Monitor to check the path of motion of reciprocating piston
AssigneeHoerbiger Kompressortechnik Services GmbH
InventorsBernhard Spiegl, Peter Steinrück, Jürgen Murhammer
Life of this patent
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Abstract
A stationary arranged sensor (4) is provided in the region of one of the dead centers of the piston movement to monitor the position of the path of motion of a piston (1) relative to a cylinder (2) whereby the sensor (4) measures the lateral distance (a) to an indicator unit (6) arranged on the piston (1). The sensor (4) is arranged in a recessed position relative to the inner surface of the cylinder (2) and is sealed toward the cylinder chamber (9) by means of a cover (8), and the indicator unit (6) on the piston (1) is designed as an anomaly (10) that is non-sensitive to contaminating deposits in the area of the face (11) of the piston (1).
Claims18
A combination of a cylinder, a piston which moves in reciprocating fashion within an interior of the cylinder along a path of motion between a lower dead end and an upper dead end, and a monitoring apparatus for detecting variations in said path of motion over time due to wear;
- said monitoring means comprising an indicator means at an end face of said piston, a sensor means recessed within said cylinder so as to be offset by a lateral distance “a” from said indicator means, and a cover means which seals said sensor means relative to the interior of said cylinder, said sensor means detecting wear by sensing changes in said lateral distance “a” over time.
Dependencies are inferred from the claim text.