Rotational coupling device with sealed key
US7721864B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 21, 2008 |
| Grant date | May 25, 2010 |
| Priority date | — |
| Expiry date | Dec 28, 2028 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D2048/0212
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A fluid actuated rotational coupling device is provided with improved sealing of fluid passages. The device includes a fluid actuated rotational coupling that is disposed on a rotatable shaft. The coupling defines a fluid port. A key is received within a keyway in the coupling and/or shaft and defines a fluid passage extending therethrough having fluid ports at either end aligned with the fluid port in the coupling and a fluid port in the shaft. The key also defines grooves formed in surfaces of the key and surrounding the fluid ports. Seals are disposed within the grooves in the key. By locating the fluid passage and seals in the key, the seals may be removed and replaced without removing the coupling from the shaft. Further, the seals are less likely to be damaged during installation of the coupling device on the shaft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.