B - Operations – Transporting – 25 – B
Patent
B - Operations, Transporting
25
B
B25B 13/46 (2006.01) B25B 13/04 (2006.01) B25B 13/22 (2006.01) B25B 13/36 (2006.01)
Patent
CA 2192531
An improved ratchet wrench includes an upper plate, a lower plate, a base disposed between the upper plate and the lower plate, two ratchets, two trigger blocks, two springs and two baffle elements. Both the upper plate and the lower plate have at least a bent portion at one end thereof. The distance between a middle portion of the upper plate and a middle portion of the lower plate is smaller than the distance between an upper bent portion and a lower bent portion of the plates, such that the distance between the middle portions is equivalent to the distance between the bent portions of the upper and lower plates multiplied by a cosine of the angle of the bend. By such an arrangement, the upper plate and the lower plate are identical in shape and length, and hence manufacture of the ratchet wrench may be speeded up and costs reduced.
Clé à rochet améliorée comprenant une plaque supérieure, une plaque inférieure, une base placée entre les plaques supérieure et inférieure, deux rochets, deux blocs de détente, deux ressorts et deux éléments de déviation. Chaque plaque a au moins une partie courbée à une extrémité. La distance entre une partie intermédiaire de la plaque supérieure et celle de la plaque inférieure est moins grande que la distance entre les parties courbées supérieure et inférieure des plaques, de façon que la distance entre les parties intermédiaires soit égale à la distance entre les parties courbées des plaques supérieure et inférieure multipliée par un cosinus de l'angle de courbure. Grâce à cet arrangement, les plaques supérieure et inférieure ont la même forme et longueur, permettant ainsi une fabrication accélérée de la clé à rochet et une diminution des coûts.
Smart & Biggar
Wei Hung-Yin
LandOfFree
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