Appeal 2006-2825
Application 10/691,916
Appellants invented “a braking device for industrial trucks by means
of which the vehicle can be automatically braked if a malfunction of vehicle
operation occurs, independently of the usual braking action” (Specification
1:26-28). By way of example, Appellants point out that a vehicle equipped
with an electric steering mechanism can no longer be steered if a power
failure or other trouble occurs; in such cases, some means must be provided
to ensure that the vehicle is braked in a controlled manner (Specification
1:18-25). Claim 1 is representative of the claimed invention and reads as
follows:
1. A braking device for an industrial truck,
comprising a first hydraulic brake cylinder which
is coupled with an actuation member and which is
in fluid communication with a hydraulic brake of
the truck through a braking conduit, a second
hydraulic braking cylinder, and an electrical device
supplied with electric current, the braking conduit
being led to a hydraulic brake of at least one wheel
of the industrial truck, the second braking cylinder
being also connected to the hydraulic braking
conduit, the second braking cylinder being
actuable by an electric magnet, and an emergency
stop device being provided which responds to the
omission of the electric current, the emergency
stop device supplying a braking signal to the
electric magnet for the actuation of the second
hydraulic braking cylinder in case of omission of
the current.
The Examiner relies upon the following as evidence of
unpatentability:
Toomey US 3,765,729 Oct. 16, 1973
Kessler US 6,079,792 Jun. 27, 2000
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