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Class Information
Number: 310/339
Name: Electrical generator or motor structure > Non-dynamoelectric > Piezoelectric elements and devices > With mechanical energy coupling means > Voltage, spark or current generator
Description: Subject matter wherein mechanical energy from an external source is applied to the piezoelectric element to produce an electric potential difference between at least two electrically accessible points on the surface of the element.










Patents under this class:
1 2 3 4 5 6 7 8 9 10 11 12

Patent Number Title Of Patent Date Issued
5132583 Piezoresistive material, its preparation and use Jul. 21, 1992
5115162 Actuation responsive brake pedal pad assembly May. 19, 1992
5092243 Propellant pressure-initiated piezoelectric power supply for an impact-delay projectile base-mounted fuze assembly Mar. 3, 1992
5072076 Tablet digitizer with untethered stylus Dec. 10, 1991
5065067 Piezoelectric circuit Nov. 12, 1991
5059852 Piezoelectric mechanism for gas lighters Oct. 22, 1991
5055733 Method for converting micromotions into macromotions and apparatus for carrying out the method Oct. 8, 1991
5053672 Energy converter apparatus Oct. 1, 1991
5049776 Apparatus for detecting rotation Sep. 17, 1991
5039901 Electric power source through steam transition Aug. 13, 1991
5034648 Dual direction switch Jul. 23, 1991
5029873 Method to detect impacts for a toy or game Jul. 9, 1991
5028808 Devices capable of sensing rotary motion Jul. 2, 1991
5014062 Electronic projectile impact spotting device May. 7, 1991
4975616 Piezoelectric transducer array Dec. 4, 1990
4952836 Piezoelectrostatic generator Aug. 28, 1990
4943752 Piezoelectric incandescent lamp test device Jul. 24, 1990
4922268 Piezoelectric detector for drop position determination in multi-pen thermal ink jet pen printing systems May. 1, 1990
4912355 Superlattice strain gage Mar. 27, 1990
4904894 Hail sensor Feb. 27, 1990
4905107 Torsion transducer for magnetic storage disk drives Feb. 27, 1990
4896069 Piezoelectric switch Jan. 23, 1990
4889991 Gamma radiation detector with enhanced signal treatment Dec. 26, 1989
4888991 Relative motion sensor Dec. 26, 1989
4870314 Cam-actuated piezoelectric ignition device for gas appliance Sep. 26, 1989
4868447 Piezoelectric polymer laminates for torsional and bending modal control Sep. 19, 1989
4868566 Flexible piezoelectric switch activated metering pulse generators Sep. 19, 1989
4857887 Laminated piezoelectric keyboard Aug. 15, 1989
4853580 Piezoelectric pulse generator Aug. 1, 1989
4849668 Embedded piezoelectric structure and control Jul. 18, 1989
4843951 Servocylinder with an electric piston stroke limiting switch Jul. 4, 1989
4843275 Air buoyant piezoelectric polymeric film microphone Jun. 27, 1989
4823802 Device for measurement of arterial blood pressure Apr. 25, 1989
4820236 Doll with sensing switch Apr. 11, 1989
4814661 Systems for measurement and analysis of forces exerted during human locomotion Mar. 21, 1989
4780638 Method and system for the production of electrical energy by means of a pressure medium Oct. 25, 1988
4767967 High voltage generating device Aug. 30, 1988
4761582 Dual mode transducer Aug. 2, 1988
4748366 Novel uses of piezoelectric materials for creating optical effects May. 31, 1988
4733121 Solid state heat to electricity converter Mar. 22, 1988
4723087 Piezoelectric impact sensor Feb. 2, 1988
4706069 Security system Nov. 10, 1987
H372 Piezoelectric charging device Nov. 3, 1987
4691117 Switch device Sep. 1, 1987
4691136 Insulator assembly for electrode of piezoelectric ignition device Sep. 1, 1987
4675569 Touch screen mounting assembly Jun. 23, 1987
4668945 Detector of bubbles in blood May. 26, 1987
4651045 Electromagnetically interference-proof flight control device Mar. 17, 1987
4634917 Active multi-layer piezoelectric tactile sensor apparatus and method Jan. 6, 1987
4633122 Means for electrically connecting electrodes on different surfaces of piezoelectric polymeric films Dec. 30, 1986

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