US3466062A - Telescopic tubes - Google Patents

Telescopic tubes Download PDF

Info

Publication number
US3466062A
US3466062A US3466062DA US3466062A US 3466062 A US3466062 A US 3466062A US 3466062D A US3466062D A US 3466062DA US 3466062 A US3466062 A US 3466062A
Authority
US
United States
Prior art keywords
cylinder
telescopic tube
cylinders
piston
base
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
Other languages
English (en)
Inventor
Henri Deplante
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.)
Dassault Aviation SA
Original Assignee
Dassault Aviation SA
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 Dassault Aviation SA filed Critical Dassault Aviation SA
Application granted granted Critical
Publication of US3466062A publication Critical patent/US3466062A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C3/00—Wings
    • B64C3/38—Adjustment of complete wings or parts thereof
    • B64C3/40—Varying angle of sweep
    • 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
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L27/00—Adjustable joints, Joints allowing movement
    • F16L27/08—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe
    • F16L27/0861—Arrangements of joints with one another and with pipes or hoses
    • 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
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L27/00—Adjustable joints, Joints allowing movement
    • F16L27/12—Adjustable joints, Joints allowing movement allowing substantial longitudinal adjustment or movement
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86268—With running joint between movable parts of system

Definitions

  • a telescopic tube comprising a first cylinder having with a base in which an aperture is formed, a second cylinder disposed coaxially within the first cylinder in fixed relationship thereto, and a third coaxial cylinder disposed radially between the first two cylinders to slide in a sealed manner through the aperture formed in the base of the first cylinder, and a piston carried by the third cylinder to slide in a sealed manner between said first two cylinders, the third cylinder having an orifice in its cylindrical wall.
  • the Volume occupied by a fluid in such a telescopic tube varies relatively little or not at all during deformation.
  • the present invention relates to a telescopic tube.
  • a general way of effecting remote control is to employ a hydraulic circuit.
  • part of the circuit is incorporated in a deformable device.
  • the space containing the hydraulic fluid changes in volume during deformation. The result of this is undesired changes in the pressure of the hydraulic fluid, which reduces the precision of control.
  • the object of the invention is to provide a telescopic tube in which the volume occupied by the fluid varies relatively little or not at all, during deformation.
  • the telescopic tube in accordance with the invention comprises a first cylinder equipped with a base in which there is an aperture, a second cylinder parallel to the first, located inside it and fixed in relation thereto, and a third cylinder parallel to the first two and situated between them whilst being able to slide in a sealed manner through the aperture formed in the base of said lirst cylinder, said third cylinder being provided with a piston which is able to slide in a sealed manner between said first two cylinders, the third cylinder in addition containing an orifice in its cylindrical wall.
  • FIGURE la is an elevational view of one extremity of a telescopic tube in accordance with the invention.
  • FIGURE lb is an elevational section, on the brokenline Ib-Ib of FIGURE 2b, through the other extremity of the same telescopic tube;
  • FIGURE 2a is a section, taken on the line IIa--Ila of FIGURE la, of the first extremity of the telescopic tube;
  • FIGURE 2b is a section, taken on the line IIb-1lb of FIGURE lb, through the other extremity of the telescopic tube.
  • first cylinder provided with a base 11 in which there is an aperture
  • 12 indicates a second cylinder parallel to the first cylinder 10, located inside it and fixed in relation thereto.
  • the reference 13 indicates a third cylinder, parallel to the first two cylinders 10 and 12 and situated between them.
  • Two seals 14 and 15 are disposed in annular throats produced in the cylindrical internal surface of the base 11 of the first cylinder 10. These seals enable the third cylinder 13 to slide in a sealed manner through the aperture in the base 11 of the first cylinder 10.
  • the third cylinder 13 is provided, at that extremity situated between the first cylinder 10 and the second cylinder 12, which an annular piston 43 capable of sliding in a sealed manner between said two cylinders.
  • the piston 43 possesses two annular seals 44 and 45 disposed in undercuts produced in the cylindrical external surface of the piston, and a seal 46 situated in an undercut produced in the cylindrical internal surface of the piston. These three seals 46, 44 and 45 ensure that the piston 43 cooperates in sealing relationship with the first cylinder 10 and with the second cylinder 12.
  • the cylindrical wall of the third cylinder 13 is pierced by orifices 16 situated in a transverse ring and allowing communication between an annular space 47 formed between the first cylinder 10 and the third cylinder 13 and an annular space 48 formed between the second cylinder 12 and the third cylinder 13.
  • a collar 17 carried by the third cylinder 13 is situated in the neighbourhood of the orifices 16. The periphery of this collar is crenellated and fluid therefore fiows past it when the third cylinder 13 and its piston 43 are displaced. It acts as a mechanical stop, in conjunction ⁇ with the base 11 of the first cylinder 10, to limit the maximum extension of the telescopic tube formed by the above-described arrangement of cylinders.
  • the third cylinder 13 and its piston 43 are being displaced towards the right in relation to the rigid assembly constituted by the first cylinder 10 and the second cylinder 12, and if the area of the internal transverse cross section of the third cylinder 13 is designated S, it will be apparent that the volume occupied by the fluid at the right of the second cylinder 12 increases by a volume equal to the product of the longitudinal displacement of the third cylinder 13 and the area S.
  • the new equivalent resulting equation may be expressed as follows: the cross sections of the third cylinder 13, including its Wall, and of the annular space defined by the first cylinder 10 and the second cylinder 12 have substantially equal areas.
  • the telescopic tube is linking the fuselage to the swing-wing of a variable-geometry aircraft
  • the rigid part constituted by the first and second cylinders or for that matter at the other end for the rigid part constituted by the third cylinder
  • This movement is provided by creating a universal joint between one of these two rigid parts and the union.
  • a joint of this sort is illustrated in the drawing for each of -the said two rigid parts.
  • the third cylinder 13 is continued in the form of a terminal portion 49 of reduced section, containing a bore 51.
  • a first union 34 containing a bore 53 communicating with the bore 51, can swivel about the terminal portion 49 and a second union 35, containing a bore 36 communicating with the bore 53, can swivel about the first union 34.
  • Nuts 41, 42 and 5S, washers 50, 52 and 54 and seals 37, 38, 39, 40, 56 and S7 serve to fix the components together and provide sealing.
  • the second tube 12 terminates in an enlarged cylindrical portion 25 carrying a flange 24 which bears against a shoulder 20 on the first tube 10.
  • An elbow union 18 containing a bore 58 is provided, having two branches 28 and 29 at right-angles to one another, the first of which enters the enlarged portion 2S and possesses a collar 19 which bears against the ange 24 so that the union 18 can swivel about the longitudinal axis of the telescopic tube.
  • Another union 33 containing a bore 23 communicating with the bore 58, can swivel about the arm 29 of the union 18. Nuts 21, 30 and 22 and seals 26, 31 and 32 lock and seal the assembly.
  • a thrust washer is located between the nut 21 and the collar 19.
  • This washer is of the split type, the split plane being in the plane of section of the drawing (FIGURE 2a).
  • Undercuts 60 and 63 are formed in the periphery of the enlarged cylindrical portion 25 and in the periphery of -the collar 19.
  • the volume 62 formed between the enlarged portion 25 and the piston 43 communicates with I claim:
  • a telescopic tube comprising a first cylinder having an apertured base, a second cylinder disposed inside in the first cylinder in fixed coaxial relationship thereto, a third cylinder coaxial with said rst two cylinders and disposed radially between them to slide in the axial direction through the aperture formed in the base of the first cylinder, said third cylinder and said aperture being in sealing relationship, and an annular piston carried by the third cylinder to slide between said first two cylinders, said piston and the walls of said first two cylinders being in sealing relationship, and the Ithird cylinder in addition having an orifice in its cylindrical wall putting into cornmunication an annular space formed between the first and third cylinders and an annular space formed between the second and third cylinders.
  • a telescopic tube as claimed in claim 1 including a universal joint to which the first and second cylinders are connected at their ends remote from the base of the first cylinder.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Joints Allowing Movement (AREA)
  • Actuator (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
US3466062D 1967-02-24 1967-07-31 Telescopic tubes Expired - Lifetime US3466062A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR96520A FR1528664A (fr) 1967-02-24 1967-02-24 Tube télescopique

