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. 10, 1977
Filed:
Jul. 16, 1974
Applicant:
Inventor:
Glenn A Meyer, Brookfield, WI (US);
Assignee:
Hittman Corporation, Columbia, MD (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61B / ;
U.S. Cl.
CPC ...
128 / ; 73393 ; 73406 ; 128 / ; 128 / ; 250336 ;
Abstract
A pressure sensor apparatus primarily for sensing pressure in a body cavity such as the cranium, bladder or vena cava of an animal or human comprising a housing having a diaphragm dividing the interior of the housing into two chambers. A member containing filter material is connected to the housing and communicates with one of the chambers formed in the housing. The other chamber contains radioactive fluid and is connected to a variable volume chamber that receives a volume of radioactive fluid which is proportional to the pressure sensed by the flexible member. A radiation detector senses the volume of radioactive fluid in the variable volume chamber.