WO2002103817A3 - Piezoelectric torsional devices - Google Patents

Piezoelectric torsional devices Download PDF

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Publication number
WO2002103817A3
WO2002103817A3 PCT/GB2002/002768 GB0202768W WO02103817A3 WO 2002103817 A3 WO2002103817 A3 WO 2002103817A3 GB 0202768 W GB0202768 W GB 0202768W WO 02103817 A3 WO02103817 A3 WO 02103817A3
Authority
WO
WIPO (PCT)
Prior art keywords
elements
piezoelectric
shear
devices
disclosed
Prior art date
Application number
PCT/GB2002/002768
Other languages
French (fr)
Other versions
WO2002103817A2 (en
Inventor
Gareth Mckevitt
Anthony Hooley
David Henry Pearce
Ursula Ruth Lenel
Mark Richard Shepherd
Original Assignee
1 Ltd
Gareth Mckevitt
Anthony Hooley
David Henry Pearce
Ursula Ruth Lenel
Mark Richard Shepherd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 1 Ltd, Gareth Mckevitt, Anthony Hooley, David Henry Pearce, Ursula Ruth Lenel, Mark Richard Shepherd filed Critical 1 Ltd
Priority to GB0400609A priority Critical patent/GB2393573B/en
Priority to AU2002257991A priority patent/AU2002257991A1/en
Publication of WO2002103817A2 publication Critical patent/WO2002103817A2/en
Publication of WO2002103817A3 publication Critical patent/WO2002103817A3/en

Links

Classifications

    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/20—Piezoelectric or electrostrictive devices with electrical input and mechanical output, e.g. functioning as actuators or vibrators
    • H10N30/208—Piezoelectric or electrostrictive devices with electrical input and mechanical output, e.g. functioning as actuators or vibrators using shear or torsion displacement, e.g. d15 type devices

Landscapes

  • General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
  • Micromachines (AREA)

Abstract

A piezoelectric device comprising a plurality of elements (1) of piezoelectric material operable in shear mode to cause shear between two opposed surfaces of the element. The elements (1) are coupled such that the shear of the elements causes torsion in the device. Several different arrangements for a group of elements (10, 30, 50) to cause such torsion are disclosed. Several devices (20, 40, 60, 70) which utilise the groups of elements as torsional actuators in series are also disclosed. In these devices, the torsional actuators formed by the elements of piezoelectric material operable in shear mode may be replaced by other piezoelectric torsional actuators.
PCT/GB2002/002768 2001-06-20 2002-06-19 Piezoelectric torsional devices WO2002103817A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB0400609A GB2393573B (en) 2001-06-20 2002-06-19 Piezoelectric devices
AU2002257991A AU2002257991A1 (en) 2001-06-20 2002-06-19 Piezoelectric torsional devices

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0115063.0 2001-06-20
GBGB0115063.0A GB0115063D0 (en) 2001-06-20 2001-06-20 Piezoelectric devices

Publications (2)

Publication Number Publication Date
WO2002103817A2 WO2002103817A2 (en) 2002-12-27
WO2002103817A3 true WO2002103817A3 (en) 2003-10-30

Family

ID=9916992

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2002/002768 WO2002103817A2 (en) 2001-06-20 2002-06-19 Piezoelectric torsional devices

Country Status (3)

Country Link
AU (1) AU2002257991A1 (en)
GB (2) GB0115063D0 (en)
WO (1) WO2002103817A2 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3900748A (en) * 1972-01-31 1975-08-19 Zenith Radio Corp Torsional ceramic transducer
WO1992001955A1 (en) * 1990-07-16 1992-02-06 Atlantic Richfield Company Torsional force transducer and method of operation
EP0908961A1 (en) * 1997-10-13 1999-04-14 Sfim Industries Amplifier actuator of active materials
US6222306B1 (en) * 1998-12-07 2001-04-24 Sfim Industries Actuators of active piezoelectric or electrostrictive material

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5321333A (en) * 1993-04-06 1994-06-14 The United States Of America As Represented By The Secretary Of The Navy Torsional shear wave transducer
US6020674A (en) * 1997-10-31 2000-02-01 The Penn State Research Foundation Torsional electrostrictive actuators

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3900748A (en) * 1972-01-31 1975-08-19 Zenith Radio Corp Torsional ceramic transducer
WO1992001955A1 (en) * 1990-07-16 1992-02-06 Atlantic Richfield Company Torsional force transducer and method of operation
EP0908961A1 (en) * 1997-10-13 1999-04-14 Sfim Industries Amplifier actuator of active materials
US6268682B1 (en) * 1997-10-13 2001-07-31 Sfim Industries Amplified active-material actuators
US6222306B1 (en) * 1998-12-07 2001-04-24 Sfim Industries Actuators of active piezoelectric or electrostrictive material

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
JIAO B L ET AL: "Torsional modes in piezo helical springs", IEEE TRANSACTIONS ON ULTRASONICS, FERROELECTRICS AND FREQUENCY CONTROL, vol. 46, no. 1, January 1999 (1999-01-01), pages 147 - 151, XP002237297, ISSN: 0885-3010 *

Also Published As

Publication number Publication date
GB2393573B (en) 2004-12-22
GB2393573A (en) 2004-03-31
GB0400609D0 (en) 2004-02-11
GB0115063D0 (en) 2001-08-15
AU2002257991A1 (en) 2003-01-02
WO2002103817A2 (en) 2002-12-27

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