Area comparison gage
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United States of America Patent
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-
Apr 27, 1982
Grant Date -
N/A
app pub date -
Sep 10, 1980
filing date -
Sep 10, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A gage for directly measuring the deviation in cross sectional area of a passage from a nominal value employs a hydraulic system having pistons operatively engaged therewith. The pistons move in response to movement of passage contacting finger elements and the hydraulic system responds to piston movement to generate a measure of the passage area. At least one set of the finger elements has rotatable passage contacting members, each member having an elongated passage contacting surface. Each member rotates about a respective axis positioned to keep the center of each contact surface in a fixed position relative to the finger. Stop means are provided by fixed outboard finger elements, juxtaposed opposite movable finger elements, for providing improved stability for positioning the comparison gage.
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