EP0496966A1 - Vérin - Google Patents

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Publication number
EP0496966A1
EP0496966A1 EP91119727A EP91119727A EP0496966A1 EP 0496966 A1 EP0496966 A1 EP 0496966A1 EP 91119727 A EP91119727 A EP 91119727A EP 91119727 A EP91119727 A EP 91119727A EP 0496966 A1 EP0496966 A1 EP 0496966A1
Authority
EP
European Patent Office
Prior art keywords
piston
casing
packing
shaft
actuator
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.)
Withdrawn
Application number
EP91119727A
Other languages
German (de)
English (en)
Inventor
Silvio Carmeli
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0496966A1 publication Critical patent/EP0496966A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/02—Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member
    • F15B15/06—Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member for mechanically converting rectilinear movement into non- rectilinear movement
    • F15B15/068—Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member for mechanically converting rectilinear movement into non- rectilinear movement the motor being of the helical type

Definitions

  • the present invention relates to an actuator, i.e. to a device by means of which another mechanical arrangement can be operated by imparting movements to mechanical elements forming part of the said other arrangement. More particularly the invention concerns actuators of the piston type which act by transforming a linear movement into a rotational one.
  • the actuator comprises a casing defining a cylindrical interior in which is provided and in which plies a piston, a shaft being passed through a central passage in the said piston, the said shaft having a multiple number of specially profiled splines on its outer circumference while the inner wall of said central passage in the piston has the same number of equally profiled axially intruding grooves, two or more helically curved ridges extending from the uppermost region of the said cylindrical internal space of the said casing to its lowermost region, an upper and a lower stub extending from the respective upper and lower circular surfaces of the said shaft and extending out of the casing through top and bottom walls thereof, the piston having two or more slots which are matingly entered by the said helically curved ridges, a packing being provided ensuring air tightness in the cylindrical interior space which packing has recesses of the same profile as that of the helical ridge permitting its movement past the ridge, inlet ports being provided at the upper and the lower region of the casing, leading
  • Fig. 1 is a schematical, sectional view of the new device, while Fig. 2 is an isometric, partially sectional view thereof.
  • Fig. 3 is a schematical, sectional view of the cylindrical space in the casing.
  • Fig. 4 is a horizontal plan view thereof.
  • Fig. 5 is a horizontal plan view of the piston.
  • Fig. 6 is an elevational view of the piston with its packing.
  • Fig. 7 is a section on line A-A of Fig. 6.
  • the reference sign 1 indicates a casing the interior of which defines a cylindrical space 1a. In that space plies a piston 2. The up-and-down movement is caused by the introduction of pressurized fluid as will be described.
  • the piston 2 has a central aperture 2a through which passes a shaft 3.
  • the shaft 3 has at its outer circumferential surface axially extruding splines 3b. At the interior wall of aperture 2a are provided slots (not referenced) into which the spline 3b enter in radial direction.
  • the shaft has at its upper and at its lower face stubs 8, which pass out of the casing through top and bottom walls 9 and 10 respectively of the casing. Tightness of passage of the stubs is assured by packing rings 8'.
  • Reference sign 7 relates to an "O" ring seal.
  • the piston 2 has a cut out 13 in which at passage of the piston, the profile of the ridge is matingly received.
  • a packing 4,seated within a groove 14, ensures tightness between cavities 1a and 1b.
  • This packing is of peculiar shape, having periodical passages over the ridges of the cylinder.
  • the passage over the ridges is accomplished according to the "shortest distance" and thus it passes perpendicularly relative to every one of the ridges. Passing thus perpendicularly to the ridges, and the ridges being inclined at a certain angle to the axis of the cylinder, the seal cord forms two basic periodic shapes: the one that circumvents the ridge and the second which follows the inner circumference of the cylinder.
  • the recessed portions, those which circumvent the ridges, are interconnected top to bottom by the intermediate circumferential portions thus forming an uninterrupted seal.
  • the general shape of the seal is an 'O' ring upon which recesses have been made and those recesses have been twisted so that the cord of each one has an inclination perpendicular to the angle of the helix.
  • An inlet 15 for pressurized fluid and one 16 for pressurized fluid are provided at top and bottom walls 9, 10 respectively. These inlets lead into the space above and that below the piston 2.
  • the new device functions as an actuator in the following way: Assuming that in the position of Fig. 2 pressure fluid is introduced at inlet 15, the piston 2 would be caused to move in a downward direction; however, the movement of the piston is a twofold one:
  • the upward movement of the piston can be brought about by introducing pressurized fluid to entry 16 which acts upon the lowermost circular surface of the piston, forcing it upwardly and imparting torque, but in reverse direction, which means that the rotational movement caused to a mechanical part by the down movement of the piston is now reversed.
  • the magnitude of torque available at the stubs is dependent on the pitch of the helical ridge. This latter is of smaller linear length when its curvatures are shallow and is of greater magnitude with more pronounced curves.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
EP91119727A 1991-01-31 1991-11-19 Vérin Withdrawn EP0496966A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IL97108 1991-01-31
IL97108A IL97108A0 (en) 1991-01-31 1991-01-31 Actuator