Publications (1)

Publication Number Publication Date
US3466062A true US3466062A (en) 1969-09-09

Family

ID=8625947

Family Applications (1)

Application Number Title Priority Date Filing Date
US3466062D Expired - Lifetime US3466062A (en) 1967-02-24 1967-07-31 Telescopic tubes

Country Status (4)

Country Link
US (1) US3466062A (de)
DE (1) DE1625254C3 (de)
FR (1) FR1528664A (de)
GB (1) GB1188409A (de)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3572776A (en) * 1969-02-27 1971-03-30 Rockwell Mfg Co Fluid flow apparatus
US4362324A (en) * 1980-03-24 1982-12-07 Haskel Engineering & Supply Company Jointed high pressure conduit
EP0073070A1 (de) * 1981-08-20 1983-03-02 Hydraulic Technology Corporation Herstellung eines teleskopischen Zylinders
US5248172A (en) * 1992-03-31 1993-09-28 United States Of America As Represented By The Secretary Of The Army Adjustable fluid transfer apparatus
US5425225A (en) * 1994-02-08 1995-06-20 M.A.I.Bo. S.R.L. Telescopic extensible rod for agricultural tools for picking fruit from trees or for cutting off branches of trees
EP0683097A2 (de) 1994-05-14 1995-11-22 British Aerospace Public Limited Company Verbindungsvorrichtung
US5772259A (en) * 1996-09-20 1998-06-30 Robohand, Inc. Slide assembly with telescoping fluid conduits with improved sealing arrangement
US20070131105A1 (en) * 2005-10-13 2007-06-14 Dannehl Friedrich W Supply line
US20080007052A1 (en) * 2005-02-18 2008-01-10 Nobuaki Niki Connector mounting structure
US20090050330A1 (en) * 2005-10-04 2009-02-26 Gerard Papon Riser Pipe with Auxiliary Lines Mounted on Journals
US20120181787A1 (en) * 2011-01-13 2012-07-19 David Mitchell Swivel connector

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE8200615L (sv) * 1982-02-03 1983-08-04 Thore Wiklund Forbindelselenk for gas- eller vetskeformiga medier
EP0566791A1 (de) * 1992-04-24 1993-10-27 Masao Adachi Kühlevorrichtung einer Form

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2455334A (en) * 1944-12-30 1948-11-30 Glenn L Martin Co Constant volume expansible brake line

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2455334A (en) * 1944-12-30 1948-11-30 Glenn L Martin Co Constant volume expansible brake line

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3572776A (en) * 1969-02-27 1971-03-30 Rockwell Mfg Co Fluid flow apparatus
US4362324A (en) * 1980-03-24 1982-12-07 Haskel Engineering & Supply Company Jointed high pressure conduit
EP0073070A1 (de) * 1981-08-20 1983-03-02 Hydraulic Technology Corporation Herstellung eines teleskopischen Zylinders
US5248172A (en) * 1992-03-31 1993-09-28 United States Of America As Represented By The Secretary Of The Army Adjustable fluid transfer apparatus
US5425225A (en) * 1994-02-08 1995-06-20 M.A.I.Bo. S.R.L. Telescopic extensible rod for agricultural tools for picking fruit from trees or for cutting off branches of trees
US6314982B1 (en) 1994-05-14 2001-11-13 Bae Systems Plc Link apparatus
EP0683097A3 (de) * 1994-05-14 1997-09-24 British Aerospace Verbindungsvorrichtung.
EP0683097A2 (de) 1994-05-14 1995-11-22 British Aerospace Public Limited Company Verbindungsvorrichtung
US5772259A (en) * 1996-09-20 1998-06-30 Robohand, Inc. Slide assembly with telescoping fluid conduits with improved sealing arrangement
US20080007052A1 (en) * 2005-02-18 2008-01-10 Nobuaki Niki Connector mounting structure
US7401820B2 (en) * 2005-02-18 2008-07-22 Tokai Rubber Industries, Ltd. Connector mounting structure
US20090050330A1 (en) * 2005-10-04 2009-02-26 Gerard Papon Riser Pipe with Auxiliary Lines Mounted on Journals
US7762337B2 (en) * 2005-10-04 2010-07-27 Institut Francais Du Petrole Riser pipe with auxiliary lines mounted on journals
US20070131105A1 (en) * 2005-10-13 2007-06-14 Dannehl Friedrich W Supply line
CN1948715B (zh) * 2005-10-13 2011-07-27 布西鲁斯欧洲有限公司 供应管路
US20120181787A1 (en) * 2011-01-13 2012-07-19 David Mitchell Swivel connector
US8292332B2 (en) * 2011-01-13 2012-10-23 Private Brand Tools (Australia) Pty Ltd Swivel connector

Also Published As

Publication number Publication date
DE1625254B2 (de) 1978-01-05
GB1188409A (en) 1970-04-15
DE1625254C3 (de) 1978-08-31
DE1625254A1 (de) 1970-05-21
FR1528664A (fr) 1968-06-14

Similar Documents

Publication Publication Date Title
US3466062A (en) Telescopic tubes
US2838074A (en) Fluid pressure hose
US2742929A (en) Pressure storage device
US3877349A (en) Dual opposite motion extending and retracting ram fluid cylinders
US3335642A (en) Cylinder construction
US3650182A (en) Closure for fluid pressure vessel
US3419030A (en) Fast evacuation valve
US2649842A (en) Fluid pressure motor comprising relatively extensible and contractible piston and cylinder elements
US3219366A (en) Reinforced fluid control fitting
US3266383A (en) Fluid pressure operated cylinders
US4072013A (en) Fluid pressure actuated operator cylinder with incorporated stress converter
US5067521A (en) Two-way refrigeration valve with elastomeric seal
CN111022420A (zh) 一种集成式机械锁紧液压缸及系统
US2932206A (en) Twin rotary actuator
GB1322311A (en) Push-to-gether tube connector
US2806450A (en) Hydraulic actuators
US2455334A (en) Constant volume expansible brake line
US3312148A (en) Power operated steering gear
US3342111A (en) Fluid pressure actuator and locking means
US3293993A (en) Joint between a piston head and a piston rod of a fluid motor
US3303855A (en) Piston and spool valve assembly
US2858802A (en) Power transmission
US3329449A (en) Sealed swivel joint for fluid systems
CN209540116U (zh) 组合式阀的密封结构
CN104728470A (zh) 一种旁通阀