Fluid reaction surfaces (i.e. – impellers) – Having positive means for impeller adjustment – Motor bodily rotatable with impeller hub or shaft
Reexamination Certificate
2011-01-25
2011-01-25
Nguyen, Ninh H (Department: 3745)
Fluid reaction surfaces (i.e., impellers)
Having positive means for impeller adjustment
Motor bodily rotatable with impeller hub or shaft
C416S15700A
Reexamination Certificate
active
07874801
ABSTRACT:
A device for measuring the displacement travel of a hydraulic displacement mechanism for blades of an impeller of an axial-flow fan, wherein the displacement mechanism includes as components a displacement cylinder and a piston rod having a piston, one of the components being axially displaceable and the other component not being axially displaceable. Respective spindles of the blades are secured to a displacement disk to which is connected the axially displaceable component of the displacement mechanism. An oil transfer element surrounds an extension of the piston rod that extends out of the displacement cylinder. A magnetostrictive displacement-measuring device that includes a sensor housing with a wave guide, sensor head, and an annular magnet is coupled to the displacement mechanism. The sensor housing and the sensor head are connected to the oil transfer element. Either the oil transfer element or one of the displacement mechanism components is axially displaceable relative to the other component. The magnet is connected to that component for which the axial displacement relative to the oil transfer element exists.
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Becker Robert W.
Nguyen Ninh H
Robert W. Becker & Associates
TLT-Turbo GmbH
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