Appeal No. 1997-2162
Application 08/280,430
in col. 6, lines 15 through 25 also provides for an emergency
switch that permits the release of the hydraulic for lowering
the platform in case of an emergency power failure. Shah
teaches the control circuits for lowering and raising the jack
in an elevator. Grove, in addition to the analysis made in
regard to claim 7 above, in col. 5, lines 22 through 47
teaches that in the event of a power failure, the battery 64
provides power to a portion of the control circuit for
emergency lowering of the elevator. The power from the
battery causes the down-slow valve 46a to be actuated which
permits the car to descend slowly to a reference floor so that
the occupants can exit.
We find that Grove is concerned with providing a backup
battery for an elevator that supplies power to the control
system for lowering the elevator car in the event of power
failure. The problem of AC power failure is also present in
the mobile lifting device of Gary where an emergency switch
lowers the platform. Therefore, the safety of the elevator
user during an AC power failure provides sufficient suggestion
or desirability to combine Grove's DC battery with the mobile
lift of Gary and Shah so that the car can be lowered slowly
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