EP 0345484 B1 19930714 - KNOCKER WITH SELF-CONTROL
Title (en)
KNOCKER WITH SELF-CONTROL
Publication
Application
Priority
DE 3819112 A 19880604
Abstract (en)
[origin: EP0345484A2] A pneumatic knocker for knocking dust off hopper walls is described, having a housing (1) enclosing an elongate spring space (13) with spring (9), which spring space (13) has a venting bore (7), and closed on one side by an upper wall (20) with hole (10), a valve wall (3) with connecting hole (8), having a piston (2) which can be moved towards the upper wall (20) against the pressure of the spring (9) by means of compressed air, and having a rapid venting valve (3, 8, 10, 11, 14a, 15) located in the region of the valve wall (3) which vents the space (22) under the piston (2) into the spring space (13) by means of an air line (14). <??>In order to extend the control possibilities to the extent that automatic clocked controls are improved, it is proposed according to the invention that a control bore (17) be arranged in the housing side wall (1a), extending radially in the fitting-side third of the height (H) of the housing (1) and connected via a control line (18) to a 3/2-way air valve (16) in the compressed air feed line (19), and that the 3/2-way air valve (16) be connected to the connecting hole (8) in the valve wall (3). <IMAGE>
IPC 1-7
IPC 8 full level
B08B 7/02 (2006.01); B06B 1/18 (2006.01); B25D 9/14 (2006.01); B65D 88/66 (2006.01); B65D 88/70 (2006.01); B65G 53/38 (2006.01)
CPC (source: EP US)
B25D 9/14 (2013.01 - EP US); B65D 88/66 (2013.01 - EP US)
Designated contracting state (EPC)
CH DE ES FR GB LI NL SE
DOCDB simple family (publication)
EP 0345484 A2 19891213; EP 0345484 A3 19901205; EP 0345484 B1 19930714; DE 3819112 A1 19891214; DE 58904899 D1 19930819; ES 2041884 T3 19931201; JP 2655281 B2 19970917; JP H0243131 A 19900213; US 4974494 A 19901204
DOCDB simple family (application)
EP 89108575 A 19890512; DE 3819112 A 19880604; DE 58904899 T 19890512; ES 89108575 T 19890512; JP 13744589 A 19890601; US 35227489 A 19890516