Patent US3628518A successfully refreshed from Google Patents.
US3628518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engines
Assignee: Birmingham Small Arms Co Ltd
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Filing: 1969-09-10
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Granted: 1971-12-21
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Expires: 1989-09-10
Abstract
Abstract A rotatable sleeve with openings surrounds a stator having passages therethrough disposed in the induction passage of a two stroke cycle engine.
Inventors
- 👤 Gordon Purves Blair
- 👤 Mervyn Bradshaw Johnston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:22
CPC Classifications
F; F02; F02D; F02D9/00; F02D9/08; F02D9/12; F02D9/16; F01; F01L; F01L7/00; F01L7/12; F02M; F02M1/00; F02M2700/00; F02M2700/43; F02M2700/4302; F02M2700/4392
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
152 words
A two-stroke internal combustion engine comprising a cylinder block, at least one cylinder formed within said block and a piston reciprocally mounted within said cylinder, an induction passage in said block located adjacent one end of said cylinder for passing an induction mixture into said cylinder and an exhaust passage located adjacent the other end of said cylinder for exhausting combustion gases from said cylinder, a cylindrical valve chamber intersecting said induction passage, a cylindrical stator disposed concEntrically within said chamber and having a passage therethrough aligned with and of substantially the same cross-sectional shape as said induction passage, means for holding said stator stationary, and a rotatable rotor in the form of a sleeve surrounding the stator having openings and solid faces adapted to uncover and cover the passage through said stator as said rotor rotates, and bearing means for rotatably mounting said rotor on said stator in spaced relationship therefrom.
Claim 2
Dependent Claim
152 words
A two-stroke internal combustion engine comprising a cylinder block, at least one cylinder formed within said block and a piston reciprocally mounted within said cylinder, an induction passage in said block located adjacent one end of said cylinder for passing an induction mixture into said cylinder and an exhaust passage located adjacent the other end of said cylinder for exhausting combustion gases from said cylinder, a cylindrical valve chamber intersecting said induction passage, a cylindrical stator disposed concEntrically within said chamber and having a passage therethrough aligned with and of substantially the same cross-sectional shape as said induction passage, means for holding said stator stationary, and a rotatable rotor in the form of a sleeve surrounding the stator having openings and solid faces adapted to uncover and cover the passage through said stator as said rotor rotates, and bearing means for rotatably mounting said rotor on said stator in spaced relationship therefrom.
Claim 3
Dependent Claim
45 words
A two-stroke internal combustion engine as defined in claim 1, said stator having an axial boss at each end thereof, and said bearing means comprising a bearing mounted on each said boss for permitting said rotor to rotate around said stator in spaced relation therefrom.
Claim 4
Dependent Claim
49 words
A two-stroke internal combustion engine as defined in claim 1, said stator holding means being connected to and fixing one end of said stator, and another bearing disposed between the end of the rotor, remote from the fixed end of said stator, and the wall of said valve chamber.
Claim 5
Dependent Claim
53 words
A two-stroke internal combustion as defined in claim 3, wherein said remote end of said rotor has an axial shaft protruding therefrom, said another bearing being disposed between said shaft and the wall of the valve chamber, and a pulley affixed to said shaft and adapted to impart rotational movement to said rotor.
Claim 6
Dependent Claim
31 words
A two-stroke internal combustion engine as defined in claim 1, wherein the passage through said stator is of circular cross section and the openings in said rotor are of rectangular shape.
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) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |