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US3583438A
Expired / Lapsed
US
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Safety arrangements in servo operated systems
Assignee: Firma Herion-Werke DG
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Filing: 1969-08-15
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Granted: 1971-06-08
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Expires: 1989-08-15
Abstract
Abstract A safety arrangement for a servosystem where arrangements are provided for safeguarding switching valves in the system and additional safeguarding is provided in the event of pipes in the system failing. The safety arrangement includes two solenoid valves linked through junction valves monitoring the pressure in the servosystem so that in the event of a failure or incorrect operation of the device operated by the servosystem, the safety arrangement will automatically stop the machine controlled by the servosystem.
Inventors
- 👤 Erich Ruchser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:31
CPC Classifications
B; B30; B30B; B30B15/00; B30B15/14; B30B15/142; F; F15; F15B; F15B20/00; F15B20/001; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87169; Y10T137/87193; Y10T137/87209
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
140 words
A safety control arrangement for a servo-controlled machine, such as a press, brake or chuck, comprising: a first solenoid valve; a piston mechanism, fluid-operated from the pressure source of the servosystem through said first solenoid valve; a first junction valve and a first switch, both movable with the piston mechanism; an actuator for the first junction valve and switch, operable by the servo-controlled machine, but only so operable when the piston mechanism does not operate properly due to a failure or erroneous operation in the servo system; a second junction valve and a second switch jointly movable by fluid from said source, through the first junction valve, said switches being in electric circuit with said solenoid valves; and means for supplying fluid pressure from said source, through the second solenoid and junction valves, to the pressure-responsive part of the servosystem.
Claim 2
Dependent Claim
140 words
A safety control arrangement for a servo-controlled machine, such as a press, brake or chuck, comprising: a first solenoid valve; a piston mechanism, fluid-operated from the pressure source of the servosystem through said first solenoid valve; a first junction valve and a first switch, both movable with the piston mechanism; an actuator for the first junction valve and switch, operable by the servo-controlled machine, but only so operable when the piston mechanism does not operate properly due to a failure or erroneous operation in the servo system; a second junction valve and a second switch jointly movable by fluid from said source, through the first junction valve, said switches being in electric circuit with said solenoid valves; and means for supplying fluid pressure from said source, through the second solenoid and junction valves, to the pressure-responsive part of the servosystem.
Claim 3
Dependent Claim
35 words
A safety control arrangement according to claim 1, also including a housing for each set of junction and solenoid valves, and means for shifting the junction valve, relative to its solenoid valve, in said housing.
Claim 4
Dependent Claim
33 words
A safety control arrangement according to claim 1, including structural support means for the first solenoid valve, junction valve, and switch, and similar means for the second solenoid valve, junction valve and switch.
Claim 5
Dependent Claim
31 words
A safety control arrangement according to claim 1, also including multiple switch means in the electric circuit of said solenoid valves, and means to operate the same from the servo-controlled machine.
Claim 6
Dependent Claim
37 words
A safety control arrangement according to claim 1 wherein the actuator of the first junction valve can be shifted a predetermined distance by the servo-controlled machine, and can be shifted additionally by the coordinated auxiliary piston mechanism.
References Cited (Backward Citations)
US3175470A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |