US3861239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engine combustion control crankshaft
Assignee: Individual
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Filing: 1972-06-05
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Granted: 1975-01-21
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Expires: 1992-06-05
Abstract
Abstract A crankshaft for internal combustion engines comprising a plurality of crank throws whose crank radii are made to vary throughout the crankshaft revolution. In this invention a rotating eccentric is placed between the connecting rod and crankpin of each crankthrow. The eccentrics are rotated relative to the motion of the crankshaft by a gear and pinion system engaged with a gear belt or a sprocket and chain drive system. Rotation of the eccentric may be clockwise or counter clockwise depending on the arrangement of gears used to generate either epicycloidal or hypocycloidal motion. Rotation of the eccentrics varies the effective centerline to centerline distance of each crank throw in a manner relative to the motion of the engine piston resulting in more efficient combustion and more efficient mechanical utilization of the combustion gases during the power cycle.
Inventors
- 👤 Edward M Mcwhorter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:59
CPC Classifications
F; F02; F02B; F02B41/00; F02B41/02; F02B41/04; F16; F16C; F16C9/00; F16C9/04; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19555; Y10T74/21; Y10T74/2173; Y10T74/2181
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
197 words
In an engine of the character described, an engine block, a plurality of axially aligned main journal shafts journalled in said engine block, an arm fixed on an end of each said main journal shafts, said arms fixedly attached in pairs between said main journal shafts by a pin, said pair of arms forming a crank span, a first arm of said crank span being bent to form an instep, a non-circular internally toothed gear vertically placed over said instep and fixedly attached to said engine block, a non-circular pinion gear rotatably mounted on the inside of said first arm opposite said instep and engaging the teeth of said non-circular internally toothed gear, a gear belt pulley fixedly attached to said non-circular pinion gear, a second gear belt pulley rotatably mounted on said pin and engaging the first named gear belt pulley by a gear belt, an eccentric rotatably mounted on said pin and fixedly attached to said second gear belt pulley, a connecting rod having one end connected to a piston and the other end journaled on the said eccentric for raising and lowering said piston upon said pin on rotation of the main journal shafts.
Claim 2
Dependent Claim
197 words
In an engine of the character described, an engine block, a plurality of axially aligned main journal shafts journalled in said engine block, an arm fixed on an end of each said main journal shafts, said arms fixedly attached in pairs between said main journal shafts by a pin, said pair of arms forming a crank span, a first arm of said crank span being bent to form an instep, a non-circular internally toothed gear vertically placed over said instep and fixedly attached to said engine block, a non-circular pinion gear rotatably mounted on the inside of said first arm opposite said instep and engaging the teeth of said non-circular internally toothed gear, a gear belt pulley fixedly attached to said non-circular pinion gear, a second gear belt pulley rotatably mounted on said pin and engaging the first named gear belt pulley by a gear belt, an eccentric rotatably mounted on said pin and fixedly attached to said second gear belt pulley, a connecting rod having one end connected to a piston and the other end journaled on the said eccentric for raising and lowering said piston upon said pin on rotation of the main journal shafts.
Claim 3
Dependent Claim
196 words
In engines of the character described, an engine block, first and second axially aligned main journal shafts in said engine block, an arm fixed on an end of each said main journal shafts, said arms fixedly attached in pairs between said main journal shafts by a pin to form a crank throw, a non-circular internally toothed gear centered over said first main journal shaft and fixedly attached to said engine block, a non-circular pinion gear fixedly attached to one end of a shaft rotatably mounted on said first arm of said crank throw and engaging the teeth of said non-circular internally toothed gear, said rotatably mounted shaft extending through said first arm opposite said pin and fixedly attached to a sprocket gear at the other end, a second sprocket gear rotatably mounted on said pin and engaging the first named sprocket gear by a sprocket chain, an eccentric rotatably mounted on said pin and fixedly attached to said second sprocket gear, a connecting rod having one end connected to a piston and the other end journalled on the said eccentric for raising and lowering the said piston upon said pin on rotation of said crank throw.
Claim 4
Dependent Claim
196 words
In engines of the character described, an engine block, first and second axially aligned main journal shafts in said engine block, an arm fixed on an end of each said main journal shafts, said arms fixedly attached in pairs between said main journal shafts by a pin to form a crank throw, a non-circular internally toothed gear centered over said first main journal shaft and fixedly attached to said engine block, a non-circular pinion gear fixedly attached to one end of a shaft rotatably mounted on said first arm of said crank throw and engaging the teeth of said non-circular internally toothed gear, said rotatably mounted shaft extending through said first arm opposite said pin and fixedly attached to a sprocket gear at the other end, a second sprocket gear rotatably mounted on said pin and engaging the first named sprocket gear by a sprocket chain, an eccentric rotatably mounted on said pin and fixedly attached to said second sprocket gear, a connecting rod having one end connected to a piston and the other end journalled on the said eccentric for raising and lowering the said piston upon said pin on rotation of said crank throw.
Claim 5
Dependent Claim
191 words
In engines of the character described, an engine block, first and second axially aligned main journal shafts journalled in said engine block, an arm fixed on an end of each said main journal shafts, said arms fixedly attached in pairs between said main journal shafts by a pin forming a crank throw, a non-circular gear centered over said first main journal shaft and fixedly attached to said engine block, a non-circular pinion gear fixedly attached to one end of a shaft rotatably mounted on one arm of said crank throw opposite said pin and engaging the teeth of the first named non-circular gear, said rotatably mounted shaft extending through said one arm and fixedly attached to a sprocket gear at the other end, a second sprocket gear rotatably mounted on said pin and engaging said first named sprocket gear by a sprocket chain, an eccentric rotatably mounted on said pin and fixedly attached to said second sprocket gear, a connecting rod having one end connected to a piston and the other end journalled on said eccentric for raising and lowering said piston upon said pin on rotation of said crank throw.
Claim 6
Dependent Claim
191 words
In engines of the character described, an engine block, first and second axially aligned main journal shafts journalled in said engine block, an arm fixed on an end of each said main journal shafts, said arms fixedly attached in pairs between said main journal shafts by a pin forming a crank throw, a non-circular gear centered over said first main journal shaft and fixedly attached to said engine block, a non-circular pinion gear fixedly attached to one end of a shaft rotatably mounted on one arm of said crank throw opposite said pin and engaging the teeth of the first named non-circular gear, said rotatably mounted shaft extending through said one arm and fixedly attached to a sprocket gear at the other end, a second sprocket gear rotatably mounted on said pin and engaging said first named sprocket gear by a sprocket chain, an eccentric rotatably mounted on said pin and fixedly attached to said second sprocket gear, a connecting rod having one end connected to a piston and the other end journalled on said eccentric for raising and lowering said piston upon said pin on rotation of said crank throw.
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) | 1978-01-20 | 1978-07-22 | 1979-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-20 | 1982-07-22 | 1983-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-20 | 1986-07-22 | 1987-01-21 | $7700.00 | Window Closed / Lapsed |