Seal assembly having first and second seals acting in series
US5697620A · kind A · utility
5Cited by
7References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 30, 1996 |
| Grant date | Dec 16, 1997 |
| Priority date | — |
| Expiry date | Jul 30, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/002
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
To provide a better seal for example in an indexing arm for a machine tool to prevent swarf getting to the rubber seal, an outer spring seal is provided. The seal takes the form a closely wound coil spring formed into a ring and positioned in a slightly expanded state in a vee-grove at the entrance to the space being sealed. The spring is compliant enough to allow for slight axial and transverse relative movements of the two parts of the arm and is hard enough not to be damaged by swarf or the limited relative rotation between the parts during indexing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.