Appeal No. 2001-1343
Application No. 08/965,818
Of particular interest is the fluid switching embodiment
shown in Figure 4. Although the reference numerals in Figure
4 do not match those used in the underlying description (see
column 4, line 57 et seq.), it is readily apparent that this
embodiment includes a low torque, fluid-driven rotary motor
20, a high torque, fluid-driven motor 40, a first pair of
flowlines for transmitting fluid between a source of
pressurized fluid and the low torque motor, a second pair of
flowlines for transmitting fluid between the source of
pressurized fluid and the high torque motor, and a valve
member (referenced by numeral 65 in Figure 4) activated by
fluid pressure for diverting fluid from the first pair of
flowlines to the second pair of flowlines when there is a
change in torque conditions to a preselected high-torque value
that defines the high torque condition, wherein fluid flow is
automatically diverted from the low torque motor to the high
torque motor by fluid pressure activation of the valve member
above the preselected high torque value.
The test for obviousness is not whether the features of a
secondary reference may be bodily incorporated into the
structure of the primary reference; nor is it that the claimed
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