B - Operations – Transporting – 66 – F
Patent
B - Operations, Transporting
66
F
254/170, 144/27
B66F 3/24 (2006.01) A01G 23/08 (2006.01)
Patent
CA 1078813
ABSTRACT A cylinder housing has a piston projecting from one end thereof for forming a longitudinally expandable ram. One end of the cylinder housing has a base and the projecting end of the piston has a head whereby upon engagement of the base of the cylinder and the head of the piston between the top and bottom of a backcut provided in the tree, the tree can be felled by expanding the ram, The engaging surface between the end of the piston and its head comprises a slidable concave-convex surface engagement to allow relative movement of the head on the piston as the tree falls. The head is held on the piston but capable of its relative sliding movement by a resilient cord connected between it and the base of the cylinder. The piston is hollow to reduce the weight of the unit and employs a novel seal between it and the cylinder. A pump for operating the ram is associated therewith and in a preferred arrangement such pump comprises a hand-operated pump and is mounted on a backpack having hollow frame members providing a reservoir for hydraulic fluid for the pump. The back pack also has support brackets for removably holding one or more of the rams on it for manual transportation.
278261
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