Pneumatic pop-up units for material handling equipment

摘要

Pneumatic pop-up unit for material handling equipment. In one embodiment, the unit comprises a stamped metal housing having a circumferential flange extending radially outwardly from the top. The unit also comprises a stamped metal cap comprising an outer side wall bent down across the outside edge of the flange and then radially inwardly against the bottom surface of the flange. The unit further comprises a two-piece stamped metal piston slidably mounted within the housing. The unit further comprises a stamped metal race disposed within the piston. A monolayer of ball bearings are arranged within the race. A primary ball is seated directly on top of the bearings. The top of the primary ball extends partially through the open top of the top piston piece. The unit further comprises a rubber seal fitted around the piston and a coiled spring for biasing the piston downwardly within the housing.