US3782355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recoil starter
Assignee: Von Weise USA Inc
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Filing: 1971-07-29
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Granted: 1974-01-01
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Expires: 1991-07-29
Abstract
Abstract A recoil starter construction for internal combustion engines particularly suitable for use with engines of the type used with snowmobiles and other recreational vehicles subject to heavy duty use. The starter employs a lightweight plastic rope pulley having a radially spaced shoulder within a rope receiving groove, and rope guide means defined within the groove insure the laying of the rope in the groove during recoiling in a predetermined manner which minimizes rope bind during cranking. The starter also utilizes a cam dog of a generally flat configuration having an outer periphery including dog-extending and dog-retaining surfaces, the cam dog positively retaining the engine clutch engaging dogs against operative contact with the flywheel components when the starter has recoiled and rewound the starter rope.
Inventors
- 👤 L Hamman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:53
CPC Classifications
F; F02; F02N; F02N3/00; F02N3/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
354 words
A recoil starter for internal combustion engines having a flywheel and axis of rotation and an annular clutch member coaxially mounted upon the flywheel comprising, in combination, a housing adapted to be mounted upon the engine, a rope pulley shaft mounted upon said housing coaxial with the engine flywheel axis of rotation, a rope pulley rotatably mounted upon said shaft, a recoil spring disposed about said shaft having a first end connected to said housing and a second end connected to said pulley, said rope pulley having a rope receiving groove defined therein, a rope received within said groove having a first end connected to said pulley and a second end, a handle mounted on said rope second end exteriorly accessible with respect to said housing, a dog pivotally mounted on said pulley for oscillation about a pivot axis radially spaced from said flywheel axis of rotation located within said clutch member and including a clutch member engageable surface extending forward of said pivot axis and an abutment retaining surface extending rearwardly of said pivot axis with respect to the direction of pulley rotation during engine cranking, a dog cam of generally flat configuration formed of plate material rotatably mounted on said shaft and coaxial therewith and locateD intermediate said dog and dog pivot and said axis of rotation, brake means engaging said dog cam frictionally retarding rotation of said dog cam on said shaft, a dog extending surface defined on said dog cam disposed ahead of said dog clutch member engageable surface with respect to the direction of pulley rotation during engine cranking engaged by said dog during cranking rotation of said pulley and pivoting said dog to extend said dog clutch member engageable surface radially outward from said axis of rotation for engagement with the engine clutch member to rotate the engine flywheel, and a dog retainer surface defined on said dog cam disposed behind said dog pivot axis with respect to the direction of pulley rotation during engine cranking engageable with said dog abutment retaining surface to selectively hold said clutch member engageable surface radially inward of the engine cluch member.
Claim 2
Dependent Claim
354 words
A recoil starter for internal combustion engines having a flywheel and axis of rotation and an annular clutch member coaxially mounted upon the flywheel comprising, in combination, a housing adapted to be mounted upon the engine, a rope pulley shaft mounted upon said housing coaxial with the engine flywheel axis of rotation, a rope pulley rotatably mounted upon said shaft, a recoil spring disposed about said shaft having a first end connected to said housing and a second end connected to said pulley, said rope pulley having a rope receiving groove defined therein, a rope received within said groove having a first end connected to said pulley and a second end, a handle mounted on said rope second end exteriorly accessible with respect to said housing, a dog pivotally mounted on said pulley for oscillation about a pivot axis radially spaced from said flywheel axis of rotation located within said clutch member and including a clutch member engageable surface extending forward of said pivot axis and an abutment retaining surface extending rearwardly of said pivot axis with respect to the direction of pulley rotation during engine cranking, a dog cam of generally flat configuration formed of plate material rotatably mounted on said shaft and coaxial therewith and locateD intermediate said dog and dog pivot and said axis of rotation, brake means engaging said dog cam frictionally retarding rotation of said dog cam on said shaft, a dog extending surface defined on said dog cam disposed ahead of said dog clutch member engageable surface with respect to the direction of pulley rotation during engine cranking engaged by said dog during cranking rotation of said pulley and pivoting said dog to extend said dog clutch member engageable surface radially outward from said axis of rotation for engagement with the engine clutch member to rotate the engine flywheel, and a dog retainer surface defined on said dog cam disposed behind said dog pivot axis with respect to the direction of pulley rotation during engine cranking engageable with said dog abutment retaining surface to selectively hold said clutch member engageable surface radially inward of the engine cluch member.
Claim 3
Dependent Claim
106 words
In a recoil starter as in claim 1 wherein said dog cam includes a radially extending arm, said dog extending surface being defined on said arm, said dog retainer surface being defined on said arm behind the dog pivot axis with respect to the direction of pulley rotation during engine cranking, said dog abutment retaining surface defined on said dog being engageable with said retainer surface upon recoiling of said rope upon said pulley, said engagement of said abutment retaining surface and said retainer surface preventing pivoting of said dog in the direction disposing said dog clutch member engageable surface radially outward toward the clutch member.
Claim 4
Dependent Claim
32 words
In a recoil starter as in claim 2 wherein said dog abutment comprises retaining surface a surface defined on said dog substantially radially disposed with respect to the associated dog pivot axis.
Claim 5
Dependent Claim
35 words
In a recoil starter as in claim 2 wherein said dog extending surface and said dog retainer surface constitute edge surfaces of said dog cam at least partially defining the periphery of said dog cam.
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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) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |