Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Browse by Category: Main > Engineering
Class Information
Number: 405/259.2
Name: Hydraulic and earth engineering > Earth treatment or control > Rock or earth bolt or anchor > Frangible bolt
Description: Subject matter comprising a bolt having structure or a property such that it will break at a predetermined torque.










Patents under this class:

Patent Number Title Of Patent Date Issued
8690484 Sheathed cable Apr. 8, 2014
8434970 Breakable rock bolt May. 7, 2013
6637980 Method and apparatus for re-tensioning a roof bolt in an underground mine Oct. 28, 2003
6533503 Mortar composition, curable by frontal polymerization, and a method for fastening tie bars Mar. 18, 2003
5873689 Low torque threaded fastener and mine roof support system using such a fastener Feb. 23, 1999
5443332 Rockbolt tensioning Aug. 22, 1995
5352065 Rock bolting Oct. 4, 1994
5033909 Coupling for anchor rod and sleeve Jul. 23, 1991
4955758 Reinforcing method and means Sep. 11, 1990
4764055 Resin reinforced expansion anchor system Aug. 16, 1988
4750887 Anchor bolt assembly Jun. 14, 1988
4662795 Method of supporting a mine roof using nut element with breakable portion May. 5, 1987
4652179 Method of and device for severing a tension member in a prestressed grouted anchor Mar. 24, 1987
4618291 Nut member and mine roof support system incorporating same Oct. 21, 1986
4431348 Force transmission device Feb. 14, 1984
4193715 Mine roof support method and apparatus Mar. 18, 1980
4122681 Mine roof support assembly Oct. 31, 1978
4051683 Method and apparatus for supporting a mine roof Oct. 4, 1977
4023373 Anchor bolt assembly and utilization May. 17, 1977
3979918 Rock bolts Sep. 14, 1976











 
 
  Recently Added Patents
Scoring users of network based users
Voltage regulators with improved wake-up response
Distributive data capture
Stereoscopic editing for video production, post-production and display adaptation
Creating and manufacturing documents that initially exceed equipment finishing capacity
Automated hotfix handling model
Organic electroluminescence element
  Randomly Featured Patents
Lithographic apparatus and cleaning method therefor
Packaging container
CMOS input with Vcc compensated dynamic threshold
Combined canvas mesh holder and yarn strand receptacles
Solar module assembly
Method and device for adapting a chip card to different card terminals
Windows display method and apparatus for the left-handed mouse
Liquid crystal display and method of manufacturing the same
Atrial defibrillator and method providing dual reset of an interval timer
Device and method of monitoring an environmental parameter in real time