Patent US4320671A successfully refreshed from Google Patents.
US4320671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crankshaft counterbalancing
Assignee: Individual
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Filing: 1980-04-28
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Granted: 1982-03-23
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Expires: 2000-04-28
Abstract
Abstract Mechanism for counterbalancing a crankshaft, connecting rod and piston assembly. Carried by the shaft are the typical or conventional counterbalancing mass means. The invention provides additional counterbalancing mass means which are rotatable relative to the shaft and relative to the regular counterbalancing means in a manner to counterbalance through 360°. The additional counterbalancing means are driven by a gear means coaxial with the shaft and additional driving planetary gear means mounted on a shaft which planetates, the planetary gear means not rotating about their axes. The additional counterbalancing mass means are driven at a speed twice that of the regular counterbalancing masses. The conventional counterbalancing masses and the additional counterbalancing masses take relative positions throughout the 360° to counterbalance at all positions.
Inventors
- 👤 Robert R. Curasi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:26
CPC Classifications
F; F16; F16C; F16C3/00; F16C3/04; F16C3/20; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2173; Y10T74/2183; Y10T74/2184
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
138 words
In mechanism including a shaft, a cylinder having an axis, a reciprocating piston, connecting rod and crankpin means for driving the shaft, the crankpin means having top dead center and bottom dead center positions with respect to said axis, means for counterbalancing through 360° including said mechanism having a first conventional counterbalancing mass means rotatable around the shaft, which align with the connecting rod and said axis at bottom dead center and at top dead center positions, second counterbalancing mass means, drive means whereby the second counterbalancing mass means is rotated about the axis of the shaft, said drive means being constructed to rotate the said second counterbalancing mass means relatively so that at both top dead center and bottom dead center positions of the crank pin means the second counterbalancing means are at bottom dead center position.
Claim 2
Dependent Claim
138 words
In mechanism including a shaft, a cylinder having an axis, a reciprocating piston, connecting rod and crankpin means for driving the shaft, the crankpin means having top dead center and bottom dead center positions with respect to said axis, means for counterbalancing through 360° including said mechanism having a first conventional counterbalancing mass means rotatable around the shaft, which align with the connecting rod and said axis at bottom dead center and at top dead center positions, second counterbalancing mass means, drive means whereby the second counterbalancing mass means is rotated about the axis of the shaft, said drive means being constructed to rotate the said second counterbalancing mass means relatively so that at both top dead center and bottom dead center positions of the crank pin means the second counterbalancing means are at bottom dead center position.
Claim 3
Dependent Claim
39 words
A mechanism as in claim 1 wherein at top dead center position of the crankpin means, the first counterbalancing mass means are at bottom dead center position, and the second counterbalancing mass means are at bottom dead center position.
Claim 4
Dependent Claim
81 words
A mechanism as in claim 2 wherein at the 90° crank position of clockwise rotation from top dead center position (0° position) of the crankpin means the first mass means are in the 270° clockwise position and the second counterbalancing mass means are at the top dead center position; and at the clockwise 270° degree crank position of the crankpin means the first counterbalancing masses are at the 90° position and the second counterbalancing mass means are at the 0° position.
Claim 5
Dependent Claim
59 words
A mechanism as in claim 1 wherein the drive means for the second counterbalancing mass means includes planetary gear means carried by the first counterbalancing mass means, gear means driving the second counterbalancing mass means meshing with the planetary gear means whereby the second counterbalancing gear means are driven in a direction the same as the first counterbalancing means.
Claim 6
Dependent Claim
23 words
A construction as in claim 4, wherein said planetary gear means are held from rotation about the axis of the planetary gear means.
Claim 7
Dependent Claim
26 words
A construction as in claim 4, wherein said gear means are constructed to drive the additional counterbalancing means at twice the speed of the said shaft.
Claim 8
Dependent Claim
45 words
A construction as in claim 4, including a shaft on which the planetary gear means are mounted, the connecting rod means being connected to the last said shaft, and the said gear means driving the second counterbalancing means being fixed on the first said shaft.
Claim 9
Dependent Claim
65 words
A construction as in claim 4, wherein said first counterbalancing mass means comprises a pair of similar members, the additional counterbalancing mass means comprises a pair of similar members, said drive gear means comprising a pair of gears associated with the additional counterbalancing means and said planetary gear means comprising a pair of gears meshing with the gears associated with the additional counterbalancing mass means.
Claim 10
Dependent Claim
141 words
In mechanism including a shaft, a cylinder having an axis, a reciprocating piston, connecting rod and crankpin means for driving the shaft, the crankpin means having top dead center and bottom dead center positions, means for counterbalancing through 360° including said mechanism having a first conventional counterbalancing mass means rotatable around the shaft, which align with the connecting rod and said axis at bottom dead center and at top dead center positions, second counterbalancing means, drive means whereby the second counterbalancing mass means is rotated about the axis of the shaft, said drive means being constructed to rotate the second counterbalancing mass means, the first and second counterbalancing mass means being angularly related whereby in both the top dead center and bottom dead center positions of the crankpin means the second counterbalancing mass means are at the bottom dead center position.
Claim 11
Dependent Claim
141 words
In mechanism including a shaft, a cylinder having an axis, a reciprocating piston, connecting rod and crankpin means for driving the shaft, the crankpin means having top dead center and bottom dead center positions, means for counterbalancing through 360° including said mechanism having a first conventional counterbalancing mass means rotatable around the shaft, which align with the connecting rod and said axis at bottom dead center and at top dead center positions, second counterbalancing means, drive means whereby the second counterbalancing mass means is rotated about the axis of the shaft, said drive means being constructed to rotate the second counterbalancing mass means, the first and second counterbalancing mass means being angularly related whereby in both the top dead center and bottom dead center positions of the crankpin means the second counterbalancing mass means are at the bottom dead center position.
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) | 1985-03-22 | 1985-09-21 | 1986-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-22 | 1989-09-21 | 1990-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-22 | 1993-09-21 | 1994-03-23 | $7700.00 | Window Closed / Lapsed |