US3601109A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine fuel pump timing mechanism
Assignee: Caterpillar Inc
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Filing: 1969-06-25
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Granted: 1971-08-24
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Expires: 1989-06-25
Abstract
Abstract Timing mechanism for adjusting the angular disposition of an engine fuel pump cam shaft in response to changes in engine speed which comprises flyweight means to adjust the angular relationship of two rotating elements. In the present case, these elements are not coaxial with the fuel pump cam shaft, but one is connected thereto by a gear train to isolate the flyweight means from shock or impulse forces which are transferred through the cam shaft and to increase inertia without undue increase in mass and complexity.
Inventors
- 👤 James S Barton
- 👤 Robert B Bunting
- 👤 Richard A Dekeyser
- 👤 Marion R Joy
- 👤 Dennis M Ruttle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:40
CPC Classifications
F; F02; F02D; F02D1/00; F02D1/16; F02D1/162
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
242 words
In an engine having a fuel pump camshaft and a main engine camshaft in generally parallel relation, one to the other, a mechanism for automatically adjusting the angular disposition of an engine fuel pump camshaft with respect to the main engine camshaft comprising a first gear concentrically fixed to said fuel pump camshaft, a second gear in mesh with said first gear, means for rotatably mounting said second gear in concentric relation to said main engine camshaft, a third gear fixed to and in concentric relation with said main engine camshaft, and flyweight means responsive to engine speed located intermediate said second and third gears and mechanically linked therebetween for changing the angular disposition of said second gear with respect to said third gear and thereby the angular disposition of said main engine camshaft with respect to said engine fuel pump camshaft, said flyweight means comprising an opEning extending entirely through said second gear with a plurality of flyweights therein, said opening in said second gear defining a pair of parallel walls, said second gear defining a central axis, said plurality of flyweights comprising first and second flyweights disposed on either side of said central axis, said flyweights each having a slot therein disposed at an angle with respect to said pair of parallel walls, a sliding shoe disposed in each slot, and means extending through said third gear and directly connecting each of said sliding shoes to said main engine camshaft.
Claim 2
Dependent Claim
242 words
In an engine having a fuel pump camshaft and a main engine camshaft in generally parallel relation, one to the other, a mechanism for automatically adjusting the angular disposition of an engine fuel pump camshaft with respect to the main engine camshaft comprising a first gear concentrically fixed to said fuel pump camshaft, a second gear in mesh with said first gear, means for rotatably mounting said second gear in concentric relation to said main engine camshaft, a third gear fixed to and in concentric relation with said main engine camshaft, and flyweight means responsive to engine speed located intermediate said second and third gears and mechanically linked therebetween for changing the angular disposition of said second gear with respect to said third gear and thereby the angular disposition of said main engine camshaft with respect to said engine fuel pump camshaft, said flyweight means comprising an opEning extending entirely through said second gear with a plurality of flyweights therein, said opening in said second gear defining a pair of parallel walls, said second gear defining a central axis, said plurality of flyweights comprising first and second flyweights disposed on either side of said central axis, said flyweights each having a slot therein disposed at an angle with respect to said pair of parallel walls, a sliding shoe disposed in each slot, and means extending through said third gear and directly connecting each of said sliding shoes to said main engine camshaft.
Claim 3
Dependent Claim
40 words
The mechanism of claim 1 wherein said means connecting each of said sliding shoes to said main engine camshaft comprise a shank having one end fixed to a respective shoe and the other end fixed to said main engine camshaft.
Claim 4
Dependent Claim
30 words
The mechanism of claim 1 further including biasing means operably connected to said flyweights for normally holding said flyweights in abutting relationship when the main engine camshaft is not rotating.
Claim 5
Dependent Claim
24 words
The mechanism of claim 3 wherein the biasing means comprise a spring associated with each flyweight contained within said opening in said second gear.
Claim 6
Dependent Claim
15 words
The mechanism of claim 4 wherein said springs are disposed parallel to said parallel walls.
Claim 7
Dependent Claim
20 words
The mechanism of claim 1 wherein cover plates are fixed to the second gear so as to cover said flyweights.
Claim 8
Dependent Claim
72 words
The mechanism of claim 1 wherein said main engine camshaft and said fuel pump camshaft comprise generally elongated members disposed in parallel relation with each other, said first gear being fixed to an end of said fuel pump camshaft, said second gear being rotatably mounted on an end of said main engine camshaft, and said third gear being fixed to the same end of said main engine camshaft as said second gear.
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) | 1974-08-23 | 1975-02-22 | 1975-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-23 | 1979-02-22 | 1979-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-23 | 1983-02-22 | 1983-08-24 | $7700.00 | Window Closed / Lapsed |