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. 06, 1999
Filed:
Nov. 29, 1996
Alonzo C Aylsworth, Glencoe, MO (US);
Gregory R Miller, Chesterfield, MO (US);
Other;
Abstract
A therapeutic gas delivery device includes a monitor having an inlet and an outlet, a source of therapeutic gas in fluid communication with the monitor inlet, and a gas delivery tube in fluid communication with the monitor outlet. The monitor includes a control valve having a normally open port, a normally closed port, and a common port. The common port is connected to the monitor outlet over a gas line and the normally open port and normally closed port are connected to the monitor inlet and atmosphere. The valve is switchable between a first position wherein the therapeutic gas passes through the monitor and a second position wherein atmospheric air or gas passes through the monitor. A flow sensor is placed in the gas line to measure the flow of gas through the second line and produces a signal indicative of the flow of gas through the gas line. A sensor by-pass tube extends around the flow sensor to allow a predetermined portion of the gas to by-pass the flow sensor. A computer is operatively connected to the flow sensor. The computer may be programmed to control the switching of the control valve in response to signals received from the flow sensor.