Material or article handling – Apparatus for moving intersupporting articles into – within,... – Stack forming apparatus
Patent
1991-05-03
1994-04-05
Bollinger, David H.
Material or article handling
Apparatus for moving intersupporting articles into, within,...
Stack forming apparatus
4147922, 414495, 187 18, B65G 5722
Patent
active
052999068
ABSTRACT:
A self-adjusting load elevator has a base, a horizontal load platform, a vertically expandable scissors linkage coupled between the load platform and the base, and an air actuator chamber. The air actuator chamber is formed of a compressible bellows and a fixed volume reservoir. The bellows is compressible between specified maximum and minimum bellows heights which correspondingly determine substantially different maximum and minimum bellows volumes and coupled between the scissors linkage and the load platform. The air reservoir is coupled to the bellows and has a fixed volume that is substantial compared to the difference between the maximum and minimum bellows volumes. A normally closed air inlet/outlet valve is coupled to the air actuator.
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Bollinger David H.
Durando Antonio R.
Weiss Harry M.
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