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Патент USA US3051098

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Aug. 28, 1962
3,051,088
_ J. G. BAKER
PITLESS PUMP CONSTRUCTION
Filed March 18, 1959
2 Sheets-Sheet 1
66
1
INVENTOR
(257m Gordon 5m)»
BY
>¢M
ATTORNEY
Aug. 28, 1962
J, G, BAKER
3,051,088
PITLESS PUMP CONSTRUCTION
Filed March 18,- 1959
2 Sheets-Sheet 2
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INVENTOR
057m Gordon Baker
ATTORNEY
3,051,088
Patented Aug. 28, 1962
2
3,051,088
John Gordon Baker, Evansville, Wis., assignor to Baker
PITLESS PUMP CONSTRUCTION
the axis of the inside diameter of the shaft housing 15
are aligned.
The middle shaft 23 extends through bearings such
as 24 which are spaced along the axis of the shaft 23 and
Manufacturing Company, a corporation of Wisconsin
Filed Mar. 18, 1959, Ser. No. 800,150
9 Claims. ((l‘l. 103-87)
supported within the shaft housing 15 by the rubber bush
ing 25 which ?ts snugly around the bearing 24 and snugly
This invention relates to pitless well construction and
within the shaft housing 15. The shaft 23 and the inside
diameter of 15 are thereby made coaxial. The bearing
constitutes an improvement in my invention disclosed in
24 is bound to the middle shaft 23 by means of an eccen
U.S. Patent No. 2,657,637. In the structure as shown in 10 tric bushing 26 as is well known in the art. The shaft
U.S. Patent No. 2,657,637 priming of the pump is very
housing 15 has an accurately machined lower end and is
di?icult unless the discharge pipe of the pump is either
accurately threaded into the hollow spool 27 and tight
level or increasing in elevation with distance from the
ened against the ring 28‘ and the accurate shoulder 29
well. It is an object of the present invention to provide
thus aligning the axis of the inside diameter of the shaft
means for easy priming of the pump whether the dis 15 housing .15 and the impeller shaft 30. Since other ?ts
charge pipe is level, increasing in elevation or decreasing
already described align the motor shaft 31 and the middle
in elevation with distance from the well.
shaft 23 with the inside diameter of the shaft housing 15,
A second object of the invention is to provide the means
it follows that all shafts are in alignment.
of using the well casing above the pump as a funnel
The radial clearance 32 between the cap 13 and the
for priming the pump and as a means of applying hydro
inside diameter of the upper casing 11 permits the radial
static pressure for priming without bringing the priming
location of 13 on the casing 11 by the motor mount 19
water in contact with the pump bearings.
before the bolts 14 are tightened. Thus eccentricity of the
A third object of the invention is to provide a pump
axis of the upper casing 111 with respect to the impeller
motor mount for quick removal and replacement of the
axis, due to fabrication errors in alignment of the casing
motor as part of the priming procedure; for more compact 25 assembly, does not cause misalignment of the motor shaft
mounting of the motor; for improved alignment of the
motor and for sustaining the motor torque reaction with
out transmitting high frequency noise causing torsional
vibration of the (single phase) motor despite fabrication
variance in the length of the Well casing.
A further object of the invention is to provide a pump
drive shaft assembly: which permits quick uncoupling
with respect to the impeller. Moreover, substantial fabri
cation variance in length of the upper casing 11 can be
tolerated because considerable vertical displacement of
the cap 13 with respect to the motor mount 19‘ does not
impair operation of the motor.
The cap 13 is sealed to the outside diameter of 19 by
the ring 33 of a yieldable material such as rubber to
and coupling of the motor as part of the priming proce_
exclude foreign matter from the Well. If venting of the
well is necessary the plug 85 in the cap 13‘ can be replaced
might be dropped in the well; which is adapted for quick 35 with a vent pipe of construction well known in the art.
removal of the drive shaft and supporting bearings with
The pin 34 discourages vandalish removal of the motor 17.
out withdrawing the pump from the well, which avoids the
The rubber ring 35 surrounds the boss 36 extending
accumulation of water on the drive shaft bearings as the
up from the cap 13. The cavity 38 within the motor
result of condensation on the inner wall of the drive shaft
mount 19 surrounds vthe rubber ring 35 ‘so that rotation of
housing and which cooperates with the motor mount to
the motor frame about the motor shaft axis is prevented
maintain alignment of the motor and pump axes despite
and the torque reaction from the motor is sustained. The
fabrication errors in alignment of the well casing.
yielding of the rubber ring 35 prevents transmission of
dure without loose parts such as set screws or keys which
Other objects and advantages of the invention will be
apparent from the detailed description taken in conjunc
tion with the accompanying drawings wherein one em
bodiment of the principles of the improvement has been
selected for exempli?cation.
torsional vibration of the motor frame, which is particu
larly pronounced when the single phase type of motor is
45 used, and thus eliminates noise which would result if
the restraint were rigid.
The motor shaft 31 extends from the motor 17 into the
FIG. 1 is a fragmentary vertical section through a por
coupling 39 with a ‘slide ?t. Relative rotations of the
tion of a pitless pump installation showing a preferred
shafts 31 and 23 and the coupling 39 are prevented by
embodiment of the novel features of the present invention. 50 the tit-key 40. The middle shaft 23 is pressed into the
FIG. 2 is a fragmentary horizontal section through the
coupling 39. The tit 37 of the tit-key 40 prevents with~
drive shaft just above one bearing.
drawal of the key when the motor shaft 31 is withdrawn.
FIG. 3 is an enlarged portion of FIG. 1.
The middle shaft 23 and the pump shaft 30 are similarly
The well construction includes a pump which may be
coupled ‘and keyed together.
of the jet type as shown in my U.S. Patent No. 2,657,637. 55
The rubber bushing 25 has ?at sides as shown in FIG.
The construction also includes a tubular casing made up
2 to provide openings 42 between the shaft housing 15
of three parts, a lower casing 10, an upper casing 11 and
and the rubber bushing 25. Above the areas of contact
a discharge body 12 all threaded together. The upper
between the rubber bushing 25 and the shaft housing
casing 11 has a cap 13 which is secured to the casing by
15, the rubber has the chamfers 41.
means of the bolts 14. The shaft housing 15 extends
Water condensing on and ?owing down the inner
60
through the opening 16 of the cap 13. The pump drive
wall of the shaft housing 15 flows through the openings
motor 17 rests on the shaft housing 15 and is secured by
42 either directly or by way of the channel formed by
the bolts 18 to the motor mount 19. The motor 17 has
the chamfers 41 and the inner wall of the shaft housing
a machined face and male diameter 8 which ?ts a corre
15. Thus, the accumulation of condensate on the top of
sponding machined ?ange and female diameter 9 of the
the bearing is avoided.
65
motor mount ‘19 as shown in FIG. 1. The motor mount
At the lower end, the condensate ?ows through the
19 includes the neck 20, the bore 21 of which is coaxial
openings 43 in the ring 28 down through the drain pas
with the flange face and female diameters 9 and, by virtue
sages 44 and 45 to the lower chamber 46, i.e., back
of the ?ange ?t with the motor, is coaxial with the motor
into the well. The flow of condensate onto the bearing
shaft 31. The neck 20 slidably ?ts around a turned di
47 is prevented by the barrier 48 which is part of the
ameter 22 of the shaft housing 15 which is coaxial with 70 ring 28. The pump shaft 30 extends through the lower
the inside diameter of 15. Thus the motor shaft axis and
bearings 47 and the seal 75 and carries the pump impeller
3,051,058
A.I;
49. The impeller 49 is of construction similar to that
shown in U.S. Patent No. 2,576,637. The impeller 49' is
located within the pump chamber '50 which is part of
hollow. spool 27..
.
The discharge body 12 has a shoulder 51 upon which
the shoulder 52 of the ?ange 53 rests. A ring 54 of yield
able material such as rubber is compressed into the
groove around the ?ange 53 hearing against the surface
motor leads 8.3 is not necessary). The motor mount 19
and cap 13 lift off with the motor.
1e coupling 3% and
key 46 remain with the shaft 23. Now, the closure rod
72‘ is unscrewed from the aperture 67 and inserted into
the aperture 74. Next, suf?cient clean water is poured
into the upper casing 11 to continue the flow into the
aperture 67 until such ?ow substantially stops.
Excess
water is desirable to use hydrostatic pressure to speed the
?lling process.
55 to ‘form a tight seal. A similar sealing arrangement
Next the pressure gauge 64 is removed. If water runs
is used to ‘seal the upper ?ange 56 to the corresponding 10
out of the hole from which the pressure gauge was re
sealing surface 57 of the discharge body 12‘. Such con
moved, the gauge is immediately replaced. On the other
struction permits the spool with the pump contained
hand if no water appears, the hole is ?lled with clean
therein and associated parts to be withdrawn or inserted
water and the pressure gauge‘is then replaced. After
into the casing by raising or lowering the shaft housing
15. The threads 58 on the top of the shaft housing ‘15, 15 time enough has elapsed ‘for the pipes to fill, the closure
rod 72 is removed from the aperture 74 and replaced in
which are exposed when the motor 17 and mounting 19
the aperture 67, after which the motor is replaced and
are removed, are for attaching a hoist to facilitate such
the pump started.
raising or lowering.
The opening of the aperture 74, of course, drains the
The pipes ‘59 and 60 are threaded into corresponding
openings in the bottom of the spool 27 and extend down 20 excess priming water through the drain passage 45 and
into the lower chamber 46, i.e., into the well. During
into the well where they are coupled to the nozzle-ven
the priming operation with the aperture 74 closed and
turi combination 77 which is in turn coupled to the tail
water standing in the upper casing 11, the drain passages
pipe 78 and the foot valve 79 as shown in U.S. Patentv
44, 45 ‘and 76 are drained so that the hearing 47 is not
No. 2,657,637.
A delivery pipe 61 is attached to the discharge body 25 ?ooded no matter how high the water stands in the
12 and, in the typical case, extends to the dwelling
casing 11.
I claim:
through the basement wall 62 to a T connection 63 for
1. In a pitless well construction, the combination of
a pressure gauge 64. The pipe 61 continues to the pres
an upright elongated casing having an outer wall and
sure regulating valve 65 and thence to the pressure tank
66 from which the water is drawn as needed vfor use.
30 an inner wall with an upper and a second sealing sur
face, a detachable cap‘ at the upper end of said casing, a
The upper ?ange 56 of the spool 27 has an aperture
67 which when open connects the upper chamber 68 with
spool insertable into and withdrawable from. said casing
the outlet recess 69.
from the top thereof having an upper and second ?anges
The outlet recess 69 is in com
munication with the pipe 60 through the passage 70
and also in communication with the discharge pipe 61.
The lower end '71 of the closure rod 72 may be used to
tightly close the aperture 67.
The closure rod 72 at
scalable against said upper and second sealing surfaces
respectively, a ?uid delivery outlet through the wall of
said casing between said sealing surfaces, an outlet recess
formed by said spool and said casing in communication
with said outlet, an upper chamber extending between
said upper ?ange and said cap, a pump chamber within
3, 72 is shown screwed into the aperture 67 and the head
said spool having an outer and an inner wall, a centrifugal
73 is made hexagonal to facilitate rotation with a wrench
pump having an impeller disposed within said pump
inserted from above when the cap, motor mount and
chamber journaled in said spool and adapted to discharge
motor are removed. A second aperture 74 in the flange
?uid into said outlet recess, a drain passage between the
56, which is open when the pump is in operating condi
outer wall of said pump chamber and said casing, a
tion, connects the upper chamber 68 with the drain pas
sage 45 in the spool. 45 communicates with the lower 45 threaded aperture in said upper ?ange of said spool con
necting said upper chamber and said outlet recess, a sec
chamber 46. The aperture 74 is preferably threaded with
its upper end is formed into a head 73. In FIGS. 1 and
the same thread as used in the aperture 67 so that the
closure rod 72 may be screwed into either aperture.
ond threaded aperture in said upper ?ange of said spool
connecting said upper chamber and said drain passage,
means disposed within said upper chamber for alternately
opening and closing said respective apertures, a shaft
Leakage through the seal 75 is drained into the drain
passage 45 through the drain passage 76. (45 is not in
communication with the outlet recess 69.) Condensa
tion on the inner wall of the upper casing 11 drains
through the aperture 74 ‘and the drain passage 45 into
the lower chamber 46.
means carrying said impeller and extending upwardly
within said casing for actuation from a point above the
top of the casing.
