Hall switch pump

Details Hall switch pump Hall switch pump

1980-09-25

1983-11-08

Smith, Leonard E.

Pumps

Processes

417417, 310 34, 318127, F04B 1704, H02K 3310

Patent

active

044139500

ABSTRACT:
An electromagnetic fluid pump having a magnet attached to a reciprocating piston and a Hall effect switch detecting the magnetic field generated by the moving magnet. In a first position of the magnet, the magnetic field through the hall effect switch is in a first direction causing the hall effect switch to generate a signal having a first polarity. In a second position of the magnet the magnetic field through the hall effect switch is reversed, reversing the polarity of the signal generated by the hall effect switch. An electronic switch circuit responsive to the signal generated by the hall effect having the first polarity to energize the solenoid coil to retract the piston from the first position to the second position against the force of a spring and further responsive to the signal having a reversed polarity to deenergize the solenoid coil when the piston is in said second position.

REFERENCES:
patent: 3293516 (1966-12-01), Maier et al.
patent: 3364361 (1968-01-01), Burger
patent: 3515966 (1970-06-01), De Valroger et al.
patent: 4086518 (1978-04-01), Wilkinson
M. Oppenheimer, "In IC Form, Hall-Effect Devices Can Take on Many New Applications", Electronics, pp. 46-49, Aug. 2, 1971.
J. L. Di Filippo, "A Silicon Hall Effect Latching Switch", Conference Proc. 30th Electronic Components Conference (28-30 Apr. 1980), IEEE.

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