US3798996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable eccentric crankshaft
Assignee: Individual
•
Filing: 1973-03-23
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Granted: 1974-03-26
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Expires: 1993-03-23
Abstract
Abstract A crankshaft in a reciprocating machine has an outer crank sleeve rotatably mounted on two spaced apart eccentric collar assemblies affixed to the crankshaft which normally clamp the crank sleeve tightly in place. A threaded fastener extending through an accessible adjusting plate at one end of the crankshaft and normally holding the crankshaft assembly tightly together may be loosened to release the collar assemblies and permit the rotational adjustment of the crank sleeve through coupling means joined to the adjusting plate, to provide a predetermined eccentric displacement with respect to the rotational axis of the crankshaft.
Inventors
- 👤 J Kirschmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:05
CPC Classifications
F; F16; F16C; F16C3/00; F16C3/04; F16C3/22; F16C3/28; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/211; Y10T74/2111; Y10T74/2112
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
260 words
In a reciprocating machine, an improved adjustable eccentric crankshaft mechanism comprising: an elongated crankshaft rotatably supported at spaced points along its length; a pair of eccentric collar means mounted on said crankshaft at longitudinally spaced locations thereon and affixed to said crankshaft for rotation therewith; an outer eccentric crank sleeve having an eccentric cylindrical bore embracing said crankshaft in radially spaced apart relation thereto; a pair of eccentric recesses having an annular shoulder face at opposite end portions of said crank sleeve, said eccentric collar means being seated in said recesses and said crank sleeve being supported on said eccentric collar means and rotatably adjustable thereon about said crankshaft to position the eccentric of said crank sleeve at different angular positions with respect to the eccentrics of said pair of collar means to thereby provide a desired total eccentric displacement on said crankshaft; eccentric drive collar means rotatably mounted on said crankshaft adjacent to one end of said crank sleeve; coupling means between said drive collar means and said crank sleeve; means external to said reciprocating machine for rotating said drive collar means; and fastening means threadedly engaged with one end of said crankshaft and cooperable with retainer means on said crankshaft to normally urge said pair of eccentric collar means tightly against said annular shoulder faces of said crank sleeve recesses and thereby position and clamp said crank sleeve securely on said crankshaft, the loosening of said fastening means permitting the rotation of said drive collar means on said crankshAft and the rotational adjustment of said crank sleeve therewith.
Claim 2
Dependent Claim
260 words
In a reciprocating machine, an improved adjustable eccentric crankshaft mechanism comprising: an elongated crankshaft rotatably supported at spaced points along its length; a pair of eccentric collar means mounted on said crankshaft at longitudinally spaced locations thereon and affixed to said crankshaft for rotation therewith; an outer eccentric crank sleeve having an eccentric cylindrical bore embracing said crankshaft in radially spaced apart relation thereto; a pair of eccentric recesses having an annular shoulder face at opposite end portions of said crank sleeve, said eccentric collar means being seated in said recesses and said crank sleeve being supported on said eccentric collar means and rotatably adjustable thereon about said crankshaft to position the eccentric of said crank sleeve at different angular positions with respect to the eccentrics of said pair of collar means to thereby provide a desired total eccentric displacement on said crankshaft; eccentric drive collar means rotatably mounted on said crankshaft adjacent to one end of said crank sleeve; coupling means between said drive collar means and said crank sleeve; means external to said reciprocating machine for rotating said drive collar means; and fastening means threadedly engaged with one end of said crankshaft and cooperable with retainer means on said crankshaft to normally urge said pair of eccentric collar means tightly against said annular shoulder faces of said crank sleeve recesses and thereby position and clamp said crank sleeve securely on said crankshaft, the loosening of said fastening means permitting the rotation of said drive collar means on said crankshAft and the rotational adjustment of said crank sleeve therewith.
Claim 3
Dependent Claim
106 words
An adjustable eccentric crankshaft mechanism as defined in claim 1 wherein: said eccentric drive collar means has a slot therein extending transversely with respect to the longitudinal axis of said crankshaft; and said coupling means between said drive collar means and said crank sleeve comprises an elongated member extending substantially parallel to the longitudinal axis of said crankshaft within a wall portion of said crank sleeve and into said slot in said drive collar means, said elongated member moving back and forth within said slot as said crank sleeve is rotated by said drive collar means about said crankshaft in either a clockwise or counterclockwise direction.
Claim 4
Dependent Claim
126 words
An adjustable eccentric crankshaft mechanism as defined in claim 1 wherein: said retainer means on said crankshaft comprises a first holding sleeve slideably shiftable on said crankshaft at one end thereof and bearing at its inner end against one of said pair of eccentric collar means, and a second holding sleeve affixed to the opposite end of said crankshaft and bearing at its inner end against the other one of said pair of eccentric collar means; and said fastening means comprises a threaded member operative to draw said first holding sleeve and said crankshaft longitudinally toward each other as it is tightened on said crankshaft to thereby cause said holding sleeves to urge said eccentric collar means tightly against said end recesses of said crank sleeve.
Claim 5
Dependent Claim
89 words
An adjustable eccentric crankshaft mechanism as defined in claim 3 wherein: the inner end of said first holding sleeve is coupled to said drive collar means; and an adjusting plate is affixed to the opposite end of said first holding sleeve externally of said reciprocating machine, the loosening of said threaded member permitting the rotation of said adjusting plate and first holding sleeve about said crankshaft, whereby said adjusting plate and holding sleeve serves as said means for rotating said drive collar means to rotatably adjust said crank sleeve.
Claim 6
Dependent Claim
233 words
An adjustable eccentric crankshaft assembly in a reciprocating machine comprising: a crank shaft rotatably supported at opposite end portions thereof within a housing of said machine; an adjusting plate rotatably mounted on one end of said crankshaft externally of said housing; an eccentric drive collar rotatably mounted on said crankshaft, eccentrically with respect to the longitudinal center axis of said crankshaft, said drive collar having a slot therein extending transversely of the longitudinal axis of said crankshaft; coupling means between said adjusting plate and said drive collar; an outer eccentric crank sleeve having an eccentric cylindrical bore through which said crankshaft extends, said crank sleeve being rotatably adjustable on said crankshaft and positioned longitudinally thereon with one end adjacent to said drive collar; an elongated coupling member extending substantially parallel to the longitudinal axis of said crankshaft within a wall portion of said crank sleeve and into said slot in said drive collar; and fastening means normally holding said adjusting plate, drive collar and crank sleeve tightly together on said crank shaft for rotation therewith, the loosening of said fastening means permitting the rotational adjustment of said adjusting plate on said crankshaft, and of said drive collar and crank sleeve therewith, said elongated coupling member moving back and forth within said slot in said drive collar as said crank sleeve is revolved with said drive collar in either a clockwise or counterclockwise direction.
Claim 7
Dependent Claim
233 words
An adjustable eccentric crankshaft assembly in a reciprocating machine comprising: a crank shaft rotatably supported at opposite end portions thereof within a housing of said machine; an adjusting plate rotatably mounted on one end of said crankshaft externally of said housing; an eccentric drive collar rotatably mounted on said crankshaft, eccentrically with respect to the longitudinal center axis of said crankshaft, said drive collar having a slot therein extending transversely of the longitudinal axis of said crankshaft; coupling means between said adjusting plate and said drive collar; an outer eccentric crank sleeve having an eccentric cylindrical bore through which said crankshaft extends, said crank sleeve being rotatably adjustable on said crankshaft and positioned longitudinally thereon with one end adjacent to said drive collar; an elongated coupling member extending substantially parallel to the longitudinal axis of said crankshaft within a wall portion of said crank sleeve and into said slot in said drive collar; and fastening means normally holding said adjusting plate, drive collar and crank sleeve tightly together on said crank shaft for rotation therewith, the loosening of said fastening means permitting the rotational adjustment of said adjusting plate on said crankshaft, and of said drive collar and crank sleeve therewith, said elongated coupling member moving back and forth within said slot in said drive collar as said crank sleeve is revolved with said drive collar in either a clockwise or counterclockwise direction.