Operation
In the operating condition, the closure rod 72 is tightly
for opening and closing said respective apertures com
prises a rod extending upwardly from said upper ?ange
of said spool, said rod being threaded at the lower end
inserted into the aperture 67 and the aperture 74 is open
as shown in FIG. 3. With the motor rotating the im
upper end to permit manual turning of the upper end of
2. The invention claimed in claim 1 wherein the means
to engage threads of said apertures and headed at the
peller, water is raised from the well in pipe 59 by action
of the nozzle-venturi combination 77 and ?ows through
the passage 81 into the inlet 84 of the impeller 49. The
impeller forces the water through the diffusers 82 into
the outlet recess 69 where the ?ow is divided, with part
60 said rod to engage the threads of one of said apertures
returning to the nozzle-venturi combination 77 to sus
65 an inner wall with an upper and a second sealing sur
tain the jet and the balance ?owing through the outlet
recess 69 to the discharge pipe 61 through the regulator
and close off said aperture when the other said aperture
is open.
3. In a pitless well construction, the combination of
an upright elongated casing having an outer wall and
face, a detachable apertured cap at the upper end of said
casing, a hollow spool insertable into and withdrawable
from said casing from the top thereof, having an upper
valve 65 and thence to the pressure tank 66. The regu
and a second ?ange ‘scalable against said upper and sec
lator valve ‘65 is ‘adjusted for minimum pressure which
will sustain the jet action of the nozzle-venturi combina 70 ond sealing surfaces below the ground level, a ?uid de
livery outlet through the wall of said casing between said
tion as is well known in the art.
sealing surfaces, an outlet recess between said sealing
Priming Procedure
surfaces formed by said spool and said casing in com
In order to prime the pump, the bolts 14 are removed
munication with said outlet, an upper chamber extend~
and the'motor ‘i7 is lifted oif. (Disconnecting of the 75 ing between said upper ?ange and said cap, a pump cham
5
3,051,088
6
ber within said spool having an outer and an inner wall,
a centrifugal pump having an impeller disposed Within
6. The improvement in a spool for enclosing a cen
trifugal pump and for insertion into a well casing having
said pump chamber and journaled in said spool adapted
an upper casing chamber and a pump chamber for said
pump, an outlet recess formed by said spool and said
casing, a drain passage within said spool between the
to discharge ?uid into said outlet recess, a drain passage
between the outer extremity of said pump chamber and
the inner wall of said casing, a threaded aperture in the
upper ?ange of said spool connecting said upper cham
pump chamber and the casing, said spool having an
‘upper ?ange separating on one side said upper casing
ber and said outlet recess, a second threaded aperture in
chamber and said outlet recess and separating on the
the upper ?ange of said head connecting said upper
other side said upper casing chamber and said drain
chamber and said drain passage, means disposed within 10 passage within said spool, an aperture in said upper ?ange
said upper chamber for alternately opening and closing
connecting said upper casing chamber and said outlet
said respective apertures, shaft means carrying said
recess, and a second aperture in said upper ?ange con
impeller and extending upwardly within said casing, a
necting said upper casing chamber and said drain pas
shaft housing secured to the top of said spool and ex
sage, interchangeable plug means for said apertures.
tending upwardly within said casing through the aperture 15
in said cap, and surrounding said shaft means, a motor
coupled to the upper end of said shaft means, a motor
7. The invention claimed in claim 6 wherein the aper
tures are threaded, and the plug means consists of a rod
which is threaded on one end and carries a head on the
mount secured to said motor slidably engaged with said
shaft housing, said motor ‘being removably positioned on
other end adapted for turning with a wrench.
