Piston balancing system

Details Piston balancing system Piston balancing system

2006-10-10

2006-10-10

Lazo, Thomas E. (Department: 3745)

Expansible chamber devices

With linkage or transmission having relatively movable members

C074S603000

Reexamination Certificate

active

07117781

ABSTRACT:
A piston pump or compressor has a dynamically balanced drive assembly in which nearly all of the rotational, oscillatory and axial forces on the rotating drive shaft are canceled. The piston is primarily balanced by adding an oscillating counter weight mounted to the connecting rod to convert oscillatory forces into rotational forces at the axis of an eccentric element mounting the piston to the drive shaft. The remaining unbalanced rotational forces are centered along the drive shaft by a rotating counter weight. A further counter weight is mounted to the drive shaft spaced along the drive shaft from the rotating counter weight to impart a counter moment on the drive shaft and essentially cancel the moment about a moment axis perpendicular to the drive shaft resulting from the axial spacing of the piston and the other two counter weights. A method of reducing vibration on a piston drive shaft is also disclosed.

REFERENCES:
patent: 4509378 (1985-04-01), Brown
patent: 5644969 (1997-07-01), Leu et al.
patent: 4122198 (1992-01-01), None
patent: 19903185 (2000-08-01), None

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