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US 4,772,177 AGranted
Screw pump
AssigneeHayashi Seiko Kabushiki Kaisha
InventorAkira Hayashi
Life of this patent
Estimating the term…
Abstract
This invention relates to a screw pump for feeding mixed concrete and the like, sticky material such as adhesive fluid without bitting and clogging and feeding them continuously and effectively. For preventing the bitting, a bearing is provided at the inlet of outer cylinder of the pump and inner sleeve of the bearing is fixed to the edge of screw. For preventing the clogging, a multiple of partition plates is inserted between the blade of the screw which can slide along the shaft of the screw.
Claims5
A screw pump comprising:
- an outer cylinder having a linear central axis, a cylindrical inner wall, an an axially extending groove in said inner wall,
- a helical screw extending axially inside said cylinder;
- drive means for driving said helical screw;
- a plurality of partitioning plates axially slidably fitted in said groove so as to be movable with said helical screw in an axial direction of said shaft and to be restrained against movement in a direction around said axis;
- and
- said plurality of partitioning plates constructed and arranged to engage said helical screw and fit between adjacent sections of said helix whereby to move axially and not rotatably when the screw is rotated around its axis;
- whereby adjacent revolving helical sections are partitioned from each other by said plates to prevent clogging of said pump.
4 more elements
Dependencies are inferred from the claim text.