The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 23, 2007
Filed:
Sep. 26, 2002
Richard Topliss, Cambridge, GB;
David Livingstone, Hertfordshire, GB;
Andrew Matheson, Belmont, MA (US);
Gareth Mckevitt, Cambridge, GB;
Mark Richard Shepherd, Hertfordshire, GB;
Anthony Hooley, Cambridge, GB;
Richard Topliss, Cambridge, GB;
David Livingstone, Hertfordshire, GB;
Andrew Matheson, Belmont, MA (US);
Gareth McKevitt, Cambridge, GB;
Mark Richard Shepherd, Hertfordshire, GB;
Anthony Hooley, Cambridge, GB;
1. . . Limited, Cambridge, GB;
Abstract
An equivalent to the spatial separation either side of a nominal median plane that is inherent in a bimorph (with one piezoelectric layer on one side, and the second on the other side of the plane) is attained by structurally shaping the cross-section of a simple, single piezoelectric layer () such that it has a multiplicity of piezoelectric portions arranged in two generally-planar groups one either side of a median plane, so that any dimension change undergone by a portion on one side of that plane will tend to bend the whole device in the opposite direction to the same sense dimension change undergone by a portion on the other side of that plane. The simple, single layer acts as though it were a bimorph if elongate and beam-like, bending along its length, one end moving up/down, or back/forth, relative to the other but with any need for an internal, electrode.