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:
Mar. 24, 1987
Filed:
Sep. 18, 1985
Henry G Mohr, Carthage, MO (US);
Other;
Abstract
A leveling device includes a first and second pressure cell that are interconnected by lengths of fluid filled, flexible tubing. Each of the pressure cells is associated with a strain gauge for sensing the differential pressure of the fluid between a region associated with each of the tubing lengths. An indicating means associated with the strain gauges indicates, in response to a differential in fluid pressure sensed by the strain gauges, the elevation of either of the pressure cells relative to the position of the other cell. In one form of the invention, provision of a single tubing conduit between the strain gauges reduces the probability of erroneous measurements due to pressure fluctuations within the tubing. In alternate forms of the invention, an agitating means is associated with flexible bellows structure coupled to the tubing so that hysteresis of the fluid is substantially reduced.