Device for preventing the ingress of water into the head of a dental contra-angle
US4369034A · kind A · utility
10Cited by
2References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 22, 1981 |
| Grant date | Jan 18, 1983 |
| Priority date | — |
| Expiry date | Apr 22, 2001 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61C1/052
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
This device for preventing the ingress of water into the head of a dental contra-angle comprises a ring seal of cylindrical configuration adapted to be inserted through a hole formed in the bottom wall of the head body for the passage of the dental tool. This ring seal comprises at one end a flange having a diameter greater than the diameter of the passage hole and at its opposite end a bead also of greater diameter than the hole but adapted to be compressed when inserting the ring seal through the hole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.