Patent US4570586A successfully refreshed from Google Patents.
US4570586A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engine
Assignee: University of Manchester
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Filing: 1982-03-16
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Granted: 1986-02-18
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Expires: 2002-03-16
Abstract
Abstract An internal combustion engine having an oil-retaining cylinder block and crankcase (10), a cylinder head (11), a cylinder liner (12) defining the cylinder (13) in which a piston (14) reciprocates, and a crankshaft (15) on which the piston is mounted via a connecting rod (16). The flywheel (17) is mounted on the crankshaft (15) and extends upwardly alongside the base of the cylinder liner (12) whereby the maximum radius of the flywheel is greater than the minimum distance between the rotational axis of the crankshaft and the lowermost position occupied by the base of the piston at bottom dead centre position. Thus there is provided an offset flywheel of low mass but providing a substantial moment of inertia while the overall height of the engine is be reduced without loss of horsepower.
Inventors
- 👤 Geoffrey E. Roe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:18
CPC Classifications
F; F02; F02B; F02B75/00; F02B75/16; F02B75/06; F02F; F02F7/00; F02F7/0065; F02F7/0068; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2173; Y10T74/2183; Y10T74/2184
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
103 words
An internal combustion engine of the kind having a crankshaft, at least one piston reciprocating within a cylinder, a flywheel co-axially mounted on the crankshaft, and an oil-retaining crankcase housing the crankshaft, characterized in that the flywheel, in the shape of an annular ring, is housed within the crankcase and is offset axially from the cylinder along said crankshaft and is so configured and positioned that a portion of its periphery stands directly alongside and adjacent a portion of said cylinder, and with a balance weight being attached to the crankshaft adjacent the flywheel, said balance weight being positioned directly below the cylinder.
Claim 2
Dependent Claim
103 words
An internal combustion engine of the kind having a crankshaft, at least one piston reciprocating within a cylinder, a flywheel co-axially mounted on the crankshaft, and an oil-retaining crankcase housing the crankshaft, characterized in that the flywheel, in the shape of an annular ring, is housed within the crankcase and is offset axially from the cylinder along said crankshaft and is so configured and positioned that a portion of its periphery stands directly alongside and adjacent a portion of said cylinder, and with a balance weight being attached to the crankshaft adjacent the flywheel, said balance weight being positioned directly below the cylinder.
Claim 3
Dependent Claim
30 words
An internal combustion engine according to claim 1, wherein the flywheel is formed as an annular ring attached to a balance weight and web arrangement itself rigid with the crankshaft.
Claim 4
Dependent Claim
57 words
An internal combustion engine according to claim 1, comprising a combined cylinder block and crankcase containing a cylinder liner defining the cylinder in which the piston reciprocates, said flywheel in its upper region standing alongside the lower region of said cylinder linear whereby the piston can descend to a position just below the base of said liner.
Claim 5
Dependent Claim
32 words
An internal combustion engine according to claim 1, including a pair of cylinders arranged side-by-side in the crankcase, said flywheel being disposed such that its periphery extends upwardly between said two cylinders.
Claim 6
Dependent Claim
47 words
An internal combustion engine according to claim 1, wherein a cylinder liner defines the cylinder within which the piston reciprocates, a portion of said cylinder liner serving as a vertical wall which defines a portion of the cavity in said crankcase within which said flywheel is housed.
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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) | 1989-02-17 | 1989-08-19 | 1990-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-17 | 1993-08-19 | 1994-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-17 | 1997-08-19 | 1998-02-18 | $7700.00 | Window Closed / Lapsed |