Pumps – Motor driven – Including means for facilitating assembly or disassembly of...
Patent
1986-05-22
1987-10-27
Smith, Leonard E.
Pumps
Motor driven
Including means for facilitating assembly or disassembly of...
403364, F04B 1700
Patent
active
047026782
ABSTRACT:
An oscillator for imparting oscillation at a high frequency to respiratory gas in a pneumatic circuit of a high frequency oscillatory ventilation apparatus for artificial respiration includes a cylinder unit mounted on a base plate and including a cylinder, a piston rod slidably extending through the cylinder along an axis thereof, and a piston fixedly mounted on the piston rod and received in the cylinder for sliding movement therealong for applying oscillation to the pneumatic circuit. A first engaging member, mounted on a reciprocable output shaft of a motor mounted on the base plate, engages a second engaging member mounted on the piston rod to connect the output shaft to the piston rod to reciprocally move the piston, the engagement being made in a manner to allow the second engaging member to move out of engagement with the first engaging member in a direction perpendicular to an axis of the piston rod. A third engaging member on the base plate engages a fourth engaging member on the cylinder in a manner to allow the fourth engaging member to move out of engagement therewith in said direction. A fastening member releasably holds the fourth engaging member against movement relative to the third engaging member, thereby holding the cylinder unit against movement relative to the base plate and the motor.
REFERENCES:
patent: 718306 (1903-01-01), Boring
patent: 1672205 (1928-06-01), Eisler
patent: 2739537 (1956-03-01), Sadler et al.
patent: 3447479 (1969-06-01), Rosenberg
patent: 3697197 (1972-10-01), Berglund et al.
patent: 4204815 (1980-05-01), Le Blanc
Senko Medical Instrument Mfg. Co. Ltd.
Smith Leonard E.
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