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Патент USA US2105251

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Jan. 11, 1938.
H. F. MacMlLLlN
' 2,105,251
HYDROMEGHANICAL MOTOR
Filed June 1, 1935 .
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J'rwwléw
HOWARD F- MHC MILLIN,
“woman
Patented Jan. 11,
2,105,251
UNITED “STX'TES PATENT OFFICE
2,105,251.
_
mnoivmonANroAL Moron
Howard F. MacMillin, Mount Gilead, Ohio, as
signor, by mesne assignments, to The Hydraulic
Press Corporation, Inc., Wilmington, Del., a
corporation of Delaware
Application June 1, 1933, Serial No. 673,872
3 Claims. (Cl. 121-38)
This invention relates to hydro-mechanical conduit 43. The ?uid pressure admitted through
the'above connections forces the piston 46 down
motors, and in particular, to devices for guid
ing and retracting the plungersof such motors wardly and forwardly, pushing the ram 35 for
One object of this invention is to provide a. ward along its ‘chamber Si, by means of the pis
5 ‘hydro-mechanical motor operable in one-direc ‘ ton {rod 36 attached thereto. Any ?uid escap- 5
tion to advance a platen or ram, and retractable ing by the piston 46‘, or otherwise entering, the
in the opposite direction, byymechanism consist left-hand end, of the cylinder chamber 44, is
returned to the tank through the conduit 49.
ing of a tie member urged along guide mem
' ‘The pressure ?uid forces the piston 46 solely
in a forward direction. To retrieve the piston 10
46 and the ram 35 connected to it by the pis
Another object is to provide a hydro-mech?n- _ fton rod’36," retrieving means are arranged as
' ical motor, as described in the preceding'para ‘ shown in Figures 1, 2 and 3. Secured in the end‘
graph, wherein the tie member is, provided with plate 52 of the ram chamber 3! are a pair of
' bers byv means of the coil springs, or similar
10 yielding means, and including a ?exibleelement
passing over pulleys in the‘ tie member.
‘15 ‘an aperture through which vthe motor cylinder
' . loosely passes, thereby enabling the motor cylin
der to serve as an additional guide member dur
ing the reciprocation of the tie member.
53 loosely pass. The sliding plate 55 likewise
contains a. pair of rectangular slots 51, in which 20
chanical motor and retraction mechanism of this ‘are arranged rotatable pulleys 58, around each
QIn the drawing:
20
guide rods 53, around each of which a helical 15 '
compression spring 54 is coiled. Arranged to
-slide to and fro on the guide rods 53 is avplate
» 55, through the holes 56 of which the guide rods
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Figure 1 is a side elevation of the hydro-me
invention.
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Figure 2 is a vertical sectionv along-the line
of which passes a chain 59. One end of each
chain 59 is secured to a hook 6!], anchored in
the end plate 52 of the ram chamber 3|, where
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Figure 3 is a top plan view of the'hydro-me- ' as the opposite end of each chain is secured to’ '25
the movable ram 35by another (hook (it an
chanical motor shown in Figure 1.
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2—2in Figure 3.
Referring to the drawing in‘ detail, Figures chored therein and passing through an aperture
1, 2 and 3 show the hydro-mechanical motor of
this invention as consisting of a housing 33 con
62 in the end plate 52.
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In operation, when the ram 35 is forced for
,ward through the‘action of the pressure ?uid 30
upon, the‘piston 46, it' pulls the chains 59 with
The latter is opened by releasing the latch 33, it, causing the sliding plate 55 to move down
'30 taining a hollow ram chamber 3i, to which ac
cessis obtained by way of the coverv plate 32.
and‘ swings upward on its hinge 34 (Figure 2). . ward upon the guide rods 53, compressing the
‘ Reciprocably mounted within the ram. chamber helical ‘spring 54. When the .r?uid pressure is
35 M is a-movable ram 35, attached to a, piston rod. ' released the energy stored up in the helical
36 as by the set screw 31 in a hollow socket 38.
