Data processing: generic control systems or specific application – Specific application – apparatus or process – Article handling
Reexamination Certificate
2008-05-08
2011-12-13
Crawford, Gene (Department: 3651)
Data processing: generic control systems or specific application
Specific application, apparatus or process
Article handling
C700S245000, C700S250000, C701S050000, C701S001000, C269S329000
Reexamination Certificate
active
08078315
ABSTRACT:
A control system for a load-handling clamp includes first and second load-engaging surfaces for selectively gripping and releasing a load disposed between said surfaces. At least one of said surfaces is selectively movable toward the other by a hydraulic actuator. At least one fluid valve assembly variably regulates a maximum hydraulic clamping pressure capable of causing the actuator to move one of the surfaces toward the other in a load clamping movement. Preferably, a load geometry sensor produces an electrical effect that varies as a function of the geometric profile of the load. A data receiver preferably also obtains load identification information related to at least one characteristic of the load, other than the load's geometry. A controller, in response to the data receiver and load geometry sensor, operates to control the valve assembly's regulation of the maximum hydraulic clamping pressure. In order to prepare for the load clamping movement, the controller is preferably also capable of enabling the actuator to move one of said surfaces toward the other in an initial clamp closing movement at a maximum hydraulic closing pressure greater than the maximum hydraulic clamping pressure. Thereafter the controller enables the load clamping movement at a pressure level substantially no greater than the maximum hydraulic clamping pressure.
REFERENCES:
patent: 4423998 (1984-01-01), Inaba et al.
patent: 4714399 (1987-12-01), Olson
patent: 4726729 (1988-02-01), Olson et al.
patent: 4832341 (1989-05-01), Muller et al.
patent: 5330168 (1994-07-01), Enomoto et al.
patent: 5335955 (1994-08-01), Pekka et al.
patent: 5516255 (1996-05-01), Tygard
patent: 5604715 (1997-02-01), Aman et al.
patent: 5706408 (1998-01-01), Pryor
patent: 5984617 (1999-11-01), Seaberg
patent: 6332098 (2001-12-01), Ross et al.
patent: 6439826 (2002-08-01), Jordan et al.
patent: 7121457 (2006-10-01), Michal, III
patent: 7151979 (2006-12-01), Andersen et al.
patent: 2001/0039464 (2001-11-01), Hackauf
patent: 2003/0233184 (2003-12-01), Roncari
patent: 2004/0102870 (2004-05-01), Andersen et al.
patent: 2006/0115354 (2006-06-01), Prentice et al.
patent: 3801133 (1995-03-01), None
patent: 19964034 (2001-07-01), None
patent: 10005220 (2002-01-01), None
patent: 4433050 (2004-01-01), None
patent: 0995557 (2000-04-01), None
patent: 995557 (2000-04-01), None
patent: 1371601 (2003-12-01), None
patent: 1371601 (2003-12-01), None
patent: WO92/00913 (1992-01-01), None
patent: WO2008/040853 (2008-04-01), None
“UEX Appliance Clamp—VFC Volumetric Pressure Control,” 2003, pp. 1-4, Cascade Corporation, Portland, Oregon.
PCT International Search Report, International Application No. PCT/US2009/002127, pp. 1-4, Cascade Corporation, Portland, Oregon.
McKernan Pat S.
Nagle Greg A.
Cascade Corporation
Chernoff Vilhauer McClung & Stenzel LLP
Crawford Gene
Cumbess Yolanda
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