Patent US3640253A successfully refreshed from Google Patents.
US3640253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carburetor throttle control assembly
Assignee: Victa Ltd
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Filing: 1970-05-01
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Granted: 1972-02-08
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Expires: 1990-05-01
Abstract
Abstract A single-ended control arrangement for the butterfly spindle in a carburetor, in which a speed governor shaft is geared to one end of the spindle while the other end is sealed off, and an accelerator element is connected through a spring to the shaft to influence together with a governor vane the rotation of the shaft.
Inventors
- 👤 Peter David Glover
- 👤 Richard Forshaw
- 👤 William Henry Steele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:08
CPC Classifications
F; F02; F02D; F02D9/00; F02D9/02; F02D2009/0201; F02D2009/0216; F02D2700/00; F02D2700/02; F02D2700/0217; F02D2700/0225; F02D2700/0228; F02D2700/023; F02D2700/0238
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
131 words
In an internal combustion engine having provision for a cooling air stream, a carburetor comprising a housing, an induction throat within the housing, a butterfly valve within the throat, a spindle rotatably supported in a bore in the housing and extending across the throat and carrying said valve, means for closing one end of the bore against the ingress of dust to a first end of the spindle, a control shaft geared to a second end of the spindle, a governor vane fixed on the shaft for angular deflection by the engine-coolinG airstream, a manually controlled accellerator element rotatable about the shaft, and resilient means interconnecting the accelerator element and the shaft to permit rotation of the shaft under influence of the governor vane independent from rotation of the accelerator element.
Claim 2
Dependent Claim
131 words
In an internal combustion engine having provision for a cooling air stream, a carburetor comprising a housing, an induction throat within the housing, a butterfly valve within the throat, a spindle rotatably supported in a bore in the housing and extending across the throat and carrying said valve, means for closing one end of the bore against the ingress of dust to a first end of the spindle, a control shaft geared to a second end of the spindle, a governor vane fixed on the shaft for angular deflection by the engine-coolinG airstream, a manually controlled accellerator element rotatable about the shaft, and resilient means interconnecting the accelerator element and the shaft to permit rotation of the shaft under influence of the governor vane independent from rotation of the accelerator element.
Claim 3
Dependent Claim
30 words
In an internal combustion engine as claimed in claim 1, wherein the gearing between said control shaft and said spindle is enclosed within a compartment sealed by a removable cover.
Claim 4
Dependent Claim
34 words
In an internal combustion engine as claimed in claim 1, wherein said housing includes an extension above the gearing between said control shaft and said spindle, and said control shaft is rotatably mounted therein.
Claim 5
Dependent Claim
64 words
In an internal combustion engine as claimed in claim 1, wherein a control arm is provided on said accelerator element and carries a housing, electrical switch means mounted in said last-named housing, and a control cable is attached through said switch means to said control arm, said switch means being connected with the electrical system of the engine to stop the engine when operated.
Claim 6
Dependent Claim
81 words
In an internal combustion engine as claimed in claim 4, wherein said electrical switch means is a pair of contacts separated from each other by spring action, and an end of said cable connects to said control arm through one of said contacts so that a drawing force applied to said cable serves to move said control arm to close said butterfly valve and upon further application of a drawing force to said cable closes said contacts against said spring action.
References Cited (Backward Citations)
US2935977A
Cited
US2964028A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |