US3801233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve assemblies
Assignee: Individual
•
Filing: 1971-12-07
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Granted: 1974-04-02
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Expires: 1991-12-07
Abstract
Abstract There is disclosed in the specification a valve assembly adapted to be interposed between a high pressure precision metering pump and its usual mounting bracket. The valve assembly includes a manually operated valve for interrupting the flow of liquid from a master pump to the metering pump whenever the metering pump is to be replaced. There are also included in a common body with the manually operated valve, automatic valves for isolating one or two high pressure outlets whenever the metering pump is stopped either intentionally or as a result of a malfunction.
Inventors
- 👤 P Simpson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:58
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/44; F16K31/53; F16K31/54; F04; F04B; F04B23/00; F04B23/04; F16K15/00; F16K15/02; F16K15/025; F16K15/026; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7929
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
104 words
A valve assembly for controlling inlet and outlet streams of fibre forming material to and from a metering pump comprIsing a body, a manually operable valve in the inlet stream to the pump, the valve comprising a hollow spool, means for imparting an angular motion to the spool about its axis and including gear teeth formed in the spool and a worm rotatable in engagement with the gear teeth and a cam groove in the spool engageable by a follower for translating the angular motion into a longitudinal motion and a valve automatically operable to interrupt each outlet stream when the pump is stopped.
Claim 2
Dependent Claim
104 words
A valve assembly for controlling inlet and outlet streams of fibre forming material to and from a metering pump comprIsing a body, a manually operable valve in the inlet stream to the pump, the valve comprising a hollow spool, means for imparting an angular motion to the spool about its axis and including gear teeth formed in the spool and a worm rotatable in engagement with the gear teeth and a cam groove in the spool engageable by a follower for translating the angular motion into a longitudinal motion and a valve automatically operable to interrupt each outlet stream when the pump is stopped.
Claim 3
Dependent Claim
74 words
A valve assembly according to claim 1 further characterized in that the body is formed with a passage having a major diameter providing a guideway for the spool, a restricted throat and a seat against which the spool closes, the spool including a sealing surface adapted to engage the seat and a reduced diameter adapted to enter the throat to displace fibre forming material from the throat upon closure of the manually operable valve.
Claim 4
Dependent Claim
46 words
A valve assembly according to claim 1 further characterized in that the automatically operable valve comprises a spool having a major diameter guided in the body, a sealing surface and a reduced diameter adapted to displace fibre forming material upon closure of the automatically operable valve.
Claim 5
Dependent Claim
163 words
A valve assembly for controlling an inlet stream of thermoplastic fibre-forming material moving toward a pump and a separate outlet stream of the material moving away from the pump comprising a body having an outer surface, and a passage including a cylindrical guideway terminating at the outer surface in a narrowed inlet throat and a conical seat interposed between the guideway and the narrowed throat, a valve spool having a major diameter slidable in the guideway, a conical sealing surface adapted to engage the seat and a reduced diameter located and dimensioned substantially to fill the narrowed throat for displacing fibre-forming material from the throat when the conical surface engages the seat, manually operable means for moving the spool between open and closed positions and a check valve also slidable in the body in the outlet stream and automatically operable in response to a drop in pump pressure to prevent return flow of the stream toward the pump when the pump is stopped.
Claim 6
Dependent Claim
163 words
A valve assembly for controlling an inlet stream of thermoplastic fibre-forming material moving toward a pump and a separate outlet stream of the material moving away from the pump comprising a body having an outer surface, and a passage including a cylindrical guideway terminating at the outer surface in a narrowed inlet throat and a conical seat interposed between the guideway and the narrowed throat, a valve spool having a major diameter slidable in the guideway, a conical sealing surface adapted to engage the seat and a reduced diameter located and dimensioned substantially to fill the narrowed throat for displacing fibre-forming material from the throat when the conical surface engages the seat, manually operable means for moving the spool between open and closed positions and a check valve also slidable in the body in the outlet stream and automatically operable in response to a drop in pump pressure to prevent return flow of the stream toward the pump when the pump is stopped.
Claim 7
Dependent Claim
89 words
A valve assembly according to claim 4 further characterized in that the body includes a second passage also including a cylindrical guideway terminating at the outer surface in a narrowed outlet throat and a conical seat interposed between the guideway and the narrowed throat and the check valve also comprises a spool having a major diameter slidable in the guideway, a conical sealing surface adapted to engage the seat and a reduced diameter located and dimensioned substantially to fill the narrowed throat when the conical surface engages the seat.
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) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |