Hydraulic dispensing pistol for material in hose-type bag - has disc on piston extension expanding against housing

摘要

The hydraulically operated piston dispenses material from a bag formed from hose. On the extension (9) of its piston (1) is a disc (7) expanding against the housing (8) to prevent piston movement in the reverse direction. There can be a further disc (14) on a cylindrical body (10) expanding against the housing, and an annular chamber (6) with sealing rings (11) can be formed between the body and the piston extension. The operating medium under pressure can be delivered to the annular chamber via a hose (5). ADVANTAGE - No piston guide rod protruding rearwards.