US3816030A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic-functioning breather device
Assignee: Langen and Co
•
Filing: 1972-11-24
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Granted: 1974-06-11
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Expires: 1992-11-24
Abstract
Abstract An automatically-functioning breather system for one or more pumps in which a variable volume chamber communicates, in series, with a restrictor and with the atmosphere through a normally open control valve having a valving element normally urged to an ''''open'''' position and in which the control valve communicates with the pump output to which the valving element is subjected to close off communication with the atmosphere during predetermined pressure output conditions of said pump.
Inventors
- 👤 G Strauff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:08
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
147 words
In a hydraulic pressure-system comprising at least one pump having means for periodically generating hydraulic pressure, said pump means including a variable-volume pressure-chamber having fluid control inlet and outlet means, an automaticallyfunctioning air-exhaust means operatively connected to said variable-volume chamber by throttle means connected in series with said variable-volume chamber and including valving means having a portion normally communicating with liquid at atmospheric pressure, said air exhaust means including means normally biasing said valving means to a ''''valve-open'''' condition whereby air relief is provided for said variable-volume chamber prior to hydraulic pressure build-up, said variable-volume chamber outlet means communicating with said valving means and subjecting it to hydraulic pressures generated therein and subjecting said valving means to said hydraulic pressure in opposition to said means normally biasing the valving means to the ''''valve-open'''' condition or urging the valving means to a ''''valve-closed'''' position at predetermined hydraulic pressures.
Claim 2
Dependent Claim
147 words
In a hydraulic pressure-system comprising at least one pump having means for periodically generating hydraulic pressure, said pump means including a variable-volume pressure-chamber having fluid control inlet and outlet means, an automaticallyfunctioning air-exhaust means operatively connected to said variable-volume chamber by throttle means connected in series with said variable-volume chamber and including valving means having a portion normally communicating with liquid at atmospheric pressure, said air exhaust means including means normally biasing said valving means to a ''''valve-open'''' condition whereby air relief is provided for said variable-volume chamber prior to hydraulic pressure build-up, said variable-volume chamber outlet means communicating with said valving means and subjecting it to hydraulic pressures generated therein and subjecting said valving means to said hydraulic pressure in opposition to said means normally biasing the valving means to the ''''valve-open'''' condition or urging the valving means to a ''''valve-closed'''' position at predetermined hydraulic pressures.
Claim 3
Dependent Claim
34 words
The system as claimed in claim 1 in which said fluid control inlet and outlet means comprise one-way valves, said throttle means being connected to said variable-volume chamber downstream of the outlet one-way valve.
Claim 4
Dependent Claim
74 words
The system as claimed in claim 2 in which said valving means of said air-exhaust means comprises a piston element, said biasing means comprising a spring means engaging said piston element, said piston being subject at one end to hydraulic pressure generated in said variable-volume chamber in opposition to said spring means and being subject to the throttle pressure at the other end for reacting on said piston in conjunction with said spring means.
Claim 5
Dependent Claim
62 words
In the system as claimed in claim 1, a second pump having a variable-volume chamber operatively connected in series through throttling means to said air-exhaust means and substantially duplicating the function of said first-mentioned pump, said pump having means communicating hydraulic pressure generated to said air-exhaust means for urging the valving means to a ''''valve-closed'''' position after hydraulic pressure is built up.
Claim 6
Dependent Claim
170 words
In the system as claimed in claim 4 in which pumps are of the piston-and-cylinder type and said variable-volume chambers are defined by movement of a piston in a cylinder, said throttle means comprising individual conduits Having intermediate integral throttle portions for limiting pressurized liquid passing therethrough, said valve means comprising a reciprocable piston element disposed in a passage portion of said valve means, spring means normally acting on said piston element and urging it in one direction, an inlet communicating with the pressure generated in the pumps and connected to the passage portion of said piston in opposition to said spring means, said individual conduits being connected to said piston passage for normally communicating through a body of liquid to the atmosphere at one end of said piston element, said passage portion having an atmosphere port in substantial alignment with the connection of the individual conduits at the one end of the piston element whereby the piston element controls air-exhaust communication between said individual conduits and said atmosphere port.
Claim 7
Dependent Claim
47 words
In the system as claimed in claim 5, in which said passage portion includes stop portions therein in the path of travel of said piston element for positively orienting the piston relative to the inlet, atmosphere port and connections of the individual conduits with the passage portion.
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) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |