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lOct. 8, 1,946.
J. F. McGLONE
2,408,795
~coru'nor. mms FoR FLUID PRESSURE uoToRs
Filèd Harsh 22, 1944
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2 sheets-sheet 1
oct. 8,'1946.
.1.V F. McGLoNE
2, v
I
'CONTROL MEANS FOR FLUID PRESSURE Mo'roRs- '
Filed March 22, 1944
.
,795 '
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2 vSheets-Sheet 2
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Inventor*
dba/v E' MSGLONE.
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QAM.
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Patented Oct. y8, ‘i946
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MEANS FOR rtm1) reirse-Unir4
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vMo'rons
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`.reims F. Meolone, sañniego, Calif.
- ¿ `Application March 22, 1941i,V Serial No. 527,563
, 2
spectively, whichflead to a fluid
' This invention relates to reciprocating fluid
reservoir, I not
4
pressure motors and has rfor one of yitsimportant
objects the provision of a means for c_ontrolling
shown.
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’
I _The__piston rods ‘I and IBMare connected to
gether outside of their cylinders by a connecting
and regulating lthe extent of movement of the
power piston of such a motor,
,
. rod 22. .This rod is rigidly„secured. at v23 to the
Ul
Q
connecting rod v'I and .has its Vopposite end bi
Another object is to provide a simple and eni
cientV means, whereby’the stroke of the power
furcated or forked to fit'voveracollar 25` between.
its shoulders 25 and 2l, thus permitting'- the con
piston of a fluid pressure motor may be positively
necting rod IS to rotate relative to rod 22.
controlled and regulated.
,
'
The outer end of the rod 22 is square and re
Another object is to provide a control means 10
ceives
thereon a sleeve 28 having a crank 29 pro
of the above kind that may be readily rendered
vided
with a handle 3U. The sleeve 28 has a
inoperative for allowing the power piston to oper
square bore in order to snugly ñt over the square
ate with its normal full stroke.
_,
portion of the rod I6, and in the crank 29 is an
These and other objects will appear from the
aperture
32 through which a bolt 33 passes. Bolt
following speciñcation, when considered in con
33 receives a wing nut 34 which, when tightened,
nection with the accompanying drawings, in
will hold the crank ñrmly against movement, the
bolt 33 passing through a slot 36 of a graduated
arcuate gauge bar 35.
trolling and regulating means embodying the 20 The operation of the motor and control means
therefor is as follows:
present invention.
Assuming the parts are in the positions illus
Figure 2 is a vertical section taken on the line
trated ‘in Figure 5, but with the piston valve I5
2-2 of Figure 1.
turned so that its groove I9 does not register with
Figure 3 is a perspective view of the control
which:
i
Figure l is a View in side elevation, illustrating
a lluid pressure motor provided with a stroke con
conduits I2 and I3, the conduit IIJ will act as an
intake, supplying the fluid pressure to the for
Figure 4 is a perspective view of the adjusting
ward side of the piston 6 for moving it rearwardly
lever for the control piston valve.
to
the position shown by the dotted lines'. Dur
Figure 5 is an enlarged view, partly in section
ing this stroke the conduit II acts as an outlet.
on line 5-5 of Figure 2.
By reversing the ñow of the fluid, as indicated
Referring in detail to the drawings, the nu 30
by the dotted arrows, the piston 6 will be moved
piston valve.
meral I indicates a base having a standard 2 on
back to its original position, ‘and during this
which is mounted a control cylinder 3, Posi
stroke the conduit II is the intake and conduit
tioned above the control cylinder is a work cyl
I0 the outlet. The conduits III and II are con
inder ¿I mounted on another standard 5, and hav
nected
to any preferred type of selector valve.
ing therein a power piston 6. The piston B has
While the above action is taking place, the
the usual piston rod 1 attached thereto, said rod
blank or ungrooved portion of the face of the
extending through a gland 8 in-one of the cylin
piston valve I5 is presented to the lower ends of
der heads 9. Leading into opposite ends of the
the conduits I2 and I3, thereby, rendering the
cylinder 4 are the conduits I0 and I I, respectively.
control means inoperative. As long as this blank
Also leading from the opposite ends ofthe cyl 40 portion is maintained in the named position, the
inder 4 are the outlet conduits l2 and I3, re
motor would perform in its usual manner.
spectively.
Y
If, for example, it is desired to utilize one-half
The outlet conduits, I2 and I3, communicate
of the full stroke of the work piston 6, the handle
with the control cylinder 3 intermediate the ends 45 30 should be moved in an arc of 90 degrees, thus
of the latter, and movable in cylinder 3 is an
giving a one-quarter turn to the piston valve I5
elongated control piston valve I5, having a piston
and thereby moving half of the groove I9 out of
rod I6 that extends through a gland I1 in one of
the path of the conduit I2. In this position, the
the heads I8 of cylinder 3.
groove I9 will not cooperate with the conduit I2
Control piston valve I5 is longer than the full 50 to release the pressure within the power cylinder
stroke of power piston 6, and has a longitudinal
4, until the piston valve I5 has been moved one
groove I9 therein that extends diagonally across
half its length, at which point the groove I9 and
one side of its cylindrical surface.
_ ,
Communicating with opposite ends of the con
trol cylinder 3 are outlet conduits 20 and 2|, re
the outlet conduit I2 will come into alignment
55 for releasing pressure in the work cylinder 4
3
2,408,795
through the groove I9 and conduit 20 to the stor»
age tank or reservoir.
As the two piston rods 'I and I6 are connected
by the rod 22 they will move in unison, and there
fore when the operative point of the groove I9
cooperates with the outlet I2 the work piston B
wi11 have moved one-half of its stroke and will
stop at this point. It will be seen that the degree
of turning of the piston I5 will determine whenthe groove I9 and outlet I2 will register, thereby
enabling the operator to control the length of the
stroke of the piston 6 to any degree desired. The
same operation can be had for movementA of pis
ton 6 in the opposite direction, at which time the
registration of groove I9 with conduit I3 is con
trolled.
When the control piston valve has been rotated
to the desired position, accidental turning thereof
may be avoided by tightening the wing nut 34.
By referring t0 Figure 3 the outlet end 50 of
groove I9 can be seen as extending all the way
to this end of the piston valve I5. The groove
I9 does not extend all the way to the opposite end
of the piston valve, thus providing the ungrooved
end portion 5I which will prevent discharge of
the fluid, behind the piston valve I5. Any slight
seepage behind piston valve I5 Will be drained by
theV conduit 2 I. ,
Having described the invention, what is claimed
as new is:
In combination, a double-acting ñuid pres
sure motor comprising a power cylinder having a
power piston therein, a rod connected to said
power piston and extending through one end of
said power cylinder, a pipe for the inlet or outlet
of pressure fluid at each end of said power cyl
inder, and means to vary the stroke of said power
piston including a control cylinder, a rotatably
adjustable elongated control piston valve recip
rocable in said control cylinder, means connect
. ing said control piston valve to the power piston
for travel therewith in the same direction, said
control piston valve having a longitudinal diag
onally disposed groove therein, said groove being
closed at one end of the control piston valve and
open at the other end thereof, exhaust conduits
connecting the ends of the power cylinder with
the intermediate portion of the control cylinder,
and means to rotatably adjust said control piston
Valve to` vary the point of registry of the exhaust
conduits with said groove, said control cylinder
having a vent at one end and a fluid outlet at the
other end in constant communication with the
open end of said groove.
JOHN F. MCGLONE.
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