Conveyors: fluid current – Intake to fluid current conveyor – Load receptacle type
Patent
1988-06-29
1990-01-16
Peters, Jr., Joseph F.
Conveyors: fluid current
Intake to fluid current conveyor
Load receptacle type
406128, 406124, 406109, 406118, 406123, 406194, 406195, 406196, 406191, 406144, 406 92, 406 85, 13762414, 13762418, 138 37, 138 39, 222439, B65G 5346, B65G 5340, B65G 5352, B65G 5354
Patent
active
048939668
ABSTRACT:
A lock apparatus for introducing granular dry material into a pneumatic conveying conduit (32), for example of a concrete gun, consisting of a material feeding hopper (4) having a shut-off valve (6) actuable by a pneumatic working cylinder (8). Beneath the shut-off valve (6) two hose portions (16 and 22) are arranged in series and on each of said portions a hose squeezing means (34 and 38) engages between which the hose portions (16 and 22) form a lock chamber (44) which is additionally provided with a blowing air connection (62). By the shut-off valve (6) and the upper hose squeezing means (34) an antechamber (42) is formed. When the upper hose squeezing means (34) is closed and the shut-off valve (6) opened the antechamber (42) is filled from the feeding hopper (4) by free fall. At the same time the lock chamber (44) can be discharged into the blow conduit (32) by opening the hose squeezing means (38). The uppermost (6) and lowermost (38) shut-off members then close again and by opening the upper hose squeezing means (34) the contents of the antechamber (42) are discharged into the lock chamber (44). The hose squeezing means (34 and 38) operate against an empty hose. The sole material-contacted shut-off member is the shut-off valve (6). The apparatus otherwise comprises no wearing sealing parts.
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Kannofsky James M.
Peters Jr. Joseph F.
Schuman Jack
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