Submerged pump having a shaft isolator

Details Submerged pump having a shaft isolator Submerged pump having a shaft isolator

2000-07-12

2001-11-13

Koczo, Michael (Department: 3746)

Pumps

Motor driven

Electric or magnetic motor

C415S229000

Reexamination Certificate

active

06315530

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to vertical liquid medium pump system and an apparatus on the vertical liquid medium pump system to control the amount of entrained air that enters the liquid medium and not adversely affect the pump itself and the corresponding apparatus which the liquid medium is pumped to.
BACKGROUND OF THE INVENTION
Vertical liquid medium pump systems (hereinafter “Pumps”) have been made for years. Conventional Pumps have been described in numerous patents. Some of these patents are U.S. Pat. No. 5,076,762 (Inventor: Lykes et al.), U.S. Pat. No. 4,854,828 (Inventor: Haentjens), U.S. Pat. No. 4,772,183 (Inventor: Durden), U.S. Pat. No. 4,394,140 (Inventor: Liljestrand), U.S. Pat. No. 3,936,221 (Inventor: Lobanoff), U.S. Pat. No. 3,782,860 (Inventors: DeLancey et al.), U.S. Pat. No. 3,179,827 (Inventor: Baker), U.S. Pat. No. 2,766,602 (Inventor: Lung), U.S. Pat. No. 2,149,602 (Inventor: Horvath), U.S. Pat. No. 1,801,103 (Inventor: Mummert), and U.S. Pat. No. 1,709,478 (Inventor: Layne), which are all hereby incorporated by reference for disclosing various embodiments of the conventional Pumps. An example of the Pump used in a preferred embodiment of the present invention is Model VCRE, which is made by Buffalo Pumps, Inc. of North Tonawanda, N.Y., the assignee of this application.
The Model VCRE has been manufactured by Buffalo Pumps, Inc. for the last thirty (30) years and is illustrated in FIG.
1
.
FIG. 1
illustrates the conventional elements found on Pumps
8
. The conventional elements include a motor support
10
, a pump shaft
12
, a pumping section
14
, a casing cover
16
, a guide bearing
18
and a connecting column
20
. The pump shaft
12
extends from the motor support
10
into the pumping section
14
. Mounted on the pumping section
14
is the casing cover
16
(a portion of the top section of the pumping section
14
) which has an aperture
22
. The aperture
22
receives the pump shaft
12
and within aperture
22
is the guide bearing
18
. The guide bearing
18
ensures the pump shaft
12
remains in the proper position but does so by not being in constant contact with the pump shaft
12
.
The connecting column
20
connects the motor support
10
to the pumping section
14
, and obviously surrounds the pump shaft
12
. The connecting column
20
has a plurality of bottom apertures
24
to allow a priming instrument
26
to apply a desired medium to the pump shaft
12
within the pumping section
14
, and at least one upper aperture
28
so the pumped medium
7
does not contact the motor support
10
.
A problem with the conventional pump
8
is that when the pump shaft
12
rotates the pumped medium
7
, the pump shaft
12
creates a vortex of the pumped medium
7
in the connecting column
20
. The vortex draws air into the . pumped medium
7
which results in the air becoming entrained within the medium
7
. The entrained air-medium
7
is then dispersed throughout the entire pumped medium
7
. Such a result is undesirable because it is known to those skilled in the art that entrained air-medium, at certain levels, adversely affect the operation of other instruments
30
that receive the pumped medium
7
.
SUMMARY OF THE INVENTION
The cited problem, and others not mentioned above, is solved by the present invention. The present invention is directed to a pump system. The pump system has a motor, a pump shaft, a pumping section, a connecting column, and a shaft isolator. The motor rotates the pump shaft and has a bottom surface above a desired medium. The pumping section has a top surface that receives the pump shaft and pumps the desired medium to a predetermined instrument. The connecting column surrounds a predetermined portion of the pumpshaft and connects the motor support and pumping section together. The shaft isolator is positioned between the connecting column and the pump shaft, and extends from the top surface of the pumping section to a predetermined height above the desired medium and below the bottom surface of the motor support. The resulting pumped medium has an acceptable amount of entrained air that will not adversely affect the predetermined instrument.


REFERENCES:
patent: 1550194 (1925-08-01), Zimansky
patent: 1577737 (1926-03-01), Lalyne et al.
patent: 1704362 (1929-03-01), Johnson
patent: 1709478 (1929-04-01), Layne
patent: 1801103 (1931-04-01), Mummert
patent: 2149602 (1939-03-01), Horvath
patent: 2569741 (1951-10-01), Arutunoff
patent: 2766696 (1956-10-01), Lung
patent: 2783400 (1957-02-01), Arutunoff
patent: 2854595 (1958-09-01), Artunoff
patent: 3179827 (1965-04-01), Baker
patent: 3475634 (1969-10-01), Bogdanov et al.
patent: 3782860 (1974-01-01), DeLancey et al.
patent: 3854064 (1974-12-01), Dunbar
patent: 3936221 (1976-02-01), Lobanoff
patent: 4394140 (1983-07-01), Liljestrand
patent: 4772183 (1988-09-01), Durden
patent: 4854828 (1989-08-01), Haentjens
patent: 4992689 (1991-02-01), Bookout
patent: 5076762 (1991-12-01), Lykes et al.
patent: 5134328 (1992-07-01), Johnatakis et al.
patent: 5203080 (1993-04-01), Bookout
patent: 5367214 (1994-11-01), Turner, Jr.
patent: 5509791 (1996-04-01), Turner
patent: 5796197 (1998-08-01), Bookout

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