The piston rod 35 passes through a stumng box
39-, havingma packing 40 adaptedto prevent the
passage of liquid out of the ram chamber 3!.
Beyond the stu?ing box 39 the piston rod 35 passes
through a drainage chamber 4! with a drain
age conduit 42 leading back to the ?uid tank, or
other source from which the working?uid is ob
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tained. The piston rod 33 then ‘passes through
45
a bore 43 and enters a cylinder
chamber 44, sit
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uateii in‘ the interior of a hydraulic cylinder 45.
" 1 I The drainage chamber 4| and the conduitv 42 are
adapted 'to receive ?uid escaping from the cyl
inder chamber 44 through the .bore 43, and to
50 convey it back to the ?uid tank.‘
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The piston rod 36 terminates-“in apiston 46
‘which is adapted to reciprocate. in the cylinder
chamber 44.. To provide this piston reciproca
tion, ?uid pressure is admitted to ‘the cylinder‘
55schamber 44 through the coupling 41 and the
springs 54 forces the sliding plate 55 backward,
causing the chains 59 to pull the ram 35 back to
its starting position. .When the piston 46 and
the ram 35, connected to it, have been forced
downwardato their extreme forward position, the 40
piston 46 uncovers the port 63, thereby permitting
the pressure ?uid to rush outward through the,
conduit 34 to any other hydraulic apparatus which
may be desired under certain circumstances to
operate in sequence with the previously described 45
apparatus, and forming no part of the present
invention.
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It will be understood that I desire to compre
hend within'm'y invention such modi?cationsv as
may be‘necessary to adapt it to varying condi
tions and‘uses.
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_ Having thus fully described my invention, what
I claim as new and desire to secure by'Letters
Patent is:
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1. In combination, a frame, a hydraulic cyl
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2,105,251
inder thereon, a plunger-therein, a platen on
said plunger, guide members amnged on oppo-v
site sides of said plunger, a tie member mounted
tie member to an anchorage at the opposite end
of said ?exible member, and yielding means ar
ranged to urge said tie member in a direction
adapted to oppose the working stroke of said
plunger, said guide members including a pair of
rods arranged substantially parallel with the axis
relationship therewith whereby the vcylinder. is" of reciprocation of said plunger whereby to cause
I adapted to assist the guide members in retaining" the tie member, plunger and guide members to
the tie member in its proper position and pathr‘ot occupy the minimum space.
10 motion, a ?exible member secured at one end to
3. In combination; a frame, a hydraulic cyl 10
for reciprocation along said guide members and
having an aperture substantially surrounding the
outer surface of said cylinder in relatively slidable
sa'idmlaten and passing'movably over said tie
,member to an anchorage at thevopposite end of
said ?exible‘ member, and yielding means ar-
ranged to urge said tie member in a direction
15 adapted to oppose the working stroke of said
"plunger.-
‘
inder thereon, a plunger therein, a platen on said
plunger, guide members varranged on opposite
.sides of said plunger, a tie member mounted for
reciprocation along said guide members'and hav
ing an aperture substantially surrounding the 15
outer surface of said cylinder in relatively slid
able relationship therewith whereby the cylinder
2. In combination, a frame, a hydraulic cyl
inder thereon, a plunger therein, a platen on said is adapted to assist the guide members in re
plunger, guide members arranged on ‘opposite taining the tie member inits’proper position’ and
20 sides 01’ said plunger, a tie member mounted for path 01' motion,,a pair of, pulleys mounted on 20
said tie member, a pair of ?exible members se
reciprocation along said guide members and hav
ing an. aperture substantially surrounding the cured to said platen and passing over said pulleys
to anchorages at their opposite ends, and yieldouter surface of said cylinder in relatively slid
able relationship therewith whereby the cylinder I ing means arranged to urge said tie member
in a direction adapted to oppose the working‘ 25
is adapted to‘assist the guide'members in retain
ing the tie member in its proper position and
path of motion, a ?exible member secured at one
end to said platen and passing movably over said
stroke 01 said plunger.
HOWARD F. MicmLLm."
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