Centrifugal pump with open type impeller

Claim 2

A centrifugal pump which comprises a hollow impeller shaft, an open type impeller mounted on the forward end portion of the shaft having torque transmitting means effective between, said shaft and said impeller while allowing for axial movement of the impeller on said shaft a tie rod having a forward threaded end portion threaded into said impeller shaft coaxial therewith, said threaded forward end portion being formed with a rearwardly facing annular shoulder adjacent to the end face of the impeller shaft, the rearward end portion of said tie rod being formed with a thread projecting rearwardly from said shaft, said tie rod being turnable relative to the impeller shaft for thereby effecting axial adjustment of the impeller relative to said shaft, as well as relative to the cover plate of a housing section surrounding the impeller, a lock nut provided upon said rearward end portion of the tie rod for securing the axial adjustment of the impeller due to said annular shoulder being tightened against said adjacent end face of the forward end of the impeller shaft, when said lock nut is tightened against the adjacent impeller shaft, a housing section surrounding the impeller, having a body portion provided with sealing means for the impeller shaft extending therethrough, and having a cover portion connected to said body portion, and formed with an inlet neck and with a outlet neck, a bearing section rigidly connected to the housing section, and having a pair of horizontally spaced bearings supporting the impeller shaft, and means for securing the impeller shaft against axial displacement relative to said bearing section.

Claim 3

A centrifugal pump which comprises a hollow impeller shaft formed interiorly with a forwardly facing annular shoulder, an open type impeller mounted on the forward end portion of the shaft having torque transmitting means effective between, said shaft and said impeller while allowing for axial movement of the impeller on said shaft, a tie rod having a forward end portion threaded into said impeller, and extending rearwardly through the impeller shaft coaxial therewith, and having a rearwardly facing annular shoulder adjacent to said forwardly facing shoulder of the impeller shaft, and also formed with a thread projecting rearwardly from said shaft, said tie rod being turnable relative to the impeller shaft for thereby axially adjusting the impeller relative to said shaft, as well as relative to the cover plate of a housing section surrounding the impeller, a lock nut provided upon said rearward end portion of the tie rod for securing the axial adjustment of the impeller due to said rearwardly facing shoulder of the shaft being tightened against said adjacent internal shoulder of the shaft, when said lock nut is tightened against the impeller shaft, a housing section surrounding the impeller, having a body portion provided with sealing means for the impeller shaft extending therethrough, and having a cover portion connected to said body portion, and formed with an inlet neck and with an outlet neck, a bearing section rigidly connected to the housing section, and having a pair of horizontally spaced bearings supporting the impeller shaft, and means for securing the impeller shaft against axial displacement relative to said bearing section.

Claim 4

A centrifugal pump which comprises a hollow impeller shaft formed interiorly with a forwardly facing annular shoulder, an open type impeller mounted on the forward end portion of the shaft having torque transmitting means effective between, said shaft and said impeller while allowing for axial movement of the impeller on said shaft, a tie rod having a forward end portion threaded into said impeller, and extending rearwardly through the impeller shaft coaxial therewith, and having a rearwardly facing annular shoulder adjacent to said forwardly facing shoulder of the impeller shaft, and also formed with a thread projecting rearwardly from said shaft, said tie rod being turnable relative to the impeller shaft for thereby axially adjusting the impeller relative to said shaft, as well as relative to the cover plate of a housing section surrounding the impeller, a lock nut provided upon said rearward end portion of the tie rod for securing the axial adjustment of the impeller due to said rearwardly facing shoulder of the shaft being tightened against said adjacent internal shoulder of the shaft, when said lock nut is tightened against the impeller shaft, a housing section surrounding the impeller, having a body portion provided with sealing means for the impeller shaft extending therethrough, and having a cover portion connected to said body portion, and formed with an inlet neck and with an outlet neck, a bearing section rigidly connected to the housing section, and having a pair of horizontally spaced bearings supporting the impeller shaft, and means for securing the impeller shaft against axial displacement relative to said bearing section.

Claim 5

A centrifugal pump which comprises a hollow impeller shaft, an open type impeller mounted on the forward end portion of the shaft having torque transmitting means effective between, said shaft and said impeller while allowing for axial movement of the impeller on said shaft, a tie rod haviNg a forward end portion fixed to said impeller, and extending rearwardly through the impeller shaft concentric therewith, and formed with an annular groove adjacent to its rearward end, an externally threaded nipple surrounding the rearward end portion of the tie rod, and threaded into the associated rearward end portion of the impeller shaft, said nipple having an inwardly directed radial projection extending into said annular groove, so that rotating said nipple in the thread will axially adjust the tie rod bodily together with the impeller relative to the impeller shaft, locking means for securing the nipple relative to the impeller shaft and thereby securing the axially adjusted position of the impeller, a housing section surrounding the impeller, having a body portion provided with sealing means for the impeller shaft extending therethrough, and having a cover portion connected to said body portion, and formed with an inlet neck and with an outlet neck, a bearing section fixedly connected to the housing section, supporting the impeller shaft, and means for securing the impeller shaft against axial displacement relative to said bearing section.

Claim 6

A centrifugal pump which comprises a hollow impeller shaft, an open type impeller mounted on the forward end portion of the shaft having torque transmitting means effective between, said shaft and said impeller while allowing for axial movement of the impeller on said shaft, a tie rod haviNg a forward end portion fixed to said impeller, and extending rearwardly through the impeller shaft concentric therewith, and formed with an annular groove adjacent to its rearward end, an externally threaded nipple surrounding the rearward end portion of the tie rod, and threaded into the associated rearward end portion of the impeller shaft, said nipple having an inwardly directed radial projection extending into said annular groove, so that rotating said nipple in the thread will axially adjust the tie rod bodily together with the impeller relative to the impeller shaft, locking means for securing the nipple relative to the impeller shaft and thereby securing the axially adjusted position of the impeller, a housing section surrounding the impeller, having a body portion provided with sealing means for the impeller shaft extending therethrough, and having a cover portion connected to said body portion, and formed with an inlet neck and with an outlet neck, a bearing section fixedly connected to the housing section, supporting the impeller shaft, and means for securing the impeller shaft against axial displacement relative to said bearing section.

Claim 7

The centrifugal pump according to claim 3, wherein said locking means comprise a lock nut engaging the external thread of said nipple, and effective to secure said axial adjustment of the impeller when said lock nut is tightened against the adjoining end face of the impeller shaft.

Claim 8

In a centrifugal pump of the open impeller type, a rotor assembly which comprises a hollow impeller shaft, an open type impeller mounted on the forward end portion of the shaft having torque transmitting means effective between, said shaft and said impeller while allowing for axial movement of the impeller on said shaft, a tie rod having a forward threaded end portion threaded into said impeller, and extending rearwardly through the impeller shaft coaxial therewith, the threaded forward end portion being formed with a rearwardly facing shoulder adjacent to the end face of the impeller shaft, the rearward end portion of the tie rod being formed with a thread projecting rearwardly from said shaft, said tie rod being turnable relative to the impeller shaft for thereby axially adjusting the impeller relative to said shaft, and a lock nut provided upon said rearward end portion of the tie rod for securing the axial adjustment of the impeller due to said annular shoulder being tightened against said adjacent end face of the forward end of the impeller shaft, when said lock nut is tightened against the impeller shaft.

Claim 9

In a centrifugal pump of the open impeller type, a rotor assembly which comprises a hollow impeller shaft, an open type impeller mounted on the forward end portion of the shaft having torque transmitting means effective between, said shaft and said impeller while allowing for axial movement of the impeller on said shaft, a tie rod having a forward threaded end portion threaded into said impeller, and extending rearwardly through the impeller shaft coaxial therewith, the threaded forward end portion being formed with a rearwardly facing shoulder adjacent to the end face of the impeller shaft, the rearward end portion of the tie rod being formed with a thread projecting rearwardly from said shaft, said tie rod being turnable relative to the impeller shaft for thereby axially adjusting the impeller relative to said shaft, and a lock nut provided upon said rearward end portion of the tie rod for securing the axial adjustment of the impeller due to said annular shoulder being tightened against said adjacent end face of the forward end of the impeller shaft, when said lock nut is tightened against the impeller shaft.

Claim 10

In a centrifugal pump of the open impeller type, a rotor assembly which comprises a hollow impeller shaft formed interiorly with a forwardly facing annular shoulder, an open type impeller mounted on the forward end portion of the shaft having torque transmitting means effective between, said shaft and said impeller while allowing for axial movement of the impeller on said shaft, a tie rod having a forward threaded end portion threaded into said impeller, and extending rearwardly through the impeller shaft coaxial therewith and formed with a rearwardly facing annular shoulder adjacent to said forwardly facing interior shoulder of the shaft, and also formed with a thread projecting rearwardly from the shaft, said tie rod being turnable relative to the impeller shaft for thereby axially adjusting the impeller relative to said shaft, and a lock nut provided upon said rearward end portion of the tie rod for securing the axial adjustment of the impeller due to said rearwardly facing shoulder of the tie rod being tightened against said adjacent internal shoulder of the shaft, when said lock nut is tightened against the impeller shaft.

Claim 11

In a centrifugal pump of the open impeller type, a rotor assembly which comprises a hollow impeller shaft formed interiorly with a forwardly facing annular shoulder, an open type impeller mounted on the forward end portion of the shaft having torque transmitting means effective between, said shaft and said impeller while allowing for axial movement of the impeller on said shaft, a tie rod having a forward threaded end portion threaded into said impeller, and extending rearwardly through the impeller shaft coaxial therewith and formed with a rearwardly facing annular shoulder adjacent to said forwardly facing interior shoulder of the shaft, and also formed with a thread projecting rearwardly from the shaft, said tie rod being turnable relative to the impeller shaft for thereby axially adjusting the impeller relative to said shaft, and a lock nut provided upon said rearward end portion of the tie rod for securing the axial adjustment of the impeller due to said rearwardly facing shoulder of the tie rod being tightened against said adjacent internal shoulder of the shaft, when said lock nut is tightened against the impeller shaft.

Claim 12

In a centrifugal pump, a rotor assembly which comprises a hollow impeller shaft, an open type impeller mounted on the forward end portion of the shaft having torque transmitting means effective between, said shaft and said impeller while allowing for axial movement of the impeller on said shaft, a tie rod having a forward end portion fixed to said impeller, and extending rearwardly through the impeller shaft, and formed with an annular groove adjacent to its rearward end, an externally threaded nipple surrounding the rearward end portion of the tie rod, and threaded into the associated rearward end of the impeller shaft, said nipple having an inwardly directed radial projection extending into said annular groove, so that rotating said nipple in the thread will axially adjust the tie rod bodily together with the impeller relative to the shaft, and locking means for securing the nipple relative to the impeller shaft and thereby securing the axially adjusted position of the impeller.

Claim 13

In a centrifugal pump, a rotor assembly which comprises a hollow impeller shaft, an open type impeller mounted on the forward end portion of the shaft having torque transmitting means effective between, said shaft and said impeller while allowing for axial movement of the impeller on said shaft, a tie rod having a forward end portion fixed to said impeller, and extending rearwardly through the impeller shaft, and formed with an annular groove adjacent to its rearward end, an externally threaded nipple surrounding the rearward end portion of the tie rod, and threaded into the associated rearward end of the impeller shaft, said nipple having an inwardly directed radial projection extending into said annular groove, so that rotating said nipple in the thread will axially adjust the tie rod bodily together with the impeller relative to the shaft, and locking means for securing the nipple relative to the impeller shaft and thereby securing the axially adjusted position of the impeller.

Claim 14

The centrifugal pump according to claim 7, wherein said locking means comprise a lock nut engaging the external thread of said nipple, and effective to secure said axially adjusted position of the impeller when said lock nut is tightened against the adjoining end face of the impeller shaft.

Claim 15

A centrifugal pump which comprises a hollow impeller shaft an open type impeller mounted on the forward end portion of the shaft having torque transmitting means effective between, said shaft and said impeller while allowing for axial movement of the impeller on said shaft, a tie rod having a forward threaded end portion threaded into said impeller, and extending rearwardly through the impeller shaft coaxial therewith, said rod being turnable relative to the impeller shaft for thereby effecting axial adjustment of the impeller relative to said shaft, while secured against rearward axial displacement relative to said shaft, locking means for securing said axial adjustment by fixing said tie rod relative to said shaft, a housing section surrounding the impeller, having a body portion provided with sealing means for the impeller shaft extending therethrough, and having a cover portion connected to said body portion, and formed with an inlet neck and with an outlet neck, a bearing section rigidly connected to the housing section, and having a pair of horizontally spaced bearings supporting the impeller shaft, and means for securing the impeller shaft against axial displacement relative to said bearing section.

Claim 16

A centrifugal pump which comprises a hollow impeller shaft an open type impeller mounted on the forward end portion of the shaft having torque transmitting means effective between, said shaft and said impeller while allowing for axial movement of the impeller on said shaft, a tie rod having a forward threaded end portion threaded into said impeller, and extending rearwardly through the impeller shaft coaxial therewith, said rod being turnable relative to the impeller shaft for thereby effecting axial adjustment of the impeller relative to said shaft, while secured against rearward axial displacement relative to said shaft, locking means for securing said axial adjustment by fixing said tie rod relative to said shaft, a housing section surrounding the impeller, having a body portion provided with sealing means for the impeller shaft extending therethrough, and having a cover portion connected to said body portion, and formed with an inlet neck and with an outlet neck, a bearing section rigidly connected to the housing section, and having a pair of horizontally spaced bearings supporting the impeller shaft, and means for securing the impeller shaft against axial displacement relative to said bearing section.

Claim 17

In a centrifugal pump of the open impeller type, a rotor assembly which comprises a hollow impeller shaft, an open type impeller mounted on the forward end portion of the shaft having torque transmitting means effective between, said shaft and said impeller while allowing for axial movement of the impeller on said shaft, a tie rod having a forward end portion threaded to said impeller, and extending rearwardly through the impeller shaft concentric therewith, said rod being turnable relative to the impeller shaft for thereby effecting axial adjustment of the impeller relative to said shaft, while secured against rearward axial displacement relative to said shaft, and locking means for securing said axial adjustment by fixing said tie rod relative to said shaft.

Claim 18

In a centrifugal pump of the open impeller type, a rotor assembly which comprises a hollow impeller shaft, an open type impeller mounted on the forward end portion of the shaft having torque transmitting means effective between, said shaft and said impeller while allowing for axial movement of the impeller on said shaft, a tie rod having a forward end portion threaded to said impeller, and extending rearwardly through the impeller shaft concentric therewith, said rod being turnable relative to the impeller shaft for thereby effecting axial adjustment of the impeller relative to said shaft, while secured against rearward axial displacement relative to said shaft, and locking means for securing said axial adjustment by fixing said tie rod relative to said shaft.

Claim 19

A centrifugal pump of the open impeller type, which comprises a hollow impeller shaft, an open type impeller mounted on the forward end portion of the shaft having torque transmitting means effective between, said shaft and said impeller while allowing for axial movement of the impeller on said shaft, a tie rod having a forward end portion fixed to said impeller, and extending rearwardly through the impeller shaft concentric therewith, and formed with an annular groove adjacent to its rearward end, a threaded nipple surrounding the rearward end portion of the tie rod, in threaded engagement with the associated rearward end portion of the impeller shaft, said nipple having an inwardly directed radial projection extending into said annular groove, so that rotating said nipple relative to the shaft will axially adjust the tie rod bodily together with the iMpeller relative to the shaft, locking means for securing the nipple relative to the impeller shaft and thereby securing the axially adjusted position of the impeller, a housing section surrounding the impeller, having a body portion provided with sealing means for the impeller shaft extending therethrough, and having a cover portion connected to said body portion, and formed with an inlet neck and an outlet neck, a bearing section fixedly connected to the housing section, supporting the impeller shaft, and means for securing the impeller shaft against axial displacement relative to said bearing section.

Claim 20

A centrifugal pump of the open impeller type, which comprises a hollow impeller shaft, an open type impeller mounted on the forward end portion of the shaft having torque transmitting means effective between, said shaft and said impeller while allowing for axial movement of the impeller on said shaft, a tie rod having a forward end portion fixed to said impeller, and extending rearwardly through the impeller shaft concentric therewith, and formed with an annular groove adjacent to its rearward end, a threaded nipple surrounding the rearward end portion of the tie rod, in threaded engagement with the associated rearward end portion of the impeller shaft, said nipple having an inwardly directed radial projection extending into said annular groove, so that rotating said nipple relative to the shaft will axially adjust the tie rod bodily together with the iMpeller relative to the shaft, locking means for securing the nipple relative to the impeller shaft and thereby securing the axially adjusted position of the impeller, a housing section surrounding the impeller, having a body portion provided with sealing means for the impeller shaft extending therethrough, and having a cover portion connected to said body portion, and formed with an inlet neck and an outlet neck, a bearing section fixedly connected to the housing section, supporting the impeller shaft, and means for securing the impeller shaft against axial displacement relative to said bearing section.

Claim 21

In a centrifugal pump, a rotor assembly which comprises a hollow impeller shaft, an open type impeller mounted on the forward end portion of the shaft having torque transmitting means effective between, said shaft and said impeller while allowing for axial movement of the impeller on said shaft, a tie rod having a forward end portion fixed to said impeller, and extending rearwardly through the impeller shaft concentric therewith, and formed with an annular groove adjacent to its rearward end, a threaded nipple surrounding the rearward end portion of the tie rod, in threaded engagement with the associated rearward end portion of the impeller shaft, said nipple having an inwardly directed radial projection extending into said annular groove, so that rotating said nipple relative to the shaft will axially adjust the tie rod bodily together with the impeller relative to the shaft, and locking means for securing the nipple relative to the impeller shaft and thereby securing the axially adjusted position of the impeller.

Claim 22

In a centrifugal pump, a rotor assembly which comprises a hollow impeller shaft, an open type impeller mounted on the forward end portion of the shaft having torque transmitting means effective between, said shaft and said impeller while allowing for axial movement of the impeller on said shaft, a tie rod having a forward end portion fixed to said impeller, and extending rearwardly through the impeller shaft concentric therewith, and formed with an annular groove adjacent to its rearward end, a threaded nipple surrounding the rearward end portion of the tie rod, in threaded engagement with the associated rearward end portion of the impeller shaft, said nipple having an inwardly directed radial projection extending into said annular groove, so that rotating said nipple relative to the shaft will axially adjust the tie rod bodily together with the impeller relative to the shaft, and locking means for securing the nipple relative to the impeller shaft and thereby securing the axially adjusted position of the impeller.

Claim 23

A centrifugal pump which comprises a hollow impeller shaft, an open type impeller mounted on the forward end portion of the shaft having torque transmitting means effective between, said shaft and said impeller while allowing for axial movement of the impeller on said shaft, a tie rod extending concentrically within said impeller shaft, and having a forward end portion connected to said impeller, adjusting means effective between said tie rod and said impeller shaft, constructed and arranged so as to be operable for adjustably shifting said tie rod together with said impeller axially relative to said impeller shaft, locking means for securing the axially adjusted position of the tie rod relative to the impeller shaft, a housing section surrounding the impeller, having a body portion provided with sealing means for the impeller shaft extending therethrough, and having a cover portion connected to said body portion, and formed with an inlet neck and an outlet neck, a bearing section fixedly connected to the housing section, supporting the impeller shaft, and means for securing the impeller shaft against axial displacement relative to said bearing section.

Claim 24

A centrifugal pump which comprises a hollow impeller shaft, an open type impeller mounted on the forward end portion of the shaft having torque transmitting means effective between, said shaft and said impeller while allowing for axial movement of the impeller on said shaft, a tie rod extending concentrically within said impeller shaft, and having a forward end portion connected to said impeller, adjusting means effective between said tie rod and said impeller shaft, constructed and arranged so as to be operable for adjustably shifting said tie rod together with said impeller axially relative to said impeller shaft, locking means for securing the axially adjusted position of the tie rod relative to the impeller shaft, a housing section surrounding the impeller, having a body portion provided with sealing means for the impeller shaft extending therethrough, and having a cover portion connected to said body portion, and formed with an inlet neck and an outlet neck, a bearing section fixedly connected to the housing section, supporting the impeller shaft, and means for securing the impeller shaft against axial displacement relative to said bearing section.

Claim 25

In a centrifugal pump, a rotor assembly which comprises a hollow impeller shaft, an open type impeller mounted on the forward end portion of the shaft having torque transmitting means effective between, said shaft and said impeller while allowing for axial movement of the impeller on said shaft, a tie rod extending concentrically within said impeller shaft, and having a forward end portion fixedly connected to said impeller, adjusting means effective between said tie rod and said impeller shaft, constructed and arranged so as to be operable for adjustably shifting said tie rod together with said impeller axially relative to said impeller shaft, and locking means for securing the axially adjusted position of the tie rod relative to the impeller shaft.

Claim 26

In a centrifugal pump, a rotor assembly which comprises a hollow impeller shaft, an open type impeller mounted on the forward end portion of the shaft having torque transmitting means effective between, said shaft and said impeller while allowing for axial movement of the impeller on said shaft, a tie rod extending concentrically within said impeller shaft, and having a forward end portion fixedly connected to said impeller, adjusting means effective between said tie rod and said impeller shaft, constructed and arranged so as to be operable for adjustably shifting said tie rod together with said impeller axially relative to said impeller shaft, and locking means for securing the axially adjusted position of the tie rod relative to the impeller shaft.