Measuring and testing – Volume or rate of flow – Using differential pressure
Patent
1996-03-28
1998-11-17
Chilcot, Richard
Measuring and testing
Volume or rate of flow
Using differential pressure
12820523, G01F 124
Patent
active
058379045
ABSTRACT:
A method of preventing the inserting of a wrong flowmeter tube into an anesthesia machine comprises the steps of forming a selected number of longitudinal ridges at selected places on the inside surface of an upper portion of a flowmeter tube, attempting to insert the upper end portion into a socket pin mounted on the housing of a anesthesia machine, seating the tube on the socket pin if the socket pin exterior surface has grooves corresponding to the number and placement of ridges on the flowmeter tube, and rejecting the tube by the socket pin if the socket pin exterior surface does not have grooves corresponding to the number and placement of the ridges on the flowmeter tube, since the lack of said correspondences indicates that the tube is the wrong tube for the socket pin. A flowmeter measuring tube for medical applications such as anesthesia machines has a selected number of ridges extending inwardly from the inside surface of the flowmeter tube from an upper end portion, said number of ridges being adapted to slide into a like number and position of grooves in a socket pin of a housing of an anesthesia machine for holding the tube in place, whereby the ridges of the flowmeter tube and the grooves of the socket pin provide a safety feature that prevents the insertion of the wrong tube into the socket pin.
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Blueprint entitled "Tube Indexing Backplate Assembly for a Gas Flowmeter", Porter Instrument Company, Inc. (1976).
A. Earley John F.
A. Earley III John F.
Amrozowicz Paul D.
Chilcot Richard
Porter Instrument Company, Inc.
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