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:
Nov. 21, 1978
Filed:
Mar. 20, 1978
Joe A Porter, Whittier, CA (US);
Allen F Dageforde, Orange, CA (US);
Uniloc, Inc., Irvine, CA (US);
Abstract
The present invention is directed to a means for compensating for pressure changes in sensing devices. To assure accurate measurements with sensing devices immersed in a medium, it is necessary to have external and internal pressures preferably the same or very close. This invention provides pressure compensation through the use of at least one but preferably a plurality of passages communicating the exterior to the interior of the cell. The passage preferably but not necessarily is so designed as to provide an inner portion of the passage with a greater dimension than the remainder. In the greater dimensioned portion of the passage is positioned a substantially non-tensioned membrane so as to provide a separation or barrier between the interior and exterior of the cell.