Patent US3883270A successfully refreshed from Google Patents.
US3883270A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel pump
Assignee: Stanadyne LLC
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Filing: 1974-03-22
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Granted: 1975-05-13
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Expires: 1994-03-22
Abstract
Abstract The ends of rollers interposed between a cylindrical cam ring and the radial pump plungers of a rotary distributor pump engage a pair of conical rings which move axially toward each other to adjust the outward movement of the plungers and mechanically regulate the amount of fuel injected per pumping stroke.
Inventors
- 👤 Leonard N Baxter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:27
CPC Classifications
F; F02; F02M; F02M41/00; F02M41/08; F02M41/14; F02M41/1405; F02M41/1411; F04; F04B; F04B1/00; F04B1/04; F04B1/06; F04B49/00; F04B49/12; Y; Y02; Y02P; Y02P80/00; Y02P80/10
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
192 words
In a fuel pump for an internal combustion engine with a housing having inlet and outlet passages, a fuel distributing rotor journaled in a bore in the housing and having an inlet port and an outlet port which communicate alternately with said inlet and outlet passages during the rotation of said rotor to permit alternate admission and discharge of fuel, plungers slidably mounted in radial passages of said rotor to sequentially pressurize charges of fuel for delivery through said outlet passages, a cam ring surrounding said rotor in the plane of revolution of said plungers and having an inwardly directed contour formed by cam lobes, roller shoes engagable with the ends of said plungers mounting rollers which act as cam followers for translating the cam contour into reciprocable movement of the plungers, and positive mechanical means for regulating the quantity of fuel to be injected per pumping stroke, the improvement wherein said regulating means comprises a pair of cone rings having generally conical inner surfaces engagable with each end of the rollers and means for moving said cone rings axially relatively to each other for adjusting the outward movement of the rollers.
Claim 2
Dependent Claim
192 words
In a fuel pump for an internal combustion engine with a housing having inlet and outlet passages, a fuel distributing rotor journaled in a bore in the housing and having an inlet port and an outlet port which communicate alternately with said inlet and outlet passages during the rotation of said rotor to permit alternate admission and discharge of fuel, plungers slidably mounted in radial passages of said rotor to sequentially pressurize charges of fuel for delivery through said outlet passages, a cam ring surrounding said rotor in the plane of revolution of said plungers and having an inwardly directed contour formed by cam lobes, roller shoes engagable with the ends of said plungers mounting rollers which act as cam followers for translating the cam contour into reciprocable movement of the plungers, and positive mechanical means for regulating the quantity of fuel to be injected per pumping stroke, the improvement wherein said regulating means comprises a pair of cone rings having generally conical inner surfaces engagable with each end of the rollers and means for moving said cone rings axially relatively to each other for adjusting the outward movement of the rollers.
Claim 3
Dependent Claim
47 words
The device recited in claim 1 wherein one of said cone rings is provided with axially facing inclined surfaces and the pump includes axially fixed abutments engagable with said inclined surfaces whereby rotation of such cone ring moves the ring axially relative to the other cone ring.
Claim 4
Dependent Claim
31 words
The device of claim 2 wherein a hydraulically actuated piston is connected to said cone ring for controlling the rotational position thereof in correlation with an operating condition of the engine.
Claim 5
Dependent Claim
21 words
The device of claim 2 wherein said abutments comprise a plurality of buttons rotatably mounted in axial recesses of the housing.
Claim 6
Dependent Claim
21 words
The device of claim 4 wherein said buttons are provided with generally cylindrical reaction surfaces for engaging with said inclined surfaces.
Claim 7
Dependent Claim
26 words
The device of claim 1 wherein the ends of said rollers engagable with said cone rings are generally conical and have a finite radius of curvature.
Claim 8
Dependent Claim
17 words
The device of claim 1 wherein said rollers extend axially beyond the ends of said roller shoes.
Claim 9
Dependent Claim
32 words
The device of claim 1 wherein guide members fixed to said rotor are engagable with said shoes to maintain the axis of the rollers parallel to the axis of the distributing rotor.
Claim 10
Dependent Claim
22 words
The device of claim 8 wherein said roller shoes provide a generally radial groove for closely and slidably receiving said guide members.
Claim 11
Dependent Claim
30 words
The device of claim 9 wherein the rotor is provided with radially extending peripheral slots and said guide members comprise generally trapezoidal plates fixed therein in alignment with the grooves.
Claim 12
Dependent Claim
50 words
The device of claim 1 wherein the trailing surfaces of the cam lobes has a more gentle slope than the leading surfaces thereof and the trailing surfaces limit the velocity of movement of the rollers radially outwardly thereby to minimize the impact loading between the rollers and said cone rings.
References Cited (Backward Citations)
US3338168A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |