Patent US3698434A successfully refreshed from Google Patents.
US3698434A
Expired / Lapsed
US
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Hydraulic directional control valve
Assignee: Case LLC
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Filing: 1971-04-01
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Granted: 1972-10-17
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Expires: 1991-04-01
Abstract
Abstract A directional flow control valve for controlling fluid flow between a source of fluid energy and a hydraulic motor having a valve housing, intake ports, motor ports, and exhaust ports, control means movable within said valve housing so as to selectively interconnect the ports of said valve housing, and flow responsive means within one of said ports, engageable with the control means for holding same in the selected position until flow ceases.
Inventors
- 👤 Vaughn A Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:13
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/02; F16K11/06; F16K11/065; F16K11/07; F16K11/0704; F15; F15B; F15B13/00; F15B13/02; F15B13/04; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86485
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
147 words
A directional flow control valve comprising: a. a valve housing having an elongated bore therein, two motor ports, two exhaust ports, and an intake port, each of said ports being communicatable with said elongated bore, b. a poppet valve means within each of said motor ports and said intake port for controlling flow from said ports to said elongated bore, c. a spool means reciprocable within said bore and having cam means thereon, d. plunger means disposed in between said poppet valve means and said spool means for reciprocation by said cam means to selectively open or close said poppet valve means upon reciprocation of said spool means, e. flow sensitive means disposed in at least one of said ports and operative upon at least one of said plungers so as to impose force upon said spool to hold same in a reciprocated position until flow ceases.
Claim 2
Dependent Claim
147 words
A directional flow control valve comprising: a. a valve housing having an elongated bore therein, two motor ports, two exhaust ports, and an intake port, each of said ports being communicatable with said elongated bore, b. a poppet valve means within each of said motor ports and said intake port for controlling flow from said ports to said elongated bore, c. a spool means reciprocable within said bore and having cam means thereon, d. plunger means disposed in between said poppet valve means and said spool means for reciprocation by said cam means to selectively open or close said poppet valve means upon reciprocation of said spool means, e. flow sensitive means disposed in at least one of said ports and operative upon at least one of said plungers so as to impose force upon said spool to hold same in a reciprocated position until flow ceases.
Claim 3
Dependent Claim
36 words
An apparatus as defined in claim 1 in which: a. centering means are operatively connected to said spool so as to urge same in a position such that none of the poppet valve means are open.
Claim 4
Dependent Claim
40 words
An apparatus as defined in claim 1 in which said flow responsive means comprises: a. detent means actuated by flow within said intake porting so as to act upon said spool to overcome its spring bias to said neutral position.
Claim 5
Dependent Claim
67 words
An apparatus as defined in claim 1 in which said flow responsive means comprises: a. resilient biasing means operable against said plunger, and b. a seat within said intake porting which is movable by fluid flow so as to bias said biasing means therefor against said plunger to hold the spool in said second position until flow ceases and said spring seat returns to its original position.
Claim 6
Dependent Claim
91 words
In a directional flow control valve having a housing intake and motor ports, one of which is controlled by a poppet type valve, and a moveable member therein for selectively opening said intake and motor ports, an improved detent mechanism associated with said poppet controlled valve port comprising: a. plunger means interconnecting said moveable member and said poppet valve controlled port for actuating said valve therein, b. flow sensing means within said housing operatively connected with said interconnecting means for maintaining said moveable member in an actuating position until flow ceases.
Claim 7
Dependent Claim
91 words
In a directional flow control valve having a housing intake and motor ports, one of which is controlled by a poppet type valve, and a moveable member therein for selectively opening said intake and motor ports, an improved detent mechanism associated with said poppet controlled valve port comprising: a. plunger means interconnecting said moveable member and said poppet valve controlled port for actuating said valve therein, b. flow sensing means within said housing operatively connected with said interconnecting means for maintaining said moveable member in an actuating position until flow ceases.
Claim 8
Dependent Claim
60 words
An apparatus as recited in claim 5 in which said flow sensing means comprises: a. a valve member in the path of fluid flow for shifting in response to flow, b. elastic means interposed between said valve member and said plunger means for imposing a force upon said moveable member to hold same in an open position until flow ceases.
Claim 9
Dependent Claim
93 words
In a directional flow control valve having a housing intake and motor ports, one of which is controlled by a poppet type valve, and a moveable member therein for selectively opening said intake and motor ports, an improved detent mechanism associated with said poppet controlled valve port comprising: a. cam operated plunger means interconnecting said moveable member and said poppet valve controlled port for actuaTing said valve therein, b. flow sensing means within said housing operatively connected with said interconnecting means for maintaining said moveable member in an actuating position until flow ceases.
Claim 10
Dependent Claim
93 words
In a directional flow control valve having a housing intake and motor ports, one of which is controlled by a poppet type valve, and a moveable member therein for selectively opening said intake and motor ports, an improved detent mechanism associated with said poppet controlled valve port comprising: a. cam operated plunger means interconnecting said moveable member and said poppet valve controlled port for actuaTing said valve therein, b. flow sensing means within said housing operatively connected with said interconnecting means for maintaining said moveable member in an actuating position until flow ceases.
Claim 11
Dependent Claim
60 words
An apparatus as recited in claim 7 in which said flow sensing means comprises: a. a valve member in the path of fluid flow for shifting in response to flow, b. elastic means interposed between said valve member and said plunger means for imposing a force upon said moveable member to hold same in an open position until flow ceases.
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) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |