US3789880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Porous metal flow control spool
Assignee: CHEM VALLEY MACHINES Inc
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Filing: 1972-01-04
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Granted: 1974-02-05
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Expires: 1992-01-04
Abstract
Abstract A flow control spool having first, second, and third separate cylindrical spool parts, and a pair of porous metal discs arranged in the second spool part for controlling the flow in a flow path defined by the spool. The spool parts are hollow with an end of the first and third spool parts being enclosed, and each spool part is provided with ports which cooperate with passages in a valve block in which the spool is arranged for defining a flow path system.
Inventors
- 👤 D Armstrong
- 👤 G Armstrong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:39
CPC Classifications
F; F16; F16K; F16K47/00; F16K47/08; F16K47/14; F16K11/00; F16K11/02; F16K11/06; F16K11/065; F16K11/07; F16K11/0716; F16K3/00; F16K3/22; F16K3/24; F16K3/26; F16K3/30; F16K3/32; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86718; Y10T137/86734; Y10T137/86759; Y10T137/86791; Y10T137/86799
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
129 words
A flow control spool, comprising, in combination, first, second and third separate spool parts defining a flow path, and porous means arranged in the flow path in the second spool part for controlling the amount of flow therein, said second spool part being a hollow cylinder constructed in two pieces and provided with spaced, opened ends and at least one port arranged between the ends, and said porous means being at least one porous metal disc arranged within said hollow cylinder, said first and third spool parts being also hollow cylinders, each provided with an open end arranged adjacent a respective end of said second spool part, an enclosed end, and at least one port arranged between the ends, said ports and hollow cylinders defining a flow path system.
Claim 2
Dependent Claim
129 words
A flow control spool, comprising, in combination, first, second and third separate spool parts defining a flow path, and porous means arranged in the flow path in the second spool part for controlling the amount of flow therein, said second spool part being a hollow cylinder constructed in two pieces and provided with spaced, opened ends and at least one port arranged between the ends, and said porous means being at least one porous metal disc arranged within said hollow cylinder, said first and third spool parts being also hollow cylinders, each provided with an open end arranged adjacent a respective end of said second spool part, an enclosed end, and at least one port arranged between the ends, said ports and hollow cylinders defining a flow path system.
Claim 3
Dependent Claim
25 words
A structure as defined in claim 1, wherein there are a pair of porous metal discs, one arranged between said port and a respective end.
Claim 4
Dependent Claim
35 words
A structure as defined in claim 1, wherein each said piece of said second spool part, and each of said first and third spool parts is provided with a groove for receiving a sealing element.
Claim 5
Dependent Claim
138 words
A flow control spool, comprising at least one spool part defining a flow path, and porous means arranged in the flow path for controlling the amount of flow therein, said spool part being a hollow cylinder provided with spaced, opened ends and at least one port arranged between the ends, and said porous means being at least one porous metal disc arranged within said hollow cylinder, the spool further comprising, in combination, first, second, and third separate spool parts, and said porous means being arranged in said second spool part, said first and third spool parts being also hollow cylinders, each provided with an open end arranged adjacent a respective end of said second spool part, an enclosed end, and at least one port arranged between the ends, said ports and hollow cylinders defining a flow path system.
Claim 6
Dependent Claim
138 words
A flow control spool, comprising at least one spool part defining a flow path, and porous means arranged in the flow path for controlling the amount of flow therein, said spool part being a hollow cylinder provided with spaced, opened ends and at least one port arranged between the ends, and said porous means being at least one porous metal disc arranged within said hollow cylinder, the spool further comprising, in combination, first, second, and third separate spool parts, and said porous means being arranged in said second spool part, said first and third spool parts being also hollow cylinders, each provided with an open end arranged adjacent a respective end of said second spool part, an enclosed end, and at least one port arranged between the ends, said ports and hollow cylinders defining a flow path system.
Claim 7
Dependent Claim
95 words
In a combination of valve block provided with a bore and flow passages communicating therewith, and a flow control spool arranged in the bore and defining a flow path system with the flow passages, the improvement wherein the flow control spool has porous means arranged in the flow path for controlling the amount of flow therein, and the flow control spool in the operative mode thereof is divided into a plurality of unattached and abutting spool parts with the porous means being at least one porous metal disc arranged in one of the spool parts.
Claim 8
Dependent Claim
95 words
In a combination of valve block provided with a bore and flow passages communicating therewith, and a flow control spool arranged in the bore and defining a flow path system with the flow passages, the improvement wherein the flow control spool has porous means arranged in the flow path for controlling the amount of flow therein, and the flow control spool in the operative mode thereof is divided into a plurality of unattached and abutting spool parts with the porous means being at least one porous metal disc arranged in one of the spool parts.
Claim 9
Dependent Claim
54 words
A structure as defined in claim 5, wherein the flow control spool in the operative mode thereof is divided into first, second, and third unattached and abutting spool parts, and the porous metal disc is arranged in the second spool part, the second spool part being arranged between the first and third spool parts.
Claim 10
Dependent Claim
30 words
A structure as defined in claim 6, wherein the second spool part is a hollow cylinder provided with spaced, opened ends and at least one part arranged between the ends.
Claim 11
Dependent Claim
17 words
A structure as defined in claim 7, wherein said second spool part is constructed in two pieces.
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) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |