US3330138A - Clothes washing machine and hydraulic transmission - Google Patents

Clothes washing machine and hydraulic transmission Download PDF

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Publication number
US3330138A
US3330138A US513262A US51326265A US3330138A US 3330138 A US3330138 A US 3330138A US 513262 A US513262 A US 513262A US 51326265 A US51326265 A US 51326265A US 3330138 A US3330138 A US 3330138A
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United States
Prior art keywords
fluid
motor
conduit
valve
pump
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Expired - Lifetime
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US513262A
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English (en)
Inventor
George E Flinn
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Borg Warner Corp
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Borg Warner Corp
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Filing date
Publication date
Application filed by Borg Warner Corp filed Critical Borg Warner Corp
Priority to US513262A priority Critical patent/US3330138A/en
Priority to GB50279/66A priority patent/GB1134429A/en
Priority to SE15350/66A priority patent/SE339206B/xx
Priority to FR86030A priority patent/FR1508406A/fr
Priority to DE1585581A priority patent/DE1585581C3/de
Application granted granted Critical
Publication of US3330138A publication Critical patent/US3330138A/en
Anticipated expiration legal-status Critical
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/30—Driving arrangements 
    • D06F37/308—Hydraulic or pneumatic speed control; Arrangements or adaptations of hydraulic or pneumatic motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H43/00—Other fluid gearing, e.g. with oscillating input or output
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S60/00—Power plants
    • Y10S60/908—Washing machine system

Definitions

  • This invention relates to a hydraulic transmission. More particularly this invention relates to a hydraulic transmission particularly adapted for use in an automatic clothes washer although use in other machines would be contemplated.
  • It is an object of this invention to provide an improved transmission for the clothes basket and agitator drive of an automatic clothes washer comprising a fluid pump operable in two directions of rotation in combination with a control system adapted to deliver fluid to a fluid motor to spin the clothes basked when the pump is operated in one direction and operative to deliver fluid pressure to a fluid motor adapted to oscillate the agitator of the washer when the pump is operated in the reverse direction of rotation.
  • an improved form of control for a hydraulic transmission for a Washer is presented in that the speed of the spinning of the clothes basket is controlled by a manually adjustable means to control the exhaust fluid from the spin motor and the speed of agitation of the agitator of the clothes Washer is controlled by a manually operated means controlling the exhaust fluid pressure from the agitator fluid motor.
  • FIGURE 1 is a schematic view of a hydraulic transmission for a clothes washer during the agitate cycle embodying the principles of the invention
  • FIGURE 2 is a schematic view showing the hydraulic transmission during the spin cycle.
  • FIGURE 3 is a cross section through the transmission in an automatic washer installation.
  • the hydraulic transmission 10 is schematically illustrated for driving the clothes basket 11 and the agitator 12 of an automatic clothes Washer.
  • the hydraulic transmission has the following major components: (1) a positive displacement gear-type pump 15, (2) a positive displacement fluid motor of the gear-type 16 which is adapted to drive a hollow shaft 11a (shown schematically in FIGURE 1) connected to the clothes basket of the automatic Washer for driving same and (3) an agitating fluid motor 17 adapted to be connected to drive the agitator 12 with an oscillating type of motion.
  • a reversible electric motor 18 is connected to the pump and thereby adapted to drive the pump 15 in either direction of rotation.
  • the arrows around one of the gears of the pump 15 show the direction of rotation of one of the gear elements for either the spin cycle of the washer in which fluid pressure will be supplied to the fluid circuit for the fluid motor 16 or the agitate cycle of the washer for which fluid pressure will be supplied to the fluid circuit for the agitate fluid motor 17.
  • a fluid sump 19 is provided to contain the fluid for transmission 10.
  • a fluid conduit 20 connects the pump 15 with the spin motor 16 and a fluid conduit 21 connects the fluid pump 15 with the agitate fluid motor 17.
  • Conduit 21 is con- ICC nected to the sump 19 by a check valve 19a which allows fluid flow only in the direction from sump 19 into conduit 21.
  • Over pressure relief valves 22 and 23 are provided for the pump 15.
  • Relief valve 22 is connected by a conduit 27 to fluid conduit 20-. Relief valve 22 is also connected to a fluid conduit 21 by a conduit 28.
  • Relief valve 23 is connected to fluid conduit 21 by conduit 32 and to fluid conduit 20 by conduit 27.
  • a stop valve 35 Within the fluid circuit for the spin cycle of the clothes Washer along with the fluid motor 16 for spinning the clothes basket there is provided a stop valve 35 and a manually operable variable restriction exhaust valve 36.
  • Stop valve 35 includes a valve body 38 having ports 39, 40, 41 and 42.
  • a valve spool 43 is slidable in body 38 which has lands 44 and 45 thereon separated by groove 46.
  • a spring 47 urges the valve spool 43 to the left as viewed in FIGURE 1.
  • Exhaust fluid pressure from fluid motor 16 is connected to be delivered to port 41 of valve 35 by conduit 50.
  • Port 39 is connected to the fluid supply conduit 20 to the fluid motor 16 by conduit 51.
  • Port 40 of the valve 25 is connected to the sump by conduit 52 including restriction 53.
  • Port 42 of valve 35 is connected to the manually operable exhaust valve 36 by conduit 54.
  • Conduit 54 is connected to the sump through a restriction 55.
  • Conduit 51 is connected to the sump by check valve 56 which allows fluid flow only in the direction from the sump into conduit 51.
  • Exhaust valve 36 is schematically represented and constitutes a manually adjustable valve of the needle valve type including a tapered opening 60 which can be variably restricted by a needle 61 which is manually adjustable to allow adjustment of the flow from conduit 54. Fluid passing through valve 36 is returned to the sump 19 through a conduit 62.
  • the fluid circuit for the agitate cycle of the automatic washer includes, in addition to the agitate fluid motor 17 and the pressure supply conduit 21, a direction valve and a manually operable variable restriction exhaust valve 71.
  • the agitate fluid motor 17 includes a body 74 having a chamber 75 having a vane 76 therein which will be oscillated by the action of the fluid pressure supplied to the chamber 75.
  • the vane 76 is connected in a wash machine installation to drive the agitator 12 of the washing machine.
  • the motor 17 also includes a pair of pins 77 and 78 slidably mounted in a body 74 which engage with a rockable arm 79 which is pivoted at 80.
  • the chamber 75 has ports 81 and 82 therein at opposite sides thereof through which fluid pressure may be supplied from the direction valve 70.
  • the direction valve 70 includes a valve body 85 having a spool 86 slidable therein.
  • the valve spool 86 has lands 87, 88 and 89 thereon. Lands 87 and 88 are separated by a groove 90. Lands 88 and 89 are separated by a groove 91.
  • the valve spool 86 also includes grooves 92, 93 and 94.
  • a ball detent mechanism is provided constituting a ball 95 urged by spring 96 into engagement with either the groove 92 or 93 depending upon the position of the valve spool 86.
  • the spool groove 94 is engaged by an end portion 97 on the rocking arm 79.
  • the valve body further includes ports 101, 102, 103, 104, and 106.
  • Port 102 is connected to conduit 21.
  • Ports 101 and 106 are interconnected with port 82 of the agitate motor 17 by a conduit 110.
  • Ports 103 and 104 are interconnected with the port 81 of the agitate motor 17 by a conduit 111.
  • Port 105 is connected to the exhaust valve 71 by means of a conduit 112.
  • Conduit 112 is connected to the sump 19 through a conduit 113 having a restriction 114 therein.
  • Exhaust valve 71 is schematically illustrated and constitutes a manually adjustable valve of the needle valve type including a tapered opening 120 which can be variably restricted by aneedle 121 which is manually adjustable to vary the flow from conduit 112. Fluid passing through valve 71 is returned to sump 19 by a conduit 122.'
  • a basket brake 125 which eomprises a cylinder 126 is connected to fluid conduit 21 having a piston 127 therein;
  • a spring 130 urges piston 127 to the left as viewed in FIGURE 1.
  • Piston 127 has a pawl or projection 128 thereon engageahle in one of a plurality of matching notches in a disc 129 provided on the clothes basket 11 so that when fluid pressure exists in conduit 21 piston 127 will engage the pawl 128 to hold the basket 11 stationary.
  • Positive clutch teeth 136 are provided on a shaft 134 drivingly connected to agitator 12.
  • Mating positive clutch teeth 137 are provided-on a fluid piston 138 which is mounted in a fluid cylinder 139.
  • Fluid cylinder 139 receives fluid pressure from conduit 21.
  • a spring 140 urges piston 138 toward a disengaged position of clutch teeth 137-136.
  • the teeth 136 and 137 are engageable to provide a driving connection between agitator 12 and the oscillating vane 76 of the agitator motor 17.
  • Vane 76 is drivingly connected to piston 138 as schematically illustrated.
  • conduit 20 when the electric motor is stopped and then reversed to go into the agitate cycle as would be the case in an automatic washer through the operation of an electric timer switch mechanism, conduit 20 then becomes the fluid supply conduit or inlet conduit for pump 15 as it rotates in the direction indicated by the arrow labeled agitate. Conduit 20 will now draw fluid from the sump through check valve 56 to supply pump 15. When the fluid pressure is thus no longer supplied into conduit 20 pressure will no longer exist in port 39 a spin motor 50 is blocked and can only escape through port 40, conduit 52 and through restriction 53 to the sump.
  • valve 35 acts as a stop valve or brake by substantially restricting the exhaust 7 from the fluid motor 16 and bringing the clothes basket to a stop quickly so that the automatic washer can continue into the next cycle.
  • the valve spool 43 of valve 35 will stay in its position to the left until once more the pump is rotated in the direction labeled spin. 7
  • fluid pressure willb'e supplied into'conduit 21 to the fluid circuit for agitate motor 17.
  • Conduit 21 is connected by conduit 28 to over pressure relief valve 22 and if the fluid pressure in 21 exceeds a predetermined value, for example 200 p.s.i., the relief valve 22 will open and thereby connect conduit 28 to conduit 27.
  • a predetermined value for example 200 p.s.i.
  • Fluid pressure in conduit 21 is introduced into cylinder I V 139 moving piston 138 up to engage clutch teeth 136 and 137 and thus directly connect the .vane 76 of the agitator motor to drive the motor 12. Fluid pressure in conduit 21 will also be introduced into cylinder 126 to move piston 127 to the right to engage pawl teeth 128 with one of the notches in disc 129 to provide a positive brake on the clothes basket to hold it stationary while the agitator is oscillating. Fluid pressure in conduit 21 is also supplied to port 102 of direction valve 70.
  • valve 70 In the position of valve 70 as illustrated in FIGURE 2, fluid pressure in port 102 will flow through groove into port 103, conduit 111 and port 81 into fluid chamber 75 of agitate motor 17. At this time port 82 of fluid chamber 75 is connected through conduit 110, port'106, port 105, conduit 112, and exhaust valve 71 to the sump thus exhausting pressure ahead of the vane 76 through port 82. Thus vane 76 will move counterclockwise to the position as illustrated in FIGURE 1 due to'the fluid pressure being introduced from port 81.
  • the fluid motor '17 acts to oscillate the agitator of the wash machine by fluid pressure oscillation
  • FIGURE 3 the transmission is illustrated as installed in an automatic washer environment.
  • the location of the major elements of the transmission such as pump 15, motor 16 and agitate motor 17 is indicated in FIGURE 3.
