G - Physics – 01 – L
Patent
G - Physics
01
L
358/5
G01L 7/00 (2006.01) G01L 11/00 (2006.01)
Patent
CA 1057424
ABSTRACT OF THE DISCLOSURE The present invention provides a pressure sensor apparatus for indicating pressure in the human body, particularly intracranial pressure, comprising a housing, bellows supported within said housing, wherein said bellows defines a first chamber and a second chamber within said housing, a fluid filled within said first and second chambers, means for placing said first chamber in communication with said pressure to be sensed so that said pressure will cause said bellows means to contract and expand, means contained within said housing for communicating the contraction and expansion movement of said bellows means, said communication means having at least two components, the first of said two components being operatively connected to said bellows and movable therewith when said bellows expands and contracts, the second of said two components positioned within said first chamber and being operatively associated with said first component but not movable with said bellows so that the relative movement of said first component with respect to said second component varies as a function of said pressure, said communication means being adapted to being sensed by a sensor means located at a remote position from said housing and free of any physical interconnection with said housing for sensing the relative position of said first and second components to provide data indicative of said pressure. In a preferred embodiment, the first and second components are provided by a radioactive source and an associated shield, the radioactive output varying as a function of the relative positions thereof.
232094
Fleischmann Lewis W.
Hayes William H. (jr.)
Hittman Fred
Lyon Warren C.
Meyer Glenn A.
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