Cartridge for use in anchor bolting
US4395162A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 25, 1981 |
| Grant date | Jul 26, 1983 |
| Priority date | — |
| Expiry date | Jun 25, 2001 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B13/143
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Reinforcing or fixing elements such as anchor bolts are anchored in a borehole drilled in a substrate such as an underground mine roof with an anchoring cartridge in which a particulate liquid-settable solid component, for example a hydraulic cement, is contained in a liquid-impermeable casing, the solid occupying a volume which is less than the normal free volume of the casing and the cartridge being at least partially evacuated so as to cause the casing to be in contact with the solid component over substantially its whole length within the casing. This ensures that when the cartridge is immersed in an activating liquid, for example water, and the casing perforated, the activating liquid is drawn rapidly into the evacuated space adjacent the solid component over its whole length thereby helping to ensure the formation of a self-setting grouting composition of uniform strength when the cartridge is used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.