B - Operations – Transporting – 23 – B
Patent
B - Operations, Transporting
23
B
29/1
B23B 11/00 (2006.01)
Patent
CA 1178799
ABSTRACT A counterbalance system for a member that is movable in a vertical path relative to a fixed base member of a machine, a piston and cylinder mechanism having its cylinder secured to one of the members and its piston attached to the other of the members, a conduit carrying compressed air connected to the cylinder to produce a force urging the movable member in an upward direction for counterbalancing its weight; closure means at the end of the conduit opposite the end connected to the cylinder for pre- venting the escape of the compressed air from the system, and a receiver adapted to contain a volume of compressed air and being coupled to the conduit between the cylinder and the closure means and having sufficient capacity to absorb the compressed air when it is forced out of the cylinder by the movement of the movable member in one direction and to return the compressed air to the system for maintaining the pressure when the compressed air moves into the cylinder to accommodate the movement of the movable member in the opposite direction so that the member is counterbalanced by the uniform pressure in the closed system as maintained by the operation of the receiver.
446580
Cleek Alvin L.
Sipek Charles B.
Zankl Frank
Kearney & Trecker Corporation
Marcoux & Sher Swabey Mitchell Houle
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