ELECTRIC PUMP AND DEVICE FOR SUCH PUMP

摘要

A reversible electric motor driven pump mounted within a housing with one end in communication and seals with the ear canal when inserted therein has a drive shall employing pump controls operably associated with the electric motor to selectively control the start, stop, operating speed, position and direction of the drive shaft in either a clockwise or counterclockwise direction to drive a rotating gear with lever structure configured to reciprocate when driven by the drive shaft to selectively compress the bellows and piston forcing air through a port to create positive pressure is the ear canal in one mode, and expand the bellows and harmonic piston to withdraw air from the ear canal and create negative pressure therein in another mode.

主权项

1. A rotationally driven hearing testing pump comprising:
a) a reversible electric motor with a gear mechanism, providing an output shaft with a lever, b) a potentiometer operably associated to the gear mechanism, adapted to read the position of the output shaft, c) a bellows or harmonic piston operably associated with the lever to alternatively vary output by compressing the bellows or harmonic piston to displace air out a port in one mode and expand the bellows or harmonic piston to draw in air through the port in another mode, d) pump controls operably associated with the reversible electric motor and the potentiometer to selectively control the start, stop, operating speed, position and direction of the shaft rotation in either a clockwise or counterclockwise direction, and e) output structure associated with the bellows or harmonic piston output in communication with the ear canal to alter the pressure therein in response to the action of the bellows or harmonic piston.