EP0254483A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Solenoid-operated fluid pressure regulator valves
Assignee: Motors Liquidation Co
•
Filing: 1987-07-16
•
Granted: —
•
Expires: 2007-07-16
Abstract
Abstract A fluid pressure regulator valve (l0) comprises a linear solenoid (20) that acts on an asymmetrical spool valve (l8) to selectively communicate one port (l6) with at least one other (l2,l4) to thereby regulate fluid pressure.
Inventors
- 👤 William Conrad Albertson
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 06:54
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/02; F16K31/06; F16K31/0603; F16K31/061; F16K31/0613; F16D; F16D48/00; F16D48/06; F16D48/066; F16H; F16H61/00; F16H61/02; F16H61/0202; F16H61/0251; G; G05; G05D; G05D16/00; G05D16/20; G05D16/2006; G05D16/2013; G05D16/2024; F16D2500/00; F16D2500/10; F16D2500/102; F16D2500/1021; F16D2500/1022; F16D2500/1026; F16D2500/70; F16D2500/704; F16D2500/70402; F16D2500/7041; F16H2061/0258
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
140 words
A fluid valve assembly in which a solenoid (20) has a core (72) that acts on a spool valve (l8) having spaced lands (44,46) of unequal diameter, to effect controlled communication between at least two ports (l2,l4,l6), characterised in that the solenoid (20) has a flux path such as to effect an output force on the core (72) that is proportional to current supplied to the solenoid (20) and independent of core position within a finite displacement range, and that the unequal-diameter lands (44,46) of the spool valve (l8) form therebetween a variable-area flow path between the ports (l2,l4,l6) and also a fluid pressure-unbalanced area acted on by fluid pressure at one (l6) of the ports (l2,l4,l6) so as to impose a controlled fluid force on the spool valve (l8) to ultimately control the communication thereby between the ports (l2,l4,l6).
Claim 2
Dependent Claim
140 words
A fluid valve assembly in which a solenoid (20) has a core (72) that acts on a spool valve (l8) having spaced lands (44,46) of unequal diameter, to effect controlled communication between at least two ports (l2,l4,l6), characterised in that the solenoid (20) has a flux path such as to effect an output force on the core (72) that is proportional to current supplied to the solenoid (20) and independent of core position within a finite displacement range, and that the unequal-diameter lands (44,46) of the spool valve (l8) form therebetween a variable-area flow path between the ports (l2,l4,l6) and also a fluid pressure-unbalanced area acted on by fluid pressure at one (l6) of the ports (l2,l4,l6) so as to impose a controlled fluid force on the spool valve (l8) to ultimately control the communication thereby between the ports (l2,l4,l6).
Claim 3
Dependent Claim
30 words
A fluid valve assembly according to claim l, characterised in that the controlled fluid force is imposed on the spool valve (l8) in a direction opposing the solenoid output force.
Claim 4
Dependent Claim
50 words
A fluid valve assembly according to claim l, characterised in that spring means (80.) acts on the spool valve (l8) in a direction opposing the solenoid output force, and that the controlled fluid force imposed on the spool valve (l8) acts in the same direction as the solenoid output force.
Claim 5
Dependent Claim
109 words
A fluid valve assembly according to any one of claims l to 3, characterised in that the fluid valve is a fluid pressure regulator valve (l0), the ports (l2,l4,l6) of the spool valve (l8) comprise a supply port (l2), an exhaust port (l4) and a control port (l6), and the spool valve (l8) alternatively communicates the supply port (l2) and the exhaust port (l4) with the control port (l6) to establish a regulated pressure in the control port (l6), with the unbalanced area of the spool valve (l8) being acted on by the regulated pressure so as to effect a regulated fluid pressure force on the spool valve (l8).
Claim 6
Dependent Claim
52 words
A fluid valve assembly according to claim 4, characterised in that the regulated pressure acts on the unbalanced area between the lands (44,46) of the spool valve (l8) such that the regulated fluid pressure force on the spool valve (l8) is effective to balance the spool valve (l8) in such pressure regulation.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.