Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
2005-03-15
2005-03-15
Budd, Mark (Department: 2834)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
Reexamination Certificate
active
06867532
ABSTRACT:
A piezoelectric drive, and the rotor and/or pushers thereof, have long life, e.g. at least about 6000 hours of actual operation. The piezoelectric drive also is highly accurate, and is relatively inexpensive to make. The rotor friction surface and/or pushers are made from a material having a low mechanical quality factor, yet with high strength and stability under the conditions encountered in the ultrasonic fields typical of piezoelectric drives. The material is preferably a semi-crystalline thermoplastic polymer (e.g. polyarylamide) with filler (e.g. glass particles or fiberglass), e.g. about 30-60% polymer and about 40-70% filler, and can easily make injection molded components or parts or components. A pair of drives may be connected together to form an instrument, for example rotating a shaft connected to a pointer of analog instrument either clockwise or counterclockwise. Analog instruments, such as thermometers, barometers, speedometers, altimeters, pH meters, anemometers, etc., or other precision devices may utilize the piezoelectric drive. Alternatively, the piezoelectric drive may drive other mechanical devices such as gears, encoding locks, servo systems, point of purchase devices, micro pumps, clocks, timers, etc.
REFERENCES:
patent: 4019073 (1977-04-01), Vishnevsky et al.
patent: 4400641 (1983-08-01), Vishnevsky et al.
patent: 4453103 (1984-06-01), Vishnevsky et al.
patent: 4651310 (1987-03-01), Kaneko et al.
patent: 4670074 (1987-06-01), Broussoux et al.
patent: 4884002 (1989-11-01), Eusemann et al.
patent: 4917810 (1990-04-01), Tsunooka et al.
patent: 4959580 (1990-09-01), Vishnevsky et al.
patent: 5352950 (1994-10-01), Shirasaki
patent: 6469420 (2002-10-01), Iarochenko et al.
patent: 6479922 (2002-11-01), Iarochenko et al.
patent: 6502338 (2003-01-01), Marshall
patent: 0 932 208 (1999-07-01), None
patent: 04042787 (1992-02-01), None
Description of IXEF polyarylamide resin, admitted prior art, www.solvayadvancedpolymers.com.
Description of polyarylamide, admitted prior art, www.azom.com.
Online Material Data Sheets for IXEF1032 & 1022, admitted prior art, www.matweb.com.
Brady Kevin
Hamberger Gyula
Nunes Brendon
Vyshnevskyi Dmytro
Budd Mark
Nixon & Vanderhye P.C.
The Brady Group Inc.
Trintec Industries Inc.
LandOfFree
Long life piezoelectric drive and components does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Long life piezoelectric drive and components, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Long life piezoelectric drive and components will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3373083