Fluid coupling device
US5203592A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 24, 1991 |
| Grant date | Apr 20, 1993 |
| Priority date | — |
| Expiry date | Sep 24, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L27/0828
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
In a non-contacting fluid coupling device for feeding fluid to a hollow core of a rotating tool, one end of a hollow coupling shaft is attached in fluid communication to the shaft of the rotating tool. The other end of the coupling shaft is received, in a non-contact manner, in a hollow of a coupling main body. The coupling main body has an opening and passage in fluid communication with the hollow coupling shaft to introduce high pressure fluid to the hollow core of the rotating tool. Between the hollow of the coupling main body and the coupling shaft is at least one pressure reduction passage. Downstream of each pressure reduction passage is a pressure reduction chamber having a drain hole to the atmosphere. Downstream of the last pressure reduction chamber is a minute space between the coupling main body and the coupling shaft into which is introduced compressed air that precludes leakage of the fluid further downstream in the coupling device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.