Patent · US Expired

Method of bonding roofbolt rods to boltholes

US4497595A · kind A · utility

2Cited by

5References

11Claims

0Family size

Assignee

Bergwerksverband GmbH · DE

Inventors

Frank Meyer · Essen, DE
Wolfgang Cornely · Gladbeck, DE
Hans Mehesch · Essen, DE

Key dates

Filing date	Jan 10, 1983
Grant date	Feb 5, 1985
Priority date	—
Expiry date	Jan 10, 2003

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16B13/143
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A procedure of bonding roofbolt rods to boltholes whereby the roofbolt rod is pushed under rotating movements into a bolthole filled with an adhesive mass consisting of a mix by whose reaction is obtained polyurethane, characterized in that a mass consisting of polyisocyanate-prepolymerides is used which has been prepared from polyisocynates and one or more bifunctional polyols in a molecular weight range between 800 and 5,000, preferably between 1,200 and 3,000, and which reacts in the borehole with 1 to 25% by weight (related to the mass) of water and/or polyols serving as the hydroxyl component.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.