Patent US4100741A successfully refreshed from Google Patents.
US4100741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot-gas engine
Assignee: US Philips Corp
•
Filing: 1977-03-24
•
Granted: 1978-07-18
•
Expires: 1997-03-24
Abstract
Abstract A hot-gas engine in which the supply of fuel to the burner device is controlled by means of a control signal which is derived from a differential pressure signal which represents the volume flow of combustion air and which is corrected for variations in temperature and pressure of the ambient air.
Inventors
- 👤 Albertus Peter Johannes Michels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:11
CPC Classifications
F; F02; F02G; F02G1/00; F02G1/04; F02G1/043; F02G1/045; F02G1/047
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
185 words
A hot-gas engine, comprising at least one combustion chamber having connected to it at least one supply duct for combustion air, including a restriction, and at least one supply duct for fuel, the quantity of fuel to be supplied to the combustion chamber being controlled in proportion to the supplied quantity of combustion air by means of a control device which comprises a differential pressure sensor which communicates with the air supply duct upstream and downstream from the restriction, characterized in that upstream and downstream from the restriction a branch duct is connected to the air supply duct, said branch duct comprising a first duct portion which includes a first flow resistance element and a second duct portion which includes a second flow resistance element, the differential pressure sensor being connected to the first duct portion upstream and downstream from the first flow resistance element, the second flow resistance element being subject to control means which, by controlling the flow resistance in response to variations of ambient air temperature and pressure, correct the differential pressure to be sensed by the sensor for the said variations.
Claim 2
Dependent Claim
185 words
A hot-gas engine, comprising at least one combustion chamber having connected to it at least one supply duct for combustion air, including a restriction, and at least one supply duct for fuel, the quantity of fuel to be supplied to the combustion chamber being controlled in proportion to the supplied quantity of combustion air by means of a control device which comprises a differential pressure sensor which communicates with the air supply duct upstream and downstream from the restriction, characterized in that upstream and downstream from the restriction a branch duct is connected to the air supply duct, said branch duct comprising a first duct portion which includes a first flow resistance element and a second duct portion which includes a second flow resistance element, the differential pressure sensor being connected to the first duct portion upstream and downstream from the first flow resistance element, the second flow resistance element being subject to control means which, by controlling the flow resistance in response to variations of ambient air temperature and pressure, correct the differential pressure to be sensed by the sensor for the said variations.
Claim 3
Dependent Claim
18 words
A hot-gas engine as claimed in claim 1, characterized in that the first flow resistance element is adjustable.
Claim 4
Dependent Claim
38 words
A hot-gas engine as claimed in claim 1, characterized in that a third flow resistance element which is connected to the first branch duct portion upstream and downstream from the first flow resistance element can be switched on.
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) | 1981-07-17 | 1982-01-16 | 1982-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-17 | 1986-01-16 | 1986-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-17 | 1990-01-16 | 1990-07-18 | $7700.00 | Window Closed / Lapsed |