| 摘要 |
<p>A ratchet mechanism comprising a disc rotatable on a pivot pin, said disc being provided with radially disposed ratchet teeth on a face of the disc, an engagement plate provided with channels corresponding to and engageable with the teeth of the disc, the ratchet face of the rotatable disc being biassed into engagement with the ratchet face of the plate, and means for disengaging the ratchet disc from the plate. The mechanism is particularly suitable for the construction of a hand brake for an automotive vehicle using thermoplastics as the material of construction.</p> |
