GB2383896A - Electro-active rotary devices - Google Patents

Electro-active rotary devices

Info

Publication number
GB2383896A
GB2383896A GB0303992A GB0303992A GB2383896A GB 2383896 A GB2383896 A GB 2383896A GB 0303992 A GB0303992 A GB 0303992A GB 0303992 A GB0303992 A GB 0303992A GB 2383896 A GB2383896 A GB 2383896A
Authority
GB
United Kingdom
Prior art keywords
elements
common axis
electro
around
active rotary
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
GB0303992A
Other versions
GB2383896B (en
GB0303992D0 (en
Inventor
Anthony Hooley
Gareth Mckevitt
Ursula Ruth Lenel
Mark Richard Shepherd
Richard John Topliss
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
1 Ltd
Original Assignee
1 Ltd
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
Priority claimed from GB0020944A external-priority patent/GB0020944D0/en
Priority claimed from GB0107694A external-priority patent/GB0107694D0/en
Application filed by 1 Ltd filed Critical 1 Ltd
Publication of GB0303992D0 publication Critical patent/GB0303992D0/en
Publication of GB2383896A publication Critical patent/GB2383896A/en
Application granted granted Critical
Publication of GB2383896B publication Critical patent/GB2383896B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
    • H02N2/10—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing rotary motion, e.g. rotary motors
    • 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
    • H10N30/204—Piezoelectric or electrostrictive devices with electrical input and mechanical output, e.g. functioning as actuators or vibrators using bending displacement, e.g. unimorph, bimorph or multimorph cantilever or membrane benders
    • H10N30/2041—Beam type
    • H10N30/2042—Cantilevers, i.e. having one fixed end
    • H10N30/2044—Cantilevers, i.e. having one fixed end having multiple segments mechanically connected in series, e.g. zig-zag type
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2217/00—Details of magnetostrictive, piezoelectric, or electrostrictive transducers covered by H04R15/00 or H04R17/00 but not provided for in any of their subgroups
    • H04R2217/01—Non-planar magnetostrictive, piezoelectric or electrostrictive benders

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Micromachines (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Abstract

An electro-active rotary device comprising a plurality of electro-active elements, each element being arranged to bend, on activation, to generate relative rotation of its ends, the elements being connected together by their ends in series, with each element extending between its ends around a common axis to bend around the common axis. The elements are arranged to combine the rotation generated by each element to produce a net relative rotation around the common axis between the elements at the ends of the series on activation of all the elements. In one type of embodiment, the device extends along the common axis with the elements arranged successively along the common axis. In another type of embodiment, the elements are curved around the common axis and nested together.
GB0303992A 2000-08-24 2001-08-24 Electro-active rotary devices Expired - Lifetime GB2383896B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB0020944A GB0020944D0 (en) 2000-08-24 2000-08-24 Electro-active rotary devices
GB0107694A GB0107694D0 (en) 2001-03-27 2001-03-27 Electro-active rotary device
PCT/GB2001/003833 WO2002017408A1 (en) 2000-08-24 2001-08-24 Electro-active rotary devices

Publications (3)

Publication Number Publication Date
GB0303992D0 GB0303992D0 (en) 2003-03-26
GB2383896A true GB2383896A (en) 2003-07-09
GB2383896B GB2383896B (en) 2004-02-25

Family

ID=26244902

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0303992A Expired - Lifetime GB2383896B (en) 2000-08-24 2001-08-24 Electro-active rotary devices

Country Status (3)

Country Link
AU (1) AU2001282348A1 (en)
GB (1) GB2383896B (en)
WO (1) WO2002017408A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2433174A (en) * 2005-12-07 2007-06-13 New Transducers Ltd Exciter for a bending wave distributed mode loudspeaker

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1945448A1 (en) * 1969-09-08 1971-03-11 Siemens Ag Piezoelectrically driven bending body, especially for clocks and relays
US3816774A (en) * 1972-01-28 1974-06-11 Victor Company Of Japan Curved piezoelectric elements
JPS5895710A (en) * 1981-12-03 1983-06-07 Oki Electric Ind Co Ltd Mirror deflector
JPH0449876A (en) * 1990-06-19 1992-02-19 Matsushita Electric Ind Co Ltd Angle regulator
WO2001047041A2 (en) * 1999-12-21 2001-06-28 1... Limited Electro-active devices

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1945448A1 (en) * 1969-09-08 1971-03-11 Siemens Ag Piezoelectrically driven bending body, especially for clocks and relays
US3816774A (en) * 1972-01-28 1974-06-11 Victor Company Of Japan Curved piezoelectric elements
JPS5895710A (en) * 1981-12-03 1983-06-07 Oki Electric Ind Co Ltd Mirror deflector
JPH0449876A (en) * 1990-06-19 1992-02-19 Matsushita Electric Ind Co Ltd Angle regulator
WO2001047041A2 (en) * 1999-12-21 2001-06-28 1... Limited Electro-active devices

Also Published As

Publication number Publication date
GB2383896B (en) 2004-02-25
AU2001282348A1 (en) 2002-03-04
WO2002017408A1 (en) 2002-02-28
GB0303992D0 (en) 2003-03-26

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Expiry date: 20210823