Sealed reversible ratchet wrench
US4934220A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 3, 1989 |
| Grant date | Jun 19, 1990 |
| Priority date | — |
| Expiry date | Apr 3, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B13/463
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A ratchet mechanism in a reversible ratchet wrench is sealed by novel means. The sealed reversible ratchet wrench includes a ratchet body having a head portion and a handle portion. The head portion has a head cavity formed therein, which cavity receives the ratchet mechanism. The ratchet mechanism communicates exteriorly of the head cavity via at least two journal bearings which respectively receive journal pins associated with the ratchet mechanism. The novel sealing means comprises a pair of annular lip seals, each of which includes an opening that receives one of the journal pins. The annular lip seals bridge the gap between the exteriorly communicating journal bearings and journal pins, thereby facilitating the retention of lubricant and hindering the entry of foreign particles in the head cavity and ratchet mechanism housed therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.