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US 10,465,688 B2Granted
Coupling and rotor shaft for molten metal devices
AssigneeMolten Metal Equipment Innovations, LLC
InventorPaul V. Cooper
Life of this patent
Estimating the term…
Abstract
A coupling has an opening and a protrusion extending downward from the opening. The protrusion has threads that are preferably positioned outside of the opening. A rotor shaft that connects to the coupling has an internal bore with threads that receives and retains the protrusion, such as by a threaded connection between the two, so the protrusion applies driving force to the shaft.
Claims24
A molten metal pump comprising:
- (a) a motor having a motor shaft connected thereto, the motor shaft having a first end connected to the motor and a second end having a plurality of fastener apertures therein;
- (b) a coupling comprising a cylindrical outer surface and having a first end having a plurality of fastener holes extending therethrough aligned with the apertures in the motor shaft for receiving fasteners therein, and a second end of the coupling comprising:
- (i) a collar having an annular inner sidewall defining a cavity therein concentric with the cylindrical outer surface and having an opening configured to receive an end of a rotor shaft, the cavity defining a top surface at an enclosed end of the cavity;
- and
- (ii) a partially threaded cylindrical projection axially protruding through the center of the opening and axially extending outside of the opening, the projection being threaded only outside of the opening such that there are no threads axially within the cavity;
- and
- (c) a rotor shaft having (i) a first end positioned at least partly in the cavity of the collar, the first end comprising a bore having a threaded portion that is threadingly connected to the projection outside of the opening to facilitate unthreading of the rotor shaft, and (ii) a second end having a rotor connected thereto.
4 more elements
A rotary degasser comprising:
- (a) a motor having a motor shaft connected thereto, the motor shaft having a first end connected to the motor and a second end having a plurality of fastener apertures therein;
- (b) a coupling comprising a cylindrical outer surface and having a first end having a plurality of fastener holes extending therethrough aligned with the apertures in the motor shaft for receiving fasteners therein, and a second end of the coupling comprising:
- (i) a collar having an annular inner sidewall defining a cavity therein concentric with the cylindrical outer surface and having an opening configured to receive an end of a rotor shaft, the cavity defining a top surface at an enclosed end of the cavity;
- and
- (ii) a partially threaded cylindrical projection axially protruding through the center of the opening and axially extending outside of the opening, the projection being threaded only outside of the opening such that there are no threads axially within the cavity;
- and
- (c) a rotor shaft having (i) a first end positioned at least partly in the cavity of the collar, the first end comprising a bore having a threaded portion that is threadingly connected to the projection outside of the opening to facilitate unthreading of the rotor shaft, and (ii) a second end having a rotor connected thereto.
4 more elements
Dependencies are inferred from the claim text.