  • a main or low pressure housing 150 is provided for the transmission having a large cavity 151 therein which can be termed a low pressure cavity.
  • the low pressure cavity 151 is enclosed by an end plate 152 which is secured to the housing 150 by suitable means such as bolts (not illustrated).
  • a high pressure housing 153 is provided which contains the transmission components of the washer.
  • the housing 153 is secured to end plate 152 by bolts 154.
  • a gasket 155 is provided between housing 153 and end plate 152 to provide a fluid seal for the housing 153.
  • a gasket 156 is provided between housing 150 and end plate 152 to provide a fluid seal therebetween.
  • End plate 152 has a bore 160 therein to accommodate the driving shaft between motor 118 and pump 15.
  • Housing 150 has a bore 160a therein to accommodate hollow shaft 11a and agitator drive shaft 134.
  • the end plate further has an outwardly extending portion 161 which houses the clutch mechanism 135 operative to drivingly engage the agitator motor 17 with agitator shaft 134.
  • the upper side of housing 153 as viewed in FIGURE 3 may be of unitary construction as a part of housing 153 or may be an end plate 162 suitably secured to housing 153 for example by bolts (not illustrated).
  • End plate 162 is provided with bores 163 and 164. Bore 163 accommodates the hollow shaft 11a to drive the clothes basket 11 and the agitator drive shaft 134.
  • Bore 164 has a projection 128 of the brake mechanism 125 slidable therein.
  • Housing 153 is a casting which would include Wall sections therein such as indicated at 165 to accommodate the components of the transmission. Indicated at 166 and located on the back side of the transmission as illustrated in FIGURE 3 provision is made for the control valves of the transmission.
  • Housing 153, end plate 162 and end plate 152 including the gasket 155 encloses a cavity which can be referred to as a high pressure cavity, generally indicated by the numeral 167. It can be seen that the high pressure fluid within the transmission will be contained by the housing 153, end plates 162 and 152 and gasket 155. Any oil which would leak from any of the transmission components within the housing 153 would leak into the low pressure cavity 151. The fluid within the low pressure cavity thus serves as a sump for the transmission and due to the seal between housing 150 and end plate 1152 including gasket 156, the oil in the low pressure cavity 151 is prevented from leaking out.
  • housing structure has been provided in which expensive sealing structures within housing 153 for main components of the transmission are not required since any oil leaking therefrom will be contained within a low pressure cavity which envelops the transmission.
  • any oil leaks from the main transmission components would not be caught by an outer housing having a low pressure cavity and thus would be quite unacceptable if such a leak developed, in that oil would leak out onto the floor where the washing machine is located.
  • the housing structure illustrated in FIGURE 3 thus is advantageous in that oil will not leak out of the wash machine onto the floor or surrounding area. Further, due to the use of a structure which would contain oil surrounding the transmission component-s, the transmission operates more quietly than is the case with known housing structures.
  • the present invention provides a simple and economical means of controlling the speed of the spin motor and an agitate motor for a washing machine.
  • the speed of either the spinning of the clothes basket or the speed of the agitation of the agitator 12 may be manually controlled between broad limits.
  • the present invention is advantageously adaptable to an automatic washing machine to provide an infinitely variable speed of agitation and an infinitely variable speed of the clothes basket during the spin cycle. Safely provisions have been included in the circuits using over pressure relief valves 22 and 23 to prevent build up of harmful pressures in the system.
  • the present invention also includes a spring urged stop valve 35 which will serve to automatically stop the clothes basket after the spin cycle by using the spin fluid motor itself as a brake on the clothes basket.
  • a hydraulic transmission having selectively operable output members comprising a first output element and a second output element, a sump for hydraulic fluid, a fluid pump connected to said sump, said pump being connected to supply fluid pressure to a first fluid circuit to drive said first output member when said pump is rotated in one direction of rotation and to supply fluid pressure to a second fluid circuit to drive said second output member when said pump is rotated in a reverse direction
  • said first fluid circuit including a first hydraulic motor connected to said first output member and hydraulically connected to said pump, an exhaust conduit for said first motor, a first selectively operable valve in said exhaust conduit adapted to variably restrict exhaust pressure from said motor to thereby control the speed of drive of said first output member
  • said second fluid circuit including a second fluid motor connected to drive said second output member and hydraulically connected to said pump, an exhaust conduit for said second fluid motor, a second selectively operable valve in said exhaust conduit for said second motor adapted to variably restrict exhaust fluid pressure from said second motor and thereby control the speed of drive of said second output member.
  • a hydraulic transmission as claimed in claim 1 including additional valve means in said exhaust conduit between said first hydraulic motor and said selectively operable valve adapted to at times interrupt the connection between said motor and said selectively operable valve.
  • said additional valve means includes a valve spool connected to said first circuit whereby fluid pressure in said first circuit urges said valve spool to a position hydraulically connecting said exhaust conduit to said first selectively operable valve and spring means urging said spool to a position interrupting said hydraulic 7 connection when no fluid pressure exists in said first circuit.
  • a hydraulic transmission having selectively operable output members comprising a first output member and a second member, a sump having hydraulic fluid 5 therein, a reversible fluid pump connected to said sump, said pump'being connected to supply fluid pressure to a first fluid circuit to rotate said first output member when said pump is rotated in one direction and to supply fluid pressure to a second fluid circuit to oscillate said second output member when said pump is rotated in the 7 reverse direction
  • said first fluid circuit including a rotary hydraulic motor connected to said first output member and hydraulically connected to said pump, an exhaust conduit for said rotary motor, a first selectively operable valve in said exhaust conduit adapted to variably restrict exhaust pressure from saidrotary motor to thereby control the speed of rotation of said first output member
  • said second fluid circuit including an oscillating fluid motor connected to oscillate said second output member and hydraulically connected to said pump, an exhaust conduit for said oscillating fluid motor, and a second selectively operable valve in said exhaust conduit adapted to variably restrict exhaust fluid pressure from said oscillating fluid motor and thereby control
  • a hydraulic transmission as claimed in claim 5 including additional valve means in said exhaust conduit for said rotary hydraulic motor adapted to at times interrupt the connection between said rotary motor and said' first selectively operable valve.
  • said additional valve means includes a valve spool connected to said first circuit whereby fluid pressure in said .first circuit urges said valve spool to a position hydraulically connecting said exhaust conduit to said first selectively operable valve and spring means urging said spool to a position interrupting said hydraulic connection when no fluid pressure exists in said first circuitJ 9.
  • a hydraulic transmission for an automatic washer having a clothes tub and anagitator a sump having hy draulic fluid therein, a reversible fluid pump connected to said sump, said pump being connected to supplyfluid pressure to a first fluid circuit to rotate said clothes tub when said pump is rotated in one direction and to sup ply fluid pressure to a second fluid circuit to oscillate said agitator when said pump is rotated in the reverse direction
  • said first fluid circuit including a rotary hydraulic motor connected to said clothes tub and hydraulically motor connected to said pump, an exhaust conduit for said rotary motor, a first selectively operable valve in said exhaust conduit adapted to variably restrict exhaust pressure from said rotary motor to thereby control the speed of rotation of said clothes tub
  • said second fluid circuit including an oscillating fluid motor connected to oscillate said agitator and hydraulically connected to said pump, an exhaust conduit for said oscillating fluid motor, and a second selectively operable valve in said
  • exhaust conduit adapted to variably restrict exhaust fluid pressure from said oscillating fluid motor and thereby control the speed of oscillation of said agitator.
  • a hydraulic transmission as claimed in claim 9 including additional valve means in said exhaust conduit between said rotary hydraulic motor and said first selectively operable valve, said additional valve means being adapted to interrupt the connection between said rotary hydraulic motor and said first selectively operable valve when said pump is supplying fluid pressure to said second fluid circuit to oscillate said agitator motor will serve as a hydraulic brake for said clothes tub.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Control Of Fluid Gearings (AREA)
  • Treatment Of Fiber Materials (AREA)
US513262A 1965-12-13 1965-12-13 Clothes washing machine and hydraulic transmission Expired - Lifetime US3330138A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US513262A US3330138A (en) 1965-12-13 1965-12-13 Clothes washing machine and hydraulic transmission
GB50279/66A GB1134429A (en) 1965-12-13 1966-11-09 Hydraulic transmission
SE15350/66A SE339206B (enrdf_load_html_response) 1965-12-13 1966-11-09
FR86030A FR1508406A (fr) 1965-12-13 1966-12-02 Transmission hydraulique notamment adaptée pour son utilisation dans une machine àlaver
DE1585581A DE1585581C3 (de) 1965-12-13 1966-12-03 Hydraulischer Antrieb fur Wasch maschinen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US513262A US3330138A (en) 1965-12-13 1965-12-13 Clothes washing machine and hydraulic transmission

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US3330138A true US3330138A (en) 1967-07-11

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US513262A Expired - Lifetime US3330138A (en) 1965-12-13 1965-12-13 Clothes washing machine and hydraulic transmission

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US (1) US3330138A (enrdf_load_html_response)
DE (1) DE1585581C3 (enrdf_load_html_response)
FR (1) FR1508406A (enrdf_load_html_response)
GB (1) GB1134429A (enrdf_load_html_response)
SE (1) SE339206B (enrdf_load_html_response)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3433035A (en) * 1967-08-07 1969-03-18 Borg Warner Hydraulic transmission for fabrictreating machines
US3533251A (en) * 1968-10-31 1970-10-13 Borg Warner Brake actuator for hydraulic transmission
US3635023A (en) * 1968-10-31 1972-01-18 Borg Warner Hydraulic transmission
US3710602A (en) * 1971-05-24 1973-01-16 Borg Warner Hydraulic transmission

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1611895A (en) * 1920-05-10 1926-12-28 John A Dienner Power-transmission device for washing machines and the like
US1932246A (en) * 1927-11-03 1933-10-24 Ind Improvements Inc Laundry machine
US2157707A (en) * 1936-01-10 1939-05-09 Ex Cell O Corp Hydraulic control valve
US2238061A (en) * 1938-05-12 1941-04-15 Manly Corp Fluid pressure system and control therefor
US2449634A (en) * 1946-06-10 1948-09-21 Visioneering Company Inc Automatic washing machine
US2574418A (en) * 1944-08-25 1951-11-06 Gen Electric Hydraulic motor actuated mechanism for spinner type washing machines and the like
US2821840A (en) * 1952-06-17 1958-02-04 Hays David Washing machine
US2918795A (en) * 1955-09-06 1959-12-29 Ramsey Corp Electro-hydraulic actuating cylinder
US3242703A (en) * 1963-08-22 1966-03-29 Emerson Electric Co Hydraulic laundry machine transmission
US3248913A (en) * 1964-03-12 1966-05-03 Emerson Electric Co Torque and speed responsive system

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1611895A (en) * 1920-05-10 1926-12-28 John A Dienner Power-transmission device for washing machines and the like
US1932246A (en) * 1927-11-03 1933-10-24 Ind Improvements Inc Laundry machine
US2157707A (en) * 1936-01-10 1939-05-09 Ex Cell O Corp Hydraulic control valve
US2238061A (en) * 1938-05-12 1941-04-15 Manly Corp Fluid pressure system and control therefor
US2574418A (en) * 1944-08-25 1951-11-06 Gen Electric Hydraulic motor actuated mechanism for spinner type washing machines and the like
US2449634A (en) * 1946-06-10 1948-09-21 Visioneering Company Inc Automatic washing machine
US2821840A (en) * 1952-06-17 1958-02-04 Hays David Washing machine
US2918795A (en) * 1955-09-06 1959-12-29 Ramsey Corp Electro-hydraulic actuating cylinder
US3242703A (en) * 1963-08-22 1966-03-29 Emerson Electric Co Hydraulic laundry machine transmission
US3248913A (en) * 1964-03-12 1966-05-03 Emerson Electric Co Torque and speed responsive system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3433035A (en) * 1967-08-07 1969-03-18 Borg Warner Hydraulic transmission for fabrictreating machines
US3533251A (en) * 1968-10-31 1970-10-13 Borg Warner Brake actuator for hydraulic transmission
US3635023A (en) * 1968-10-31 1972-01-18 Borg Warner Hydraulic transmission
US3710602A (en) * 1971-05-24 1973-01-16 Borg Warner Hydraulic transmission

Also Published As

Publication number Publication date
DE1585581B2 (de) 1973-04-19
SE339206B (enrdf_load_html_response) 1971-10-04
DE1585581C3 (de) 1973-11-08
GB1134429A (en) 1968-11-20
FR1508406A (fr) 1968-01-05
DE1585581A1 (de) 1972-05-18

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