Grease filling arrangement in a cutter for a boring head
US7445062B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 14, 2007 |
| Grant date | Nov 4, 2008 |
| Priority date | — |
| Expiry date | Sep 14, 2027 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/24
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An arrangement for replenishing lubricating grease in drill cutters (3) that include a conical outer barrel (7) which is rotatable about a shaft (5) disposed centrally in the cutter, wherein there is provided in the cutter shaft (5) a passageway (16) that extends along the shaft from the cutter end of largest diameter and that connects with a transverse passageway (18) which opens into a bearing-accommodating space (13) in the cutter for delivering lubricating grease to the space (13), and wherein a lubricating nipple (19) is provided on the cutter end wall of largest diameter and functions to allow lubricating grease to be released from the bearing-accommodating space (13).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.