LIQUID-AERATING PUMP

• US 3,807,708 A
• Filed: 06/19/1972
• Issued: 04/30/1974
• Est. Priority Date: 06/19/1972
• Status: Expired due to Term

• Current Assignee: James H. Jones
• Original Assignee: James H. Jones
• Inventors: Jones, James H.
• Primary Examiner(s): Abercrombie, Willie G.
• Application Number:
  US05/263,811
• Time in Patent Office: 680 Days
• Field of Search: 210/220,169 261/29,DIG.75,93,120,121R,121M
• US Class Current: 261/29
• CPC Class Codes: B01F 23/23231 being at least partially immersed in the liquid, e.g. in a closed circuit
• CPC Class Codes: B01F 23/23341 with tubes surrounding the stirrer
• CPC Class Codes: B01F 23/23353 the gas being sucked towards the rotating stirrer
• CPC Class Codes: B01F 23/23365 the gas being introduced at the radial periphery of the stirrer
• CPC Class Codes: B01F 23/454 by injecting a mixture of liquid and gas
• CPC Class Codes: B01F 25/314 wherein additional components are introduced at the circumference of the conduit
• CPC Class Codes: B01F 25/60 Pump mixers, i.e. mixing within a pump
• CPC Class Codes: B01F 27/1144 with a plurality of blades following a helical path on a shaft or a blade support
• CPC Class Codes: B01F 27/80 with stirrers rotating about a substantially vertical axis
• CPC Class Codes: B01F 33/503 Floating mixing devices
• CPC Class Codes: F04D 3/02 of screw type
• CPC Class Codes: F04D 31/00 Pumping liquids and elastic fluids at the same time
• CPC Class Codes: Y10S 261/75 Flowing liquid aspirates gas

Abstract

A liquid-aerating pump, particularly for fish farms, has an airliquid mixing chamber mounted in a submergible intake and a double vane helical screw impeller structure adjacent to the opening into the pump casing to effect an additional step in combining liquid and air. The pump may be used either standing upright from a foot plate or as a self-propelled craft moving over a predetermined path while aerating the water on which it is floating.

Claims

1. A submerged-intake liquid-aerating pump comprising an upstanding cylindrical casing, tubular liquid intake and discharge members communicating with said casing, the intake member projecting radially from the lower end of said casing and the discharge member projecting radially from the upper end of said casing in the direction diametrically opposed to the direction of said intake member, impeller means rotatably mounted within said casing and adapted to move liquid from said intake member to said discharge member, an air-liquid mixing chamber mounted within said intake member and partially filliNg the opening therethrough, an air intake opening communicating with said mixing chamber, and a tubular air intake member merging with said air intake opening and extending upwardly along said casing to an elevation adjacent to the axis of the tubular discharge member.

2. The liquid-aerating pump as claimed in claim 1, in which the impeller means includes a shaft axially coextensive with said casing and a first long vane defining a helical screw spiraled edgewise along the surface of said shaft between the intake and discharge members.

3. The liquid-aerating pump as claimed in claim 1, in which the casing, the intake member and the discharge member are hollow cylinders equal in internal diameter.

4. The liquid-aerating pump as claimed in claim 2, wherein the pitch of the helical screw is substantially equal to the inside diameter of the casing.

5. The liquid-aerating pump as claimed in claim 2, wherein a second short vane defining a helical screw is spiraled edgewise along the surface of a lower portion of said shaft, the pitch of said second vane being equal to the pitch of said first vane.

6. The liquid-aerating pump as claimed in claim 5, wherein the lower portion of the shaft over which said second vane is disposed extends upwardly from the lower end of the shaft for a distance less than one-half the length of the casing, and said second vane defines a path lying equidistant between the convolutions of said first vane.

7. The liquid-aerating pump as claimed in claim 6, wherein said second vane is disposed adjacent to the junction of said intake member with said casing.

8. The liquid-aerating pump as set forth in claim 1, wherein said air-liquid mixing chamber comprises a horizontally disposed cylinder open at one end and closed at the other end, said cylinder extending longitudinally along the upper interior surface of said intake member, the closed end of the cylinder being located adjacent to the outer end of the intake member, a plurality of upwardly and inwardly sloping slots extending through the wall of the cylinder from the bottom surface thereof, and a baffle associated with each slot and effective to direct liquid moving along said intake member upwardly into said cylinder, each baffle projecting outwardly along the front margin of the associated slot.

9. The liquid-aerating pump as claimed in claim 8, wherein said slots extend upwardly through the lower one-half of said cylinder.

10. The liquid-aerating pump as claimed in claim 8, in which the lowermost ends of each of said baffles terminate above the lowermost inner surface of the intake member at an elevation not less than one-half the diameter of the intake member.