Appeal No. 2001-1343
Application No. 08/965,818
the makeup or removal process” (specification, page 1).
Representative claim 77 reads as follows:
77. An improved torque wrench system for installing or
removing threaded bolt or nut members, the system comprising:
a) a wrench body that includes first and second end
portions, a drive head on the first end portion of the body;
b) a high torque wrench operatively connected to the
drive head for engaging and rotating a threaded bolt or nut
member at a first rotational speed under a high-torque
condition;
c) the high-torque wrench including a hydraulic cylinder
attached to the wrench body and extending to the first end
portion, the cylinder having a piston with an extendable push
rod that rotates the drive head under the high-torque
condition for rotation which can exceed one revolution of the
drive head;
d) a low-torque fluid driven rotary motor that rotates
the drive head under a low-torque condition and at a second
rotational speed that is at a higher rotational speed than the
rotational speed that the high-torque wrench rotates the drive
head;
e) a source of pressurized fluid that drives the low-
torque motor during the low-torque condition, and the high-
torque wrench under the high-torque condition;
f) a first pair of flowlines for transmitting fluid
between the source of pressurized fluid and the low-torque
motor;
g) a second pair of flowlines for transmitting fluid
between the source of pressurized fluid and the high torque
wrench;
2
Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Next
Last modified: November 3, 2007