Valves and valve actuation – Permanent or constantly energized magnet actuator
Reexamination Certificate
2006-07-04
2006-07-04
Yu, Justine R. (Department: 3751)
Valves and valve actuation
Permanent or constantly energized magnet actuator
C251S129040, C251S129080, C251S129150, C137S554000
Reexamination Certificate
active
07070161
ABSTRACT:
The invention provides a proportional directional control valve having a valve operating mechanism that permits communication between a first and a second channel through a linear motion of a valve element of the valve operating mechanism, a magnetic assembly operatively connected to the valve element where the magnetic assembly provides a magnetic field responsive to the linear motion of the valve element, a linear Hall-effect sensor assembly configured to generate an electrical signal responsive to a change in the magnetic field, and a control system that controls the linear movement of the valve element in response to a comparison of the electrical signal and a command electrical input signal. The valve operating mechanism includes a valve assembly configured with a chamber housing the valve element. The linear motion of the valve element within the chamber allows fluid to be selectively conveyed through channels of the valve assembly.
REFERENCES:
patent: 4121610 (1978-10-01), Harms et al.
patent: 4526201 (1985-07-01), Geyler, Jr. et al.
patent: 4970941 (1990-11-01), Reinhardt
patent: 5197508 (1993-03-01), Gottling et al.
patent: 5538220 (1996-07-01), LaMarca
patent: 5806565 (1998-09-01), Kadlicko
patent: 6178956 (2001-01-01), Steinmann et al.
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www.micronas.com/products/overview/sensors/index.php “Sensor System Overview and System Solutions” Oct. 8, 2003 (16 pages long).
www.allegromicro.com/hall “Hall-Effect Sensors” Oct. 8, 2003 (2 pages long).
Piehl Travis Raymond
Wold Kermit Anthony
Barnes & Thornburg LLP
Continental Hydraulics
deVore Peter
Donovan Thomas J.
Yu Justine R.
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