US3752193A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic two-position controller
Assignee: JC Eckardt AG
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Filing: 1971-03-25
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Granted: 1973-08-14
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Expires: 1991-03-25
Abstract
Abstract A pneumatic two-position controller in which the control point is adjusted pneumatically by means of a pressure distributor network connected between one output of a differential pressure amplifier and a source of auxiliary pressure, the pressure distributor network providing the control point pressure to one input of the differential pressure amplifier.
Inventors
- 👤 H Bader
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:20
CPC Classifications
F; F15; F15C; F15C3/00; F15C3/04; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/218; Y10T137/2202; Y10T137/8593; Y10T137/86493; Y10T137/86879
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
97 words
A pneumatic two-position controller comprising: a differential pressure amplifier having first and second input pressure chambers defined by elastic walls, said first chamber being supplied with a first pressure to be controlled, said second chamber being supplied with a second control point pressure, and said amplifier providing at least one output resulting from control of an input pressure by said first and second pressures and proportional to the difference between said first and second pressures, and pressure distributor means for providing said second pressure to said amplifier in response to at least one of said amplifier outputs.
Claim 2
Dependent Claim
97 words
A pneumatic two-position controller comprising: a differential pressure amplifier having first and second input pressure chambers defined by elastic walls, said first chamber being supplied with a first pressure to be controlled, said second chamber being supplied with a second control point pressure, and said amplifier providing at least one output resulting from control of an input pressure by said first and second pressures and proportional to the difference between said first and second pressures, and pressure distributor means for providing said second pressure to said amplifier in response to at least one of said amplifier outputs.
Claim 3
Dependent Claim
32 words
A pneumatic two-position controller as defined in claim 1, wherein said pressure distributor means includes pressure divider means for providing only a portion of one of said amplifier outputs to said amplifier.
Claim 4
Dependent Claim
56 words
A pneumatic two-position controller as defined in claim 1, wherein said pressure distributor means includes a pair of fluid throttle resistors connected in series between one output of said amplifier and an auxiliary pressure source, said second pressure supplied to said second chamber of the differential pressure amplifier being derived from a point between said resistors.
Claim 5
Dependent Claim
16 words
A pneumatic two-position controller as defined in claim 3, wherein one of said resistors is variable.
Claim 6
Dependent Claim
29 words
A pneumatic two-position controller as defined in claim 3, wherein said auxiliary pressure source includes an additional pressure distributor means connected to said input pressure supplied to said amplifier.
Claim 7
Dependent Claim
61 words
A pneumatic two-position controller as defined in claim 3, wherein said pressure distributor means is connected at one end to said one output of said amplifier through additional pressure distributor means including an additional pair of fluid throttle resistors connected in series to said one output, said pressure distributor means being connected to a point between said additional pair of resistors.
Claim 8
Dependent Claim
21 words
A pneumatic two-position controller as defined in claim 6, wherein one of said additional pair of fluid throttle resistors is variable.
Claim 9
Dependent Claim
39 words
A pneumatic two-position controller as defined in claim 6, wherein said amplifier provides first and second reciprocally varying outputs responsive to said input pressure controlled by said first and second pressures applied to said first and second chambers, respectively.
Claim 10
Dependent Claim
27 words
A pneumatic two-position controller as defined in claim 8, wherein the other end of said pressure distributor means is connected to the other output of said amplifier.
Claim 11
Dependent Claim
21 words
A pneumatic two-position controller as defined in claim 9, wherein one of said additional pair of fluid throttle resistors is variable.
Claim 12
Dependent Claim
107 words
A pneumatic two-position controller as defined in claim 1, wherein said differential amplifier includes first and second balls of identical diameter displaceably arranged in the bore of a housing, said balls being operatively connected to the elastic wall of a respective one of said first and second input pressure chambers so as to be displaced by movement thereof, said housing being provided with a pair of output bores spaced by the diameter of the balls and in alignment so as to be valved by said balls and an input bore providing said input pressure to said balls for application to said output bores in a controlled manner.
Claim 13
Dependent Claim
56 words
A pneumatic two-position controller as defined in claim 11, wherein said pressure distributor means includes a pair of fluid throttle resistors connected in series between one output of said amplifier and an auxiliary pressure source, said second pressure supplied to said second chamber of the differential pressure amplifier being derived from a point between said resistors.
Claim 14
Dependent Claim
34 words
A pneumatic two-position controller as defined in claim 12, wherein said auxiliary pressure source includes an additional pressure distributor means connected to said input pressure supplied to said input pressure supplied to said amplifier.
Claim 15
Dependent Claim
61 words
A pneumatic two-position controller as defined in claim 13, wherein said pressure distributor means is connected at one end to said one output of said amplifier through additional pressure distributor means including an additional pair of fluid throttle resistors connected in series to said one output, said pressure distributor means being connected to a point between said additional pair of resistors.
Claim 16
Dependent Claim
27 words
A pneumatic two-position controller as defined in claim 14, wherein the other end of said pressure distributor means is connected to the other output of said amplifier.
Claim 17
Dependent Claim
28 words
A pneumatic two-position controller as defined in cLaim 15, wherein one fluid throttle resistor in said pressure distributor means and in said additional pressure distributor means is variable.
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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) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |