Assignee: Piezo Electric Products, Inc.

Location: Cambridge, MA
No. of patents: 21

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Number	Title	Issue Date
4791251	Delayed actuator with visco-elastic timer A delayed actuator mechanism with visco-elastic timer is provided including a support section and an actuator section mounted to the support section. A compression spring biases the actuator section in a first state and permits the actuator section to be ...	12/13/1988
4753579	Ultrasonic resonant device An ultrasonic wave generator includes a resonant member tapered to a thin edge, the member having a Q of about 300 or more....	06/28/1988
4742189	Visco-elastic delayed actuator A visco-elastic actuator mechanism including a support section and an actuator section. A visco-elastic adhesive is mounted to one of the sections and is engageable by the other of the sections to hold the actuator in a first state. A spring urges apart o...	05/03/1988
4702418	Aerosol dispenser An aerosol dispenser including a nozzle chamber for holding fluid to be dispensed and a diaphragm forming at least a portion of the chamber and having an aerosol dispensing nozzle disposed therein. The chamber includes a nozzle region proximate the nozzle...	10/27/1987
4684328	Acoustic pump An acoustic pump including a resonant member having low internal damping and asymmetrically tapered to a thin edge; a piezoelectric driver mounted on the resonant member; and means for applying an alternating voltage to the piezoelectric driver in the res...	08/04/1987
4683161	Ceramic body with ordered pores A monolithic ceramic body with ordered pores and a method of making a monolithic ceramic body is provided including applying a fugitive material in a pattern having a predetermined order, size, shape, orientation and location to a broad surface of at leas...	07/28/1987
4615211	Pressure gauge for tires and other elastic vessels A pressure gauge including: a deformable element; a rigid guard element surrounding the deformable element to form an engagement face; and means for sensing the deformation of the deformable element as an indication of pressure....	10/07/1986
4595338	Non-vibrational oscillating blade piezoelectric blower A non-vibrational oscillating blade piezoelectric blower is disclosed, including: a piezoelectric bender and means for supporting the piezoelectric bender at its inertial nodes. Weights may be attached to the bender to control the location of the inertial...	06/17/1986
4549115	Heat-sensitive variable-resistance light socket insert with resilient contact A heat-sensitive variable-resistance insert device for use with a light bulb and socket, including: a heat-sensitive variable-resistance wafer for interconnecting the central contact of the socket with the central contact of the light bulb. An annular ins...	10/22/1985
4508994	Heat-sensitive variable-resistance light socket insert A heat-sensitive variable-resistance insert device for use with a light bulb and socket including: a thin, heat-sensitive variable-resistance wafer and a perimetrical insulation member surrounding the edge of the wafer and electrically insulating it from ...	04/02/1985
4498851	Solid state blower A pumping device comprising: a housing; piezoelectric element having one end mounted to the housing and one end free; a generally planar impeller blade connected to the free end of the piezoelectric element and having its distal end unconstrained by the h...	02/12/1985
4475823	Self-calibrating thermometer A calibration system for a temperature sensing probe in an electronic thermometer, including: a reference temperature element having a characteristic that varies as a function of temperature; a reference temperature sensing circuit, responsive to the refe...	10/09/1984
4473859	Piezoelectric circuit breaker A piezoelectric circuit breaker including: a line terminal and a load terminal; contact means interconnected between the terminals; means responsive to an increase in load current between the terminals for generating a voltage indicative of an overload cu...	09/25/1984
4467236	Piezoelectric acousto-electric generator A piezoelectric generator for converting acoustic energy in a predetermined frequency range to electric energy including: a piezoelectric bending element; means for mounting the piezoelectric bending element in an acoustic energy path; tuning means mounte...	08/21/1984
4461968	Piezoelectric relay with magnetic detent A magnetically detented piezoelectric relay including a piezoelectric bender element having a fixed portion and a movable portion; means for providing an actuating voltage to deflect the bender element; first contact means mounted on the movable portion; ...	07/24/1984
4458171	Piezoelectric relay with tapered magnetic detent A magnetically detented piezoelectric relay including a piezoelectric bender element having a fixed portion and a movable portion; means for providing an actuating voltage to deflect the bender element; first contact means mounted on the movable portion; ...	07/03/1984
4456394	Piezoelectric printer and asymmetric piezoelectric actuator used therein A piezoelectric printer including: a frame; a plurality of printer units mounted on the frame; each unit including an asymmetric piezoelectric bender including one or more piezoelectric members and having a mounting portion and an actuating portion, the a...	06/26/1984
4420266	Piezoelectric printer and piezoelectric multilam actuator used therein A piezoelectric printer including: a frame; a plurality of printer units mounted on the frame; each unit including a piezoelectric multilam including at least two piezoelectric members and having a mounting portion and an actuating portion; the actuating ...	12/13/1983
4387318	Piezoelectric fluid-electric generator A piezoelectric fluid-electric generator including: a piezoelectric bending element; means for mounting one end of the bending element in a fluid stream; means for driving the piezoelectric bending element to oscillate with the energy of the fluid stream;...	06/07/1983
4383195	Piezoelectric snap actuator A piezoelectric actuator including a piezoelectric element; a snap-action device for exerting a positive force in opposition to the piezoelectric element and having a predetermined reaction force that must be overcome to cause the snap action; the piezoel...	05/10/1983
4362407	Piezoelectric printer and piezoelectric multilam actuator used therein A piezoelectric printer including: a frame; a plurality of printer units mounted on the frame; each unit including a piezoelectric multilam including at least two piezoelectric members and having a mounting portion and an actuating portion; the actuating ...	12/07/1982

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Assignee: Piezo Electric Products, Inc.