Chemistry: physical processes – Physical processes – Crystallization
Patent
1986-11-25
1988-09-27
Chapman, John
Chemistry: physical processes
Physical processes
Crystallization
411 10, F16B 3102
Patent
active
047732725
ABSTRACT:
An apparatus and method for measuring bolt tension in situ is disclosed. In one embodiment, a tab (12) is disposed in a radial groove (42) in a washer (10) with the proximal end (46) of the tab (12) secured in the groove (42). When the washer (10) is incorporated in a bolt assembly and the bolt (14) is tightened, the distal portion (48) of the tab (12) deflects. By measuring the force required to return the distal portion (48) of the tab (12) to its undeflected position, actual bolt tension can be determined. The tab may, instead, be incorporated in the bearing surface of a bolt head (306) or nut (406).
REFERENCES:
patent: 3104645 (1963-09-01), Harrison
patent: 4131050 (1978-12-01), Holmes
patent: 4164164 (1979-08-01), Trungold
patent: 4303001 (1981-12-01), Trungold
patent: 4483648 (1984-11-01), Trungold
Electronic Fastener Monitoring: Ensuring the Grip, Assembly Engineering, Apr. 1984, pp. 31-33.
Avoiding Failure in Bolted Joints, Machine Design, May 20, 1982, pp. 79-82.
Tools for Reliable Fastening, Assembly Engineering, Feb. 1982, pp. 26-31.
Fastener Tension Control--What It's All About, Assembly Engineering, Nov. 1976, pp. 22-30.
Data Management Technology of the Treaded Fastening Process, Fastener Technology, Aug. 1984, pp. 23-27.
PLI Washers, Preload Indicating, SPS Technologies Product Brochure.
Here's How to Use Load Indicator Washers, Bethlehem Steel Corporation Brochure.
The Load Indicator Bolt, Bethlehem Steel Corporation Product Brochure.
Guard-Nut Torque Limiter, Guard-Nut Product Brochure, May 1980.
RotaBolt Load Controlling Fasteners, Thomas Register 1985, Peterson Industries, Inc.
Chapman John
Raevis Robert R.
LandOfFree
Apparatus and method for measuring bolt tension in situ does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method for measuring bolt tension in situ, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for measuring bolt tension in situ will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2392529