Pump

Claim 2

A rotary pump comprising a casing haVing an interior hollow chamber, a rotary impeller disposed in said chamber, a shaft connected with said impeller and extending exteriorly of the casing for rotatably driving the impeller, inlet means in said casing for admitting flowable material to be pumped to the central portion of the impeller, said impeller including vanes thereon for impelling the material as the impeller rotates, outlet means incorporated into the casing and communicating with the portion of the casing receiving the periphery of the impeller for receiving the material impelled by the impeller, said outlet means including radially and inwardly extending passage defining means communicating with an outlet pipe extending axially and generally coincident to the rotational axis of the impeller.

Claim 3

The structure as defined in claim 1 wherein said impeller is in the form of a substantially circular plate, and vanes being disposed radially on each surface of the plate, the central portion of the plate including aperture means therein enabling flowable material to be impelled by the vanes on both sides of the impeller.

Claim 4

The structure as defined in claim 1 wherein said rotary impeller includes a hub received on said shaft, means rigidly fixing the hub to said shaft, each end of the hub having a tapering internal surface, a pair of split tapered collets interposed between the shaft and the tapered ends of the hub with at least one of the collets being longitudinally movable on the shaft for centering the hub and impeller in relation to the shaft, and screw threaded means connected with the shaft for balancing the collits toward each other for securing the hub fixedly in concentric relation to the shaft.

Claim 5

The structure defined in claim 2 wherein said aperture means in the impeller includes a plurality of openings through the plate to provide hydraulic balance to both surfaces of the impeller plate.

Claim 6

A rotary pump comprising a casing having an interior hollow chamber, a rotary impeller disposed in said chamber, a shaft connected with said impeller and extending exteriorly of the casing for rotatably driving the impeller, inlet means in said casing for admitting flowable material to be pumped to the central portion of the impeller, said impeller including vanes thereon for impelling the material as the impeller rotates, outlet means incorporated into the casing and communicating with the portion of the casing receiving the periphery of the impeller for receiving the material impelled by the impeller, said outlet means including inwardly extending passage defining means communicating with an outlet pipe generally coincident to the rotational axis of the impeller, said impeller being in the form of a substantially circular plate, said vanes being disposed radially on each surface of the plate, the central portion of the plate including aperture forming means therein enabling flowable material to be impelled by the vanes on both sides of the impeller, said inlet means being in the form of a tubular member having an inlet pipe communicated therewith, said shaft being disposed in said tubular member, seal means interconnecting the shaft and tubular member outwardly of the inlet pipe for sealing the shaft, and bearing means on said casing axially outwardly of the tubular member for supporting said shaft in relation to the casing, and means enabling circulation of cooling fluid in relation to the bearing means for preventing excessive temperatures occurring in the bearing means.

Claim 7

A rotary pump comprising a casing having an interior hollow chamber, a rotary impeller disposed in said chamber, a shaft connected with said impeller and extending exteriorly of the casing for rotatably driving the impeller, inlet means in said casing for admitting flowable material to be pumped to the central portion of the impeller, said impeller including vanes thereon for impelling the material as the impeller rotates, outlet means incorporated into the casing and communicating with the portion of the casing receiving the periphery of the impeller for receiving the material impelled by the impeller, said outlet means including inwardly extending passage defining means communicating with an outlet pipe generally coincident to the rotational axis of the impeller, said impeller being in the form of a substantially circular plate, said vanes being disposed radially on each surface of the plate, the central portion of the plate including aperture forming means therein enabling flowable material to be impelled by the vanes on both sides of the impeller, said inlet means being in the form of a tubular member having an inlet pipe communicated therewith, said shaft being disposed in said tubular member, seal means interconnecting the shaft and tubular member outwardly of the inlet pipe for sealing the shaft, and bearing means on said casing axially outwardly of the tubular member for supporting said shaft in relation to the casing, and means enabling circulation of cooling fluid in relation to the bearing means for preventing excessive temperatures occurring in the bearing means.

Claim 8

The structure as defined in claim 5 wherein said means enabling circulation of cooling fluid including a pipe extending from the periphery of the chamber in the casing for inlet of cooling fluid, a pipe communicating with the tubular member to return the cooling fluid to the inlet means on the pump, and a jacket encircling the bearing means for enabling circulation of cooling fluid.

Claim 9

The structure as defined in claim 6 wherein said seal means includes a tubular member disposed concentrically within the tubular member defining the iNlet means and receiving a plurality of seal rings therein in sealing engagement with the shaft, lubrication means for said seal rings, said lubrication means including a piston and cylinder to force lubrication means into the seal rings, and conduit means interconnecting the lubrication cylinder and piston and the pipe extending from the periphery of the chamber in the casing for inlet of cooling fluid to the jacket thereby providing pressure lubrication of the seal rings.

Claim 10

A rotary pump comprising a casing having an interior hollow chamber, a rotary impeller disposed in said chamber, a shaft connected with said impeller and extending exteriorly of the casing for rotary driving the impeller, inlet means in said casing for admitting flowable material to be pumped to the central portion of the impeller, said impeller including vanes thereon for impelling the material as the impeller rotates, outlet means incorporated into the casing and communicating with the portion of the casing receiving the periphery of the impeller for receiving the material impelled by the impeller, sad outlet means including inwardly extending passage defining means communicating with an outlet pipe generally coincident to the rotational axis of the impeller, said impeller being in the form of a substantially circular plate, said vanes being disposed radially on each surface of the plate, the central portion of the plate including aperture forming means therein enabling flowable material to be impelled by the vanes on both sides of the impeller, said impeller including a centrally disposed annular ring on each side thereof in encircling relation to the aperture means, one of the rings being received closely within the inlet means, said casing including a recess receiving the other annular ring

Claim 11

A rotary pump comprising a casing having an interior hollow chamber, a rotary impeller disposed in said chamber, a shaft connected with said impeller and extending exteriorly of the casing for rotary driving the impeller, inlet means in said casing for admitting flowable material to be pumped to the central portion of the impeller, said impeller including vanes thereon for impelling the material as the impeller rotates, outlet means incorporated into the casing and communicating with the portion of the casing receiving the periphery of the impeller for receiving the material impelled by the impeller, sad outlet means including inwardly extending passage defining means communicating with an outlet pipe generally coincident to the rotational axis of the impeller, said impeller being in the form of a substantially circular plate, said vanes being disposed radially on each surface of the plate, the central portion of the plate including aperture forming means therein enabling flowable material to be impelled by the vanes on both sides of the impeller, said impeller including a centrally disposed annular ring on each side thereof in encircling relation to the aperture means, one of the rings being received closely within the inlet means, said casing including a recess receiving the other annular ring

Claim 12

A rotary pump comprising a casing having an interior hollow chamber, a rotary impeller disposed in said chamber, a shaft connected with said impeller and extending exteriorly of the casing for rotatably driving the impeller, inlet means in said casing for admitting flowable material to be pumped to the central portion of the impeller, said impeller including vanes thereon for impelling the material as the impeller rotates, outlet means incorporated into the casing and communicating with the portion of the casing receiving the periphery of the impeller for receiving the material impelled by the impeller, said outlet means including inwardly extending passage defining means communicating with an outlet pipe generally coincident to the rotational axis of the impeller, said outlet means including a substantially circular plate defining the rear surface of the chamber, said radially extending passage defining means being rigid with said plate, tapering inlet channels communicating the outer periphery of the chamber with the radial passage defining means.

Claim 13

A rotary pump comprising a casing having an interior hollow chamber, a rotary impeller disposed in said chamber, a shaft connected with said impeller and extending exteriorly of the casing for rotatably driving the impeller, inlet means in said casing for admitting flowable material to be pumped to the central portion of the impeller, said impeller including vanes thereon for impelling the material as the impeller rotates, outlet means incorporated into the casing and communicating with the portion of the casing receiving the periphery of the impeller for receiving the material impelled by the impeller, said outlet means including inwardly extending passage defining means communicating with an outlet pipe generally coincident to the rotational axis of the impeller, said outlet means including a substantially circular plate defining the rear surface of the chamber, said radially extending passage defining means being rigid with said plate, tapering inlet channels communicating the outer periphery of the chamber with the radial passage defining means.

Claim 14

The structure as defined in claim 9 wherein said casing is provided with a deflector ring at the outer periphery of the impeller, said deflector ring including a plurality of radial notches therein with each of the notches including an inclined surface extending circumferentially in the direction of rotation and inclined axially toward the channels for deflecting the material being pumped into the channels and passage defining means for discharge.

Claim 15

The structure as defined in claim 10 together with an insert adapter for converting the pump to a multiple stage pump, said casing including an inlet portion and a discharge portion, said portions of the casing being separable at the outer periphery of the chamber, said insert adapter including a duplication of the discharge portion and the inlet portion of the casing, a duplication of the impeller and deflector ring and an extension for the drive shaft for enabling a single or multiple number of insert adapters to be incorporated into the pump to enable any number of stages to be provided.

Claim 16

The structure defined in claim 11 wherein said extension for the drive shaft is threadly connected thereto and Includes a duplicate connection with the impeller.

Claim 17

A rotary pump comprising a casing having a hollow interior chamber with an inlet at one side thereof, a rotary impeller disposed within said chamber and separating the chamber into two compartments with the inlet communicating with one compartment, said impeller including a plate of generally circular configuration with the periphery of the pate being disposed closely adjacent the internal periphery of the chamber, said plate including centrally disposed aperture means communicating the compartments of the chamber with each other and enabling inlet of flowable material from the inlet to both compartments for hydraulically balancing the impeller, said impeller plate including projecting vanes on both surfaces thereof for impelling flowable material thereof during rotation, and discharge means communicated with the casing for discharge of flowable material being pumped.

Claim 18

A rotary pump comprising a casing having a hollow interior chamber with an inlet at one side thereof, a rotary impeller disposed within said chamber and separating the chamber into two compartments with the inlet communicating with one compartment, said impeller including a plate of generally circular configuration with the periphery of the pate being disposed closely adjacent the internal periphery of the chamber, said plate including centrally disposed aperture means communicating the compartments of the chamber with each other and enabling inlet of flowable material from the inlet to both compartments for hydraulically balancing the impeller, said impeller plate including projecting vanes on both surfaces thereof for impelling flowable material thereof during rotation, and discharge means communicated with the casing for discharge of flowable material being pumped.