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Патент USA US2404095

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.Fu?y E69 1946.
E. A. ROCKWELL
ACCUMULATING APPARATUS
Original‘ Filed Jan. 4. 1949
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2,404,095
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2 sheets-sheet 2
Patented July 16,1946
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2,404,095
UNITED STATES PATENT OFFICE
2,404,095
ACCUMULATING APPARATUS
Edward A..,Rockwell, Cleveland, Ohio, assignor to
The New Britain Machine Company, New
.Britain, Conn, a'corporation of Connecticut
Original application January 4, 1940, Serial No.
312,356. Divided ‘and this application October
2, 1943, Serial‘No. 504,807
9 Claims. (01. 138——,30)
.
1
My invention relates particularly to accumulators for accumulating ?uid pressures, adapted
to be used for applying pressures for any desired
purpose, as for instance in connection with auto-
2
a cylinder I3 so as to force to the left in Figs. 2
and 3, a piston I4 which is mounted by. means
of a screw I5 on a plunger 16 between which
piston I4 and plunger I6 there is a chevron pack
mobiles, airplanes, railway cars, mine locomo- 5 ing I1, of suitable material. A snap ring- stop I8
tives, etc.
for the plunger i6 is located at the left of the
The object of myinvention is to provide an
cylinder I3, which latter is screwpthreaded, and
accumulator applicable for any ‘desired purpose
provided with a pair of- ears I9 and 20, on the split
in which ?uid pressures may be accumulated in
end 0f~said cylinder I3, secured together ‘witha
an advantageous manner. A further objectis to 10 bolt 2 I, for screw-threaded attachment. to a
pm Vide an accumulator adapted to Supply a hyspring casing 22, so as to hold the screw-threaded
draulic ?uid under .a constant pressure. Anend ‘of the cylinder I3 ?xedly on the spring cas
other object is to provide an accumulator which
ing-.22. Also, above and opposite tothe ears I9
is charged up to a desired maximum previously by
‘and 20' there is a lug 22a:having a-bolt 22b-there
an intermittently acting pump, and so construct- 15 in for supporting "an end of the accumulator from
ed as to maintain the hydraulic fluid under high
the automobile chassis in anydesired ‘way. ‘The
pressures. Another object is to provide an acsaid plunger I5 rests against .the‘face of a spring
cumulatcr of an improved form which is compact
retainer. plate 23. The springicasing 22 also has
and which is provided with a spring-pressed aca split ring stop 24 for the retainer plate 23, which
cumulating means. Further objects of .myinven- 20 is also provided with‘ an internal sleeve 25‘ to act
tic-n will appear from the detailed description of
as -a guide for a plurality of Belleville spring
the same hereinafter,
.
washers 26 which are merely dished rings of
This application is adivision of my application
Ser.,No. 312,356, ?led January 4,1940, nowPatent
spring steel. As shown in the drawings,‘ the said
rings .26 are located so that the adjacent rings
No. 2,331,800, dated October 12, 194.3, upon Sys- 25 have their dished portions extendingin opposite
tem for controlling the application of power.
directions, said rings being thus carried in an an
While my invention. is capable of embodiment
nular‘chamber 21 between the.casing.22..and the
in many different forms, for the purpose of illusguide .25 at intervals along the chamber 21.. Be
tration I have shown only one form thereof in
tween groups of the spring washers ~29 there
the accompanying drawings, in which
30 are ring-shaped blocks .28 to aid in. maintaining
Fig. 1 is a diagrammatic elevation of the accu~
the alignment of the spring. washersZE. The left
mulator shown as being associated with a supply
end of the chamber 21 is . closed by. a screw
reservoir, as well as with an intermittently acting electrically driven pumpfor charging the ac-
threaded cap 29, having adjacent to a split .end
of the cap 29 a pair of ears 30 .and 3|, screw¢
cumulator;
Figs. 2 and .3 together constitute a vertical sec-
tion of the accumulator shown therein;
35 threaded to the spring casing ZZ-Yand clamped ‘to
gether by a bolt‘32, so as to .hold the ‘cap 29
tightly on the cylinder .22. Alsoyabove and op
Fig. 4 is an end elevation ofthe same, and
posits to the ears .30 and M there is a lug 32a
‘Fig. 5 is a section taken on the line 4-—4 of
having a bolt 32b therein for supporting the end
Fig. 2.
40 of the accumulator from the automobile chassis
In accordance with my invention I have proin any desired way. Bolted to the left race of
videcl therein areservoir gravity-feed tank I havthe cap 29 there is .a cylindrical switch housing
ing a ?ller opening 2, an inlet 3 for the returned
34, which extends inwardlywithin the washer26,
discharge liquid, which may be a hydraulicbrake
the same having a' removable screw-plug 35 to
?uid or any other suitable liquidand-a removable 45 permit access to the switch terminals for leads
cylindrical screen ?lter 4 located over an out36 and 31 leading to‘ the switch, terminals. A
let or‘supply opening 5 which leads by a pipe 6,
cover plate .38 is boltedtothe switch ~housing34.
having a branch inlet pipe 6a for returned disIn said cover plate 38 there is a sleeve .39 ‘having
charged liquid, to arotary pump ‘I which may,
a screw-threaded cap 49 to hold in place ‘a sleeve
for example, be any desired type ofgear pump. to .4I vwhich has a screw 42 adapted to bereceived
This is driven by an electric motor 8.
in a slot 43 in the sleeve 39. Said screw 42 also
Pressure liquid is thus suppliedfrom the pump
fastens in position an adjustable switch support
‘I by a pipe 9 to. an inlet- II! on a pressure accu~
ing .rod 44 provided with ascreW-threaded hole
mulator Ii. The pressure ?uid from the pump
45 toaid in the removal thereof. Slidably mount
8 is thence received directly in a chamber I2_in c5 ed ,on the rod 44 thereis a copper plate45 which
2,404,095
3
operates as a starting switch in the initial starting
or setting of the switch apparatus, said plate 46
being normally held in its farthest position to the
left by a light spring 4‘I. The other end of said
spring 4‘! abuts against a nut 48 on a sleeve 49
carried on the rod 44, said nut 48 having a wash
er 50 spacing it from an insulated ring 5| car
ried on the sleeve 49 and which supports two rod
shaped terminals 52 and 53 connected to said
leads 31 and 35 respectively. The copper plate 46
4
threaded into the end- of the cylinder I3. The
lower end of the cage 93 has a slotted opening 94
to permit removal thereof, the same being covered
with a screw-threaded apertured dust cap 95.
Above the cage 93 there is a screw sleeve 95a, the
adjusted position of the sleeve being maintained
by a screw 96 cooperating with a series of slots
91 in said sleeve. This adjustment of the sleeve
9511 also permits the tightening of an annular
seal 98 located above a Washer 99, the seal 98
is designed to initially close the circuit manually
being supported on the other face thereof by a
between the said two rods 52 and 53. The right
spacing member I00 which rests against an aper
hand end of the rods 52 and 53 have screw
tured sleeve I0l within which the valve member
threaded thereto conducting plates 54 and 55
9| slides. A check valve I02 is carried within
which are designed, in the automatic operation 15 the valve member 'BI and is held on its seat by a
of the apparatus, to close the circuit with a cop
spring I03. The pressure liquid which is thus
per disk 56 carried on a circuit-breaker sleeve
supplied by the force from the piston I4 is dis
51 slidable within the sleeve 49 and normally held.
charged past the check valve I02 and thence to a
towards the right in Figs. 2 and 3 by a spring
discharge port I04 leading to a pipe I05, this dis
58 to close the said circuit. It will be noted that 20 charged pressure being a uniform pressure, pref
the lead 35 is connected to one terminal 59 at
one side of the motor 8 and the other lead 31
leads to any suitable source of electrical energy,
as, for example, a battery, not shown, which
latter is also connected by a lead 69 to a terminal 25
Iii on said motor. The right-hand end of the rod
era-bly of about 500 lbs. per square inch.
An
other discharge pipe I06 conveys the pressure liq
uid at this same pressure from the discharge
port I04 to any desired part to be moved, of an
automobile or any other apparatus.
In the operation of the accumulator, it will be
understood that the same is supplied from the
of a shell 63 which is formed on the end of the
supply reservoir I which conveys the liquid by
circuit breaker sleeve 51. This shell 63 is adapt
the pipe 6 to the rotary pump 1, driven by the
ed to be moved for the automatic making and 30 electric motor 8. The liquid, placed under pres—
breaking of the pumping circuit by a ring ‘64
sure by the pump ‘I, is delivered by the pipe 9
mounted on a cylindrical member 55 carrying
to the inlet I0 of the accumulator II so that any
within the same a snap action circuit breaking
desired pressure is maintained thereby. Prefer
member 65, the inner left portion of which rests
ably, however, the accumulator is so constructed
against a spring housing 61, having a spring 63 I as to maintain a pressure, for example, of approx
Within the same carried on the outside of a sleeve
imately 1000 lbs. per square inch. The liquid,
69 which overlies a rod ‘I0, having a headed screw
under pressure, received in the inlet I0 from the
‘II and a washer 1Ia supporting near one end
pump ‘I forces the piston I4 to the left, in Figs.
thereof'a washer ‘I2 held in place by a snap ring
2 and 3, so as to place the spring Washers 26
12a to retain said spring 69 in place. ,
40 under compression. This continues until the cir
The said snap action circuit breaking member
cuit breaking member 66 passes beneath the roll
66 cooperates with two bell-crank levers ‘I3 and
ers ‘I5 and T6 so as to cause the cylindrical mem
‘I4 having rollers ‘I5 and ‘I6 thereon, which lat
ber 65 to move suddenly towards the left, thus
ter are forced against the face of the cylindrical
causing the circuit breaker sleeve 5‘! to break the
member 65 by springs ‘I‘I, resting against exten .L. LI contact between the copper disk 56 and the con
sions ‘IS on arms of the bell-crank levers ‘I3 and
ducting plates 54 and 55, so as to stop the motor
‘I4 which are carried by means of pivots 89. The
8 and the pump 1. This condition of the cir
arms ‘I9 form a part'of the switch housing 34.
cuit, including the wires 36, 31, 59, 69 and BI, will
The rod ‘I9, after passing through the snap ac—
continue until sufficient liquid has passed from
tion member 66, at the right thereof, carries a
the accumulator through the passageway 89, past
spring sleeve 8| having therein a spring .82 sup
the check valve I02 until the circuit breaking
ported on a sleeve member 83 around the rod ‘I0,
member 66 has been moved suddenly to the right
44 has a stop 62 cooperating with the interior
which latter has a shoulder 94 supporting an end
washer 85 to act as a retainer for said spring 82.
The right-hand end of the rod ‘III has a screw
thread 86 which is secured within the spring re
tainer plate 23 by means of nuts 87. Notches
88 in the face of the cylindrical member 65 also
cooperate with said rollers ‘I5 and ‘I5 so as to
hand side of the rollers ‘I5 and ‘I6 so as to permit
the spring 58 to again complete the motor cir
cuit between the copper disk 56 and the con
ducting, plates 54 and 55, whereupon the pump
‘I will again charge the accumulator.
In this
way a constant pressure is maintained in the ac
cumulator II, irrespective of the extent of with
retain the pump circuit broken when the ‘pres
drawal of the liquid therefrom through the pas
saxgeway 89. In the initial starting of the ac
sure-liquid line is broken, that is to say when the
piston I4 is at the extreme right-hand end of
cumulator it will be understood that the copper
plate 46 is arranged to be moved manually in op
the cylinder I3. However, when the said liquid
position to the spring 4'! in order to complete the
line is complete and the pump motor has been
started manually by moving the copper plate 46 to 65 circuit between the two rods 52 and 53. It will
the right, the pump will be started to supply the
be understood, also, that the liquid which has
pressure liquid therefrom to the cylinder I2 and
been supplied under pressure from the pipes I05
the piston I4 will move to the left, accordingly,
and 106, after having been used or released from
until the snap action circuit breaker 65 breaks
being under pressure, may return by the inlet 3
the circuit when the desired pressure has been
to the reservoir I or may be returned to the pump
‘I by means of the pipe to.
accumulated, so that, thus, liquid is supplied from
the cylinder I2 through a port 89 and thence
While I have described my invention above in
through radial ports 90 in a check valve sleeve 9|
detail I wish it to be understood that many
which is normally kept in elevated position by
changes may be made therein without departing
means of a spring 92 carried in a cage 93 screw 75 ‘from the spirit of the same.
