Pumps – Motor driven – Magnetostrictive chamber
Patent
1986-10-14
1988-02-23
Croyle, Carlton R.
Pumps
Motor driven
Magnetostrictive chamber
417410, 417505, 310 26, F04B 1700, F04B 3500
Patent
active
047267410
ABSTRACT:
A magnetostrictive hydraulic pump having a pump cylinder closed at one end with an elongated piston arranged within the cylinder from the other end. The piston is constructed of a magneto-strictive material which increases in length in the presence of a magnetic field of appropriate intensity. It is wound along its length with a coil of wire capable of producing an electromagnetic field upon energization. The piston is fastened at the open end of the cylinder to define a cylinder cavity between the cylinder closed end and the piston. A pair of passages, including valves, lead to a differential hydraulic actuator, for use as an intake and an exhaust passage to the actuator. The valve members in each cavity comprise a magnetically polarized member, each end of opposed polarity, such that upon energization of the pump with one polarity of pulses, the valves will assume a particular function, and with a reversed polarity of operating pulses, a reverse function. The volume of this cavity is reduced when the piston expands under the influence of the magnetic field created by the coil to produce a pressure on any fluid contained within said cavity to force it out the exhaust passage to activate the hydraulic cylinder. In a preferred embodiment the cylinder is constructed of a negative magneto-strictive material which contracts or shrinks in length in the presence of magnetic field.
REFERENCES:
patent: 1092453 (1914-04-01), Rainey
patent: 2772862 (1956-12-01), Van Suchtelin
patent: 2776417 (1957-01-01), Harris
patent: 2842067 (1958-07-01), Stevens
patent: 3175132 (1965-03-01), Salter
patent: 3194162 (1965-07-01), Williams
patent: 3349304 (1967-10-01), Wachter
patent: 3391680 (1968-07-01), Benson
patent: 4096735 (1978-06-01), Huntzinger et al.
Croyle Carlton R.
GTE Valeron Corporation
Koris David J.
Stout Donald E.
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