US3635240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electropneumatic transducer and pneumatic web tensioning system
Assignee: Zerand Corp
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Filing: 1969-11-21
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Granted: 1972-01-18
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Expires: 1989-11-21
Abstract
Abstract An electropneumatic transducer having a pneumatic pressure regulator operatively controlled by a solenoid, an adjustable spring biasing assembly connected to the regulator and solenoid to maintain the moving parts of the transducer in a normally closed position and to minimize vibratory motion induced in the moving parts. A diaphragm arrangement is connected to respond to the output pressure of the regulator to introduce an additional force to the force of the solenoid. The inherent friction of the solenoid is reduced by a linear bearing arrangement. A pneumatic web tensioning system utilizing such an electropneumatic transducer.
Inventors
- 👤 George Vischulis
- 👤 Charles K Sedlak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:48
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/20; F15B15/28; F15B15/2815; F15B15/2853; F15B15/2838; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7782
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
81 words
An electropneumatic transducer comprising, a pressureregulating valve having an inlet and an outlet, a solenoid operatively connected to said valve to control the flow of air through said valve, spring means connected with and for maintaining the moving parts of said solenoid and said pressureregulating valve in a normally closed stable position, and means for applying an operating force to said valve other than the force of said solenoid in response to an increase in the output pressure of said valve.
Claim 2
Dependent Claim
81 words
An electropneumatic transducer comprising, a pressureregulating valve having an inlet and an outlet, a solenoid operatively connected to said valve to control the flow of air through said valve, spring means connected with and for maintaining the moving parts of said solenoid and said pressureregulating valve in a normally closed stable position, and means for applying an operating force to said valve other than the force of said solenoid in response to an increase in the output pressure of said valve.
Claim 3
Dependent Claim
23 words
An electropneumatic transducer according to claim 1 wherein said maintaining means includes a pair of opposing springs having substantially the same spring rate.
Claim 4
Dependent Claim
28 words
An electropneumatic transducer according to claim 2 wherein the spring rate of said springs has a natural frequency higher than the contemplated frequency of operation of said solenoid.
Claim 5
Dependent Claim
18 words
An electropneumatic transducer according to claim 1 including means for reducing friction in the movement of said solenoid.
Claim 6
Dependent Claim
19 words
An electropneumatic transducer according to claim 4 wherein said friction reducing means comprises a pair of linear ball bearings.
Claim 7
Dependent Claim
98 words
An electropneumatic transducer comprising, a pressure-regulating valve having an inlet and an outlet, a solenoid connected to open said valve to control the flow of air through said valve, and means for applying an operating force to said valve other than the force of said solenoid in response to the increase of the output pressure in said valve, said force applying means including a pair of diaphragms of different diameter connected to said valve and being responsive to the output pressure of said regulating valve to provide a force which increases directly with an increase in output pressure.
Claim 8
Dependent Claim
98 words
An electropneumatic transducer comprising, a pressure-regulating valve having an inlet and an outlet, a solenoid connected to open said valve to control the flow of air through said valve, and means for applying an operating force to said valve other than the force of said solenoid in response to the increase of the output pressure in said valve, said force applying means including a pair of diaphragms of different diameter connected to said valve and being responsive to the output pressure of said regulating valve to provide a force which increases directly with an increase in output pressure.
Claim 9
Dependent Claim
29 words
An electropneumatic transducer according to claim 6 including means connected to said pressure-regulating valve and said solenoid for maintaining the moving parts of said transducer in a stable condition.
Claim 10
Dependent Claim
134 words
An electropneumatic transducer connected to respond to a remote electric control signal to control the operation of a pressure responsive device, said transducer comprising, a pressure regulator having an inlet connected to a source of high-pressure air, an outlet connected to said device and a normally closed valve to control the flow of air from said inlet to said outlet, a solenoid connected to respond to said signal and connected to open said valve, counteracting spring means connected to said solenoid for presetting said solenoid and said valve in a normally closed position and for eliminating vibratory motions in said valve, and means connected to said solenoid for applying an operating force to said valve other than the force of said solenoid in response to an increase in the outlet pressure of said valve.
Claim 11
Dependent Claim
134 words
An electropneumatic transducer connected to respond to a remote electric control signal to control the operation of a pressure responsive device, said transducer comprising, a pressure regulator having an inlet connected to a source of high-pressure air, an outlet connected to said device and a normally closed valve to control the flow of air from said inlet to said outlet, a solenoid connected to respond to said signal and connected to open said valve, counteracting spring means connected to said solenoid for presetting said solenoid and said valve in a normally closed position and for eliminating vibratory motions in said valve, and means connected to said solenoid for applying an operating force to said valve other than the force of said solenoid in response to an increase in the outlet pressure of said valve.
Claim 12
Dependent Claim
35 words
A transducer according to claim 8 wherein said force applying means includes a pressure responsive diaphragm connected to said solenoid to provide a force to said solenoid proportional to the outlet pressure of said valve.
Claim 13
Dependent Claim
20 words
A transducer according to claim 8 wherein said spring means includes a pair of opposing springs connected to said solenoid.
Claim 14
Dependent Claim
30 words
A transducer according to claim 10 including means for adjusting the force of one of said springs to preset the force required to operate the regulator at zero output pressure.
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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) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |