Pin coupling for connecting a rotary drive to a progressive-cavity pump
OwnerGordon L. FENTON, Christopher Oaksinventors
Life of this patent
Estimating the term…
Abstract
A drive having a rotary output and a pump having a rotary input are interconnected by a pin coupling that has an inner coupling head having a part-spherical outer surface and an outer coupling head having a socket. A thrust plate in the socket is formed with a part-spherical inner surface complementary to the outer surface and into which the inner coupling head is inserted with the surfaces in surface contact for transmission of axial forces. A pin extending transversely through the heads rotationally interconnects the pump input and drive output while permitting relative angular displacement of the input and output.
Claims11
In combination with a drive having a rotary output and a pump having a rotary input, a pin coupling comprising:
- an inner coupling head having a part-spherical outer surface;
- an outer coupling head having a socket;
- a thrust plate in the socket and formed with a part-spherical inner surface complementary to the outer surface and into which the inner coupling head is inserted with the surfaces in surface contact;
- and
- a pin extending transversely through the heads and rotationally interconnecting the pump input and drive output while permitting relative angular displacement of the input and output.
In combination:
- a rotary drive having an output shaft rotatable about a drive-shaft axis and having an end;
- a progressive-cavity pump offset axially from the drive and having a rotor with axially spaced from the drive output shaft;
- an axially extending connecting rod having an inner rod end juxtaposed with the drive shaft and an outer rod end juxtaposed with the rotor end;
- and
- respective inner and outer pin couplings between inner and outer ends of the connecting rod and the drive shaft and rotor end, each pin coupling comprising:
- an outer socket on the outer end of the respective rod end and formed with a part-spherical surface, whereby axial force is transmitted between the rod and the socket at the part-cylindrical surfaces,
- a part-cylindrical surface on the respective rod end fitted complementarily into the respective outer surface of the respective socket, and
- a pin extending transversely through the respective socket and the respective rod end and angularly coupling the connecting rod to the respective socket.
Dependencies are inferred from the claim text.