Claim 8
Dependent Claim
173 words
An adjustable eccentric crankshaft assembly as defined in claim 5 wherein: opposed, stop, locating means are positioned on longitudinally spaced locations on said crankshaft and bear against opposite end portions of said crank sleeve; a first holding sleeve is affixed to said adjusting plate and is slideably shiftable therewith on said crankshaft to urge one of said locating means against one end of said crank sleeve; a second holding sleeve is affixed to an opposite end portion of said crankshaft and bears against the other one of said locating means at the opposite end of said crank sleeve; said fastening means comprises a bolt threaded longitudinally into said one end of said crankshaft with the head of said bolt being outside of said adjusting plate, and the tightening action of said bolt tending to draw said adjusting plate and said crankshaft longitudinally together, whereby said holding sleeves urge said opposed locating means tightly against the opposite ends of said crank sleeve to thereby clamp said crank sleeve securely in place on said crankshaft.
Claim 9
Dependent Claim
39 words
An adjustable eccentric crankshaft assembly as defined in claim 6 wherein: said first holding sleeve is coupled at its inner end to said drive collar and serves as said coupling means between said adjusting plate and said drive collar.
Claim 10
Dependent Claim
135 words
An adjustable eccentric crankshaft assembly as defined in claim 5 wherein: said adjusting plate has graduations thereon calibrated to show eccentric displacement in predetermined increments for particular angular positions of said crank sleeve relative to said crankshaft; a pointer positioned against the outside face of said adjusting plate and coupled to the end of said crankshaft; and said fastening means is a bolt threaded into said one end of said crankshaft with its head being outside of said pointer and adjusting plate and normally securing said pointer and plate together, the rotation of said adjusting plate when said bolt is loosened permitting the setting of a desired eccentric increment graduation on said adjusting plate relative to said pointer, which remains stationary with said crankshaft during the rotational adjustment of said plate and said crank sleeve.
Claim 11
Dependent Claim
139 words
An adjustable eccentric crankshaft assembly as defined in claim 5 wherein: there is a radial clearance space between said crank sleeve and said crankshaft; eccentric recesses are formed in opposite ends of said crank sleeve; and a pair of eccentric collar means are seated within said recesses around said crankshaft at opposite ends of said crank sleeve and coupled to said crankshaft for rotation therewith, said crank sleeve being rotatably supported on said eccentric collar means and rotatably adjustable thereon between a first position wherein the eccentrics of said crank sleeve and eccentric collar means neutralize each other to produce substantially zero eccentricity on said crankshaft and a second position wherein the eccentrics of said crank sleeve and said eccentric collar means are at the same angular position on said crankshaft and combine to produce maximum eccentric displacement thereon.
Claim 12
Dependent Claim
151 words
An adjustable eccentric crankshaft assembly as defined in claim 9 wherein: a first holding sleeve is affixed to said adjusting plate and slideably shiftable therewith on said crankshaft, said first holding sleeve bearing at its inner end against one of said eccentric collar means; a second holding sleeve is affixed to an opposite end portion of said crankshaft and bears at its inner end against the other one of said eccentric collar means; and said fastening means comprises a threaded member engaging said one end of said crankshaft outside of said adjusting plate, with the tightening of said threaded member drawing said adjusting plate and said crankshaft longitudinally together, whereby the inner ends of said holding sleeves urge said pair of eccentric collar means tightly against the opposite ends of said crank sleeve within said recesses to tightly clamp said crank sleeve in place between said holding sleeves on said crankshaft.
References Cited (Backward Citations)
US575646A
Cited
US2006779A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |