US3826596A - Rotary piston machine with splined internal shaft - Google Patents

Rotary piston machine with splined internal shaft Download PDF

Info

Publication number
US3826596A
US3826596A US00343444A US34344473A US3826596A US 3826596 A US3826596 A US 3826596A US 00343444 A US00343444 A US 00343444A US 34344473 A US34344473 A US 34344473A US 3826596 A US3826596 A US 3826596A
Authority
US
United States
Prior art keywords
rotary piston
piston machine
collar portions
stator
bolts
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00343444A
Inventor
G Hansen
R Christensen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Danfoss AS
Original Assignee
Danfoss AS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Danfoss AS filed Critical Danfoss AS
Application granted granted Critical
Publication of US3826596A publication Critical patent/US3826596A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/10—Outer members for co-operation with rotary pistons; Casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/103—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member one member having simultaneously a rotational movement about its own axis and an orbital movement
    • F04C2/105—Details concerning timing or distribution valves

Definitions

  • ABSTRACT rotary piston type machine of the type which utilizes a gerotor mechanism for the expansible chambers. 1n the prior art the ring member of the gerotor normally or often has seven internally extending teeth and holes are normally provided in the seven teeth to accommodate seven screw bolts used for clamping together the casing parts.
  • the gerotorring member is clamped between two side disks which in turn are disposed in counterbores of concentric casing collar portions which collar portions are in axially spaced relation to each other when in their clamped positions. Only four screw bolts are utilized for clamping together the casing parts and these bolts are positioned radially externally of the gerotor ring member and the two side disks thereof.
  • the invention relates to a rotary pistonmachine having a splined internal shaft and an outer stator, in the form of an'annulus and preferably interposed between side discs, clamping between two housing parts which are urged towards each other by screw-bolts.
  • clamping housing parts and any side discs present have approximately the same circumferentialdimem sions.
  • the clamping screw-bolts extend through corresponding holes in the outerstator and in the side discs. Each bore is located near the crest of a tooth on the stator. This results in a corresponding reduction in the strength of the stator and in the need for a number of screw-bolts corresponding to the number of teeth on the stator.
  • the object of the invention is to provide a rotary piston machine of the initially stated kind in which there is greater freedom as regards the arrangementof the clampingscrew bolts.
  • this object is achieved by the clamping housing parts each being provided with an their associated collars, but will not be pressed outwardly through a gap between the stator and the part adjacent thereto.
  • a side disc carries, in a central bore, a bearing bush on which is mounted a valve disc which is connected to and rotates with-the rotor and which, together with the side disc, formsa distributor valve and is pressed in the axial direction against the side disc. Since the side disc is centred by the centreing collar and in turn carries the valve disc with the aid of the bearing bush, this arrangement results in a distributor valve that is very'precisely centred.
  • FIG. 1 shows a longitudinal section through a rotary piston machine in accordance with the invention
  • FIG. 2 is an end view from the right, a square flange being shown at the left-hand side and a circular one at the right-hand side, and FIG. is a transverse section taken on line Ill-III of FIG. 1.
  • stator is centred independently of the clamping screw-bolts.
  • the screw-bolts can be placedin any position in relation to the teeth-Excellent centreing is achieved since only two centreing surfaces between each clamping housing part and the stator and extending concentrically with the axis'of the machine are present.
  • the stator may have a smaller diameter and/or greater strength.
  • the cylindrical periphery of thestator carries a flange of smaller thickness through which the screw-bolts pass with clearance. This flange bridges the gapbetween the'centreing collars of the two clamping housing parts and increases the strength and rigidity of the stator.
  • screw-bolts can be provided at the corners of a rectangle or square.
  • the screw-bolts can then be disposed substantially outwardly of the periphery of the stator without this resulting in any increase in the height and width of the machine.
  • the periphery of the flange preferably matches the crosssectional form of the clamping housing parts. ln this connection considerable advantage accrues if at least one clamping housing part is of substantially square cross-section and if the screw-bolts are disposed at the corners of the square.
  • the end-walls of the stator or that end-wall of each of the side discs that is presented to the stator contain a groove which extends along the periphery and in which a sealing ring is fitted.
  • Each of these sealing rings is likewise enclosed within . If the illustrated machine is to be used as a motor, then pressurized fluid is supplied to it selectively through one of the ports 1 or and low-pressure fluid is discharged through the other port 2 or 1, whilst driving power is taken from a shaft 3. If a driving torque is applied to the shaft' 3, the machine can also be used as a pump.
  • the housing has two clamping parts 4 and 5 between which are positioned an outer stator 6 and two side discs 7 and 8.
  • the stator 6 has a cylindrical periphery 12.
  • the diameter of the stator and the diameters of the side discs 7 and 8 are the same as one another.
  • the part 4 has a centreing collar 13 which extends over the periphery of the side disc 7 and the adjacent portion of the periphery 12 of the stator in a sliding fit.
  • the housing part 5 has a centreing collar 14 which surrounds the periphery of the side disc 8 and the adjacent periphery 12 of the stator, likewise in a sliding fit.
  • the peripheral portion 12 of the stator carries a flange 15 of smaller width than the stator; this flange bridges the gap between the centreing collars 13 and 14 and increases the strength of the stator 6.
  • the shanks of the clamping screw-bolts 9 lie outwardly of the cylindrical periphery 12 of the stator 6. Bores or recesses 16are formed in the flange 15 to accommodate the shanks of the screw-bolts.
  • the housing part4 is closed at one end by a coverplate 17.
  • the housing part carries a double roller hearing 18 with the help of which is mounted a hollow portion 19 of the shaft 3.
  • a toothed portion 20 of this hollow shaft portion 19 is a toothed head 21 of a first universal-joint shaft 22, the opposite toothed head 23 of which meshes with a toothed portion 24 of a rotor 25 which takes the form of a toothed ring.
  • the teeth of this rotor form displacement chambers 27 which here take the form of cylindrical insets and which, with the aid of a distributor valve, are connected in the correct sequence to the ports 1 and 2 respectively.
  • side disc 8 carries, in an internal bore, a bearing bush 3 28 on which is mounted a rotating valve disc 29.
  • This valve disc 29 is connected to the rotor by way of a second universal-joint shaft 30 and rotates with the-rotor, a first toothed head 31 of this universal-joint shaft meshing with the toothed portion 24 of the rotor, and a second toothed head 32 with a toothed portion 33 of the valve disc 29.
  • a plunger 34 presses the valve disc 29 tightly against the side disc 8.
  • a central stud 35 performs the function of an axial stop for the universaljoint shaft 30and prevents axial loads from being transmitted to the valve disc 29 or to the plunger 34.
  • the side disc 8 has axially extending passages 36 each of which is associated with the base of a tooth of the stator 6. The precise angular position is achieved by means of a pin 53.
  • the valve disc 29 has alternately valve openings 37 which communicate with the port 1, and valve openings 38 which communicate with the port 2.
  • the number of valve openings 37 and 38 is in each case equal to the number of teeth on the rotor 25.
  • a passage 39 in the valve disc 29 extends from each valve opening 37 to an annular groove 40. This groove communicates with an annular chamber 42 by way of passages 41 in the pressure plate 34, the number of which passages 41 corresponds to the number of axially extending passages 36.
  • the annular chamber 42 is formed between the clamping housing part 5 and the plunger-34; it communicates directly with the port ll.
  • Each of the valve openings 38 communicates by way of an inclined passage 43 with an annular chamber 44 which surrounds the valve disc 29. This annular chamber communicates directly with the port 2.
  • the plunger 34 is guided on two concentric surfaces 45 and 46 and is prevented from rotating by a peg 47.
  • the plunger is pressed in the axial direction against the valve disc 29 by one or more springs 48 and by the pressure obtaining in the annular chamber 42 and in the annular gap 54 associated with the annular chamber 44, so that the valve disc 29 is pressed tightly against the side disc 8.
  • each of the side discs 7 and 8 that is presented to the stator 6 has a groove 49 and 50 respectively, each groove extending from the circumference of the disc, and a sealing ring 51 and 52 respectively being inserted in each groove.
  • These sealing rings prevent pressurized fluid from escaping across the interfaces between the stator 6 and the side discs 7 and 8; the sealing rings themselves, however, cannot be pressed outwardly by the fluid pressure.
  • a rotary piston machine comprising a casing assembly having concentric collar portions in axially spaced relation to each other, said collar portions being formed with bores and counterbores, a pair of side disks disposed respectively in said counterbores and being recessed relative to the free ends of said collars, a stator disk disposed between and in abutting engagement to said side disks, said collars being in axially overlapping relation to said stator disk with the inside diameters of said collar portions and the outside diameters of said disks having the same nominal diameter, and screw bolts for clamping together said casing assembly, said screw bolts being positioned radially externally of said nominal diameter.
  • stator disk includes a radially extending flange portion in axially spaced relation to said collar portions.
  • a rotary piston machine according to claim 1 wherein at least one of said collar portions has a generally rectangularly shaped outer periphery.
  • a rotary piston machine according to claim 2 wherein said flange portion has a generally rectangularly shaped outer periphery.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Rotary Pumps (AREA)
  • Hydraulic Motors (AREA)

Abstract

The invention relates to a rotary piston type machine of the type which utilizes a gerotor mechanism for the expansible chambers. In the prior art the ring member of the gerotor normally or often has seven internally extending teeth and holes are normally provided in the seven teeth to accommodate seven screw bolts used for clamping together the casing parts. In the machine hereof the gerotor ring member is clamped between two side disks which in turn are disposed in counterbores of concentric casing collar portions which collar portions are in axially spaced relation to each other when in their clamped positions. Only four screw bolts are utilized for clamping together the casing parts and these bolts are positioned radially externally of the gerotor ring member and the two side disks thereof.

Description

United States Patent [191 Hansen et al.
[ ROTARY PISTON MACHINE WITH SPLINED INTERNAL SHAFT [75] Inventors: Gunnar Lyshoj Hansen, Nordborg; Rolf Christensen, Sonderborg, both of Denmark [73] Assignee: Danfoss A/S, Nordborg, Denmark- [22] Filed: Mar. 21, 1973 [2]] App]. No.: 343,444
[30] Foreign Application Priority Data Apr. 26, 1972 Germany 2220391 52 us. Cl 418/61 B [51] Int. Cl. F04c 17/06 [58] Field of Search 418/61 B, 132, 133
[56] References Cited UNITED STATES PATENTS 3,270,681 9/1966 Charlson 418/61 B 3,385,057 5/1968 Pruvot 418/61 B 1451 July 30, 1974 Primary Exdminer-C. J. Husar Assistant Examiner-Leonard Smith [57] ABSTRACT The invention relates to a rotary piston type machine of the type which utilizes a gerotor mechanism for the expansible chambers. 1n the prior art the ring member of the gerotor normally or often has seven internally extending teeth and holes are normally provided in the seven teeth to accommodate seven screw bolts used for clamping together the casing parts. In the machine hereof the gerotorring member :is clamped between two side disks which in turn are disposed in counterbores of concentric casing collar portions which collar portions are in axially spaced relation to each other when in their clamped positions. Only four screw bolts are utilized for clamping together the casing parts and these bolts are positioned radially externally of the gerotor ring member and the two side disks thereof.
5 Claims, 3 Drawing Figures PATENTEDJULSOIHH SHEET 1 or 2 s i? i? 5% l ROTARY PISTON MACHINE WITH SPLINED INTERNAL SHAFT The invention relates to a rotary pistonmachine having a splined internal shaft and an outer stator, in the form of an'annulus and preferably interposed between side discs, clamping between two housing parts which are urged towards each other by screw-bolts.
In the known arrangements of this kind, the stator,
the clamping housing parts and any side discs present have approximately the same circumferentialdimem sions. The clamping screw-bolts extend through corresponding holes in the outerstator and in the side discs. Each bore is located near the crest of a tooth on the stator. This results in a corresponding reduction in the strength of the stator and in the need for a number of screw-bolts corresponding to the number of teeth on the stator.
The object of the invention is to provide a rotary piston machine of the initially stated kind in which there is greater freedom as regards the arrangementof the clampingscrew bolts.
According to the invention, this object is achieved by the clamping housing parts each being provided with an their associated collars, but will not be pressed outwardly through a gap between the stator and the part adjacent thereto.
It is very advantageous if a side disc carries, in a central bore, a bearing bush on which is mounted a valve disc which is connected to and rotates with-the rotor and which, together with the side disc, formsa distributor valve and is pressed in the axial direction against the side disc. Since the side disc is centred by the centreing collar and in turn carries the valve disc with the aid of the bearing bush, this arrangement results in a distributor valve that is very'precisely centred.
The invention willnow be described in greater detail by reference to a preferred embodiment illustrated in the drawing, in which:
FIG. 1 shows a longitudinal section through a rotary piston machine in accordance with the invention,
FIG. 2 is an end view from the right, a square flange being shown at the left-hand side and a circular one at the right-hand side, and FIG. is a transverse section taken on line Ill-III of FIG. 1.
axially extending centreing collar which surrounds a cylindrical peripheral zone of the stator, and one of the side discs if present, and by the screw-bolts being located substantially externally of this peripheral zone.
In this construction the stator is centred independently of the clamping screw-bolts. The screw-bolts can be placedin any position in relation to the teeth-Excellent centreing is achieved since only two centreing surfaces between each clamping housing part and the stator and extending concentrically with the axis'of the machine are present. In otherwise similar conditions, the stator may have a smaller diameter and/or greater strength.
In some cases it is advantageous if the cylindrical periphery of thestator carries a flange of smaller thickness through which the screw-bolts pass with clearance. This flange bridges the gapbetween the'centreing collars of the two clamping housing parts and increases the strength and rigidity of the stator.
. A particularly great advantage of this arrangement is seen to reside in the fact thatthe number of screw-bolts may be smaller than the number of teeth on the stator. Whereas in the case of a stator having seven teeth, it has hitherto been necessary to provide seven screwbolts, it is now possible to employ a smaller number of screw-bolts.
In particular, four screw-bolts can be provided at the corners of a rectangle or square. The screw-bolts can then be disposed substantially outwardly of the periphery of the stator without this resulting in any increase in the height and width of the machine.
The periphery of the flange preferably matches the crosssectional form of the clamping housing parts. ln this connection considerable advantage accrues if at least one clamping housing part is of substantially square cross-section and if the screw-bolts are disposed at the corners of the square.
