ROTATIONAL SPEED REDUCTION DEVICE FOR TRUCK TAILGATE

摘要

A rotational speed reduction device (1) for a truck tailgate comprises a housing body (5), a rotor (8) disposed inside the housing body (5), a viscous fluid (14a) housed in an interior space (13a), channels (15a, 16a) provided to the rotor (8), a one-way valve (19) disposed in the channel (15a), and a one-way valve (20a) disposed in the channel (16a).