Publications (1)

Publication Number Publication Date
EP0496966A1 true EP0496966A1 (fr) 1992-08-05

Family

ID=11062065

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91119727A Withdrawn EP0496966A1 (fr) 1991-01-31 1991-11-19 Vérin

Country Status (2)

Country Link
EP (1) EP0496966A1 (fr)
IL (1) IL97108A0 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE39133E1 (en) * 1997-09-24 2006-06-13 Surgical Navigation Technologies, Inc. Percutaneous registration apparatus and method for use in computer-assisted surgical navigation
EP1887229A1 (fr) * 2006-08-03 2008-02-13 Kinshofer GmbH vérin rotatif et méthode pour la fabrication dudit vérin
CN106703891A (zh) * 2016-08-19 2017-05-24 唐翊翃 一种流体动力转化装置

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2765778A (en) * 1954-09-17 1956-10-09 Julian E Gerry Hydraulic actuated steering mechanism
FR1240298A (fr) * 1959-11-10 1960-09-02 Vérin hydraulique rotatif
US2974646A (en) * 1959-11-02 1961-03-14 Carter Controls Inc Rotary actuator
FR1387403A (fr) * 1964-01-20 1965-01-29 Batic S A Appareil pour la mise en action des organes de commande des changements de régime des machines automatisées
US3183792A (en) * 1963-01-10 1965-05-18 Alton K Allen Free piston oscillator
GB1030563A (en) * 1965-03-26 1966-05-25 Louis Thomas Bates Fluid pressure operated rotary actuator
DE2510017A1 (de) * 1975-03-07 1976-09-23 Rudolf Eckart Druckmittelbetaetigter schwenkmotor
FR2529266A1 (fr) * 1982-06-28 1983-12-30 Almatic Sa Verin rotatif
DE3639121A1 (de) * 1986-11-15 1988-05-19 Hausherr & Soehne Rudolf Vorrichtung zur umwandlung einer hubbewegung in eine drehbewegung

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2765778A (en) * 1954-09-17 1956-10-09 Julian E Gerry Hydraulic actuated steering mechanism
US2974646A (en) * 1959-11-02 1961-03-14 Carter Controls Inc Rotary actuator
FR1240298A (fr) * 1959-11-10 1960-09-02 Vérin hydraulique rotatif
US3183792A (en) * 1963-01-10 1965-05-18 Alton K Allen Free piston oscillator
FR1387403A (fr) * 1964-01-20 1965-01-29 Batic S A Appareil pour la mise en action des organes de commande des changements de régime des machines automatisées
GB1030563A (en) * 1965-03-26 1966-05-25 Louis Thomas Bates Fluid pressure operated rotary actuator
DE2510017A1 (de) * 1975-03-07 1976-09-23 Rudolf Eckart Druckmittelbetaetigter schwenkmotor
FR2529266A1 (fr) * 1982-06-28 1983-12-30 Almatic Sa Verin rotatif
DE3639121A1 (de) * 1986-11-15 1988-05-19 Hausherr & Soehne Rudolf Vorrichtung zur umwandlung einer hubbewegung in eine drehbewegung

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE39133E1 (en) * 1997-09-24 2006-06-13 Surgical Navigation Technologies, Inc. Percutaneous registration apparatus and method for use in computer-assisted surgical navigation
EP1887229A1 (fr) * 2006-08-03 2008-02-13 Kinshofer GmbH vérin rotatif et méthode pour la fabrication dudit vérin
CN106703891A (zh) * 2016-08-19 2017-05-24 唐翊翃 一种流体动力转化装置

Also Published As

Publication number Publication date
IL97108A0 (en) 1992-03-29

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