Motor-compressor unit

Details Motor-compressor unit Motor-compressor unit

1992-02-20

1993-06-29

Smith, Leonard E.

Pumps

Motor driven

Electric or magnetic motor

417435, 417439, 417534, F04B 3504, F04B 3912

Patent

active

052228770

ABSTRACT:
A motor compressor unit comprises a hermetically sealed housing, a vibration motor with a rotationally vibrating drive shaft, and a symmetrical twin free-piston compressor comprising two oppositely disposed identical free pistons which can be reciprocated in respective cylinders by the drive shaft. In order to minimize piston drift from the center position, each cylinder is formed with a duct connecting the respective compression space to the space between the housing and the motor-compressor where the suction pressure prevails, which ducts are situated at equal distances from the respective cylinder end walls and can be closed by the respective pistons. As a result of this, the pressure in both cylinders is built up with the same swept volume and piston drift is minimized.

REFERENCES:
patent: 3828558 (1974-08-01), Beale
patent: 3937600 (1976-02-01), White
patent: 4067667 (1978-01-01), White
patent: 4407252 (1983-10-01), Dilliner
patent: 4750871 (1988-06-01), Curwen
patent: 4810915 (1989-03-01), Lissenburg et al.

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