Title:
WRENCH OR SHIFTING SPANNER
Document Type and Number:
WIPO Patent Application WO2002074497
Kind Code:
A3
Abstract:
A spanner may be a fixed open jaw, ring or shifting type, characterised in that each face of the spanner that engages a face of a hexagon nut or bolt, has a semi-circular groove in the face, the groove exceeding the dimensions of the apexes of the hexagon shape of the nut or bolt and having sharp corners where the groove meets the face. The groove can be engaged with the apexes of the nut or bolt hexagon shape as a firmer grip if very large torques must be applied, e.g. for loosening stubborn nuts or bolts.
Inventors:
GREYVENSTEYN PAUL SNYMAN (ZA)
Application Number:
PCT/ZA2002/000027
Publication Date:
November 07, 2002
Filing Date:
March 11, 2002
Export Citation:
Assignee:
GREYVENSTEYN PAUL SNYMAN (ZA)
International Classes:
B25B13/04; B25B13/06; B25B13/08; B25B27/18; (IPC1-7): B25B13/06; B25B13/04; B25B13/08
Foreign References:
| US1626809A | 1927-05-03 | |||
| US3675516A | 1972-07-11 | |||
| FR1484112A | 1967-06-09 | |||
| US3495485A | 1970-02-17 | |||
| EP1050379A1 | 2000-11-08 |
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