US3618890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermostatically controlled airflow regulator
Assignee: Robert Bosch GmbH
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Filing: 1970-08-06
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Granted: 1971-11-09
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Expires: 1990-08-06
Abstract
Abstract A housing has a passage provided with a surface portion defining a valve seat. An inlet and an outlet terminate in this surface portion and each have an exposed cross section. A cup-shaped member of insulating material is located in the aforementioned passage longitudinally spaced from the valve seat. An electric heating device is arranged in the cup-shaped member and a bimetallic coil is located in the passage partly received in the cup-shaped member and having a freely movable end portion capable of movement circumferentially of the passage in response to temperature fluctuations. A rotary valve member engages the valve seat and is connected with the end portion so as to be rotated by the latter with corresponding variations in the exposed cross sections of the inlet and outlet.
Inventors
- 👤 Hans-Dieter Bastam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:00
CPC Classifications
F; F02; F02M; F02M69/00; F02M69/30; F02M69/32
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
136 words
A thermostatically controlled airflow regulator, particularly for use with combustion engines having fuel injection, comprising in combination, a housing having a passage provided with a surface portion defining a valve seat; inlet means and outlet means in said surface portion and each having an exposed cross section; a cup-shaped member of insulating material in said passage spaced longitudinally of the same from said valve seat; an electric heating device in said cup-shaped member; a bimetallic coil in said passage partly received in said member and having a freely movable end portion capable of movement circumferentially of sAid passage in response to temperature fluctuations; and a rotary valve member engaging said valve seat and connected with said end portion for rotation thereby with corresponding variations in the exposed cross sections of said inlet means and outlet means.
Claim 2
Dependent Claim
136 words
A thermostatically controlled airflow regulator, particularly for use with combustion engines having fuel injection, comprising in combination, a housing having a passage provided with a surface portion defining a valve seat; inlet means and outlet means in said surface portion and each having an exposed cross section; a cup-shaped member of insulating material in said passage spaced longitudinally of the same from said valve seat; an electric heating device in said cup-shaped member; a bimetallic coil in said passage partly received in said member and having a freely movable end portion capable of movement circumferentially of sAid passage in response to temperature fluctuations; and a rotary valve member engaging said valve seat and connected with said end portion for rotation thereby with corresponding variations in the exposed cross sections of said inlet means and outlet means.
Claim 3
Dependent Claim
44 words
An airflow regulator as defined in claim 1, said valve member having an axis and being at least in part of hollow configuration; and wherein one of said means communicates with the hollow interior of said valve member in axial direction of the latter.
Claim 4
Dependent Claim
46 words
An airflow regulator as defined in claim 1, said passage having a transverse endwall longitudinally spaced from said valve seat, and said cup-shaped member overlying said endwall and having an open side facing towards said valve seat; and securing means securing said member to said endwall.
Claim 5
Dependent Claim
42 words
An airflow regulator as defined in claim 3, said securing means comprising rivets at least some of which are at least in part electrically conductively connected with said electric heating device and adapted to be connected to a source of electrical energy.
Claim 6
Dependent Claim
30 words
An airflow regulator as defined in claim 1, said heating device having a variable heating capacity which decreases in response to an increase in the temperature of said heating device.
Claim 7
Dependent Claim
16 words
An airflow regulator as defined in claim 5, said heating device comprising an electric heating element.
Claim 8
Dependent Claim
29 words
An airflow regulator as defined in claim 6, said electric heating element consisting at least essentially of a material the electrical resistance of which has a positive temperature coefficient.
Claim 9
Dependent Claim
19 words
An airflow regulator as defined in claim 1, said member consisting at least in part of electrically insulating material.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |