Patent US3872786A successfully refreshed from Google Patents.
US3872786A
Expired / Lapsed
US
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Fluid actuator device
Assignee: Individual
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Filing: 1974-02-07
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Granted: 1975-03-25
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Expires: 1994-02-07
Abstract
Abstract A fluid actuator device for use in combination with apparatus to control the supply of a fluid such as air delivered thereto during its course of operation, for ejecting stamped parts and/or slugs, molded parts, for directing material through a stamping die and various other operations where a controlled air stream or blast is required. The fluid actuator device is mechanical in operation, hence eliminating the need of an electrical source coupled to it, as in the case of, for example, microswitches.
Inventors
- 👤 Morris J Holton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:49
CPC Classifications
B; B21; B21D; B21D45/00; B29; B29C; B29C45/00; B29C45/17; B29C45/40; B29C45/43; B30; B30B; B30B15/00; B30B15/32; Y; Y10; Y10T; Y10T83/00; Y10T83/202; Y10T83/2066
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
214 words
In combination with apparatus having a stationary bed and a movable bed, a fluid actuator device for controlling the supply of a fluid to said apparatus to eject a workpiece therefrom during the course of operation thereof comprising, in combination: a plunger affixed to one of said stationary and movable beds, a fluid switch assembly affixed to the other one of said stationary and movable beds having a house, a bore extending through said housing for receiving therethrough said plunger as said movable bed is moved relative to said stationary bed, a lever trigger assembly within said housing having a lever arm pivotally affixed with respect to said housing and a trigger lever pivotally affixed to said lever arm in a position and fashion such as to pivotally operate said lever arm when said plunger is extended through said bore in one direction and to permit said plunger to pass through said bore in the other direction without said lever arm being pivotally operated, and a piston valve for controlling fluid flow through said fluid switch assembly to said apparatus, said piston valve normally being biased closed to block fluid flow therethrough and being operated by said lever arm when the latter is pivotally operated by said trigger lever to permit fluid flow therethrough.
Claim 2
Dependent Claim
214 words
In combination with apparatus having a stationary bed and a movable bed, a fluid actuator device for controlling the supply of a fluid to said apparatus to eject a workpiece therefrom during the course of operation thereof comprising, in combination: a plunger affixed to one of said stationary and movable beds, a fluid switch assembly affixed to the other one of said stationary and movable beds having a house, a bore extending through said housing for receiving therethrough said plunger as said movable bed is moved relative to said stationary bed, a lever trigger assembly within said housing having a lever arm pivotally affixed with respect to said housing and a trigger lever pivotally affixed to said lever arm in a position and fashion such as to pivotally operate said lever arm when said plunger is extended through said bore in one direction and to permit said plunger to pass through said bore in the other direction without said lever arm being pivotally operated, and a piston valve for controlling fluid flow through said fluid switch assembly to said apparatus, said piston valve normally being biased closed to block fluid flow therethrough and being operated by said lever arm when the latter is pivotally operated by said trigger lever to permit fluid flow therethrough.
Claim 3
Dependent Claim
52 words
The fluid actuator device of claim 1, further including plunger sleeve means on said plunger for operating said trigger lever, said plunger sleeve means being adjustably positioned along the length of said plunger and thereby controlling the time of operation of said trigger lever as said plunger is extended through said bore.
Claim 4
Dependent Claim
26 words
The fluid actuator device of claim 2, wherein the length of said plunger sleeve means determines the time duration of the operation of said trigger lever.
Claim 5
Dependent Claim
34 words
The fluid actuator device of claim 3, further including a plurality of said plunger sleeve means each of a different length, whereby the time duration of the operation of said trigger lever is variable.
Claim 6
Dependent Claim
50 words
The fluid actuator device of claim 1, further including plunger sleeve means on said plunger for operating said trigger lever, the position and length of said plunger sleeve means both being adjustable, whereby the time of and the duration of the operation of said trigger lever can be variably controlled.
Claim 7
Dependent Claim
48 words
The fluid actuator device of claim 1, wherein said fluid switch assembly is adapted to be reversibly affixed to the other one of said stationary and movable beds, whereby said fluid actuator device can be made to operate on the downstroke or on the upstroke of said apparatus.
Claim 8
Dependent Claim
58 words
The fluid actuator device of claim 1, further including stop means, one end of said piston valve being engaged with said lever arm and normally biasing it against said stop means, an end of said trigger lever being disposed within said bore to be engaged by said plunger when said lever arm is biased against said stop means.
Claim 9
Dependent Claim
74 words
The fluid actuator device of claim 7, further comprising biasing means normally biasing said trigger lever in operative relationship with said lever arm, whereby said lever arm is pivotally operated by said trigger lever when said plunger is extended through said bore in said one direction, said plunger in being extended through said bore in the other direction opeRating said trigger lever against said biasing means out of operative engagement with said lever arm.
Claim 10
Dependent Claim
15 words
The fluid actuator device of claim 8, wherein said biasing means comprises a helical spring.
Claim 11
Dependent Claim
51 words
The fluid actuator device of claim 9, further including plunger sleeve means on said plunger for operating said trigger lever, the position and the length of said plunger sleeve means both being adjustable, whereby the time of and the duration of the operation of said trigger lever can be variably controlled.
References Cited (Backward Citations)
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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) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |