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US 5,073,082 AGranted
Hydraulic screw pump
OwnerKarl-August Radlikinventor
Life of this patent
Estimating the term…
Abstract
In a hydraulic screw pump, a sealing element for the peripheral edge of the rotary screw. The sealing element is formed with a channel along its length to fit over this edge of the rotary screw. The channel may be varied in depth to adjust the gap between the rotary screw and a water-carrying trough for the pump. The width of the channel may also be adjusted to accommodate rotary screws of varying thicknesses. The sealing element, thus, retains the desired width of the gap even though the edges of the rotary screw are chipped or worn away.
Claims9
A hydraulic screw pump for feeding waste water comprising:
- a screw body;
- a rotary screw helically attached to the screw body;
- a trough, the screw body being positioned in relation to the trough to form a gap of fixed width between an outer periphery of the rotary screw and the trough;
- and
- a sealing element attached to the outer periphery of the rotary screw along its entire length, the dimensions of the sealing element being such as to maintain the gap width constant.
2 more elements
Dependencies are inferred from the claim text.