(12) United States Patent ao) Patent No.: us 6,696,653 Bi
Smith et al. (45) Date of Patent: Feb. 24,2004
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Primary Examiner—Elvin Enad
Assistant Examiner—K. Lee
(74) Attorney, Agent, or Firm—Fellers, Snider, Blankenship, Bailey & Tippens, PC.
The present invention relates generally to binary switches for use in the medical monitoring field and to methods for manufacturing same. More particularly, the instant invention involves the construction, manufacture, and operation of pressure sensitive patient monitors of the sort commonly used in medical settings to detect when a patient has, for example, exited a chair or a bed. In accordance with a preferred embodiment of the instant invention, an apparatus for patient monitoring is disclosed herein that contains one or more therein which resiliently collapse in response to weight, thereby completing an electrical circuit and indicating a presence or absence of a patient on the mat. Other preferred embodiments include hermetically sealed mats and methods of manufacturing same.
30 Claims, 11 Drawing Sheets