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Патент USA US2126450

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‘Aug. 9; 1938.
‘
c. cRAvENs
AUTOMATIC PUMP PIPE DRAIN MECHANISM
Filed April 12, 1937
2,126,450
‘
3 Sheets-Sheej: 1
Inventor
A itorneys v
Aug. 9, 1938»
c. CRAVEIQ‘S
2,126,450
AUTOMATIC PUMP PIPE DRAIN MECHANISM
Filed April 12, 1937
5 Sheets-Sheet 2
26”
ll
Inventor ‘
[kr/(‘z’aaena 4/
' Aiiorneys
Aug. 9, 1938.,
c. cRAvENs
2,126,450
AUTOMATIC PUMP PIPE DRAIN MECHANISM
Filed April 12, 1937
7 4
5 Sheets-S?aet 3
1' 7
72
7/
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7/ 70
7-? 6y
7‘
//
Inventor
Jézri ?awww
7!
J
6:4
‘
'
Q
7
By
A iiomeys.
2,126,450
Patented Aug. 9, 1938
PATENT OFFICE
UNiTED ’ STATES
2,126,450
AUTOMATIC PUMP PIPE DRAIN MECHANISM
Carl Cravens, Pedernal, N. Mex.
Application April 12, 1937,‘ Serial No. 136,453
6 Claims.
(01. Big-34.1)
My invention relates generally to automatic
pump pipe drain mechanism, and particularly to
drain mechanism of this‘ character especially
M adapted for use in conjunction with windmill
“5‘ pumps,v and an important object of my invention
is to providea simple, efficient, and practical
arrangement of this character operating to drain
the‘pump pipe to prevent the water freezing in
U the pump pipe and damaging the same.
10‘ ‘ Other important objects of my invention will
be apparent from a reading of the following de
scription taken in connection with the drawings,
wherein for purposes of illustration I have shown
H a preferred embodiment of my invention.
15'
In the drawings:—-
.
‘ Figure 1 is a general‘elevational view of an
embodiment of the mechanism showing the drain
valve in a closed position.
'
Figure 2 is a horizontal sectional view taken
20 through Figure 1 approximately on the line 2-2
and lookingldownwardly in the direction of the
arrows.
‘
/
Figure 3 is a top plan view of the long slide.
Figure 4 is an enlarged perspective view of the
25
smaller slide.
.
‘
Figure 5 is a transverse vertical sectional view
taken through the drain valve.
‘
V
Figure 6 is an enlarged vertical longitudinal
sectional view taken through the plunger casing.
30.
Figure '7 is a horizontal sectional view taken
through Figure 6 approximately on the line 1-1
and looking downwardly in‘the direction of the
arrows.
Figure 8 is an elevational view of the plunger.
Referring in detail to the drawings, the nu
meral 5 generally designates the pump pipe in
which is operated the pump piston (not shown)
by the pump rod 6. In- accordance with the
present invention brackets l and 8 are connected
by means of respective U-bolts 9 and Ill to the
pipe 5 to extend laterally therefrom and support
the upper and lower ends of the ‘slide channels
I0’ and l l’ which have on'their lower ends spring
45 mounting ears l2 and [3, respectively, tethering
the lower ends of the respective springs l4 and
I5 whose upper ends are connected as indicated
by the numerals l6 and Il to the smaller and
larger slides l8, l9, respectively. The smaller
50g slide it is shorter than the longer slide l9, but
both slides have the channel-shaped cross-sec
tion shown in Figures 2, 3 and 4 and include
laterally extending ?anges 2B and 2! which are
slidably confined by the channel ?anges 22 and
55 g 23.
'I'heconnection of the upper ends of the
‘
springs iii and I5, ‘to the slides normally urge the
slides downwardly. ‘
p
The slide [8 has pivoted intermediate its ends
as indicated by the numeral 24 a pivoted dog 25
which has an aperture 26 at one end and a curved ‘
bill 21 at the opposite end. A projection 23 on the
webof the slide is adapted to be engaged by ‘the
underside of the righthand part of the dog to
prevent the dog from tilting downwardly beyond
a horizontal position. The aperture 2%} receives '
a suitably formed lower end portion of a con;
necting link or rod 28 which has its upper end
pivoted‘ as indicated by the numeral 29 to a lat
erally projecting bracket 30 which is clamped on
the pump rod t‘ as shown in Figure 1 of the draw
ings, so that as the pump rod 6 is reciprocated in
the action of pumping’; the slide it and the dog
25 ‘will be operated in upward and downward
directions.
.
.
.
.
_
‘
"
‘
'
-
The lower end of the‘slide l9 “has a pivotal 20
connection 3| ‘with the upper end‘ of acoriri'ect
ing link 32 which has its lowerend‘ pivoted as in-‘‘
dicated by the numeral ‘33 to the upper end of an
angulated lever 34 whose lower end is fastened as
indicated by the numeral 35 ‘to a squared portion
on the valve shaft t??which includes the valve
part 31 turning in a [suitable cage 38 on the drain
pipe 39 which opens into the side of the pump 5'
below the bracket‘ 8. ’
. 1
'
Upper andlower brackets All and M fastened to‘ 30'
the web of the slide l9 extend laterally therefrom
and embrace and support the small plunger cyl-v
inder 42 alongside of the. slide‘ I9. ', A longer
plunger cylinder: 43 is mounted laterally out
wardly of and below the‘plunger cylinder 42 by
means of a bracket‘ Ml which is a part of‘ the
bracket 8. By means of 'this arrangement the
longer plunger cylinder 43 is stationary with re
spect tov the supporting structure, ‘while the
smaller plunger cylinder 152 is movable'with the
slide
l9.
_
‘
“
‘
’
'
‘The slide i?jhas pivoted‘ thereto as indicated
by the numeral ‘45 a generally- horizontal lever‘
which has a cut away portion 46 at its‘ lefthand
end‘ with which the bill of the "dog 25 is engage-J 45"
able in the manner indicated» in Figure -1 of the
drawings when the ‘slide i8’ comesup from a de-‘
pressed position relative to the‘ slide iii,v and‘ the
opposite end of the le'ver?’l is bifurcated to'pro
vide the armsfl? and'llilj'which have an'iipward;
andv laterally outward curvature as indicated by
the numeral 50 in Figurell of the drawings;
‘' ‘
Securely fastened to‘ the slide it above the lever
41 is a laterally projecting bracket 5|>which has
a clamp 52 on its "laterally‘outwar‘d end which is
I 2
2,126,450
fastened to the plunger rod 53 on the longer cyl
inder 43. The arm or bracket 5| overlies the lever
4'! and has at its inward end an angularly cut
away portion 54 to cooperate with the lever 41.
The- lever 41 has its bifurcated end located over
the plunger rod 55 of the small cylinder 42, the
arms 48 and 49 being located on opposite sides of
this plunger rod 55 and adapted to rest on the
head 56 of this plunger rod. Between the head
56 and the top of the cylinder 42 is a helical spring
51 which acts to raise the plunger rod 55.
The structure of the plunger cylinder 43 is
identical with that of the small plunger cylinder
42 with the exception that there is no spring 51
on the plunger rod 53 on the larger cylinder.
Therefore, description of one of the plunger cyl
inders will suffice as description for the other.
Referring to Figure 6 of the drawings, each
plunger cylinder is composed of a barrel 59 which
20 has a closed. bottom 60 and a gland 6| closing
an opening 62 in its top through which gland
works the plunger rod 63 which is tubular in form
and has passing therethrou-gh the adjusting
screw 64 which is threaded as indicated by the
numeral 65 in the rod 63 and has the smooth
portion 66 arranged in concentric spaced rela
tion with the interior of the rod 63 and depend
ing therebelow. Threaded on the lower end of the
plunger rod 63 is the valve cage 61 which has
30 holes 68 in opposed positions. A nut 69 threaded
on the lower end of the valve cage bears against
a washer 10 which holds a leather or other suit
able material cup ‘H against a top washer 12 to
provide the suction medium. A plug 13 is thread
ed into the lower end of the valve cage and works
against the bottom of a helical spring 14 which
presses against the lower end of a valve 15 which
has a closed top and an open bottom, and holes
16 which are normally out of registry with or
only partially registered with the holes 68 in the
valve cage, by adjustment of the screw 64. A pin
extending from the valve into a groove in the
interior of the valve cage keeps the valve 15
from turning in the valve cage.
If the windmill or the like is not operating, the
device 01’ the invention will have the parts there
of in lowered position wherein the petcock or
drain valve 31 will be in an open position. When
the windmill starts operating, the slide l8 will,
on the down stroke of the pump rod 6, slide down
' wardly in its ?anged guide, thereby permitting
the dog 25 to pivot slightly and slide past and
under the portion 46 of the lever 41. Then on
the upward stroke of the pump rod 6, the slide
[8 rises and the dog 25 falls into a horizontal
position and catches underneath the portion 46
of the lever 41. As the slide and the dog 25
continue upwardly, the lever 41 and the slide l9
are carried upwardly as well as the cylinder 42
60 and the plunger rod 53 of the larger cylinder 43;
as well as the lever 34; so that as the parts attain
the top of the elevated position, the valve 31
will be closed. As the pump rod 6 goes down
again, the slide l8 proceeds to the full depressed
65 position and comes up again as the pump rod
rises again. In the interim, the slide I9 sinks
slowly, possibly one-quarter or three-eighths of
an inch, but the slide l8 raises it again to the
top position. This action repeats itself as long
70 as the pump rod 6 is reciprocating, thereby keep
“ ing the valve 31 closed. If the mill stalls, as fre
quently happens on the upstroke of the piston
rod 6, the slide I 9 sinks slowly due to the fact
that the oil 18 in the lower part of the cylinder
7.5.. 56
passesupthrough the valve cage 61 very
slowly. As the slide l9 continues to sink, the dog
or lever 41 passes the dog 25 and as they meet,
the dog 41 is tilted so as to press downwardly
on the plunger rod 55 of the small plunger cyl~
inder 42 so as to cause the plunger rod 55 to sink
slowly into the cylinder 42 until the end 46 of the
lever 41 clears the protruding bill of the dog 25,
whereat the slide l8 continues on to the lowest
position, thereby opening the valve 31 and allow
ing the water in the pump pipe 5 to drain through 10
the drain pipe 39. The spring 51 raises the
plunger rod 55 to its elevated position, thereby
causing the slide H! to be ready to be picked up
again when the rod 6 begins to reciprocate again
as the mill starts pumping.
Although I have shown and described herein a
preferred embodiment of my invention, it is to be
de?nitely understood that I do not desire to limit
the application of the invention thereto, and any
change or changes may be made in the materials 20
and in the structure and arrangement of the
parts, within the spirit of the invention and the
scope of the subjoined claims.
Having described the invention what is claimed
as new is:
25
1. In combination with a reciprocating pump
rod or the like, a pump pipe in which said pump
rod works, a drain for said pump pipe, a valve
interposed in said drain and having an operating
element, operating mechanism for said operating 30
element, said operating mechanism comprising
means operatively connected between said pump
rod and said operating element, said means com
prising a ?rst member, and a second member con
nected to said operating element, said ?rst mem— 35
ber being connected for reciprocation by said
pump rod, and a. ?rst dog on said ?rst member,
a second dog on said second member, said ?rst
dog being arranged to operatively engage said
second dog to carry said second member in the
direction of movement of said ?rst member only
in one direction of movement of said ?rst mem—
her.
2. In combination with a' reciprocating pump
rod or the like, a pump pipe in which said pump
rod works, a drain for said pump pipe, a valve
interposed in said drain and having an operat
ing element, operating mechanism for said op
erating element, said operating mechanism com
prising means operatively connected between
said pump rod‘and said operating element, said 50
means comprising a ?rst member, and a second
member connected to said operating element,
said ?rst member being connected for reciproca
tion by said pump rod, and a ?rst dog on said
?rst member, a second dog on said second mem
55
ber, said ?rst dog being arranged to operatively
engage said second dog to carry said second
member in the direction of movement of said
?rst member only in one direction of movement 60
of said ?rst member, individual spring means for
urging said ?rst and second members in said one
direction of movement of said ?rst member.
