Document Type and Number:
Japanese Patent JPS55501189
Kind Code:
A
Abstract:
PCT No. PCT/DE80/00011 Sec. 371 Date Oct. 1, 1980 Sec. 102(e) Date Sep. 25, 1980 PCT Filed Jan. 31, 1980 PCT Pub. No. WO80/01594 PCT Pub. Date Aug. 7, 1980.In pumps for viscous substances, particularly pumps for concrete, with two feed cylinders (2) opening out into a hopper (1), which cylinders (2) alternately draw the material to be forwarded from the hopper (1) and press it via a swingable S-shaped tube (5), arranged within the hopper (1), into a delivery pipe, the swivel bearing is constructed in such a way that the pressure of the material to be forwarded is changed into an axial thrust force on the axially movably arranged swivel tube (5) whereby the contact pressure of a wear ring (20) is increased, to ensure a sealing abutment of the wear ring attached to the end of the swivel tube with the rear wall (44) of the hopper (1) including the outlets of the feed cylinders, which wall (44) may if necessary, be reinforced with a spacer (22), and to ensure uniform wear over the whole face of the wear ring (20). Uniform wear of the wear ring (20) over the whole of its face is additionally effected in that the wear ring (20) is rotatably mounted on the end of the swivel tube (5).
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Application Number:
JP50045980A
Publication Date:
December 25, 1980
Filing Date:
January 31, 1980
Export Citation:
International Classes:
F04B7/00; F04B15/02; F04B7/02; (IPC1-7): F04B15/02