8. In a pitless well construction having a well casing
said shaft housing.
4. The invention claimed in claim 3 wherein the means
for opening and closing said respective passages com
20 with an outer wall and an inner wall with sealing sur—
faces the combination of a spool for insertion into the
casing of the well with upper and second ?anges seal
able against said sealing surfaces to form with the casing
prises a rod threaded at one end to engage threads of
said apertures and of such length and upper shape as to
an upper chamber above said upper ?ange, a lower
permit manual turning of the upper end of said rod from 25 chamber below said second ?ange and an outlet recess
ground level to engage the threads of one of said pas
between said ?anges, said recess extending through said
sages and close off said passage, when the other said
casing wall and connecting to a ?uid delivery pipe, a
passage is open.
tubular shaft housing tightly attached to said spool, a
5. In a pitless well construction, the combination of
pump drive shaft journalled within said shaft housing
an upright elongated casing having an outer wall and an 30 on at least one bearing, said bearing surrounded by a
inner wall with an upper and a second sealing surface,
a detachable apertured cap at the upper end of said cas
bushing of yieldable material said bushing being shaped
to be alternately in contact and separated from the inner
ing, a hollow spool insertable into and withdrawable
wall of said shaft housing, said bushing and inner wall
from said casing from the top thereof having an upper
of said shaft housing thus forming passages to drain
?ange and a second ?ange scalable against said upper 35 condensate ?owing down the inner wall of said shaft
and second sealing surfaces, said sealing surfaces being
housing away from said bearings, a passage within said
underground below the frost line, a water delivery outlet
spool in communication with the interior of said shaft
through the wall of said casing between said sealing sur
housing and said lower chamber.
faces, an outlet recess between said sealing surfaces
9. The improvement in a spool for enclosing a cen
formed by said spool and said casing in communication 40 trifugal pump .and a shaft seal and for insertion into a
with said outlet, an upper chamber extending between
well casing having an outer and an inner wall, said spool
said upper ?ange and said cap, a pump chamber within
having upper and second ?anges scalable against sealing
said spool having an outer and inner wall, a centrifugal
surfaces on the inner wall of said casing to form with the
pump having an impeller disposed within said pump
casing an upper chamber above said upper ?ange, a
chamber journaled in said spool and adapted to discharge 45 lower chamber below said second ?ange and an outlet
into said outlet recess, an aperture in the upper ?ange
recess between said ?anges, said recess extending through
of said spool connecting said upper chamber and said
the casing wall .and connecting to a ?uid delivery pipe,
outlet recess, a drain passage starting in a second aper
an aperture in said upper ?ange connecting said upper
ture in said upper ?ange and continuing through the
chamber and said outlet recess, a ?rst drain passage
spool through said second ?ange to the lower chamber,
starting in a second aperture in said upper ?ange and
rod means extending upwardly within said upper cham
continuing through the spool to the lower chamber, and
ber from the upper ?ange of said spool for manually
a second drain passage starting above said seal and con
alternately opening and closing from ground level said
necting to said ?rst drain passage below said second
respective apertures in said upper ?ange, shaft means
aperture.
carrying said impeller and extending upwardly within 55
said casing and through the aperture in said cap, a shaft
housing secured to the top of said spool and extending
upwardly within said casing through the aperture in said
References Cited in the ?le of this patent
UNITED STATES PATENTS
cap and surrounding said shaft means, a motor slidably
1,745,547
coupled to the upper end of said shaft means, a motor 60 12,478,941
mount secured to said motor adapted to slidably engage
2,657,637
said shaft housing, said motor mount being removably
positioned on said shaft housing, means engaged with
said motor mount for preventing said motor frame from
turning.
65
2,688,929
2,827,855
2,850,982
2,896,544
Layne _______________ __ Feb. 4,
Piccardo ____________ __ Aug. 16,
Baker _______________ __ Nov. 3,
Schleyer ____________ __ Sept. 14,
Rankin _____________ __ Mar. 25,
Fabrin _______________ __ Sept. 9,
Ogles et al. ___________ __ July 28,
1930
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