US3770018A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve assembly with linear motors
Assignee: Individual
•
Filing: 1971-09-13
•
Granted: 1973-11-06
•
Expires: 1991-09-13
Abstract
Abstract A valve having liquid inlet and outlet ports; liquid flowing through the outlet port being controlled by a spool valve element moved by linear motors; one of the enlarged portions of the spool valve element being shaped as a cone to control liquid flow; an electrical current controller for voltage or frequency operatively connected to a stator of the respective linear motors; and an operation rod provided in the linear motor, the diameter of the operation rod being varied to vary the speed of the spool through variation of magnet forces.
Inventors
- 👤 N Sugimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:22
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/02; F16K11/06; F16K11/065; F16K11/07; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86831
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
163 words
A valve assembly comprising in combination: a valve casing having an axial bore, fluid inlet and outlet ports spaced along said axial bore and communicating therewith; linear motor means at least at one end of said valve casing; a valve spool reciprocably disposed in said axial bore and including a control land reciprocable relative to said ports for controlling fluid-flow therethrough, said linear motor means comprising an electro-magnetic assembly including a stator and armature, said stator including means for producing a magnetic field shiftable in a linear direction when an electric current is applied thereto, said armature comprising an axial rod operatively connected to said valve spool and subject to shifting axially when subject to said stator whereby the valve spool land is shifted relative to said outlet port, said axial rod including a transverse cross section differing from that of adjacent portions whereby the magnetic reaction to the magnetic field can be altered in relation to response parameters of the valve spool.
Claim 2
Dependent Claim
163 words
A valve assembly comprising in combination: a valve casing having an axial bore, fluid inlet and outlet ports spaced along said axial bore and communicating therewith; linear motor means at least at one end of said valve casing; a valve spool reciprocably disposed in said axial bore and including a control land reciprocable relative to said ports for controlling fluid-flow therethrough, said linear motor means comprising an electro-magnetic assembly including a stator and armature, said stator including means for producing a magnetic field shiftable in a linear direction when an electric current is applied thereto, said armature comprising an axial rod operatively connected to said valve spool and subject to shifting axially when subject to said stator whereby the valve spool land is shifted relative to said outlet port, said axial rod including a transverse cross section differing from that of adjacent portions whereby the magnetic reaction to the magnetic field can be altered in relation to response parameters of the valve spool.
Claim 3
Dependent Claim
26 words
The valve assembly as set forth in claim 1 in which said linear motor means is sealed from the valve element and inlet and outlet ports.
Claim 4
Dependent Claim
29 words
The valve assembly as set forth in claim 1 including spring means acting on said valve spool and normally centering the same to prevent fluid-flow through said outlet port.
Claim 5
Dependent Claim
48 words
A valve assembly as set forth in claim 1 in which said valve spool includes a cylindrical land having a frusto-conical portion at one end thereof whereby the orienting of the frusto-conical portion relative to said outlet port controls the quantity of fluid flow through the outlet port.
Claim 6
Dependent Claim
34 words
A valve assembly as set forth in claim 1 including current control means operatively connected to said linear motor means for controlling the generated magnetic field and the linear speed of the valve spool.
Claim 7
Dependent Claim
23 words
The valve assembly as set forth in claim 1 in which linear motor means are provided at opposite ends of said valve casing.
Claim 8
Dependent Claim
48 words
The valve assembly as set forth in claim 6 in which the casing includes a pair of outlet ports flanking the inlet port, said valve spool including spaced, cylindrical lands controlling fluid flow through the spaced ports and balancing the effect of fluid pressure of the valve spool.
Claim 9
Dependent Claim
153 words
A valve assembly comprising in combination: a valve casing having an axial bore, fluid inlet and outlet ports spaced along said axial bore and communicating therewith; linear motor means at least at one end of said valve casing; a valve spool reciprocably disposed in said axial bore and including a control land reciprocable relative to said ports for controlling fluid-flow therethrough, linear motor means comprising an electro-magnetic assembly including a stator and armature, said stator including means for producing a magnetic field shiftable in a linear direction when an electric current is applied thereto, said armature comprising an axial rod operatively connected to said valve spoon and subject to shifting axially when subject to said stator whereby the valve spool land is shifted relative to said port, port said axial rod including magnetic-impermeable layer for varying the reaction of the rod to a magnetic field to alter response characteristics of the valve spool.
Claim 10
Dependent Claim
153 words
A valve assembly comprising in combination: a valve casing having an axial bore, fluid inlet and outlet ports spaced along said axial bore and communicating therewith; linear motor means at least at one end of said valve casing; a valve spool reciprocably disposed in said axial bore and including a control land reciprocable relative to said ports for controlling fluid-flow therethrough, linear motor means comprising an electro-magnetic assembly including a stator and armature, said stator including means for producing a magnetic field shiftable in a linear direction when an electric current is applied thereto, said armature comprising an axial rod operatively connected to said valve spoon and subject to shifting axially when subject to said stator whereby the valve spool land is shifted relative to said port, port said axial rod including magnetic-impermeable layer for varying the reaction of the rod to a magnetic field to alter response characteristics of the valve spool.
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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) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |