Patent US2504515A successfully refreshed from Google Patents.
US3828655A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coaxial engine
Assignee: Individual
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Filing: 1972-10-06
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Granted: 1974-08-13
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Expires: 1992-10-06
Abstract
Abstract An engine which is composed of a piston reciprocally movable in a cylinder, the follower connected to the piston which communicates with a substantially sinusoidal groove in a sleeve, the sleeve surrounding a portion of the cylinder, a power takeoff assembly coupled to the sleeve and effects transfer of the rotational movement of the sleeve to an output shaft, the longitudinal axis of the output shaft in alignment with the longitudinal axis of the cylinder and the longitudinal axis of the sleeve and the longitudinal axis of the piston.
Inventors
- 👤 B Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:05
CPC Classifications
F; F02; F02B; F02B75/00; F02B75/28; F01; F01B; F01B17/00; F01B17/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
200 words
An engine comprising: a fixed cylinder having an internal chamber, said cylinder having a longitudinal central axis, said cylinder being closed at each of its longitudiNal ends; a piston movably retained within said chamber, means to conduct fluid alternately into said ends of said chamber to cause said piston to reciprocally move within said chamber; a sleeve surrounding a portion of said cylinder and rotatably mounted thereon, the longitudinal central axis of said sleeve coinciding with said longitudinal central axis of said cylinder, cam and follower means connecting said sleeve and said piston, said cam and follower means causing rotational movement of said sleeve, an output shaft means connected to said sleeve, whereby the rotational movement of said sleeve is transferred to said output shaft means; and said cam and follower means comprises a substantially sinusoidal slot formed within said sleeve and a follower rod connected to said piston, a single pair of diametrically opposed slots formed within said cylinder, said follower rod passing through said slot means into cooperation with said sinusoidal groove within said sleeve, the length of said slots to be substantially equal to the sum of the positive and negative amplitude values of said sinusoidal slot.
Claim 2
Dependent Claim
200 words
An engine comprising: a fixed cylinder having an internal chamber, said cylinder having a longitudinal central axis, said cylinder being closed at each of its longitudiNal ends; a piston movably retained within said chamber, means to conduct fluid alternately into said ends of said chamber to cause said piston to reciprocally move within said chamber; a sleeve surrounding a portion of said cylinder and rotatably mounted thereon, the longitudinal central axis of said sleeve coinciding with said longitudinal central axis of said cylinder, cam and follower means connecting said sleeve and said piston, said cam and follower means causing rotational movement of said sleeve, an output shaft means connected to said sleeve, whereby the rotational movement of said sleeve is transferred to said output shaft means; and said cam and follower means comprises a substantially sinusoidal slot formed within said sleeve and a follower rod connected to said piston, a single pair of diametrically opposed slots formed within said cylinder, said follower rod passing through said slot means into cooperation with said sinusoidal groove within said sleeve, the length of said slots to be substantially equal to the sum of the positive and negative amplitude values of said sinusoidal slot.
Claim 3
Dependent Claim
49 words
The engine as defined in claim 1 wherein: said groove having a plurality of top dead center points, a leaf spring means located within said groove adjacent each of said top dead center points, whereby said spring assists in movement of said follower past said top dead center points.
Claim 4
Dependent Claim
33 words
The engine as defined in claim 1 wherein: said output shaft means includes a ring gear assembly externally mounted on said sleeve, the moment of the torque created about said cylinder being zero.
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) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |