US4351300A
Expired / Lapsed
US
⏱️ 0.0 years remaining
LP Gas carburetor
Assignee: Individual
•
Filing: 1980-02-06
•
Granted: 1982-09-28
•
Expires: 2000-02-06
Abstract
Abstract An LP gas carburetor adapted for use as the only carburetor for an engine or, alternatively, for use in conjunction with an existing gasoline carburetor (in particular, a two barrel carburetor) on an engine, the LP gas carburetor comprising a body adapted to be mounted on the engine, the body having two main passages and one auxiliary passage extending therethrough for the flow of an air-fuel mixture through the LP gas carburetor, a main inlet port in communication with the main passages for the flow of LP gas to the main passages, and an auxiliary inlet port in communication with the auxiliary passage for the flow of LP gas to the auxiliary passage. A main valve is provided for controlling the flow of LP gas from a source thereof through the main inlet port to the main passages, and an auxiliary valve is provided for controlling the flow of LP gas from the source through the auxiliary inlet port to the auxiliary passage for the idling of the engine. An LP gas carburetor adapted for use as the only carburetor for an engine or in conjunction with an existing single-barrel gasoline carburetor, and an LP gas carburetor adapted for use as the only carburetor for an engine or in conjunction with an existing four-barrel gasoline carburetor are also disclosed.
Inventors
- 👤 Richard H. Selvidge
- 👤 Dewey Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:30
CPC Classifications
F; F02; F02M; F02M13/00; F02M13/08; F02M21/00; F02M21/02; F02M21/0218; F02M21/023; F02M21/0239; F02M21/04; F02M21/042; F02B; F02B43/00; F02D; F02D19/00; F02D19/06; F02D19/066; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/30
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
124 words
An LP gas carburetor comprising: a body adapted to be mounted on an engine, the body having a passage therethrough for flow of an air-fuel mixture through the carburetor, and a main and an auxiliary inlet port in communication with the passage for the flow of LP gas to the passage; a tube projecting into and terminating within the passage, the axial passage in the tube being in communication with the auxiliary inlet port; a main valve for controlling the flow of LP gas from a source thereof through the main inlet port to the passage; and an auxiliary valve for controlling the flow of LP gas from the source through the auxiliary inlet port to the passage for the idling of the engine.
Claim 2
Dependent Claim
124 words
An LP gas carburetor comprising: a body adapted to be mounted on an engine, the body having a passage therethrough for flow of an air-fuel mixture through the carburetor, and a main and an auxiliary inlet port in communication with the passage for the flow of LP gas to the passage; a tube projecting into and terminating within the passage, the axial passage in the tube being in communication with the auxiliary inlet port; a main valve for controlling the flow of LP gas from a source thereof through the main inlet port to the passage; and an auxiliary valve for controlling the flow of LP gas from the source through the auxiliary inlet port to the passage for the idling of the engine.
Claim 3
Dependent Claim
24 words
An LP gas carburetor as set forth in claim 1 wherein the tube terminates generally centrally with respect to the passage in the body.
Claim 4
Dependent Claim
38 words
An LP gas carburetor as set forth in claim 1 further comprising metering means in the passage in the body for metering and distributing LP gas from the main inlet port to the air flowing through said passage.
Claim 5
Dependent Claim
87 words
An LP gas carburetor as set forth in claim 1 wherein the carburetor is adapted to be mounted between an existing carburetor for the engine and the engine, and wherein the LP gas carburetor further comprises valve means in communication with the main and auxiliary valves and with a source of LP gas, the valve means unblocking flow of LP gas to the LP carburetor when the LP gas carburetor is in use and blocking flow of LP gas thereto when the gasoline carburetor is in use.
Claim 6
Dependent Claim
53 words
An LP gas carburetor as set forth in claim 4 wherein the valve means is in communication with a source of air, the valve means unblocking air flow to the LP gas carburetor when the gasoline carburetor is in use and blocking air flow thereto when the LP gas carburetor is in use.
Claim 7
Dependent Claim
153 words
An LP gas carburetor comprising: a body adapted to be mounted on an engine, the body having two main passages and an auxiliary passage extending therethrough for the flow of an air-fuel mixture through the carburetor, a main inlet port in communication with the main passages for the flow of LP gas to the main passages, and an auxiliary inlet port in communication with the auxiliary passage for the flow of LP gas to the auxiliary passage; a main valve for controlling the flow of LP gas from a source thereof through the main inlet port to the main passages; an auxiliary valve for controlling the flow of LP gas from the source through the auxiliary inlet port to the auxiliary passage for the idling of the engine; and a tube projecting into and terminating within the auxiliary passage, the axial passage of the tube being in communication with the auxiliary inlet port.
