Radial flow type pump - Patent Review 3973867

Claims

I claim:

1. A fluid pump comprising:

a pump casing having defined therein a fluid inlet and a fluid outlet;

a rotatable drive shaft rotatably connected to said casing and rotatably driven by a motor;

a main fluid propeller of the regenerative type mounted on said drive shaft in said casing to be rotatable therewith and in fluid communication with said outlet;

an auxiliary fluid propeller of the centrifugal type mounted on said drive shaft for rotation therewith, said auxiliary fluid propeller being located between said fluid inlet and said main fluid propeller, said auxiliary propeller having fluid guiding means positioned thereon to receive fluid from said fluid inlet and guide it radially outwardly of said main fluid propeller for substantially the entire length of said fluid guiding means; and

fluid transfer means located circumferentially about said guiding means and in fluid communication with said fluid guiding means and located on said pump casing to receive fluid from said fluid guiding means and guide it radially outwardly of said main fluid propeller over substantially the entire length of said transfer means for transferring said fluid to said main fluid propeller in a manner such that said fluid moves radially outwardly of said main fluid propeller during transfer to same so that fluid movement on a fluid path from said inlet to said outlet via said propeller means is directed radially outwardly of said main propeller for substantially the entire length of said fluid path.

2. The pump defined in claim 1, wherein said auxiliary fluid propeller comprises Nylon.

3. The pump defined in claim 1, wherein said auxiliary fluid propeller comprises polypropylene.

4. The pump defined in claim 1, wherein said auxiliary fluid propeller comprises polyvinyl chloride.

5. The pump defined in claim 1, wherein said auxiliary fluid propeller comprises steel.

6. The pump defined in claim 1, wherein said auxiliary fluid propeller comprises cast iron.

7. The pump of claim 1, further including a coupling connecting said drive shaft to said motor, said coupling including a pair of connecting blocks each having at their end surfaces a corresponding rectangular cubic protuberation and a corresponding rectangular groove which groove is slightly larger than and vertically disposed with said rectangular cubic protuberations so that said protuberations can be inserted into said grooves for joining said drive shaft to said motor.

8. The pump of claim 7, wherein said coupling comprises Nylon.

9. The pump of claim 7, wherein said coupling comprises polypropylene.

10. A fluid pump comprising:

a pump casing having a fluid outlet defined therein;

a rotatable shaft mounted in said pump casing and rotatably driven by a motor;

coupling means on said shaft for connecting said motor to said shaft to rotate said shaft;

a main fluid propeller of the regenerative type mounted on said rotatable shaft for rotation therewith and in fluid communication with said outlet;

a casing cover mounted on said casing and having defined therein a fluid inlet, a curved receiving chamber located adjacent said main fluid propeller and encircling said fluid inlet to define a perimeter which is radially spaced apart from said inlet, and a plurality of spaced apart fluid guide grooves each having one end thereof defined in said perimeter and extending outwardly therefrom and being in fluid communication with said main fluid propeller to guide fluid from said inlet along a first fluid path which is directed outward of said main propeller for substantially the entire length of said path; and

an auxiliary fluid propeller of the centrifugal type mounted on said rotatable shaft for rotation therewith and received in said receiving chamber to be located adjacent said main fluid propeller and said fluid inlet, said auxiliary fluid propeller having defined therein a fluid receiving chamber located to receive fluid from said fluid inlet and a plurality of fluid guide vanes defining a plurality of spaced apart fluid passages which are in fluid communication with said fluid receiving chamber and which extend outwardly therefrom to define a second fluid path which is directed outwardly of said main propeller for substantially the entire length of that path, said fluid passages being in fluid communication with said spaced apart fluid guide grooves so that said fluid inlet and said fluid outlet are in fluid communication with each other via said auxiliary and main fluid propellers and fluid is guided along said first and second fluid paths to be directed outwardly of said main propeller so that fluid is transferred thereto in a direction which causes that fluid to move outwardly of said main fluid propeller.