Patent EP0732089A2 successfully refreshed from Google Patents.
Patent US4010674A successfully refreshed from Google Patents.
US4010674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speed responsive systems
Assignee: Associated Engineering Ltd
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Filing: 1975-07-31
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Granted: 1977-03-08
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Expires: 1995-07-31
Abstract
Abstract An actuator device includes a chamber partly bounded by a movable wall and connected to atmosphere through a permanently open orifice and an electromagnetic valve which is maintained in a closed position when de-energized and which controls the connection to said chamber of a volume of gas at other than atmospheric pressure when said valve is open.
Inventors
- 👤 John Noddings
- 👤 Norman Hunt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:34
CPC Classifications
B; B60; B60K; B60K31/00; B60K31/06; B60K31/10; B60K31/102; B60K31/105
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
178 words
An actuator device comprising: a chamber having a relatively fixed wall and a relatively movable wall interconnected by a bellows, a spring within said chamber to urge said bellows to an extended position, a permanently open orifce through which said chamber is connected to atmosphere, a cavity provided in said relatively fixed wall outside of said bellows, an electromagnetic valve housed in said cavity and including a solenoid winding surrounding an armature movable in a direction transverse to the direction of movement of said bellows, an aperture in said cavity which is closed by one end of the armature of said electromagnetic valve when said solenoid winding is de-energised, and which is opened by retraction of said armature from said aperture when said solenoid winding is energised to enable the connection to said chamber of a volume of gas at subatmospheric pressure to cause said bellows to contract against the force of said spring, and resilient means acting on the other end of said armature for urging said armature to close said aperture when said solenoid is de-energised.
Claim 2
Dependent Claim
178 words
An actuator device comprising: a chamber having a relatively fixed wall and a relatively movable wall interconnected by a bellows, a spring within said chamber to urge said bellows to an extended position, a permanently open orifce through which said chamber is connected to atmosphere, a cavity provided in said relatively fixed wall outside of said bellows, an electromagnetic valve housed in said cavity and including a solenoid winding surrounding an armature movable in a direction transverse to the direction of movement of said bellows, an aperture in said cavity which is closed by one end of the armature of said electromagnetic valve when said solenoid winding is de-energised, and which is opened by retraction of said armature from said aperture when said solenoid winding is energised to enable the connection to said chamber of a volume of gas at subatmospheric pressure to cause said bellows to contract against the force of said spring, and resilient means acting on the other end of said armature for urging said armature to close said aperture when said solenoid is de-energised.
Claim 3
Dependent Claim
68 words
An actuator device as claimed in claim 1, wherein said resilient means is a spring member which also serves to locate the electromagnetic valve in position in said cavity and said spring member is generally U-shaped and includes portions which engage with and bias said armature to its closed position and further portions which engage with the wall of said cavity to locate the electromagnetic valve in position.
Claim 4
Dependent Claim
34 words
An actuator device as claimed in claim 2, wherein the wall of said cavity is provided with ribs or the like which co-operate with said spring member to locate said electromagnetic valve in position.
Claim 5
Dependent Claim
32 words
An actuator device as claimed in Claim 3, wherein said spring mmember is crimped between said ribs and a wall of said cavity to hold said valve in position in said cavity.
Claim 6
Dependent Claim
39 words
An actuator device as claimed in Claim 2, wherein a wall of said cavity also includes said permanently open orifice communicating with said chamber and a filter member for filtering atmospheric air passing through said orifice to said chamber.
Claim 7
Dependent Claim
48 words
An actuator device as claimed in Claim 2, wherein said spring member portions which engage with said armature comprise a pair of projections extending inwardly of the U, while said further portions which engage with the wall of the cavity comprise tag members extending outwardly of the U.
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) | 1980-03-07 | 1980-09-06 | 1981-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-07 | 1984-09-06 | 1985-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-07 | 1988-09-06 | 1989-03-08 | $7700.00 | Window Closed / Lapsed |