Buckles – buttons – clasps – etc.
Patent
1977-04-07
1978-09-12
Blunk, Evon C.
Buckles, buttons, clasps, etc.
104138R, B65G 5106
Patent
active
041132025
ABSTRACT:
A conveying truck transported by absorption force or forcing force within a transportation tube, the truck being provided at rear and front thereof with a pad for carrying wheels and a seal plate for receiving a displaceable and movable seal material within an outer peripheral groove. Each pad is supported on a rotational shaft, which projects at rear and front of the truck. By being mounted on bearings, the truck itself is rotatable relative to the pads and the seal plates.
REFERENCES:
patent: 1779164 (1930-10-01), Grover
patent: 3734428 (1973-05-01), Alexandrov et al.
Blunk Evon C.
Nase Jeffrey V.
Ueno Kohgyo Limited
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