In a preferred arrangement, the end-walls of the stator or that end-wall of each of the side discs that is presented to the stator contain a groove which extends along the periphery and in which a sealing ring is fitted.
Each of these sealing rings is likewise enclosed within .If the illustrated machine is to be used as a motor, then pressurized fluid is supplied to it selectively through one of the ports 1 or and low-pressure fluid is discharged through the other port 2 or 1, whilst driving power is taken from a shaft 3. If a driving torque is applied to the shaft' 3, the machine can also be used as a pump.
The housing has two clamping parts 4 and 5 between which are positioned an outer stator 6 and two side discs 7 and 8. When the two clamping housing parts 4 and 5 are drawn together with the aid of four clamping screw-bolts 9, the end faces 10 and 11 of these housing parts act on the side discs and the stator and clamp these components firmly together. The stator 6 has a cylindrical periphery 12. The diameter of the stator and the diameters of the side discs 7 and 8 are the same as one another. The part 4 has a centreing collar 13 which extends over the periphery of the side disc 7 and the adjacent portion of the periphery 12 of the stator in a sliding fit. The housing part 5 has a centreing collar 14 which surrounds the periphery of the side disc 8 and the adjacent periphery 12 of the stator, likewise in a sliding fit. The peripheral portion 12 of the stator carries a flange 15 of smaller width than the stator; this flange bridges the gap between the centreing collars 13 and 14 and increases the strength of the stator 6. The shanks of the clamping screw-bolts 9 lie outwardly of the cylindrical periphery 12 of the stator 6. Bores or recesses 16are formed in the flange 15 to accommodate the shanks of the screw-bolts.
The housing part4 is closed at one end by a coverplate 17. The housing part carries a double roller hearing 18 with the help of which is mounted a hollow portion 19 of the shaft 3. In meshing engagement with a toothed portion 20 of this hollow shaft portion 19 is a toothed head 21 of a first universal-joint shaft 22, the opposite toothed head 23 of which meshes with a toothed portion 24 of a rotor 25 which takes the form of a toothed ring. Together with the teeth 26 of the stator, the teeth of this rotor form displacement chambers 27 which here take the form of cylindrical insets and which, with the aid of a distributor valve, are connected in the correct sequence to the ports 1 and 2 respectively.
For the purpose of forming the distributor valve, the
side disc 8 carries, in an internal bore, a bearing bush 3 28 on which is mounted a rotating valve disc 29. This valve disc 29 is connected to the rotor by way of a second universal-joint shaft 30 and rotates with the-rotor, a first toothed head 31 of this universal-joint shaft meshing with the toothed portion 24 of the rotor, and a second toothed head 32 with a toothed portion 33 of the valve disc 29. A plunger 34 presses the valve disc 29 tightly against the side disc 8. A central stud 35 performs the function of an axial stop for the universaljoint shaft 30and prevents axial loads from being transmitted to the valve disc 29 or to the plunger 34.
The side disc 8 has axially extending passages 36 each of which is associated with the base of a tooth of the stator 6. The precise angular position is achieved by means of a pin 53. The valve disc 29 has alternately valve openings 37 which communicate with the port 1, and valve openings 38 which communicate with the port 2. The number of valve openings 37 and 38 is in each case equal to the number of teeth on the rotor 25. A passage 39 in the valve disc 29 extends from each valve opening 37 to an annular groove 40. This groove communicates with an annular chamber 42 by way of passages 41 in the pressure plate 34, the number of which passages 41 corresponds to the number of axially extending passages 36. The annular chamber 42 is formed between the clamping housing part 5 and the plunger-34; it communicates directly with the port ll. Each of the valve openings 38 communicates by way of an inclined passage 43 with an annular chamber 44 which surrounds the valve disc 29. This annular chamber communicates directly with the port 2.
The plunger 34 is guided on two concentric surfaces 45 and 46 and is prevented from rotating by a peg 47. The plunger is pressed in the axial direction against the valve disc 29 by one or more springs 48 and by the pressure obtaining in the annular chamber 42 and in the annular gap 54 associated with the annular chamber 44, so that the valve disc 29 is pressed tightly against the side disc 8.
That end face of each of the side discs 7 and 8 that is presented to the stator 6 has a groove 49 and 50 respectively, each groove extending from the circumference of the disc, and a sealing ring 51 and 52 respectively being inserted in each groove. These sealing rings prevent pressurized fluid from escaping across the interfaces between the stator 6 and the side discs 7 and 8; the sealing rings themselves, however, cannot be pressed outwardly by the fluid pressure.
We claim:
1. A rotary piston machine comprising a casing assembly having concentric collar portions in axially spaced relation to each other, said collar portions being formed with bores and counterbores, a pair of side disks disposed respectively in said counterbores and being recessed relative to the free ends of said collars, a stator disk disposed between and in abutting engagement to said side disks, said collars being in axially overlapping relation to said stator disk with the inside diameters of said collar portions and the outside diameters of said disks having the same nominal diameter, and screw bolts for clamping together said casing assembly, said screw bolts being positioned radially externally of said nominal diameter.
2. A rotary piston machine according to claim 1 wherein said stator disk includes a radially extending flange portion in axially spaced relation to said collar portions.
3. A rotary piston machine according to claim 1 wherein four of said screw bolts are used.
4. A rotary piston machine according to claim 1 wherein at least one of said collar portions has a generally rectangularly shaped outer periphery.
5. A rotary piston machine according to claim 2 wherein said flange portion has a generally rectangularly shaped outer periphery.
l i= =k

Claims (5)

1. A rotary piston machine comprising a casing assembly having concentric collar portions in axially spaced relation to each other, said collar portions being formed with bores and counterbores, a pair of side disks disposed respectively in said counterbores and being recessed relative to the free ends of said collars, a stator disk disposed between and in abutting engagement to said side disks, said collars being in axially overlapping relation to said stator disk with the inside diameters of said collar portions and the outside diameters of said disks having the same nominal diameter, and screw bolts for clamping together said casing assembly, said screw bolts being positioned radially externally of said nominal diameter.
2. A rotary piston machine according to claim 1 wherein said stator disk includes a radially extending flange portion in axially spaced relation to said collar portions.
3. A rotary piston machine according to claim 1 wherein four of said screw bolts are used.
4. A rotary piston machine according to claim 1 wherein at least one of said collar portions has a generally rectangularly shaped outer periphery.
5. A rotary piston machine according to claim 2 wherein said flange portion has a generally rectangularly shaped outer periphery.
US00343444A 1972-04-26 1973-03-21 Rotary piston machine with splined internal shaft Expired - Lifetime US3826596A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2220391A DE2220391A1 (en) 1972-04-26 1972-04-26 INNER-AXIS ROTARY LISTON MACHINE WITH INTERLOCKING

Publications (1)

Publication Number Publication Date
US3826596A true US3826596A (en) 1974-07-30

Family

ID=5843278

Family Applications (1)

Application Number Title Priority Date Filing Date
US00343444A Expired - Lifetime US3826596A (en) 1972-04-26 1973-03-21 Rotary piston machine with splined internal shaft

Country Status (9)

Country Link
US (1) US3826596A (en)
JP (1) JPS4954904A (en)
BE (1) BE797522A (en)
CH (1) CH574562A5 (en)
DE (1) DE2220391A1 (en)
FR (1) FR2182527A5 (en)
GB (1) GB1416201A (en)
IT (1) IT980568B (en)
SE (1) SE390053B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999054596A1 (en) * 1998-04-20 1999-10-28 White Hydraulics, Inc. Multi-plate hydraulic motor valve
WO1999054594A1 (en) * 1998-04-20 1999-10-28 White Hydraulics, Inc. Hydraulic motor plates
CN104847656A (en) * 2015-05-24 2015-08-19 浙江爱贝尔液压设备有限公司 Hydraulic pump
US10186416B2 (en) 2014-05-15 2019-01-22 Excelitas Technologies Corp. Apparatus and a method for operating a variable pressure sealed beam lamp

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2829417C3 (en) * 1978-07-05 1984-07-12 Mannesmann Rexroth GmbH, 8770 Lohr Work equipment control for a parallel and internal-axis rotary piston machine
US4451216A (en) * 1980-07-08 1984-05-29 Zaporozhsky Konstruktorsko-Tekhnologichesky Institut Selskokhozyaistvenno go Mashinostroenia Planetary hydraulic motor with stator gear hinged to a housing
US4992034A (en) * 1989-04-24 1991-02-12 Eaton Corporation Low-speed, high-torque gerotor motor and improved valving therefor
CN114278633B (en) * 2021-12-03 2024-05-28 四川航天烽火伺服控制技术有限公司 Rotary valve

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3270681A (en) * 1964-11-18 1966-09-06 Germane Corp Rotary fluid pressure device
US3385057A (en) * 1964-08-25 1968-05-28 Trw Inc Hydraulic controller

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3385057A (en) * 1964-08-25 1968-05-28 Trw Inc Hydraulic controller
US3270681A (en) * 1964-11-18 1966-09-06 Germane Corp Rotary fluid pressure device

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999054596A1 (en) * 1998-04-20 1999-10-28 White Hydraulics, Inc. Multi-plate hydraulic motor valve
WO1999054594A1 (en) * 1998-04-20 1999-10-28 White Hydraulics, Inc. Hydraulic motor plates
US6074188A (en) * 1998-04-20 2000-06-13 White Hydraulics, Inc. Multi-plate hydraulic motor valve
US6155808A (en) * 1998-04-20 2000-12-05 White Hydraulics, Inc. Hydraulic motor plates
EP1073826A1 (en) * 1998-04-20 2001-02-07 White Hydraulics Inc. Hydraulic motor plates
US6394775B1 (en) * 1998-04-20 2002-05-28 White Hydraulics, Inc Hydraulic motor seal
EP1073826A4 (en) * 1998-04-20 2004-05-19 White Hydraulics Inc Hydraulic motor plates
US10186416B2 (en) 2014-05-15 2019-01-22 Excelitas Technologies Corp. Apparatus and a method for operating a variable pressure sealed beam lamp
CN104847656A (en) * 2015-05-24 2015-08-19 浙江爱贝尔液压设备有限公司 Hydraulic pump

Also Published As

Publication number Publication date
GB1416201A (en) 1975-12-03
BE797522A (en) 1973-07-16
JPS4954904A (en) 1974-05-28
CH574562A5 (en) 1976-04-15
SE390053B (en) 1976-11-29
DE2220391A1 (en) 1973-11-08
FR2182527A5 (en) 1973-12-07
IT980568B (en) 1974-10-10

Similar Documents

Publication Publication Date Title
US3876343A (en) Rotary piston machine for liquids
CA1173296A (en) Gerotor gear set device with integral rotor and commutator
CA1073742A (en) Gerotor gearset device
US3961562A (en) Multiple pump assembly
US3272130A (en) Multiple stage pump
EP0977933B1 (en) Fluid machine
US3826596A (en) Rotary piston machine with splined internal shaft
US2371922A (en) Variable speed hydraulic coupling
GB1236400A (en) Hydraulic rotary motors and pumps
US4219313A (en) Commutator valve construction
US4747339A (en) Radial piston machine
US3799201A (en) Distributor valve for an internally shafted orbital piston machine
JPS6118677B2 (en)
US4443168A (en) Gear machine centering arrangement
US3825376A (en) Valve arrangement for fluid pressure motor or pump
EP0261757B1 (en) Internal axis rotary piston machine with rotary valve
EP0302728B1 (en) Rotary valve plate
US4426199A (en) Rotary fluid actuated machine
US3479962A (en) Power transmission
US3875851A (en) Hydraulic motors
US4253807A (en) Fluid pressure operated wheel drive
US3637333A (en) Gear-type fluid motor or pump
EP0098377B1 (en) Gerotor type hydraulic machine
US4917585A (en) Gerotor motor or pump having sealing rings in commutator members
US3871798A (en) Rotary and orbiting piston machine with internal shaft