Patent US4013741A successfully refreshed from Google Patents.
US4013741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carburetor
Assignee: Lectron Products Inc
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Filing: 1975-05-30
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Granted: 1977-03-22
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Expires: 1995-05-30
Abstract
Abstract A carburetor of the slide and pin type having a throttle slide mounted in grooves on opposite sides of the throat and carrying a pin extending into a fuel discharge nozzle tube. The control edge of the slide has a concave recess which, together with the confronting surface of the carburetor throat defines the air passage surrounding the pin and concentrates the flow of air directly over and past the pin in such a way as to thoroughly atomize the fuel and distribute it uniformly in the airstream. Another feature of the invention is a choke arrangement comprising a longitudinal air passage bypassing the throttle slide and leading to a fuel choke valve and a cross passage into the downstream portion of the carburetor throat. The air flow through this passage will draw fuel up through the valve.
Inventors
- 👤 William H. Edmonston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:06
CPC Classifications
F; F02; F02M; F02M19/00; F02M19/04; F02M9/00; F02M9/02; F02M9/06; Y; Y10; Y10S; Y10S251/00; Y10S251/903
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
275 words
A carburetor comprising a body with inlet and outlet ends, a throat extending through said body from one end to the other, a throttle slide in said body extending transversely to the throat at an intermediate portion thereof, said slide being movable to vary the unblocked portion of said throat, said slide comprising a thin flat member of substantially rectangular shape having a central enlargement on the downstream face thereof, the slide being thin from said enlargement outwardly to its side edges, the height of said slide being only slightly greater than the height of said throat, said enlargement being in the path of said throat, the lower edge of said slide having a centrally disposed downwardly open concave recess, the bottom of said enlargement being spaced above the upper central portion of said concave recess, a fuel tube extending transversely to said throat and having an opening into said throat concentric with said recess, a pin disposed in said tube and having fuel metering means associated therewith at one side thereof downstream of said slide for regulating flow of fuel from said passage into the stream of air traversing said throat, one end of said pin extending into said tube, means mounting the other end of said pin in said enlargement so that the pin extends downwardly therefrom past said recess, the pin being centrally disposed with respect to the recess whereby the widest portion of said recess is aligned with said pin, the end of said fuel tube adjacent said throat being flush with the throat whereby air may pass through the entire space between said recess and said throat past said pin.
Claim 2
Dependent Claim
275 words
A carburetor comprising a body with inlet and outlet ends, a throat extending through said body from one end to the other, a throttle slide in said body extending transversely to the throat at an intermediate portion thereof, said slide being movable to vary the unblocked portion of said throat, said slide comprising a thin flat member of substantially rectangular shape having a central enlargement on the downstream face thereof, the slide being thin from said enlargement outwardly to its side edges, the height of said slide being only slightly greater than the height of said throat, said enlargement being in the path of said throat, the lower edge of said slide having a centrally disposed downwardly open concave recess, the bottom of said enlargement being spaced above the upper central portion of said concave recess, a fuel tube extending transversely to said throat and having an opening into said throat concentric with said recess, a pin disposed in said tube and having fuel metering means associated therewith at one side thereof downstream of said slide for regulating flow of fuel from said passage into the stream of air traversing said throat, one end of said pin extending into said tube, means mounting the other end of said pin in said enlargement so that the pin extends downwardly therefrom past said recess, the pin being centrally disposed with respect to the recess whereby the widest portion of said recess is aligned with said pin, the end of said fuel tube adjacent said throat being flush with the throat whereby air may pass through the entire space between said recess and said throat past said pin.
Claim 3
Dependent Claim
42 words
A carburetor according to claim 1, the downstream side of said pin being tapered, and means for longitudinally adjusting the position of said pin with respect to said slide, whereby the relationship of said taper to said concave recess may be varied.
Claim 4
Dependent Claim
44 words
A carburetor according to claim 1, further provided with guide means on opposite sides of said throat coacting with complementary guide means on said slide to support the slide during said movement, and a bottom groove in said throat receiving said slide control edge.
Claim 5
Dependent Claim
19 words
A carburetor according to claim 1, said concave recess having approximately the same radius of curvature as said throat.
Claim 6
Dependent Claim
40 words
The carburetor according to claim 1, said slide being of generally rectangular shape, said pin end mounting means comprising a threaded support for said pin within said enlargement, whereby the pin may be longitudinally adjusted with respect to the slide.
Claim 7
Dependent Claim
36 words
A carburetor according to claim 1, further provided with means urging said slide towards a closed position, and adjustable stop means for defining the relative positions of said concave recess and throat at said closed position.
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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) | 1980-03-21 | 1980-09-20 | 1981-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-21 | 1984-09-20 | 1985-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-21 | 1988-09-20 | 1989-03-22 | $7700.00 | Window Closed / Lapsed |