Patent US3871350A successfully refreshed from Google Patents.
US3871350A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recoil starter
Assignee: Von Weise USA Inc
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Filing: 1973-08-02
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Granted: 1975-03-18
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Expires: 1993-08-02
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
- 👤 Lyle J Hamman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:50
CPC Classifications
F; F02; F02N; F02N3/00; F02N3/02; Y; Y10; Y10T; Y10T74/00; Y10T74/13
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
334 words
A recoil starter for internal combustion engines comprising, in combination, a housing, pulley bearing means mounted upon said housing, a starter rope pulley rotatably mounted on said bearing means, said pulley having a starter rope receiving groove defined therein, said groove being defined by first and second radially extending sides and a base surface, recoil spring means operatively interposed between said housing and said pulley adapted to rotate said pulley in a rope recoiling direction, an opening defined in said pulley intersecting said groove adjacent said base surface, a starter rope adapted to be coiled in said pulley groove having an inner end inserted through said opening and attached to said pulley and an outer end, said groove having an axial width as defined by said first and second sides substantially twice the diameter of said starter rope, an annular shoulder defined in said groove adjacent one of said sides and radially spaced outwardly from said base surface and of an axial width substantially corresponding to the rope diameter, the difference in radii between said shoulder and said base surface being less than the diameter of said rope, whereby the first coil of rope rewound on said pulley, the pulley side adjacent said shoulder and said shoulder define an annular recess for receiving the second coil of rope wound on said pulley, a rope bushing mounted in said housing having a guide bore, a hAndle affixed to said rope outer end exteriorly located with respect to said housing, clutch means mounted on said pulley selectively engageable with engine drive means, and rope guiding means defined on said groove base surface adjacent said opening and ahead of said opening with respect to the rotation of said pulley in a rope recoiling direction deflecting the rope during recoiling away from said opening and rope inner end extending therein into said annular recess to prevent the second coil of rope received within said groove during recoiling from laying upon the first rope coil recoiled in said groove.
Claim 2
Dependent Claim
334 words
A recoil starter for internal combustion engines comprising, in combination, a housing, pulley bearing means mounted upon said housing, a starter rope pulley rotatably mounted on said bearing means, said pulley having a starter rope receiving groove defined therein, said groove being defined by first and second radially extending sides and a base surface, recoil spring means operatively interposed between said housing and said pulley adapted to rotate said pulley in a rope recoiling direction, an opening defined in said pulley intersecting said groove adjacent said base surface, a starter rope adapted to be coiled in said pulley groove having an inner end inserted through said opening and attached to said pulley and an outer end, said groove having an axial width as defined by said first and second sides substantially twice the diameter of said starter rope, an annular shoulder defined in said groove adjacent one of said sides and radially spaced outwardly from said base surface and of an axial width substantially corresponding to the rope diameter, the difference in radii between said shoulder and said base surface being less than the diameter of said rope, whereby the first coil of rope rewound on said pulley, the pulley side adjacent said shoulder and said shoulder define an annular recess for receiving the second coil of rope wound on said pulley, a rope bushing mounted in said housing having a guide bore, a hAndle affixed to said rope outer end exteriorly located with respect to said housing, clutch means mounted on said pulley selectively engageable with engine drive means, and rope guiding means defined on said groove base surface adjacent said opening and ahead of said opening with respect to the rotation of said pulley in a rope recoiling direction deflecting the rope during recoiling away from said opening and rope inner end extending therein into said annular recess to prevent the second coil of rope received within said groove during recoiling from laying upon the first rope coil recoiled in said groove.
Claim 3
Dependent Claim
33 words
In a starter as in claim 1 wherein said rope guiding means comprises an elongated depression defined in said groove base surface of a width substantially corresponding to the diameter of said rope.
Claim 4
Dependent Claim
32 words
In a starter as in claim 2 wherein said depression extends obliquely across said base surface from said first groove defining radially extending side to said second groove defining radially extending side.
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) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |