US3794290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure fluid control valve
Assignee: Gebrueder Boehler and Co AG
•
Filing: 1972-08-02
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Granted: 1974-02-26
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Expires: 1992-08-02
Abstract
Abstract The valve serves to control the supply of pressure fluid from a first tubular member constituting a pressure fluid outlet to a second tubular member which forms part of a pressure fluid consumer which is movable relative to said first tubular member between a first position more remote from said first tubular member and a second position nearer to said first tubular member. The valve comprises an inner sleeve secured to said second tubular member and an outer sleeve surrounding said inner sleeve and secured to said first tubular member. The inner and outer sleeves define together a flow path adapted to establish a communication between said first and second tubular members. A valve seat is secured to said outer sleeve and forms a frustoconical constriction in said flow path. A valve cone is disposed in said flow path on the side of said valve seat which is opposite to said inner sleeve and axially movable relative to said valve seat and adapted to sealingly engage the same. Said valve cone has an outside diameter which exceeds the inside diameter of said constriction. Spacing means are disposed between said valve cone and said inner sleeve and arranged to hold said valve cone clear of said valve seat unless said inner and outer sleeves are in a relative position corresponding to said second position of said second tubular member.
Inventors
- 👤 J Huszar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:03
CPC Classifications
E; E21; E21B; E21B4/00; E21B4/06; E21B4/14
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
232 words
A valve for controlling the supply of pressure fluid from a first tubular member constituting a pressure fluid outlet to a second tubular member forming part of a pressure fluid consumer and movable relative to said first tubular member between a first position more remote from said first tubular member and a second position nearer to said first tubular member, which valve comprises an inner sleeve coaxially secured to said second tubular member, an outer sleeve surrounding said inner sleeve and coaxially secured to said first tubular member, said inner and outer sleeves defining together a flow path to establish a communication between said first and second tubular members, a valve seat secured to said outer sleeve and forming a frustoconical constriction in said flow path, a valve cone disposed in said flow path on the side of said valve seat which is opposite to said inner sleeve and axially movable relative to said valve seat and adapted to sealingly engage the same, said valve cone having an outside diameter which exceeds the inside diameter of said constriction and spacing means disposed between said valve cone and said inner sleeve and arranged to hold said valve cone clear of said valve seat unless said inner and outer sleeves are in a relative position corresponding to said second position of said second tubular member in which said valve cone sealingly engages said seat.
Claim 2
Dependent Claim
232 words
A valve for controlling the supply of pressure fluid from a first tubular member constituting a pressure fluid outlet to a second tubular member forming part of a pressure fluid consumer and movable relative to said first tubular member between a first position more remote from said first tubular member and a second position nearer to said first tubular member, which valve comprises an inner sleeve coaxially secured to said second tubular member, an outer sleeve surrounding said inner sleeve and coaxially secured to said first tubular member, said inner and outer sleeves defining together a flow path to establish a communication between said first and second tubular members, a valve seat secured to said outer sleeve and forming a frustoconical constriction in said flow path, a valve cone disposed in said flow path on the side of said valve seat which is opposite to said inner sleeve and axially movable relative to said valve seat and adapted to sealingly engage the same, said valve cone having an outside diameter which exceeds the inside diameter of said constriction and spacing means disposed between said valve cone and said inner sleeve and arranged to hold said valve cone clear of said valve seat unless said inner and outer sleeves are in a relative position corresponding to said second position of said second tubular member in which said valve cone sealingly engages said seat.
Claim 3
Dependent Claim
81 words
A valve as set forth in claim 1, in which said outer sleeve is secured to a first tubular member consisting of a fitting and said inner sleeve is secured to a second tubular member forming part of a reciprocating motor of a percussion drill and said inner and outer sleeves are arranged to assume said first position when said motor is operating under a load and to assume said second position when said motor is operating substantially under no load.
Claim 4
Dependent Claim
29 words
A valve as set forth in claim 1, which comprises a duct, which by-passes said constriction and which is open when said valve cone sealingly engages said valve seat.
Claim 5
Dependent Claim
23 words
A valve as set forth in claim 3, in which said duct is formed by a central axial bore in said valve cone.
Claim 6
Dependent Claim
35 words
A valve as set forth in claim 1, in which said spacing means comprise guide webs which are secured to said valve cone and extend in and are in slidable engagement with said outer sleeve.
Claim 7
Dependent Claim
129 words
A valve as set forth in claim 5, which comprises a collar mounted on the outside of said outer sleeve and a retaining cap having an internal shoulder surrounding said outer sleeve and adapted to be secured to said second tubular member in such a position that said collar is disposed between said internal shoulder and said second tubular member and the axial distance between said internal shoulder and said second tubular member exceeds the axial length of said collar, said collar having an outside diameter which exceeds the inside diameter of said shoulder and of said second tubuLar member and is adapted to engage said shoulder to define said first position and to engage said second tubular member to define said second position of said second tubular member.
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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) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |