| 摘要 |
<p>1284356 Friction clutches NISSAN MOTOR CO Ltd 29 May 1970 [30 June 1969] 26004/70 Heading F2C To prevent inadvertent engagement of an hydraulically applied multidisc friction clutch due to centrifugal force acting on apply pressure liquid remaining in the clutch-apply cylinder after clutch disengagement, the clutch-apply piston is formed with a through passage (54), Fig. 2 (not shown), closed during clutch application by the apply pressure acting on a valve comprising a central disc 56 with radial arms 57a, 57b and 57c formed with axially displaced resilient circumferential projections 58a, 58b and 58c which hold the disc away from the end of passage 54 during clutch disengagement to allow release of the centrifugally pressurized liquid. The valve is held in a recess (53) in the piston by an annulus (62), Fig. 4 (not shown), having three axial legs (64a), (64b) and (64c) received in the spaces 60a, 60b and 60c in the valve. The projections 58a, 58b and 58c may have tabs (65), Fig. 5 (not shown), formed at their free ends to abut the recess wall, or the recess may have a peripheral groove (66), Fig. 6 (not shown), in its base wall to encapture the ends of the projections. As described, the clutch is one of a pair in a Simpson's planetary change-speed gear.</p> |