2,404,095
5
I claim:
1. An accumulator for a pressure ?uid com
prising, a movable wall adapted to be moved by
the accumulation of a pressure ?uid against the
same, a series of dished members adapted to
be compressed by the movement of said wall and
when released to move said wall in the opposite
direction so as to discharge said ?uid under pres
sure, a tubular member attached to the wall
in opposite directions, adapted to be compressed
by the movement of said wall and when released
to move said wall in the opposite direction so as
to discharge said ?uid under pressure, and a
stationary immovable spring casing against which
the outside portions of said rings are guided.
6. An accumulator for a pressure ?uid com
prising, a slidable piston adapted to be moved by
the accumulation of pressure ?uid against the
around which the dished members are carried 10 same, a series of dished rings, normally dished in
opposite directions, adapted to be compressed by
and an outer stationary tublular member in which
the movement of said slidable piston and when
the dished members are externally guided.
released to move said piston in the opposite direc
2. An accumulator for a pressure ?uid compris
tion so as to discharge said ?uid under pressure,
ing, a movable wall adapted to be moved by the
accumulation of a pressure ?uid against the same, 15 a stationary immovable spring casing against
which the outside portions of said rings are
a series of dished members adapted to be com
guided, and a carrier for the dished rings asso
pressed by the movement of said wall and when
ciated with the slidable piston.
released to move said wall in the opposite direc
7. An accumulator for a pressure ?uid compris
tion so as to discharge said ?uid under pres
sure, a tubular member attached to the wall 20 ing, a piston adapted to be moved by the accu
mulation of pressure ?uid against the same, a
' around which the dished members are carried,
series of dished rings, normally dished in oppo
an outer stationary tubular member in which
site directions, adapted to be compressed by the
the dished members are guided, and means for
movement of said piston and when released to
maintaining the axial positions of the rings com
prising a spacing ring guided between the said 25 move said piston in the opposite direction so as
tubular members and located so as to separate
to discharge said ?uid under pressure, a station
the successive dished members.
ary immovable spring casing against which the
outside portions of said rings are guided, and a
plunger associated with said piston around which
-
3. An accumulator for a pressure ?uid com
prising, a movable wall adapted to be moved
by the accumulation of a pressure ?uid against 30 said rings are carried.
8. Any accumulator for a pressure ?uid com
the same, a series of dished members adapted
prising, a piston adapted to be moved by the
to be compressed by the movement of said wall
accumulation of a pressure ?uid against the same,
and when released to move said wall in the oppo
a series of dished members, normally dished in
site direction so as to discharge said ?uid under
pressure, a tubular member attached to the wall 35 opposite directions, adapted to be compressed by
the movement of said piston and when released
around which the dished members are carried,
to move said piston in the opposite direction so
an outer stationary tubular member in which
as to discharge said ?uid under pressure, a sta
the dished members are guided, and a stationary
tionary immovable spring casing against which
extension tube for receiving the dished members,
connected to the outer tube and slidable in the 40 the outside portions of said members are guided,
a plunger associated with said piston around
inner tube.
which said members are carried, and spacing
4. An accumulator for a pressure ?uid com
alignment members located between successive
prising, a movable wall adapted to be moved by
sets of members.
the accumulation of a pressure ?uid against the
45
9. An accumulator for a pressure ?uid compris
same, a series of dished members adapted to be
ing, a piston adapted to be moved by the accu
compressed by the movement of said wall and
mulation of pressure ?uid against the same, a
when released to move said wall in the opposite
series of dished rings, normally dished in oppo
direction so as to discharge said ?uid under pres
sure, a tubular member attached to the wall 50 site directions, adapted to be compressed by the
movement of said piston and when released to
around which the dished members are carried,
move said piston in the opposite direction so as
an outer stationary tubular member in which the
to discharge said ?uid under pressure, a sta
dished members are guided, a spacing ring guided
tionary immovable spring casing against which
between the said tubular members and located
the outside portions of said members are guided,
so as to separate the successive dished members,
and a stationary‘ extension tube for receiving the 55 a plunger associated with said piston around
which said rings are supported, and means for
dished members, connected to the outer tube and
maintaining the axial positions of the rings com
slidable in the inner tube.
5. An accumulator for a pressure ?uid com
prising, a movable wall adapted to be moved by
the accumulation of a pressure ?uid against the 60
same, a series of dished rings, normally dished
prising spacing alignment members located be
tween successive sets of rings.
EDWARD A. ROCKWELL.
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