Patent US3672172A successfully refreshed from Google Patents.
US3672172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Simplified supercharged internal combustion engine with emissions control
Assignee: Individual
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Filing: 1971-03-15
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Granted: 1972-06-27
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Expires: 1991-03-15
Abstract
Abstract Internal supercharging of non-radial, reciprocating internal combustion engines is achieved by means of a unique form of crankcase compression. The engine includes a sealed crankcase and a first one-way valve in fluid communication with the crankcase and disposed so that external air is induced into the crankcase upon movement of the piston in one direction. An air reservoir is provided in fluid communication with the crankcase and a second one-way valve is disposed between the crankcase and the air reservoir so that air in the crankcase is forced into the reservoir upon movement of the piston in the reverse direction, the net effect being a positive displacement supercharger. Passageways are provided for introducing the resulting pressurized air into the cylinder and separately into the exhaust for afterburning purposes, a pressure regulator proportioning the airflows thereto. The pressurized air also pressurizes the fuel tank and thus the fuel supply to the engine. In a particular embodiment a lubricating oil reservoir is provided adjacent the air reservoir with air-oil separator means therebetween.
Inventors
- 👤 Gary L Hammond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:46
CPC Classifications
F; F02; F02B; F02B33/00; F02B33/02; F02B33/26; F01; F01M; F01M11/00; F01M11/08; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/18; F01N3/22; F01N3/24; F01N3/30; F02B1/00; F02B25/00; F02B75/00; F02B75/02; F02B2075/022; F02B2075/027; F02B2720/00; F02B2720/13; F02B2720/133; F02M; F02M2700/00; F02M2700/43; F02M2700/4302; F02M2700/438; F02M2700/4383; F02M2700/4385; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
157 words
A supercharged internal combustion engine comprising in combination: a. a cylinder with inlet and exhaust passages; b. a piston reciprocally disposed within said cylinder, said piston having a piston rod secured thereto; c. a crank assembly secured to said piston rod for translating reciprocating movement of the piston into rotary movement, said crank assembly being housed within a crankcase sealed pressurewise relative to said cylinder; d. a first one-way valve means in fluid communication with said crankcase and disposed so that external air is induced into said crankcase upon movement of said piston in one direction; e. an air reservoir in fluid communicaTion with said crankcase; f. a second one-way valve means disposed between said crankcase and said air reservoir so that air in said crankcase is forced into said reservoir upon movement of said piston in the reverse direction; and g. a passageway for pressurized air between said air reservoir and said inlet and exhaust passages.
Claim 2
Dependent Claim
157 words
A supercharged internal combustion engine comprising in combination: a. a cylinder with inlet and exhaust passages; b. a piston reciprocally disposed within said cylinder, said piston having a piston rod secured thereto; c. a crank assembly secured to said piston rod for translating reciprocating movement of the piston into rotary movement, said crank assembly being housed within a crankcase sealed pressurewise relative to said cylinder; d. a first one-way valve means in fluid communication with said crankcase and disposed so that external air is induced into said crankcase upon movement of said piston in one direction; e. an air reservoir in fluid communicaTion with said crankcase; f. a second one-way valve means disposed between said crankcase and said air reservoir so that air in said crankcase is forced into said reservoir upon movement of said piston in the reverse direction; and g. a passageway for pressurized air between said air reservoir and said inlet and exhaust passages.
Claim 3
Dependent Claim
36 words
The engine of claim 1 including a vessel for a fuel supply in fluid communication with said inlet passage and passageway between said air reservoir and said vessel whereby pressurized air pressurizes the fuel supply therein.
Claim 4
Dependent Claim
19 words
The engine of claim 1 including an oil reservoir adjacent said air reservoir and an air-oil separator means therebetween.
Claim 5
Dependent Claim
13 words
The engine of claim 1 wherein said valve means comprises reed-type check valves.
Claim 6
Dependent Claim
16 words
The engine of claim 1 including pressure regulating means controlling the pressure in said air reservoir.
Claim 7
Dependent Claim
35 words
The engine of claim 5 wherein said pressure regulating means bypasses pressurized air from said air reservoir to said exhaust passage when the air pressure in said air reservoir incipiently increases above a predetermined value.
Claim 8
Dependent Claim
25 words
The engine of claim 1 including override means on said air pressure regulator to drop the pressure to ambient conditions upon shutdown of said engine.
Claim 9
Dependent Claim
14 words
The engine of claim 7 wherein said override means comprises a solenoid-controlled dump valve.
Claim 10
Dependent Claim
20 words
The engine of claim 2 including one-way pressure relief valves in said exhaust passage and in said fuel supply vessel.
Claim 11
Dependent Claim
197 words
A supercharged internal combustion engine comprising in combination: a. a cylinder with inlet and exhaust passages; b. a fuel supply vessel in fluid communication with said inlet passage; c. a piston reciprocally disposed within said cylinder, said piston having a piston rod secured thereto; d. a crank assembly secured to said piston rod for translating reciprocating movement of the piston into rotary movement, said crank assembly being housed within a crankcase sealed pressurewise relative to said cylinder; e. a first one-way valve means in fluid communication with said crankcase and disposed so that external air is induced into said crankcase upon movement of said piston in one direction; f. air and oil reservoirs in fluid communication with said crankcase, the air and oil reservoirs being separated by air-oil separator means; g. a second one-way valve means disposed between said crankcase and said air reservoir so that air in said crankcase is forced into said air reservoir upon movement of said piston in the reverse direction; h. passageways for pressurized air between said air reservoir and said inlet and exhaust passages and said fuel supply vessel; and i. pressure regulating means controlling the pressure of the pressurized air.
Claim 12
Dependent Claim
197 words
A supercharged internal combustion engine comprising in combination: a. a cylinder with inlet and exhaust passages; b. a fuel supply vessel in fluid communication with said inlet passage; c. a piston reciprocally disposed within said cylinder, said piston having a piston rod secured thereto; d. a crank assembly secured to said piston rod for translating reciprocating movement of the piston into rotary movement, said crank assembly being housed within a crankcase sealed pressurewise relative to said cylinder; e. a first one-way valve means in fluid communication with said crankcase and disposed so that external air is induced into said crankcase upon movement of said piston in one direction; f. air and oil reservoirs in fluid communication with said crankcase, the air and oil reservoirs being separated by air-oil separator means; g. a second one-way valve means disposed between said crankcase and said air reservoir so that air in said crankcase is forced into said air reservoir upon movement of said piston in the reverse direction; h. passageways for pressurized air between said air reservoir and said inlet and exhaust passages and said fuel supply vessel; and i. pressure regulating means controlling the pressure of the pressurized air.
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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) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |