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:
Apr. 27, 2010
Filed:
Jun. 06, 2006
Henrikh Rojanskiy, Or Akiva, IL;
Avraham Ophir, Herzliya, IL;
Henrikh Rojanskiy, Or Akiva, IL;
Avraham Ophir, Herzliya, IL;
I.D.E. Technologies Ltd., Kadima, IL;
Abstract
A piston for a linear spool valve, the valve comprising a body having a inner surface. The body is made of a material with a relatively low heat expansion coefficient α. The piston comprises a contact member having an outer surface and being adapted to reciprocate within the body of the valve so that the outer surface is in contact with the inner surface. The contact member has at least a first layer made of a material with a heat expansion coefficient αessentially greater than α, i.e. α>>α, and at least a second layer made of a material with a heat expansion coefficient αclose to α. This causes the contact member to be adapted to behave, along said outer surface, as a material having a heat expansion coefficient essentially closer to αthan to α. One of the layers constitutes an outer layer of the contact member and comprises the outer surface.