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:
Oct. 06, 1998
Filed:
Apr. 17, 1997
Candice B Kissinger, West Lafayette, IN (US);
Curtis E Bohs, West Lafayette, IN (US);
William F Schmidt, West Lafayette, IN (US);
Donnie A Evans, Dayton, IN (US);
Bioanalytical Systems, Inc., Indianapolis, IN (US);
Abstract
A movement-responsive system for conducting tests on freely-moving animals is disclosed. The invention includes a container for housing the animal, a mechanism for rotating the cage in response to rotational movement of the animal, and one or more test leads connected to the animal for performance of biomedical tests such as infusion, in vivo ultrafiltration, laser-doppler monitoring of blood flow, electrical stimulation, and in vivo microdialysis. The container is caused to rotate in the opposite (counter-rotation) direction of the sensed direction of rotation of the animal so that the one or more test leads do not become entangled, twisted, disconnected, or clamped. The rotating mechanism includes a simple, reliable sensor assembly including a pair of strategically placed, close-ended limit detectors which are activated by a triggering element, which is also a part of the sensor assembly. The sensor assembly is mounted on a counter-balanced arm which is responsive to upward and downward movements of the animal. No complex control system is required for the present invention, yet adjustment of the sensitivity of the rotating mechanism is easy to accomplish and may be performed by the average user of the apparatus. Further, the leads may all be continuous, thereby eliminating problems caused by the use of liquid swivels with independently rotating halves, or by commutator connectors.