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:
May. 15, 1990
Filed:
Mar. 23, 1988
Jay R Sorensen, Washington, OR (US);
SpaceLabs, Inc., Bothell, WA (US);
Abstract
A control system for a blood pressure monitor having a blood pressure cuff, an air pump for inflating the cuff, a pressure transducer measuring the air pressure in the cuff, and a bleed valve for selectively venting the blood pressure cuff to reduce the cuff pressure. The air pump leaks air when it is de-energized, thereby inadvertently leaking air from the blood pressure cuff when the air pressure in the cuff is to be maintained constant as an attempt is made to detect blood flow beneath the cuff. A two-way valve is placed in series with the air pump to isolate the air pump from the cuff when the pressure in the cuff is to be maintained constant. The two-way valve allows air to leak from the blood pressure cuff through the air pump when the cuff is to be vented. The two-way valve and the bleed valve thus provide redundant venting of the blood pressure cuff. The bleed valve and the two-way valve shift to their cuff-venting positions when they are de-energized so that the cuff is assured of venting in the event of a power loss in said monitor.