Fluid-assisted dust seal
US5324051A · kind A · utility
7Cited by
13References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 23, 1992 |
| Grant date | Jun 28, 1994 |
| Priority date | — |
| Expiry date | Jul 23, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S277/927
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A fluid-assisted dust seal for a drill shaft includes a tubular housing, flexible seals spaced apart in the housing along its length in contact with a drill shaft therein, a fluid plenum between two adjacent seals in the housing, and a fluid inlet for admitting pressurized fluid into the plenum, to deflect the seals downwardly so as to cause fluid flow out the bottom of the seal and thereby limiting entry of dust into the housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.