Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1991-08-02
1992-06-30
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
73715, H01L 4108
Patent
active
051266172
ABSTRACT:
A pressure sensor for providing an electrical signal corresponding to pressure in a cylinder of an automotive engine has a rigid load-spreading element rigidly secured to a first surface of a ceramic piezoelectric body by a rigid bonding material precisely conformed to the first surface to be in substantially uniform load-transferring relation to all parts of the first body surface, has a rigid support member rigidly secured to a parallel, opposite surface of the ceramic piezoelectric body by a rigid bonding material precisely conformed to the opposite surface to be in substantially uniform load-transferring relation to all parts of the opposite body surface to form a piezoelectric unit, and has a peripheral part of the rigid support member precisely mounted with an interference fit in a bore in a metal component of a mounting structure so that the body of piezoelectric material and the load-spreading element extend in cantilever relation at a precisely determined location to be engaged by force applied through a diaphragm in response to an applied pressure to provide an electrical signal precisely corresponding to the pressure.
REFERENCES:
patent: 4523121 (1985-06-01), Takahashi et al.
patent: 4570098 (1986-02-01), Tomita et al.
patent: 4780639 (1988-10-01), Shirasu
patent: 4885498 (1989-12-01), Wakita
patent: 4928264 (1990-05-01), Kahn
patent: 5038069 (1991-08-01), Lukasiewicz et al.
Anastasia Charles M.
Cooper Lawrence E.
Lukasiewicz Stanley J.
Pestana Gregg W.
Baumann Russell E.
Budd Mark O.
Donaldson Richard L.
Grossmann Rene E.
Texas Instruments Incorporated
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