| 摘要 |
A grain transporter (10) having a rectangular roof opening closable by a double-door closure whereof the doors (11, 12) are hingeable about spaced parallel shafts longitudinal of said transporter (10). The piston heads (19) of piston and cylinder arrangements (17, 18) on extension and retraction, thereof operate at each end of the doors (11, 12) a pair of pivotal, upwardly divergent struts (21, 22) to open and close the doors (11, 12) respectively. Each piston head (19) includes a roller (19A) which is constrained to run in an enclosed channel (20). <IMAGE> |
