Starichnev
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:55
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/04; F16K17/08; F16K17/085; Y; Y10; Y10S; Y10S137/00; Y10S137/906; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7837; Y10T137/7904; Y10T137/7905
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
340 words
A safety valve comprising: a valve body with an axial cavity, said valve body having an inlet chamber, a central hole and peripheral holes formed at one end thereof; a valve seat, having a face, located in said axial cavity and having a central hole and peripheral holes disposed coaxially with said central and peripheral holes formed in said valve body; a throttle, having a face, located in said valve seat and communicating with said inlet chamber through a central hole provided in said throttle and through the central hole in said valve seat; a ring, having a face, and having radial holes and arranged about a part of the external side surface of said valve seat, said ring being adapted to move along the side surface of the valve seat; outlet passages formed in the side wall of said valve body and arranged to communicate with the radial holes in said ring; a sealing ring arranged about the remaining part of the external side surface of said valve seat and adapted to be moved along the side surface of said valve seat by the pressure of the pressure fluid passing from the inlet chamber through said peripheral holes; a union having an axial cavity and fixedly mounted inside said valve body, and being arranged to fit against the base of said valve seat, said union having outlet passages formed in the side wall thereof communicating with said outlet passages in said valve body; a membrane located inside said union and arranged to be held against the face of said throttle, valve seat and ring, said membrane being adapted to be moved axially inside the union by the pressure of a working fluid; a sealing member located inside said union and seated on said membrane; a charging valve provided with a seal and accommodated inside said union at the end thereof opposite to said sealing member; a gas chamber formed by the union interior bounded by said sealing member and charging valve, and said gaS chamber containing gas under pressure.
Claim 2
Dependent Claim
340 words
A safety valve comprising: a valve body with an axial cavity, said valve body having an inlet chamber, a central hole and peripheral holes formed at one end thereof; a valve seat, having a face, located in said axial cavity and having a central hole and peripheral holes disposed coaxially with said central and peripheral holes formed in said valve body; a throttle, having a face, located in said valve seat and communicating with said inlet chamber through a central hole provided in said throttle and through the central hole in said valve seat; a ring, having a face, and having radial holes and arranged about a part of the external side surface of said valve seat, said ring being adapted to move along the side surface of the valve seat; outlet passages formed in the side wall of said valve body and arranged to communicate with the radial holes in said ring; a sealing ring arranged about the remaining part of the external side surface of said valve seat and adapted to be moved along the side surface of said valve seat by the pressure of the pressure fluid passing from the inlet chamber through said peripheral holes; a union having an axial cavity and fixedly mounted inside said valve body, and being arranged to fit against the base of said valve seat, said union having outlet passages formed in the side wall thereof communicating with said outlet passages in said valve body; a membrane located inside said union and arranged to be held against the face of said throttle, valve seat and ring, said membrane being adapted to be moved axially inside the union by the pressure of a working fluid; a sealing member located inside said union and seated on said membrane; a charging valve provided with a seal and accommodated inside said union at the end thereof opposite to said sealing member; a gas chamber formed by the union interior bounded by said sealing member and charging valve, and said gaS chamber containing gas under pressure.
Claim 3
Dependent Claim
430 words
A safety valve comprising: a valve body with an axial cavity, said valve body having an inlet chamber, a central hole and peripheral holes formed at one end thereof; a valve seat, having a face, located in said axial cavity and having a central hole and peripheral holes; a throttle, having a face, located in said valve seat and communicating with said inlet chamber through a central hole provided in said throttle and through the hole in said valve seat; ring, having a face, and having radial holes and arranged about a part of the external side surface of said valve seat, said ring being adapted to move along the side surface of said valve seat; outlet passages formed in the side wall of said valve body and arranged to communicate with the radial holes in said ring; a sealing ring arranged about the remaining part of the external side surface of said valve seat and adapted to be moved along the side surface of said valve seat by the pressure of the pressure fluid passing from the inlet chamber through said peripheral holes; a union having an axial cavity and fixedly mounted inside said valve body, being arranged to fit against the base of said valve seat, said union having outlet passages formed in the side wall thereof communicating with said outlet passages in said valve body; a membrance located inside said union and arranged to be held against the faces of said throttle, valve seat and ring, said membrane being adapted to be moved axially inside the union by the pressure of a working fluid; a sealing member in the form of a hollow rubber cylinder located inside said union, the rubber cylinder having a hole in one of the ends and a projection on the internal side of the opposite end adjacent to the membrance; a charging valve accommodated in the hole in said rubber cylinder and constructed in the form of a shouldered cylinder, the diameter of the charging valve shoulder exceeding the diameter of said hole in the rubber cylinder, said shoulder being located inside the rubber cylinder and adapted to close said hole; a spring located inside the rubber cylinder, one end of said spring being fitted over said projection and the other end resting against said charging valve, which spring applies initial pressure to hold the shoulder of the charging valve against the internal face of the rubber cylinder; a gas chamber formed by the interior of the rubber cylinder bounded by the charging valve, and said gas chamber containing gas under pressure.
Claim 4
Dependent Claim
430 words
A safety valve comprising: a valve body with an axial cavity, said valve body having an inlet chamber, a central hole and peripheral holes formed at one end thereof; a valve seat, having a face, located in said axial cavity and having a central hole and peripheral holes; a throttle, having a face, located in said valve seat and communicating with said inlet chamber through a central hole provided in said throttle and through the hole in said valve seat; ring, having a face, and having radial holes and arranged about a part of the external side surface of said valve seat, said ring being adapted to move along the side surface of said valve seat; outlet passages formed in the side wall of said valve body and arranged to communicate with the radial holes in said ring; a sealing ring arranged about the remaining part of the external side surface of said valve seat and adapted to be moved along the side surface of said valve seat by the pressure of the pressure fluid passing from the inlet chamber through said peripheral holes; a union having an axial cavity and fixedly mounted inside said valve body, being arranged to fit against the base of said valve seat, said union having outlet passages formed in the side wall thereof communicating with said outlet passages in said valve body; a membrance located inside said union and arranged to be held against the faces of said throttle, valve seat and ring, said membrane being adapted to be moved axially inside the union by the pressure of a working fluid; a sealing member in the form of a hollow rubber cylinder located inside said union, the rubber cylinder having a hole in one of the ends and a projection on the internal side of the opposite end adjacent to the membrance; a charging valve accommodated in the hole in said rubber cylinder and constructed in the form of a shouldered cylinder, the diameter of the charging valve shoulder exceeding the diameter of said hole in the rubber cylinder, said shoulder being located inside the rubber cylinder and adapted to close said hole; a spring located inside the rubber cylinder, one end of said spring being fitted over said projection and the other end resting against said charging valve, which spring applies initial pressure to hold the shoulder of the charging valve against the internal face of the rubber cylinder; a gas chamber formed by the interior of the rubber cylinder bounded by the charging valve, and said gas chamber containing gas under pressure.
Claim 5
Dependent Claim
32 words
A safety valve as claimed in claim 1, in which the side of said ring facing toward said membrane has a larger area than the ring side facing toward said inlet chamber.
Claim 6
Dependent Claim
32 words
A safety valve as claimed in claim 2, in which the side of said ring facing toward said membrane has a larger area than the ring side facing toward said inlet chamber.
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) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |