US3570464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Starter mechanism
Assignee: Textron Inc
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Filing: 1969-05-06
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Granted: 1971-03-16
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Expires: 1989-05-06
Abstract
Abstract A rewind starter for an internal combustion engine having a combined flywheel and fan on one end of the crankshaft comprises a cup coaxial with the crankshaft rotatably supported in a bearing provided in a starter housing having a ring of openings to admit air to the flywheel. Pawls on the flywheel are releasably engageable with shoulders on the cup to couple the cup with the crankshaft. A starter pulley fixed on the outer end of the cup is received in a recess in the starter housing closed by a dished cover holding a rewind spring having its outer end secured to the cover and its inner end secured to an arbor rotatable with the cup and pulley.
Inventors
- 👤 Vincent D Morabit
- 👤 Robert D Olmstead
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:36
CPC Classifications
F; F02; F02N; F02N3/00; F02N3/02
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
226 words
In a rewind starter assembly for an internal combustion engine having a shaft and a wheel on said shaft, the combination of a starter housing having an outwardly facing recess with a bottom and an outwardly extending rim and an annular bearing extending inwardly from and supported by the bottom of said recess in axial alignment with the engine shaft, a starter cup rotatably supported in said bearing and having an integral skirt portion extending inwardly of said bearing toward said shaft and wheel and a shank portion extending into said recess, the inwardly extending skirt portion of said cup having at least one shoulder means, at least one pawl pivotally mounted on said wheel and engageable with said shoulder means of the skirt portion of said cup to cause said cup, wheel and shaft to rotate together, said pawl being spring biased to a position to engage said shoulder means and being movable by centrifugal force to a nonengaging position when said wheel rotates at or above engine idling speed, a starter pulley in said recess and fixed on the shank portion of said cup to rotate with said cup, a wound rope on said pulley for rotating said pulley and cup in one direction, and spring means for rotating said cup and pulley in the opposite direction to rewind said rope on said pulley.
Claim 2
Dependent Claim
226 words
In a rewind starter assembly for an internal combustion engine having a shaft and a wheel on said shaft, the combination of a starter housing having an outwardly facing recess with a bottom and an outwardly extending rim and an annular bearing extending inwardly from and supported by the bottom of said recess in axial alignment with the engine shaft, a starter cup rotatably supported in said bearing and having an integral skirt portion extending inwardly of said bearing toward said shaft and wheel and a shank portion extending into said recess, the inwardly extending skirt portion of said cup having at least one shoulder means, at least one pawl pivotally mounted on said wheel and engageable with said shoulder means of the skirt portion of said cup to cause said cup, wheel and shaft to rotate together, said pawl being spring biased to a position to engage said shoulder means and being movable by centrifugal force to a nonengaging position when said wheel rotates at or above engine idling speed, a starter pulley in said recess and fixed on the shank portion of said cup to rotate with said cup, a wound rope on said pulley for rotating said pulley and cup in one direction, and spring means for rotating said cup and pulley in the opposite direction to rewind said rope on said pulley.
Claim 3
Dependent Claim
219 words
A rewind starter assembly for an internal combustion engine having a shaft and a wheel on said shaft, the combination of a starter housing having an outwardly facing recess and an annular bearing extending inwardly from said recess in axial alignment with the engine shaft, a starter cup rotatably supported in said bearing and having a skirt portion extending toward said shaft and wheel and a shank portion extending into said recess, the skirt portion of said cup having at least one shoulder means, at least one pawl on said wheel engageable with said shoulder means of the skirt portion of said cup to cause said cup, wheel and shaft to rotate together, a starter pulley in said recess and fixed on the shank portion of said cup to rotate with said cup, a wound rope on said pulley for rotating said pulley and cup in one direction, and spring means for rotating said cup and pulley in the opposite direction to rewind said rope on said pulley, said spring means comprising a dished cover for said recess of the starter housing, a spiral spring received in said cover and having an outer end secured to the cover, and an arbor coaxial with and rotatable with said cup, the inner end of said spring being secured to said arbor.
Claim 4
Dependent Claim
219 words
A rewind starter assembly for an internal combustion engine having a shaft and a wheel on said shaft, the combination of a starter housing having an outwardly facing recess and an annular bearing extending inwardly from said recess in axial alignment with the engine shaft, a starter cup rotatably supported in said bearing and having a skirt portion extending toward said shaft and wheel and a shank portion extending into said recess, the skirt portion of said cup having at least one shoulder means, at least one pawl on said wheel engageable with said shoulder means of the skirt portion of said cup to cause said cup, wheel and shaft to rotate together, a starter pulley in said recess and fixed on the shank portion of said cup to rotate with said cup, a wound rope on said pulley for rotating said pulley and cup in one direction, and spring means for rotating said cup and pulley in the opposite direction to rewind said rope on said pulley, said spring means comprising a dished cover for said recess of the starter housing, a spiral spring received in said cover and having an outer end secured to the cover, and an arbor coaxial with and rotatable with said cup, the inner end of said spring being secured to said arbor.
Claim 5
Dependent Claim
35 words
A rewind starter assembly according to claim 2, in which said spring is retained in said cover by a shield interposed between said spring and said pulley and secured at its periphery to said cover.
Claim 6
Dependent Claim
31 words
A rewind starter assembly according to claim 1, in which said shoulder means comprises a recess in said skirt portion of said cup having an edge engageable by said pivoted pawl.
Claim 7
Dependent Claim
215 words
A rewind starter assembly for an internal combustion engine having a shaft and a wheel on said shaft, the combination of a starter housing having an outwardly facing recess and an annular bearing extending inwardly from said recess in axial alignment with the engine shaft, a starter cup rotatably supported in Said bearing and having a skirt portion extending toward said shaft and wheel and a shank portion extending into said recess, the skirt portion of said cup having at least one shoulder means, at least one pawl on said wheel engageable with said shoulder means of the skirt portion of said cup to cause said cup, wheel and shaft to rotate together, a starter pulley in said recess and fixed on the shank portion of said cup to rotate with said cup, a wound rope on said pulley for rotating said pulley and cup in one direction, and spring means for rotating said cup and pulley in the opposite direction to rewind said rope on said pulley, said shank portion of said cup is hollow and in which said rope extends through an opening in a hub portion of said pulley and through said hollow shank portion into the interior of said skirt portion where it is secured by an enlargement in said rope.
Claim 8
Dependent Claim
215 words
A rewind starter assembly for an internal combustion engine having a shaft and a wheel on said shaft, the combination of a starter housing having an outwardly facing recess and an annular bearing extending inwardly from said recess in axial alignment with the engine shaft, a starter cup rotatably supported in Said bearing and having a skirt portion extending toward said shaft and wheel and a shank portion extending into said recess, the skirt portion of said cup having at least one shoulder means, at least one pawl on said wheel engageable with said shoulder means of the skirt portion of said cup to cause said cup, wheel and shaft to rotate together, a starter pulley in said recess and fixed on the shank portion of said cup to rotate with said cup, a wound rope on said pulley for rotating said pulley and cup in one direction, and spring means for rotating said cup and pulley in the opposite direction to rewind said rope on said pulley, said shank portion of said cup is hollow and in which said rope extends through an opening in a hub portion of said pulley and through said hollow shank portion into the interior of said skirt portion where it is secured by an enlargement in said rope.
Claim 9
Dependent Claim
33 words
A rewind starter assembly according to claim 2, in which a noncircular stud portion of said arbor extends into a noncircular recess in said cup to couple said arbor rotatively with said cup.
Claim 10
Dependent Claim
42 words
A rewind starter assembly according to claim 1, in which said wheel includes fan means for cooling the engine and in which said starter housing is provided with a ring of openings surrounding said recess to admit air to said fan means.
Claim 11
Dependent Claim
204 words
In a rewind starter assembly for an internal combustion engine having a crankshaft and a combined flywheel and fan mounted on one end of the crankshaft, the combination of a starter housing having an outwardly facing cup-shaped recess having a rim, a ring of openings surrounding said rim to admit air to said fan and an annular bearing extending inwardly from said recess in axial alignment with said crankshaft, a starter cup rotatable supported in said bearing and having a skirt portion extending toward said wheel and a reduced shank portion extending into said recess, means for releasably coupling said cup with said wheel, a starter pulley in said recess and fixed on the shank portion of said cup to rotate with said cup, a rope wound on said pulley for rotating said pulley and cup in one direction, and spring means for rotating said cup and pulley in the opposite direction to rewind said rope, said spring means comprising a dished cover for said recess, a spiral spring received in said cover and having an outer end secured to said cover, and a rotatable arbor coaxial with and rotatable with said cup, the inner end of the spring being secured to said arbor.
Claim 12
Dependent Claim
204 words
In a rewind starter assembly for an internal combustion engine having a crankshaft and a combined flywheel and fan mounted on one end of the crankshaft, the combination of a starter housing having an outwardly facing cup-shaped recess having a rim, a ring of openings surrounding said rim to admit air to said fan and an annular bearing extending inwardly from said recess in axial alignment with said crankshaft, a starter cup rotatable supported in said bearing and having a skirt portion extending toward said wheel and a reduced shank portion extending into said recess, means for releasably coupling said cup with said wheel, a starter pulley in said recess and fixed on the shank portion of said cup to rotate with said cup, a rope wound on said pulley for rotating said pulley and cup in one direction, and spring means for rotating said cup and pulley in the opposite direction to rewind said rope, said spring means comprising a dished cover for said recess, a spiral spring received in said cover and having an outer end secured to said cover, and a rotatable arbor coaxial with and rotatable with said cup, the inner end of the spring being secured to said arbor.
Claim 13
Dependent Claim
51 words
A rewind starter assembly according to claim 8, in which said cover has a rim portion rotatably received in said recess, said cover being rotated to apply initial tension to the spring, and in which means is provided for securing said cover in the position to which it has been rotated.
References Cited (Backward Citations)
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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) | 1974-03-15 | 1974-09-14 | 1975-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-15 | 1978-09-14 | 1979-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-15 | 1982-09-14 | 1983-03-16 | $7700.00 | Window Closed / Lapsed |