US3577726A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel system for natural gas turbocharged engine
Assignee: Caterpillar Inc
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Filing: 1969-07-24
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Granted: 1971-05-04
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Expires: 1989-07-24
Abstract
Abstract A turbocharged natural gas engine adapted for use with very low pressure gas by virtue of introducing the gas and combining it with air to provide a combustible mixture upstream of or on the low pressure side of the turbocharger. Safety means are provided to insure against damage by backfire and against admission of explosive gases to the engine crankcase.
Inventors
- 👤 Harold H Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:35
CPC Classifications
F; F02; F02M; F02M21/00; F02M21/02; F02M21/0218; F02M21/0293; F02B; F02B33/00; F02B33/44; F02B43/00; F02M35/00; F02M35/10; F02M35/10209; F02M35/10236; F02M35/10242; F02M35/10275; F02B2710/00; F02B2710/02; F02B2710/023; F02B29/00; F02B29/04; F02B29/0406; F02B37/00; F02M21/0203; F02M21/0215; F02M21/023; F02M21/0239; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/30
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
39 words
The invention of claim 1 in which the backfire pressure relief device has a wire screen to dissipate heat from backfire gas positioned to prevent flame from moving upstream in the direction of fluid flow through the fuel system.
Claim 2
Dependent Claim
44 words
The invention of claim 1 wherein the backfire pressure relief device includes a chamber defined by walls and a cover member which directly separates the interior of said chamber from the ambient and is yieldingly urged to close off said chamber from said ambient.
Claim 3
Dependent Claim
94 words
In a fuel system for turbocharged natural gas engine; a turbocharger, conduit means directing air to the turbocharger from the upstream side thereof in the direction of flow through said turbocharger, means for admitting gas into said conduit means to provide a combustible fuel mixture upstream of said turbocharger, a crankcase for said turbocharged engine, a conduit connected between said turbocharger and said crankcase through which turbocharger lubricating oil is drained to said crankcase, and a gas-oil separator to separate any combustible fuel mixture which may pass with said lubricating oil through said conduit.
Claim 4
Dependent Claim
21 words
The invention of claim 4 with means for directing the separated fuel mixture back into the system upstream of the turbocharger.
References Cited (Backward Citations)
US1138628A
Cited
US1835299A
Cited
US2511348A
Cited
US3052085A
Cited
US3077189A
Cited
US3464202A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |