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:
Jun. 13, 2000
Filed:
May. 10, 1999
Gregory Raymond Jokela, Ojai, CA (US);
Stanley Alfred Black, Ventura, CA (US);
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Abstract
A magnetotrictive peristaltic pump transfers a fluid from a supply chamber o a receiving chamber. The pump has a housing and a core section mounted within the housing. The core section is fabricated from a magnetostrictive material such as Terfenol-D, which can be made to expand directionally in the presence of a magnetic field. There is a fluid tight seal between the inner surface of the housing and the outer surface of the core section. Wrapped around the outer surface of the housing are a plurality of electrical coils. The positive terminal and the negative terminal of each coil are connected to a signal generator which generates direct current electrical signals to sequentially energize each coil. Energizing any one of the coils creates a magnetic field in the general area of the coil. In the presence of this magnetic field, the core section expands longitudinally resulting in lateral/radial shrinkage of the core section which creates a cavity in the general area of the magnetic field. The signal generator sequentially energizes the coils to move the cavity and the fluid contained therein from the supply chamber to the receiving chamber.