Centrifugal pump for corrosive liquids

Claim 2

A centrifugal pump particularly for corrosive liquids, comprising A. a glass pump housing having 1. an inlet at its low pressure side, 2. an outlet at its high pressure side, 3. a tubular bearing face forming one part of the inner wall of said housing, said pump housing being permanently sealed in a vacuum tight manner over its entire area, except for said inlet and outlet, B. a glass pump shaft situated in its entirety inside said housing and rotatably supported by said tubular bearing face, C. a glass impeller fastened to said shaft, D. a ferromagnetic body fixedly enclosed within said shaft and E. means disposed externally of said housing for generating a rotating magnetic field to impart rotation to said ferromagnetic body for driving said pump shaft.

Claim 3

an outlet at its high pressure side,

Claim 4

an outlet at its high pressure side,

Claim 5

A centrifugal pump as defined in claim 1, wherein said bearing face engages a mid portion of said shaft, said impeller being fastened to one end of said shaft, said shaft having, at its end remote from said impeller, an integral glass jacket enclosing said ferromagnetic body.

Claim 6

a tubular bearing face forming one part of the inner wall of said housing, said pump housing being permanently sealed in a vacuum tight manner over its entire area, except for said inlet and outlet, B. a glass pump shaft situated in its entirety inside said housing and rotatably supported by said tubular bearing face, C. a glass impeller fastened to said shaft, D. a ferromagnetic body fixedly enclosed within said shaft and E. means disposed externally of said housing for generating a rotating magnetic field to impart rotation to said ferromagnetic body for driving said pump shaft.

Claim 7

a tubular bearing face forming one part of the inner wall of said housing, said pump housing being permanently sealed in a vacuum tight manner over its entire area, except for said inlet and outlet, B. a glass pump shaft situated in its entirety inside said housing and rotatably supported by said tubular bearing face, C. a glass impeller fastened to said shaft, D. a ferromagnetic body fixedly enclosed within said shaft and E. means disposed externally of said housing for generating a rotating magnetic field to impart rotation to said ferromagnetic body for driving said pump shaft.

Claim 8

A centrifugal pump as defined in claim 1, said impeller including a hollow hub portion having an axial opening oriented towards said inlet and a plurality of open-ended impeller tubes extending radially from said hub portion, said housing including a cylindrical portion accommodating said impeller, said outlet being disposed in the wall of said cylindrical portion, the open ends of said impeller tubes registering sequentially with said outlet during the rotation of said shaft.

Claim 9

A centrifugal pump as defined in claim 1, including axial abutment means adjacent both ends of said shaft permitting a limited, relatively large axial play thereof.

Claim 10

A centrifugal pump as defined in claim 3, including axial abutment means adjacent both ends of said shaft permitting a limited, relatively large axial play thereof, the position of said impeller with respect to said outlet and the position of said ferromagnetic body with respect to said means being such that upon self-centering of said impeller with respect to said outlet during operation, said axial abutment means remaining out of contact with said shaft.

Claim 11

A centrifugal pump as defined in claim 1, wherein said bearing face includes at least one lubricating groove.

Claim 12

A centrifugal pump as defined in claim 1, wherein said shaft includes at least one lubricating groove.

Claim 13

A centrifugal pump as defined in claim 1, wherein said housing in its portion surrounding said ferromagnetic body includes an opening sealed by a removable closure member.

Claim 14

A centrifugal pump as defined in claim 2, said glass jacket having a ground outer face coaxial with the axis of said shaft and said housing having a portion surrounding said jacket, said last-named portion including a ground inner face coaxial with said axis.

Claim 15

A centrifugal pump particularly for corrosive fluIds comprising: A. an all glass integral pump housing means defining an elongated tubular bearing means, a pumping chamber on one end of said tubular bearing means and having an inlet and an outlet, and closure means adjacent said tubular bearing means, said tubular bearing means and said closure means all open to the corrosive fluid in said pumping chamber, and said housing means further being completely sealed except for said inlet and said outlet so said corrosive fluid is completely contained in said housing means, B. an all glass shaft journaled in said bearing means and having an impeller for rotation on said shaft in said pump chamber for pumping fluid entering said inlet out said outlet, and means for receiving rotational energy from a source of rotational energy enclosed within said shaft so as to be sealed against the corrosive fluids in said housing means, and C. means externally of said housing means for rotating said shaft by sending rotational energy to said means for receiving rotational energy so as to rotate said impeller to pump said corrosive fluid out said outlet.

Claim 16

A centrifugal pump particularly for corrosive fluIds comprising: A. an all glass integral pump housing means defining an elongated tubular bearing means, a pumping chamber on one end of said tubular bearing means and having an inlet and an outlet, and closure means adjacent said tubular bearing means, said tubular bearing means and said closure means all open to the corrosive fluid in said pumping chamber, and said housing means further being completely sealed except for said inlet and said outlet so said corrosive fluid is completely contained in said housing means, B. an all glass shaft journaled in said bearing means and having an impeller for rotation on said shaft in said pump chamber for pumping fluid entering said inlet out said outlet, and means for receiving rotational energy from a source of rotational energy enclosed within said shaft so as to be sealed against the corrosive fluids in said housing means, and C. means externally of said housing means for rotating said shaft by sending rotational energy to said means for receiving rotational energy so as to rotate said impeller to pump said corrosive fluid out said outlet.