US Patent: 4,934,220
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| Sealed Reversible Ratchet Wrench
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Patentees:
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| Randall J. Slusar (exact or similar names) - Greenfield, WI |
| Jeffrey R. Annis (exact or similar names) - Waukesha, WI |
| John W. Roberts (exact or similar names) - Yorkville, WI |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Apr. 03, 1989 |
| Granted: |
Jun. 19, 1990 |
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Stan Schulz
Snap-On Tools Company History
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Description: |
| Emrich & Dithmar - patent attorneys
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.
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