Measuring and testing – Dynamometers – Responsive to torque
Patent
1997-03-28
1998-08-11
Biegel, Ronald L.
Measuring and testing
Dynamometers
Responsive to torque
B25B 23145
Patent
active
057929670
ABSTRACT:
A system for tightening a threaded fastener with a hydraulic wrench has a pumping unit which measures parameters representative of the torque applied to the fastener and the angle of advance of the fastener, remote from the wrench. The pump measures pressure as a parameter representative of torque and measures, pump speed as a parameter which is processed so as to be representative of the angle of advance of the fastener. A ratchet-type hydraulic wrench is used, and the pressure versus angle data produced in tightening a fastener is manipulated to discard irrelevant portions and smooth relevant portions to provide data representative of torque and angle during the tightening process from which to determine a final stopping parameter for terminating tightening. The system also has a calibration fixture for determining the volumetric rate of angle advance for a given wrench. Any tightening methodology dependent upon angle may be used to practice the invention, or the invention may be applied to monitor the tightening process.
REFERENCES:
patent: 3847507 (1974-11-01), Sakiyama et al.
patent: 4104778 (1978-08-01), Vliet
patent: 4106176 (1978-08-01), Rice et al.
patent: 4131393 (1978-12-01), Magnussen, Jr.
patent: 4137800 (1979-02-01), Austin
patent: 4326837 (1982-04-01), Gilson et al.
patent: 4361945 (1982-12-01), Eshghy
patent: 4715786 (1987-12-01), Wolff et al.
patent: 4768388 (1988-09-01), Fader et al.
patent: 4791838 (1988-12-01), Bickford et al.
patent: 4823616 (1989-04-01), Tambini
patent: 4864903 (1989-09-01), Bickford et al.
patent: 4941362 (1990-07-01), Tambini
patent: 4961035 (1990-10-01), Inaba et al.
patent: 4992715 (1991-02-01), Nakamura et al.
patent: 5160244 (1992-11-01), Kuwabara et al.
patent: 5315501 (1994-05-01), Whitehouse
patent: 5443587 (1995-08-01), Takizawa
RS Technologies, Ltd.; "Bolted Joints: Fundamentals of Torque-Turn Tightening"; 1995.
Enerpac.RTM./Plarad Power Wrench; Torque Wrench Systems; "Hydraulic Torque Wrenches"; 1993.
Knutson Dale A.
Miller Douglas P.
Steber George R.
Applied Power Inc.
Biegel Ronald L.
LandOfFree
Pumping unit with speed transducer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Pumping unit with speed transducer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pumping unit with speed transducer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-390972