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:
Aug. 01, 1995
Filed:
Dec. 30, 1993
Brett A Trimble, Del Mar, CA (US);
Camino Laboratories, Inc., San Diego, CA (US);
Abstract
Calibration apparatus and method for calibrating a movable pressure sensor include the use of a stop device to establish a reference position outside the sensing movement range of a first sensor. While in vitro, a reference pressure is established by applying pressure to the sensor to move it against the stop surface with a controllable pressure source. This reference pressure is stored. During use when the sensor is in an unknown position, such as when in vivo, the controllable pressure source applies pressure to move the sensor against the stop surface and the pressure required to do so is measured. The measured pressure is compared to the reference pressure to determine the unknown pressure and the system is then recalibrated. An optical system may be used as a second sensor to determine the position of the first sensor. Inner and outer housings in which the first sensor and stop surface are mounted are moved in relation to each other and the optical sensor during assembly of the calibration system to accurately and independently calibrate the first and optical sensors.