Pumps – Motor driven – Electric or magnetic motor
Reexamination Certificate
2005-07-19
2005-07-19
Freay, Charles G. (Department: 3746)
Pumps
Motor driven
Electric or magnetic motor
C417S412000, C417S477100, C417S477300, C417S477500, C417S477900
Reexamination Certificate
active
06918748
ABSTRACT:
A tube pump (1A) of the present invention is provided with a main body (2) to which a tube (100) is attached, a rotor (5), an oscillator (6) located so as to touch an outer circumferential face of the rotor (5), and a plurality of rollers (10) mounted to the rotor (5) for pressurizing and thereby squeezing the tube (100). The oscillator (6) is essentially shaped like a rectangular plate, and is formed by laminating an electrode, a piezoelectric element, and a reinforcing plate. When an alternating current voltage is applied to the piezoelectric element, the oscillator (6) oscillates longitudinally in the direction of the length at minute amplitude as the piezoelectric element expands and contracts. The rotor (5) receives a frictional force and a pressing force from a convex portion (66) when the oscillator (6) expands, and the rotor (5) rotates as it repetitively receives the frictional force and the pressing force. Consequently, it is possible to provide a tube pump having a simple structure, and hence, having an advantage in reducing the size, particularly the thickness thereof.
REFERENCES:
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European Search Report, dated Nov. 3, 2003.
Communication from Korean Patent Office regarding counterpart application.
Freay Charles G.
Harness & Dickey & Pierce P.L.C.
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