Patent US3554213A successfully refreshed from Google Patents.
US3554213A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow control valve
Assignee: Individual
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Filing: 1969-04-14
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Granted: 1971-01-12
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Expires: 1989-04-14
Abstract
Abstract A flow control valve is formed of valve body having a longitudinally extending bore containing a main spool axially, slidably positionable within the bore and arranged to be centered along its axis. A pair of slidable subsidiary spools is positioned within an axially extending passageway in the main spool with each of the spools being located on an opposite side of a transverse plane dividing the main spool in half. Each of the subsidiary spools has an axially extending passage which is divided by a partition into two chambers with a sharp-edged orifice in the partition affording communication between the two chambers. Openings through the valve body, the main and subsidiary spools afford fluid flow through the chambers in the subsidiary spools so that the fluid can be passed in either direction through the sharp-edged orifices in the partitions.
Inventors
- 👤 Masao Yoshino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:01
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/02; F16K11/06; F16K11/065; F16K11/07; F15; F15B; F15B13/00; F15B13/02; F15B13/022; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2514; Y10T137/2521; Y10T137/2524; Y10T137/2559; Y10T137/2564; Y10T137/265
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
364 words
A flow-control valve adapted for use as a flow-dividing and flow-combining valve in sychronizing the operation of hydraulic devices, comprising a valve body having a longitudinally extending bore therethrough, a main spool in coaxial relationship with and slideably positionable within said bore, said main spool having an axially extending passageway therethrough, a pair of axially extending subsidiary spools slideably positioned within the passageway in said main spool with each of said subsidiary spools being positioned on the opposite side of a plane transversly bisecting bore in said valve body, means for centrally positioning said main spool in the longitudinal direction of said bore, means for limiting the extent of movement of said subsidiary spools in the longitudinal direction within the passageway in said main spool, said valve body having a first opening therethrough at approximately the center point of its longitudinal direction, said valve body having a pair of second openings therethrough each spaced on an opposite side of the first opening and being positioned between the first opening and the end of said valve body, said main spool having a first opening in said valve body and the passageway through said main spool, said main spool having two pair of second openings therethrough with each pair being positioned in the longitudinal direction on an opposite side of the first opening through the said main spool, each pair of second openings in said main spool being offset from one another in the longitudinal direction so that only one opening of each pair of the second openings in said main spool is in register with the second opening in said valve body for affording flow therethrough, each said subsidiary spool having a passageway therethrough and an opening therein arranged to register with one of the second oPenings in said main spool for affording a flow path from the passageway within said subsidiary spool to the second opening in said valve body, and a partition extending transversly across the passageway in each of said subsidiary spools and dividing the passageway into two separate chambers, said partition having a sharp edged orifice therethrough for affording communication between the two chambers within the passageways in said subsidiary spools.
Claim 2
Dependent Claim
364 words
A flow-control valve adapted for use as a flow-dividing and flow-combining valve in sychronizing the operation of hydraulic devices, comprising a valve body having a longitudinally extending bore therethrough, a main spool in coaxial relationship with and slideably positionable within said bore, said main spool having an axially extending passageway therethrough, a pair of axially extending subsidiary spools slideably positioned within the passageway in said main spool with each of said subsidiary spools being positioned on the opposite side of a plane transversly bisecting bore in said valve body, means for centrally positioning said main spool in the longitudinal direction of said bore, means for limiting the extent of movement of said subsidiary spools in the longitudinal direction within the passageway in said main spool, said valve body having a first opening therethrough at approximately the center point of its longitudinal direction, said valve body having a pair of second openings therethrough each spaced on an opposite side of the first opening and being positioned between the first opening and the end of said valve body, said main spool having a first opening in said valve body and the passageway through said main spool, said main spool having two pair of second openings therethrough with each pair being positioned in the longitudinal direction on an opposite side of the first opening through the said main spool, each pair of second openings in said main spool being offset from one another in the longitudinal direction so that only one opening of each pair of the second openings in said main spool is in register with the second opening in said valve body for affording flow therethrough, each said subsidiary spool having a passageway therethrough and an opening therein arranged to register with one of the second oPenings in said main spool for affording a flow path from the passageway within said subsidiary spool to the second opening in said valve body, and a partition extending transversly across the passageway in each of said subsidiary spools and dividing the passageway into two separate chambers, said partition having a sharp edged orifice therethrough for affording communication between the two chambers within the passageways in said subsidiary spools.
Claim 3
Dependent Claim
53 words
A flow-control valve, as set forth in claim 1, wherein the bore through said valve body being open at its opposite ends, a said means for centrally positioning said main spool includes a cover secured to said valve body at each of its opposite ends for sealing the ends of the bore therethrough.
Claim 4
Dependent Claim
55 words
A flow-control valve, as set forth in claim 2, wherein said means for centrally positioning said main spool in the longitudinal direction of said bore further comprises a spring member located at each end of said bore and being supported against said cover and extending axially into the bore for centering said main spool therein.
Claim 5
Dependent Claim
81 words
A flow-control valve, as set forth in claim 3, wherein said means for limiting the extent of the movement of said subsidiary spools comprising a key member extending across each end of said bore in said valve body adjacent said covers and a stop ring at each end of said bore for securing each said key in position whereby the axial movement of said subsidiary spools are limited at the opposite ends of said bore by said keys and stop rings.
Claim 6
Dependent Claim
28 words
A flow-control valve, as set forth in claim 1, wherein said second openings in said valve body being located in diametrically opposite sides thereof from said first opening.
Claim 7
Dependent Claim
36 words
A flow-control valve, as set forth in claim 1, wherein said partition being located with the passageway in said subsidiary spools between the first opening through said main spool and the openings through said subsidiary spool.
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |