Mineral cutter picks and pick assemblies
US4624505A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 15, 1985 |
| Grant date | Nov 25, 1986 |
| Priority date | — |
| Expiry date | Jan 15, 2005 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21C35/187
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A mineral cutter pick is mounted in a holder. Passages in the pick and the holder supply fluid to an opening near the pick cutting edge. Sleeves are provided in the adjacent ends of the passages in the pick and holder and receive the opposite ends of a tubular connector. At least one of the sealing sleeves has its outer face exposed to the fluid supply pressure so that sealing with the associated end of the connector is assisted by the pressure force. The ends of the connector are formed as spherical enlargements to allow free pivoting in their sleeves and at least one end is axially displaceable in its sleeve while maintaining sealing contact.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.