US4224919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal-combustion engine arrangement with improved carburetor mounting
Assignee: ZF Friedrichshafen AG
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Filing: 1978-11-02
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Granted: 1980-09-30
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Expires: 1998-11-02
Abstract
Abstract The carburetor of a motorcycle engine is fastened to an engine cylinder by a thin resilient hose connecting the fuel mixture outlet port of the carburetor to the intake port of the cylinder. The carburetor is fastened to the casing of the associated air cleaner much more rigidly than it is fastened to the cylinder. The fastening connection between the carburetor and the air cleaner casing is provided by a tubular member having a wider orifice fastened to said casing, a narrower orifice fastened to the carburetor, and a shoulder portion connecting the orifices and of greater wall thickness near the float chamber in the carburetor than elsewhere.
Inventors
- 👤 Hermann Appelbaum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:24
CPC Classifications
F; F02; F02M; F02M35/00; F02M35/10; F02M35/10006; F02M35/10078; F02B; F02B61/00; F02B61/02; F02M19/00; F02M35/1015; F02M35/10183; F02M35/16; F02M35/162; F02B61/06; F02M35/10242; F02M35/10295; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
221 words
An internal-combustion arrangement comprising: (a) a support; (b) a cylinder mounted on said support and having an extended intake port for fuel mixture; (c) an air cleaner casing mounted on said support; (d) a carburetor having an air-inlet port and an extended fuel-mixture outlet port, said carburetor including a float chamber, said fuel-mixture outlet port being closely spaced from and in general alignment with said intake port so that a narrow annular gap having a length less than either of said outlet port or intake port exists between said outlet port and intake port; (e) first fastening means fastening said carburetor to said cylinder and including a thin, resilient hose connecting said outlet port to said intake port, said hose bridging the narrow annular gap between said outlet port and intake port and the dimensional relationship of said hose, outlet port, intake port and annular gap being such that said hose does not enter into the annular gap during engine operation; and (f) second fastening means fastening said carburetor to said air cleaner casing more rigidly than said carburetor is fastened to said cylinder by said first fastening means whereby said carburetor is mounted on said cylinder and air cleaner casing so that it does not oscillate at an amplitude sufficient to cause frothing of liquid fuel in said flow chamber.
Claim 2
Dependent Claim
221 words
An internal-combustion arrangement comprising: (a) a support; (b) a cylinder mounted on said support and having an extended intake port for fuel mixture; (c) an air cleaner casing mounted on said support; (d) a carburetor having an air-inlet port and an extended fuel-mixture outlet port, said carburetor including a float chamber, said fuel-mixture outlet port being closely spaced from and in general alignment with said intake port so that a narrow annular gap having a length less than either of said outlet port or intake port exists between said outlet port and intake port; (e) first fastening means fastening said carburetor to said cylinder and including a thin, resilient hose connecting said outlet port to said intake port, said hose bridging the narrow annular gap between said outlet port and intake port and the dimensional relationship of said hose, outlet port, intake port and annular gap being such that said hose does not enter into the annular gap during engine operation; and (f) second fastening means fastening said carburetor to said air cleaner casing more rigidly than said carburetor is fastened to said cylinder by said first fastening means whereby said carburetor is mounted on said cylinder and air cleaner casing so that it does not oscillate at an amplitude sufficient to cause frothing of liquid fuel in said flow chamber.
Claim 3
Dependent Claim
27 words
An arrangement as set forth in claim 1, wherein said first and second fastening means constitute the sole significant, stress-transmitting connections between said carburetor and said support.
Claim 4
Dependent Claim
17 words
An arrangement as set forth in claim 2, wherein said support is the frame of a motorcycle.
Claim 5
Dependent Claim
50 words
An arrangement as set forth in claim 1, wherein the internal cross section of said hose in the relaxed condition is not significantly smaller than the external cross sections of respective tubular parts of said outlet port and of said intake port, said tubular parts being received in said hose.
Claim 6
Dependent Claim
23 words
An arrangement as set forth in claim 4, further comprising two hose clamps fastening respective portions of said hose to said tubular parts.
Claim 7
Dependent Claim
41 words
An arrangement as set forth in claim 5, wherein said first fastening means further include a bellows-shaped, tubular member enveloping said hose, respective parts of said bellows-shaped member being interposed between said hose and said hose clamps for protecting said hose.
Claim 8
Dependent Claim
145 words
An arrangement as set forth in claim 1, 2 or 4, wherein said second fastening means include a tubular member of resilient material formed with a bore therethrough for the flow of air from said casing to said carburetor, said tubular member having a first orifice portion connected to said air-inlet port, a second orifice portion attached to said air cleaner casing, the portion of said bore is said second orifice portion having a greater flow section than the portion of said bore in said first orifice portion and communicating with the interior of said air cleaner casing, and an annular shoulder portion connecting said orifice portions, respective circumferential parts of said shoulder portion being adjacent to and remote from said float chamber, the wall thickness of said shoulder portion in said adjacent part being greater than the wall thickness thereof in said remote part.
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) | 1983-09-30 | 1984-03-31 | 1984-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-30 | 1988-03-31 | 1988-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-30 | 1992-03-31 | 1992-09-30 | $7700.00 | Window Closed / Lapsed |