Crankshaft apparatus
US4301776A · kind A · utility
Inventor
Key dates
| Filing date | Feb 28, 1980 |
| Grant date | Nov 24, 1981 |
| Priority date | — |
| Expiry date | Feb 28, 2000 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B2075/025
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An equal diameter cam is mounted on the output shaft of an internal combustion engine or drive shaft of a piston-type compressor. A piston is joined by a connecting rod to a frame carrying two equal diameter follower rollers engaging the surface of a cam and located at diametrically-opposite points on a line through the center of rotation of the cam. A control arm can be used to control the position of a follower roller. The rotational axis of each follower roller is spaced by the cam surface from the rotational axis of the drive output shaft to transmit torque by converting reciprocating motion impressed by the follower rollers on the cam surface according to the equation: EQU R=r+1/2S sin (.theta.)+1/2S' sin 3 (.theta.+a)+1/2S" sin 5 (.theta.+b)+1/2S'" sin 9(.theta.+c)+1/2S"" sin 15 (.theta.+d)+1/2S""' sin 45 (.theta.+e) where: PA1 R is the radial distance between the rotational axes of the shaft member and a follower member at angle .theta., PA1 r is the average displacement radius of the axis of the follower roller, PA1 S, S', S", S"', S""S and ""' are radial variations in the cam surface with S not equal to zero and having the greatest absolute value, PA1 a, b, c, d and e are …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.