Claim 8
Dependent Claim
153 words
An LP gas carburetor comprising: a body adapted to be mounted on an engine, the body having two main passages and an auxiliary passage extending therethrough for the flow of an air-fuel mixture through the carburetor, a main inlet port in communication with the main passages for the flow of LP gas to the main passages, and an auxiliary inlet port in communication with the auxiliary passage for the flow of LP gas to the auxiliary passage; a main valve for controlling the flow of LP gas from a source thereof through the main inlet port to the main passages; an auxiliary valve for controlling the flow of LP gas from the source through the auxiliary inlet port to the auxiliary passage for the idling of the engine; and a tube projecting into and terminating within the auxiliary passage, the axial passage of the tube being in communication with the auxiliary inlet port.
Claim 9
Dependent Claim
20 words
An LP gas carburetor as set forth in claim 1 wherein the auxiliary passage is between the two main passages.
Claim 10
Dependent Claim
44 words
An LP gas carburetor as set forth in claim 7 wherein the auxiliary passage is defined by two opposed side walls relieved to form opposed shoulders, the shoulders creating turbulence for improved mixing of the air and LP gas flowing through the auxiliary passage.
Claim 11
Dependent Claim
33 words
An LP gas carburetor as set forth in claim 8 wherein the said tube extends within the auxiliary passage at a level above the shoulders and terminates in an end between the shoulders.
Claim 12
Dependent Claim
26 words
An LP gas carburetor as set forth in claim 8 wherein the cross-sectional area of the main passages is greater than that of the auxiliary passage.
Claim 13
Dependent Claim
24 words
An LP carburetor as set forth in claim 1 having a recess in communication with both the main passages and the main inlet port.
Claim 14
Dependent Claim
36 words
An LP gas carburetor as set forth in claim 1 further comprising metering means in the main passages for metering and distributing LP gas from the main inlet port to air flowing through the main passages.
Claim 15
Dependent Claim
65 words
An LP gas carburetor as set forth in claim 1 further comprising a valve member secured to the body having a main bore and an auxiliary bore, the main valve comprising a movable valve member for blocking and unblocking flow of LP gas through the main bore and the auxiliary valve comprising a needle valve for controlling flow of LP gas through the auxiliary bore.
Claim 16
Dependent Claim
43 words
An LP gas carburetor as set forth in claim 1 wherein the body further has two secondary passages extending therethrough spaced from the main passages, the main inlet port being in communication with the secondary passages for the flow of LP gas thereto.
Claim 17
Dependent Claim
36 words
An LP gas carburetor as set forth in claim 10 further comprising two tubes each extending into one of the secondary passages, the axial passage of each tube being in communication with the main inlet port.
Claim 18
Dependent Claim
71 words
An LP gas carburetor as set forth in claim 1 further comprising a housing secured to the body at the side thereof away from the engine for controlling the flow of air through the main passages, and wherein the body has a plurality of holes adapted to receive bolts for mounting the carburetor on the engine, the holes being so located as to receive bolts for engines having different bolt patterns.
Claim 19
Dependent Claim
69 words
An LP gas carburetor as set forth in claim 1 wherein the carburetor is adapted to be mounted between an existing gasoline carburetor for an engine and the engine, and wherein the body has a plurality of holes adapted to receive bolts for mounting the body between the engine and the existing gasoline carburetor, the holes being so located as to receive bolts for engines having different bolt patterns.
Claim 20
Dependent Claim
88 words
An LP gas carburetor as set forth in claim 1 wherein the carburetor is adapted to be mounted between an existing gasoline carburetor for the engine and the engine, and wherein the LP gas carburetor further comprises valve means in communication with the main and auxiliary valves and with a source of LP gas, the valve means unblocking flow of LP gas to the LP carburetor when the LP gas carburetor is in use and blocking flow of LP gas thereto when the gasoline carburetor is in use.
Claim 21
Dependent Claim
54 words
An LP gas carburetor as set forth in claim 18 wherein the valve means is also in communication with a source of air, the valve means unblocking air flow to the LP gas carburetor when the gasoline carburetor is in use and blocking air flow thereto when the LP gas carburetor is in use.
Claim 22
Dependent Claim
45 words
An LP gas carburetor as set forth in claim 18 wherein said body has a recess in communication with both main passages and the main inlet port, the recess being adapted to receive gasoline from the gasoline carburetor when the gasoline carburetor is in use.
References Cited (Backward Citations)
US2155763A
Cited
US2319971A
Cited
US2340954A
Cited
US2606108A
Cited
US3494341A
Cited
US3977374A
Cited
US3843338A
Cited
CA993291A
Cited
US4264535A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-09-27 | 1986-03-29 | 1986-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-27 | 1990-03-29 | 1990-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-27 | 1994-03-29 | 1994-09-28 | $7700.00 | Window Closed / Lapsed |