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| Number | Title | Issue Date |
| 5170089 | Two-axis motion apparatus utilizing piezoelectric material A piezoelectric structure comprising four piezoelectric elements arranged in two rows of two each is cantilevered at one end to a reference structure and coupled at the free end to an object to be moved in two mutually orthogonal directions as a suitable ... | 12/08/1992 |
| 5162691 | Cantilevered air-gap type thin film piezoelectric resonator A method and apparatus directed to a thin film piezoelectric resonator deposited on a support layer of dielectric material and being configured in the form of a cantilever structure having a base portion formed on an integrated circuit substrate and havin... | 11/10/1992 |
| 5151626 | Repetitive pulsed Raman cell with vibrating blade In a Raman cell (10) which is subject to optical distortion of the path of a laser beam (40) by heating of the gas from the Raman conversion process, vibrating blades (50) cause the gas to mix and thus provide thermal homogeneity within the beam path.... | 09/29/1992 |
| 5089740 | Displacement generating apparatus A displacement generating apparatus having a gate-shaped structure is provided in which a plurality of bimorph-type piezoelectric elements are employed. The gate-shaped apparatus has high rigidity and a high resonance frequency, and can produce a carrying... | 02/18/1992 |
| 5083056 | Displacement generating apparatus An electrostriction actuator comprises upper and lower electrostriction boards, having electrodes individually on either side thereof, and a conductive shim interposed between the inside electrodes. The actuator has a fixed end at one end thereof and a fr... | 01/21/1992 |
| 5072240 | On-demand type ink jet print head An on-demand type ink jet print head including a drive assembly formed from a vibrating plate formed of a piezoelectric layer with an electrode layer on one surface and an electrically conductive, physically resilient layer on the opposite surface of the ... | 12/10/1991 |
| 5063321 | Torsional vibration drive A torsional vibration drive for a laser gyro comprises a hub, spokes and an outer rim, with piezoceramics arranged on the spokes. Bending elements provided at the junction of the spokes and rim ensure high flexibility for rotations of the rim around the a... | 11/05/1991 |
| 5049775 | Integrated micromechanical piezoelectric motor Small piezoelectric machines comprised of pairs of cantilever beams covered with a piezoelectric material are driven to perform various mechanical tasks. A robot utilizes a plurality of pairs of these piezoelectrically driven beams to move itself and grab... | 09/17/1991 |
| 5045745 | Spinning piezoelectric beam of a dual-axis angular rate sensor and method for its adjustment A method for adjusting a piezoelectric beam of a dual-axis angular rate sensor, in which the piezoelectric beam is excited in a direction at right angles to the lengthwise direction of two piezoelectric sensors and to a rotary shaft; detected voltages of ... | 09/03/1991 |
| 5008580 | Piezoelectric vibration generator and vibratory parts feeder incorporating the same A piezoelectric vibration generator interconnecting a base and a vibratory conveyor table of a piezoelectrically driven vibratory parts feeder includes a pair of resilient plate members joined together at their lower ends and disposed in a configuration s... | 04/16/1991 |
| 5003824 | Vibration/acceleration sensor A vibration/acceleration sensor is provided which includes a basic sensor unit fixed to a casing adapted to be mounted on a body the vibrations of which are to be detected. The sensor unit is surrounded by a resinous material having a low heat transfer co... | 04/02/1991 |
| 4988908 | Piezoelectric transducers for a ring laser gyroscope dither motor The present invention is to provide an arrangement of piezoelectric transducers attached to a dither spring spoke which allows for both flexing a dither spring spoke and sensing the flexure of the same dither spring spoke.... | 01/29/1991 |
| 4952836 | Piezoelectrostatic generator A piezoelectrostatic generator includes a plurality of elongated piezoelectrostatic elements having first and second ends, with the first ends fixedly mounted in a cylindrical housing and the second extending radially inwardly toward an axis. A shaft mova... | 08/28/1990 |
| 4927084 | Fuel injection valve A fuel injection valve wherein a reciprocable valving element is movable from closed to open position by a piezoceramic moving unit having at least two flexural resonators in the form of laminated packages of metallic carriers, ceramic layers and foil-sha... | 05/22/1990 |
| 4909260 | Portable belt monitor of physiological functions and sensors therefor A portable belt-type monitor of body functions such as the heart and breathing is described formed of a plurality of articulated, distributed modules containing EKG sensors, a respiration sensor, circuitry including a microprocessor for sensing alarm cond... | 03/20/1990 |
| 4904222 | Synchronized sound producing amusement device An amusement device is disclosed which contains a signal generator attached to a flexible member. When the flexible member is repeatedly waved, an oscillatory electrical signal is produced by the signal generator and supplied to a sound generator which pr... | 02/27/1990 |
| 4893048 | Multi-gap switch A power switch which comprises a plurality of contact pairs connected in series provides substantial operational advantages. Included in these advantages are fast operating speed and direct imposition of circuit opening. The individual contact pairs are p... | 01/09/1990 |
| 4876675 | Towed piezoelectric cable A towed piezoelectric cable having a plurality of receiver element units which are arranged on a nonshrinking flexible core with leaving a buffer zone therebetween, each of said receiver element units having two piezoelectric elements which are polarized ... | 10/24/1989 |
| 4871271 | Printing head for a wire dot printer A printing head for use with an electrodynamic type wire dot printer includes an electrodynamic wire actuator disposed in a magnetic field to be deformed by an electromagnetic force, a printing pin fixedly supported by the electrodynamic wire actuator, an... | 10/03/1989 |
| 4868448 | Piezoelectric relay switching matrix A switching matrix includes at least one array of piezoelectric relays whose cantilevered drive elements are in the form of a unitary, comb-shaped structure of the piezoceramic mateial. Each drive element carries adjacent its free end at least one movable... | 09/19/1989 |
| 4868447 | Piezoelectric polymer laminates for torsional and bending modal control Laminates of polyvinylidene fluroride (PVDF) are employed as piezoelectric sensors and actuators which can sense and/or generate complex motions that include bending, stretching, and twisting components. The laminates can be attached directly to a mechani... | 09/19/1989 |
| 4857792 | Circular direction vibrator A circular direction vibrator has a pair of piezoelectric bimorph type vibrators, and a carrier member serving as a fulcrum of a circular direction vibration shaft and adapted to support the vibrators in a cantilever fashion, the pair of vibrators extendi... | 08/15/1989 |
| 4849668 | Embedded piezoelectric structure and control A composite structural member includes multiple layers with one or more embedded piezoelectric elements. In a conductive member, an insulating sheath electrically isolates each piezoelectric element while mechanically coupling it to the surrounding layers... | 07/18/1989 |
| 4849946 | Piezo-electric transducer comprising several coaxial sensitive elements Piezoelectric transducer for the production of, for example, hydrophones, with the transducer including a plurality of sensitive coaxial elements interconnected so as to compensate for the effects of accelerations and deflections. A transducer includes at... | 07/18/1989 |
| 4841192 | Piezoelectric hydrophone A piezoelectric hydrophone is designed with overload protectors (1a, 11a, 11b) which protects the hydrophone against internal and external overpressures. The hydrophone assembly proper and a first overload protector (1a) are made in one piece, while other... | 06/20/1989 |
| 4814661 | Systems for measurement and analysis of forces exerted during human locomotion Systems including piezoelectric sensor elements advantageously mounted between supporting hard plastic material of various types or other mechanically similar materials. The sensor can further be supported by backup plate structures. Some backup plates sh... | 03/21/1989 |
| 4812698 | Piezoelectric bending actuator A piezoelectric actuator comprising a longitudinal effect-type laminated piezoelectric element composed of piezoelectric ceramic sheets laminated in their thickness direction, and a supporting member fixed to one side in the longitudinal direction of the ... | 03/14/1989 |
| 4810913 | Increased sensitivity piezoelectric hydrophones A hydrophone is provided having at least one flexible piezoelectric sensitive element applied to a support, each sensitive element being formed of a flexible piezoelectric film associated with two electrodes and is applied to a synthetic plastic material ... | 03/07/1989 |
| 4758226 | Device for distribution, particularly for medical use, of a product in predetermined metered amounts A device for dispensing a product in predetermined metered amounts. The product is contained in a tank including an output orifice associated with means which continuously control the output of product from the tank. The opening of two adjacent valves, ea... | 07/19/1988 |
| 4757223 | Linear actuator A linear actuator constructed so as to convert deformation movements of a plurality of electrostrictive elements to a reciprocating movement of an output shaft thereof. The linear actuator comprises a planetary driving unit adapted to be driven by a plura... | 07/12/1988 |
| 4742260 | Piezoelectrically driving device A piezoelectrically driving device comprises a driving part including paired opposing pole parts substantially square shaped in section, piezoelectric elements provided at least to two adjacent faces of each of the opposing pole parts for causing them to ... | 05/03/1988 |
| 4742263 | Piezoelectric switch A switch is provided wherein a piezoelectric bimorph element is used to provide many separately controllable, closely spaced switchable contacts. The element includes at least two oppositely extending fingers connected by a common spine. The element spine... | 05/03/1988 |
| 4733121 | Solid state heat to electricity converter The conversion of heat energy to electrical energy is realized by coupling memory materials to piezoelectric materials or to composite magnetoelectric materials and by subsequent hot-cold-strain cycling of the memory material. Embodiments of the invention... | 03/22/1988 |
| 4716331 | Electrically variable piezoelectric hybrid capacitor An electrically variable three terminal monomorphic piezoelectric capacitor is manufactured with thick or thin film hybrid microelectronic circuit technology. A first capacitor plate and a ridge, which substantially surrounds and extends above the first c... | 12/29/1987 |
| 4697118 | Piezoelectric switch A switch is provided wherein a piezoelectric bimorph element is used to provide many separately controllable, closely spaced switchable contacts. The element includes at least two oppositely extending fingers connected by a common spine. The element spine... | 09/29/1987 |
| 4686440 | Fine positioning device A fine positioning device is constructed of a parallel flexible-beam displacement mechanism and/or a radial flexible-beam displacement mechanism. The former displacement mechanism comprises a first rigid portion rigid against forces, a second rigid portio... | 08/11/1987 |
| 4679178 | Arrangement in hydrophone An arrangement in a piezoelectric hydrophone that is provided with a protective outer housing enveloping a waterproof closed casing (2). Said casing is provided with two mutually opposed and parallel diaphragm wafers (3) on the insides of which piezoelect... | 07/07/1987 |
| 4678955 | Piezoelectric positioning device A relatively stiff piezoelectric translator comprises at least a pair of piezoelectric devices joined together at one end and secured to a fixed support at their other ends in orthogonal directions. Displacement of one device along its longitudinal axis d... | 07/07/1987 |
| 4675567 | Electro-pneumatic pressure converter An electro-pneumatic pressure converter including a switching valve having at least one plate-like piezoelectric element, which is supported at one end in a cantilever manner inside a sealed chamber and a distal end portion of which moves upon application... | 06/23/1987 |
| 4654555 | Multi pole piezoelectrically operating relay This multi pole relay includes: a base plate; several bimorphic elements each of elongate plate shape and including a central electrode of elongate plate shape, a pair of piezoelectric members of elongate thin plate shape arranged on opposite sides of the... | 03/31/1987 |
