US4352342A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic ventilation apparatus for liquid systems with forced flow
Assignee: Autoipari Kutato Intezet
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Filing: 1979-11-29
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Granted: 1982-10-05
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Expires: 1999-11-29
Abstract
Abstract An engine-cooling system has each of the vent pipes connecting a geodetic high point with the expansion tank provided with a hydrodynamic flow-controlling throttle which provides substantially unobstructed flow to air and provides increasing flow resistance with increasing liquid flow throughput of the coolant-circulating pump.
Inventors
- 👤 Gyula Cser
- 👤 Arpad Pataki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:39
CPC Classifications
F; F01; F01P; F01P11/00; F01P11/02; F01P11/028
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
158 words
An automatic venting liquid-coolant engine-cooling system for a combustion engine of a motor vehicle, comprising: an engine having liquid-coolant spaces, means forming a circulating path for liquid coolant connected with said spaces and a pump in said path, said path having a plurality of geodetic high points at which air can accumulate; an expansion tank having a fall pipe connected to said pump at an intake side thereof; respective vent pipes each connecting one of said geodetic high points to said expansion tank; and a respective variable flow throttle in each of said vent pipes provided with means affording substantially free flow of gas past the flow throttle to said expansion tank but generating a flow-throttling effect upon traversal by liquid during the forced displacement thereof by said pump, said housing having a substantially cylindrical chamber fed tangentially by an inlet pipe and provided with an outlet coaxial with the chamber and extending outwardly from the type thereof.
Claim 2
Dependent Claim
158 words
An automatic venting liquid-coolant engine-cooling system for a combustion engine of a motor vehicle, comprising: an engine having liquid-coolant spaces, means forming a circulating path for liquid coolant connected with said spaces and a pump in said path, said path having a plurality of geodetic high points at which air can accumulate; an expansion tank having a fall pipe connected to said pump at an intake side thereof; respective vent pipes each connecting one of said geodetic high points to said expansion tank; and a respective variable flow throttle in each of said vent pipes provided with means affording substantially free flow of gas past the flow throttle to said expansion tank but generating a flow-throttling effect upon traversal by liquid during the forced displacement thereof by said pump, said housing having a substantially cylindrical chamber fed tangentially by an inlet pipe and provided with an outlet coaxial with the chamber and extending outwardly from the type thereof.
Claim 3
Dependent Claim
145 words
An automatic venting liquid-coolant engine-cooling system for a combustion engine of a motor vehicle, comprising: an engine having liquid-coolant spaces, means forming a circulating path for liquid coolant connected with said spaces and a pump in said path, said path having a plurality of geodetic high points at which air can accumulate; an expansion tank having a fall pipe connected to said pump at an intake side thereof; respective vent pipes each connecting one of said geodetic high points to said expansion tank; and a respective variable flow throttle in each of said vent pipes provided with means affording substantially free flow of gas past the flow throttle to said expansion tank but generating a flow-throttling effect upon traversal by liquid during the forced displacement thereof by said pump, said housing being formed with a whirl-generating element imparting vortex flow to liquid traversing said chamber.
Claim 4
Dependent Claim
145 words
An automatic venting liquid-coolant engine-cooling system for a combustion engine of a motor vehicle, comprising: an engine having liquid-coolant spaces, means forming a circulating path for liquid coolant connected with said spaces and a pump in said path, said path having a plurality of geodetic high points at which air can accumulate; an expansion tank having a fall pipe connected to said pump at an intake side thereof; respective vent pipes each connecting one of said geodetic high points to said expansion tank; and a respective variable flow throttle in each of said vent pipes provided with means affording substantially free flow of gas past the flow throttle to said expansion tank but generating a flow-throttling effect upon traversal by liquid during the forced displacement thereof by said pump, said housing being formed with a whirl-generating element imparting vortex flow to liquid traversing said chamber.
Claim 5
Dependent Claim
35 words
The system defined in claim 1 or claim 2 wherein a further vent pipe is connected from another geodetic high point to one of the first mentioned vent pipes ahead of the flow throttle thereof.
References Cited (Backward Citations)
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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) | 1985-10-04 | 1986-04-05 | 1986-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-04 | 1990-04-05 | 1990-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-04 | 1994-04-05 | 1994-10-05 | $7700.00 | Window Closed / Lapsed |