Plunger. Page: 2 of 3
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UNITED STATESPATENT OFFICE.
HARRY E. KARNES, OF BATSON, TEXAS.
PLUNGER.Specification of Letters Patent. Patented Sept. 14, 1909.
Application filed October 22, 1908. Serial No. 458,946.To all whom it may concern:
Be it known that I, HARRY E. KARNES, a
citizen of the United States, residing at
Batson, in the county of Hardin and State of
5 Texas, have invented certain new and use-
ful Improvements in Plungers, of which the
following is a specification.
My invention relates to new and useful
improvements in plungers and more par-
10 ticularly to that class of plungers used in
working barrels in water and oil wells.
The object of the invention is to produce
a device of this character which will allow
battering without loosening the cups and
15 rings or spreading the base of the plunger
barrel in such a manner that it will be of no
further use.
Another feature of the device resides in
the fact that all the threads are at the upper
20 end of the plunger barrel, thus lessening the
danger of the cups being dropped from the
plunger barrel and causing the threading to
be damaged.
Another object of the invention is to pro-
25 vide means whereby the standing valve may
be so connected with the plunger as to per-
mit the standing valve to be withdrawn at
the same time the rods with the plunger
attached are taken out.
30 Finally the object of the invention is to
produce a device of the character described
that will be strong, durable, compact, effi-
cient and one in which the parts will not be
likely to get out of working order.
35 Witlh the above and other objects in view
the iniveution has relation to certain novel
features of construction and operation which
will be more fully understood as the nature
of the invention is more minutely described,
' 0 an example of which is given in this speci-
fication and illustrated in the accompanying
drawings; wherein the figure is a sectional
view of my complete plunger with an en-
larged bushing showing means for with-
45 drawing the standing valve with the plunger.
Referring more particularly to the draw-
ings, the numeral 1 designates the bushing.
Q designates the crown and 3 the ball which
seats in valve seat 4 which is reversible and
50 is driven in bushing 1. This bushing is
provided with an inward shoulder 5 to stop
valve seat at a proper depth and is con-
nected to a barrel 7 by means of inward
threads in bushing and outward threads on
55 the upper end of the said barrel.
The lower end of the barrel is providedwith projections 8 which flare from the in-
side outwardly and are designed to fit snugly
over the top of the crown of the lower or
standing valve, when the plunger is lowered 60
and is so designed that it will not bind and
will reduce the jar to a minimum.
Numeral 9 designates the cup rings over
which the valve cups 10 fit when assembled
on barrel 7. 11 designates a shouldered base 65
which supports 9 and 10 in proper position
on barrel 7.
The construction of my device is as fol-
lows:-The barrel 7 is provided at its base
with a shoulder 11 and flanges 8 at the lower 70
end and is threaded at its upper end. Valve
cups are placed on the cup rings, and these
are then placed on the barrel with the
flared edges of both the cup rings and the
valve cups toward the threaded end of the 75
barrel until a desired number of cup rings
and valve cups have been placed on the
barrel, when a locknut 13 is screwed down on
the barrel until it comes in contact with the
valve cups and holds the valve cups and cup 80
rings in proper position. Then bushing 1
is screwed onto the threaded end of the bar-
rel. A double valve seat 4 is driven into this
bushing until its rib strikes the end of the
barrel. This valve seat is provided with a 85
centrally located annular rib 12 between
its ends so that when it is desired to ex-
change ends with said valve seat the rib 12
of the valve seat will come in contact with
the upper edge of the bushing. This rib and 90
the edge of the bushing as well as the shoul-
cler in the bushing should be ground joints
so that there will be no leakage between seat
and bushing when the ball seats in the valve
seat. The ball 3 is placed on valve seat and 95
the crown 2 is then screwed down on the
bushing which completes the plunger.
Particular attention is called to the man-
ner in which both the barrel threading and
inward bushing threading is done, that is, 100
the outward threading tapers toward the
end of the barrel while the inward threading
tapers toward the center of the bushing.
This is for the purpose of allowing the parts
to be screwed together tighter as the threads 105
become worn which is not true of the
plungers now in common use. Attention is
also called to the fact that space is provided
between the nut and the bushing for the
purpose of allowing the bushing to be tight- 110
ened when threads become worn.
Particular attention is also called to the934,184.
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Karnes, Harry E. Plunger., patent, September 14, 1909; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth512945/m1/2/: accessed July 6, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.