US4173207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Canister
Assignee: Toyota Motor Corp
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Filing: 1978-03-22
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Granted: 1979-11-06
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Expires: 1998-03-22
Abstract
Abstract A canister comprising: a main body having a space therein; an adsorbent material contained in the space of said main body; an inlet pipe attached to said main body for connecting a carburetor float chamber with an upper portion of said space defined between said main body and said adsorbent material; an air suction pipe attached to said main body through which pipe the lower portion of said space defined between said canister and said adsorbent material communicates with the atmosphere; and valve means for selectively connecting said upper portion of said space with a fuel tank, thereby to prevent an evaporation gas from flowing from said fuel tank through said upper portion of said space into said carburetor float chamber.
Inventors
- 👤 Eiji Hiramatsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:19
CPC Classifications
F; F02; F02M; F02M25/00; F02M25/08; F02M25/0854
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
349 words
A canister for an internal combustion engine having a carburetor that includes a float chamber (3) and a purge port (17) positioned adjacent a throttle valve (5) and a fuel tank (12), said canister comprising: a hollow, main body (18) having a space therein; an adsorbent material (24) partially filling said space in said main body and defining upper and lower spaces (26 and 28, respectively) in combination with said main body; a first inlet pipe (31) attached to said main body (18) for permitting passage of fuel evaporation gases from the float chamber (3) of the carburetor (2) to said upper space (26); an air suction pipe (14) attached to said main body (18) whereby said lower space (28) communicates with the atmosphere through said suction pipe; and valve means (37, 41 and 36) separate from said first inlet pipe (31) for providing selected fluid communication between both the fuel tank (12) and said upper space as well as the purge port (17) and said upper space, said valve means comprising; a valve casing (29) positioned in said housing and having a tubular partition (30) extending downwardly therefrom into said adsorbent material (24); a first, positive pressure ball-type check valve (37) in said valve casing and in fluid communication with said upper space (26); a second inlet pipe (32) fluidly connecting the fuel tank (12) to said first check valve (37) and to said upper space (26); a second, negative pressure ball-type check valve (41) in said valve casing and in fluid communication with said upper space (26); said second inlet pipe (32) also providing fluid communication between said second check valve (41) and the fuel tank (12), said second check valve (41) acting only when the pressure in the fuel tank (12) is negative; a third ball-type check valve (36) in said valve casing and in fluid communication with said upper space (26); an outlet pipe (33) fluidly coupling the purge port (17) and said third check valve (36) for preventing the fuel evaporation gas from flowing back from the carburetor (2) into said upper space (26).
Claim 2
Dependent Claim
349 words
A canister for an internal combustion engine having a carburetor that includes a float chamber (3) and a purge port (17) positioned adjacent a throttle valve (5) and a fuel tank (12), said canister comprising: a hollow, main body (18) having a space therein; an adsorbent material (24) partially filling said space in said main body and defining upper and lower spaces (26 and 28, respectively) in combination with said main body; a first inlet pipe (31) attached to said main body (18) for permitting passage of fuel evaporation gases from the float chamber (3) of the carburetor (2) to said upper space (26); an air suction pipe (14) attached to said main body (18) whereby said lower space (28) communicates with the atmosphere through said suction pipe; and valve means (37, 41 and 36) separate from said first inlet pipe (31) for providing selected fluid communication between both the fuel tank (12) and said upper space as well as the purge port (17) and said upper space, said valve means comprising; a valve casing (29) positioned in said housing and having a tubular partition (30) extending downwardly therefrom into said adsorbent material (24); a first, positive pressure ball-type check valve (37) in said valve casing and in fluid communication with said upper space (26); a second inlet pipe (32) fluidly connecting the fuel tank (12) to said first check valve (37) and to said upper space (26); a second, negative pressure ball-type check valve (41) in said valve casing and in fluid communication with said upper space (26); said second inlet pipe (32) also providing fluid communication between said second check valve (41) and the fuel tank (12), said second check valve (41) acting only when the pressure in the fuel tank (12) is negative; a third ball-type check valve (36) in said valve casing and in fluid communication with said upper space (26); an outlet pipe (33) fluidly coupling the purge port (17) and said third check valve (36) for preventing the fuel evaporation gas from flowing back from the carburetor (2) into said upper space (26).
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) | 1982-11-05 | 1983-05-07 | 1983-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-05 | 1987-05-07 | 1987-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-05 | 1991-05-07 | 1991-11-06 | $7700.00 | Window Closed / Lapsed |