Patent US3872876A successfully refreshed from Google Patents.
US3872876A
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US
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Pneumatic Control
Assignee: Luwa Ltd
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Filing: 1973-10-09
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Granted: 1975-03-25
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Expires: 1993-10-09
Abstract
Abstract A pneumatic control for automatically repeating an operational cycle, especially a movement cycle, comprising a series connection of a logical NOT-element and at least two logical timing-elements, each timing element having a respective throttle, volume chamber and identity-element, means for feeding essentially the same input reference signal to the input side of the identity-element, a supply conduit for a supply pressure with which the NOT-element is connected, the last logical timingelement having an outlet, and a switching conduit for connecting the outlet of the last timing-element of the control with the NOT-element.
Inventors
- 👤 Robert Theophil Bachman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:55
CPC Classifications
F; F15; F15B; F15B21/00; F15B21/02; F15B11/00; F15B11/08; F15B11/15; G; G05; G05B; G05B19/00; G05B19/43; G05B19/44; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/265; Y10T137/8593; Y10T137/86389; Y10T137/86405; Y10T137/86413; Y10T137/86421; Y10T137/86445; Y10T137/86461
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
143 words
A pneumatic control for automatically repeating an operational cycle, especially a movement cycle, comprising a series connection of a logical NOT-element and at least two logical timing elements, each logical timing element having an input side and an output side and a respective throttle, volume chamber and identity-element, each identity-element having an input side, means for feeding essentially the same input reference signal to the input side of each identity-element, a supply conduit for a supply pressure with which the NOT-element is connected, the last logical timing element having an outlet, a switching conduit for connecting the outlet of the last timing elemeNt of the control with the NOT-element, and means for removing from at least one of said logical timing elements a respective output signal at both the input side and the output side of said at least one logical timing element.
Claim 2
Dependent Claim
143 words
A pneumatic control for automatically repeating an operational cycle, especially a movement cycle, comprising a series connection of a logical NOT-element and at least two logical timing elements, each logical timing element having an input side and an output side and a respective throttle, volume chamber and identity-element, each identity-element having an input side, means for feeding essentially the same input reference signal to the input side of each identity-element, a supply conduit for a supply pressure with which the NOT-element is connected, the last logical timing element having an outlet, a switching conduit for connecting the outlet of the last timing elemeNt of the control with the NOT-element, and means for removing from at least one of said logical timing elements a respective output signal at both the input side and the output side of said at least one logical timing element.
Claim 3
Dependent Claim
31 words
The pneumatic control as defined in claim 1, wherein the feeding means comprises a common source for feeding essentially the same input reference signal to the input side of each identity-element.
Claim 4
Dependent Claim
216 words
A pneumatic control for automatically repeating an operational cycle, especially a movement cycle, comprising a series connection of a logical NOT-element and at least two logical timing elements, each timing element having a respective throttle, volume chamber and identity-element, each identity-element having an input side, means for feeding essentially the same input reference signal to the input side of each identity-element, a supply conduit for a supply pressure with which the NOT-element is connected, the last logical timing element having an outlet, a switching conduit for connecting the outlet of the last timing element of the control with the NOT-element, each logical timing element having an input and an output, a respective said logical NOT-element connected between the input and output of each associated logical timing element, each logical NOT-element having two inputs and an output, one of said inputs being connected with the input of the associated logical timing element and the other input being connected with the output of such associated timing element, and wherein a signal appears at the output of each logical NOT-element when only one of the inputs thereof carries a signal thereon, and further wherein the signal appearing at the output of each logical timing element serves to negate the signal appearing at the output of each associated logical NOT-element.
Claim 5
Dependent Claim
216 words
A pneumatic control for automatically repeating an operational cycle, especially a movement cycle, comprising a series connection of a logical NOT-element and at least two logical timing elements, each timing element having a respective throttle, volume chamber and identity-element, each identity-element having an input side, means for feeding essentially the same input reference signal to the input side of each identity-element, a supply conduit for a supply pressure with which the NOT-element is connected, the last logical timing element having an outlet, a switching conduit for connecting the outlet of the last timing element of the control with the NOT-element, each logical timing element having an input and an output, a respective said logical NOT-element connected between the input and output of each associated logical timing element, each logical NOT-element having two inputs and an output, one of said inputs being connected with the input of the associated logical timing element and the other input being connected with the output of such associated timing element, and wherein a signal appears at the output of each logical NOT-element when only one of the inputs thereof carries a signal thereon, and further wherein the signal appearing at the output of each logical timing element serves to negate the signal appearing at the output of each associated logical NOT-element.
Claim 6
Dependent Claim
127 words
A pneumatic control for automatically repeating an operational cycle, especially a movement cycle, comprising a series connection of a logical NOT-element and at least two logical timing elements, each timing element having a respective throttle, volume chamber and identity-element, each identity-element having an input side, means for feeding essentially the same input reference signal to the input side of each identity-element, a supply conduit for a supply pressure with which the NOT-element is connected, the last logical timing element having an outlet, and a switching conduit for connecting the outlet of the last timing element of the control with the NOT-element, and wherein the output signal of the first of said series connected logical timing elements serves as an input signal for each of two logical NOT-elements.
Claim 7
Dependent Claim
127 words
A pneumatic control for automatically repeating an operational cycle, especially a movement cycle, comprising a series connection of a logical NOT-element and at least two logical timing elements, each timing element having a respective throttle, volume chamber and identity-element, each identity-element having an input side, means for feeding essentially the same input reference signal to the input side of each identity-element, a supply conduit for a supply pressure with which the NOT-element is connected, the last logical timing element having an outlet, and a switching conduit for connecting the outlet of the last timing element of the control with the NOT-element, and wherein the output signal of the first of said series connected logical timing elements serves as an input signal for each of two logical NOT-elements.
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) | 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 |