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:
Jul. 24, 1990
Filed:
Sep. 19, 1988
Sadahiko Mushika, Ichinomiya, JP;
Akira Suzuki, Nishio, JP;
Aisin Seiki Kabushiki Kaisha, Aichi, JP;
Kabushiki Kaisha Shinsangyokaihatsu, Tokyo, JP;
Abstract
Apparatus for driving a medical appliance has a single compressor for generating both the positive and negative pressures. The switching valves are connected to the outlet and inlet terminals of the compressor. The outlet and inlet terminals of the compressor are also connected to the positive pressure accumulator and the negative pressure accumulator, respectively. The apparatus has the pressure sensors to sense the pressures in the positive and negative pressure accumulators. When the pressure in the accumulator reaches a set pressure, at least one of the switching valves is closed. The apparatus further has the relief valves connected to the outlet and inlet terminals of the compressor. These relief valves open when the pressures of the compressor become excessive.