3. In combination with a reciprocating pump
rod or the like, a pump pipe in which said pump
rod works, a drain for said pump pipe, a valve
interposed in said drain and having an operat
ing element, operating mechanism for said op
erating element, said operating mechanism com
prising means operatively connected between 70
said pump rod and said operating element, said
means comprising a ?rst member, and a second
member connected to said operating element,
said ?rst member being connected for recipro
cation by said pump rod, and a ?rst dog on said 75'
2,126,450
?rst member, a second dog on said second mem
ber, said ?rst dog being arranged to operatively
engage said second dog to carry said second
member in the direction of movement of said
?rst member only in one direction of movement
of said ?rst member, individual spring means for
urging said ?rst and second members in said one
direction of movement of said ?rst member, ?rst
dashpot means carried by said second member
and with which said second dog is operatively
engaged, and second dashpot means mounted
stationarily with respect to said ?rst and sec
ond members and operatively engaged only by
said second member.
4. In combination with a reciprocating pump
in
rod or the like, a pump pipe in which said pump
rod works, a drain for said pump pipe, a valve
interposed in said drain and having an operat
ing element, operating mechanism for said op
erating element, said operating mechanism com
prising means operatively connected between
said pump rod and said operating element, said
3
cation by said pump rod, and a ?rst dog on
said ?rst member, a second dog on said second
member, said ?rst dog being arranged to opera
tively engage said second dog to carry said sec
ond member in the direction of movement of
said ?rst member only in one direction of move
ment of said ?rst member, individual spring
means for urging said ?rst and second members
in said one direction of movement of said ?rst
member, ?rst dashpot means carried by said
second member and with which said second dog
is operatively engaged, and second dashpot
means mounted stationarily with respect to said
?rst and second members and operatively en
gaged only by said second member, said ?rst and 15
second dogs being pivoted respectively to said
?rst and second members, and second spring
means operatively engaged with said ?rst dash~
pot means in opposition to said second dog.
6. In combination with a reciprocating pump 20
rod or the like, a pump pipe in which said pump
rod works, a drain for said pump pipe, a valve
means comprising a ?rst member, and a second
interposed in said drain and having an operat
member connected to said operating element,
said ?rst member being connected for recipro
?rst member, a second dog on said second mem
ing element, operating mechanism for said op
erating element, said operating mechanism com 25
prising means operatively connected between
said pump rod and said operating element, said
ber, said ?rst dog being arranged to operatively
means comprising a ?rst member, and a second
engage said second dog to carry said second
member in the direction of movement of said
?rst member only in one direction of movement
of said ?rst member, individual spring means
for urging said ?rst and second members in
said one direction of movement of said ?rst
member, ?rst dashpot means carried by said
second member and with which said second dog
member connected to said operating element,
said ?rst member being connected for recipro 30
cation by said pump rod, and a ?rst dog on
cation by said pump rod, and a ?rst dog on said
is operatively engaged, and second dashpot
means mounted stationarily with respect to said
?rst and second members and operatively en
gaged only by said second member, said ?rst
and second ‘dogs being pivoted respectively to
said ?rst and second members.
5. In combination with a reciprocating pump
rod or the like, a pump pipe in which said pump
rod works, a drain for said pump pipe, a valve
interposed in said drain and having an operat—
ing element, operating mechanism for said op
said ?rst member, a second dog on said second
member, said ?rst dog being arranged to opera
tively engage said second dog to carry said sec
ond member in the direction of movement of 35
said ?rst member only in one direction of move
ment of said ?rst member, individual spring
means for urging said ?rst and second mem
bers in said one direction of movement of said
?rst member, ?rst dashpot means carried by said
second member and with which said second dog
is operatively engaged, and second dashpot
means mounted stationarily with respect to said
?rst and second members and operatively en
gaged only by said second member, said ?rst 45
and second dashpot means each comprising a
closed cylinder containing hydraulic ?uid, a pis
ton above the ?uid, a plunger rod connected to
prising means operatively connected between i said piston, and an adjusting rod extending
said pump rod and said operating element, said through said plunger rod, a valve in said piston, 50
a spring positioning said valve in opposition to
means comprising a ?rst member, and a second
member connected to said operating element, said adjusting rod.
CARL CRAVENS.
said ?rst member being connected for recipro
erating element, said operating mechanism com
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