Patent US4893469A successfully refreshed from Google Patents.
US4893469A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steam and combustion gas engine
Assignee: Individual
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Filing: 1988-01-07
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Granted: 1990-01-16
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Expires: 2008-01-07
Abstract
Abstract An engine utilizes a powdered biomass fuel that is ignited to heat water which is spray injected into a turbine section. The heated water converts into steam turning the turbine blades through its expansion. A combustion chamber is separate from a steam expansion chamber with heat being directed through communicating passageways.
Inventors
- 👤 Yasui Yamashita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:35
CPC Classifications
F; F01; F01K; F01K3/00; F01K3/18; F01K3/24; F01K3/247; F01K21/00; F01K21/04; F01K21/047; Y; Y02; Y02E; Y02E20/00; Y02E20/12
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
175 words
An internal combustion engine using a powdered biomass fuel to heat water into steam, including: an expansion chamber containing a drive shaft, turbine blades affixed to said drive shaft; a compression chamber disposed at a front end of said expansion chamber and having an air inlet, said compression chamber and said expansion chamber communicating through an aperture disposed between said expansion and compression chambers; a combustion chamber laterally offset from said expansion chamber and communicating with said expansion chamber through one or more openings disposed between said expansion and combustion chambers; supply and feed means delivering said powdered fuel into sid combustion chamber; means to ignite said powdered biomass fuel within said combustion chamber; means to spray water into said expansion chamber; an exhaust chamber communicating with said expansion chamber and disposed at an end of said expansion chamber opposite said compression chamber; whereby ignition of said powdered biomass fuel heats said water in said expansion chamber, converting said water into steam, which expands and turns said turbine blades and drive shaft, providing power. PG,7
Claim 2
Dependent Claim
175 words
An internal combustion engine using a powdered biomass fuel to heat water into steam, including: an expansion chamber containing a drive shaft, turbine blades affixed to said drive shaft; a compression chamber disposed at a front end of said expansion chamber and having an air inlet, said compression chamber and said expansion chamber communicating through an aperture disposed between said expansion and compression chambers; a combustion chamber laterally offset from said expansion chamber and communicating with said expansion chamber through one or more openings disposed between said expansion and combustion chambers; supply and feed means delivering said powdered fuel into sid combustion chamber; means to ignite said powdered biomass fuel within said combustion chamber; means to spray water into said expansion chamber; an exhaust chamber communicating with said expansion chamber and disposed at an end of said expansion chamber opposite said compression chamber; whereby ignition of said powdered biomass fuel heats said water in said expansion chamber, converting said water into steam, which expands and turns said turbine blades and drive shaft, providing power. PG,7
Claim 3
Dependent Claim
46 words
The internal combustion engine according to claim 1, wherein: said drive shaft extends through said compression chamber and having compressor blades affixed thereto inside said compression chamber, and an external fan blade disposed on said drive shaft outside of said compression chamber adjacent said air inlet.
Claim 4
Dependent Claim
39 words
The internal combustion engine according to claim 1, wherein: said exhaust chamber includes a cooling coil to convert said steam into water; and said exhaust chamber includes exhaust openings to allow liquid residue to drain into a collection vessel.
Claim 5
Dependent Claim
52 words
The internal combustion chamber according to claim 1, wherein: said means to spray water into said expansion chamber includes a circumferential collar surrounding said drive shaft, said collar having multiple discharge apertures circumferentially disposed around said collar from which water is discharged, and said collar having means to feed said discharge apertures.
Claim 6
Dependent Claim
30 words
The internal combustion engine according to claim 1, wherein: said means to feed said powdered fuel includes a rotating screw disposed between said supply of fuel and said combustion chamber.
Claim 7
Dependent Claim
26 words
The internal combustion engine according to claim 1, wherein: said means to ignite said fuel includes a continuously heated metal rod disposed within said combustion chamber.
Claim 8
Dependent Claim
35 words
The internal combustion engine according to claim 1, wherein: said fuel comprises a mixture of powdered charcoal, powdered coal, gun powder, alcohol, water and powdered biomass including farm, forest and garden residues and waste paper.
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) | 1993-01-15 | 1993-07-17 | 1994-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-15 | 1997-07-17 | 1998-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-15 | 2001-07-17 | 2002-01-16 | $7700.00 | Window Closed / Lapsed |