EP0284948B1 - Pressure switch - Google Patents

Pressure switch Download PDF

Info

Publication number
EP0284948B1
EP0284948B1 EP88104525A EP88104525A EP0284948B1 EP 0284948 B1 EP0284948 B1 EP 0284948B1 EP 88104525 A EP88104525 A EP 88104525A EP 88104525 A EP88104525 A EP 88104525A EP 0284948 B1 EP0284948 B1 EP 0284948B1
Authority
EP
European Patent Office
Prior art keywords
microswitch
plunger
switch
pressure switch
pressure
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
EP88104525A
Other languages
German (de)
French (fr)
Other versions
EP0284948A2 (en
EP0284948A3 (en
Inventor
Hubert Franz Strzodka
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.)
Imo Industries GmbH
Original Assignee
Imo Industries GmbH
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 Imo Industries GmbH filed Critical Imo Industries GmbH
Priority to AT88104525T priority Critical patent/ATE84909T1/en
Publication of EP0284948A2 publication Critical patent/EP0284948A2/en
Publication of EP0284948A3 publication Critical patent/EP0284948A3/en
Application granted granted Critical
Publication of EP0284948B1 publication Critical patent/EP0284948B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H35/00—Switches operated by change of a physical condition
    • H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
    • H01H35/26—Details
    • H01H35/2607—Means for adjustment of "ON" or "OFF" operating pressure
    • H01H35/2628—Means for adjustment of "ON" or "OFF" operating pressure by varying the relative position of switch-casing and pressure sensitive element
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H35/00—Switches operated by change of a physical condition
    • H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
    • H01H35/26—Details
    • H01H35/2607—Means for adjustment of "ON" or "OFF" operating pressure
    • H01H35/2635—Means for adjustment of "ON" or "OFF" operating pressure by adjustment of a motion transmitting system

Definitions

  • the invention relates to a pressure switch with a, depending on the pressure in a pressure chamber acted upon by the pressure medium, displaceable plunger, which bears against a switch of a microswitch actuating lever of the microswitch and in which the microswitch with the lever is used to set the switch-on point of the microswitch is displaceable at right angles to the plunger in the longitudinal direction of the lever and abuts against a wall surface of the housing of the pressure switch, the microswitch being held against this wall surface by means of at least one fastening screw leading through an elongated hole in the wall surface.
  • a pressure switch of the above type is the subject of FR-A-1 250 613.
  • the switch-on point can be adjusted by moving a microswitch in two elongated holes with the fastening screws loosened, with the lever attached to it, transversely to the plunger.
  • the transmission ratio between the path of the plunger and the switching pin changes at the same time, so that the area between the switch-on point and the switch-back point increases or decreases depending on the direction of displacement of the microswitch.
  • the invention has for its object to design a pressure switch of the type mentioned in such a way that the area between switch-on point and switch-back point as a whole and the mutual distance between switch-on point and switch-back point can be adjusted particularly sensitively.
  • the lever is designed as a rocker arm that the fastening screw leads into a slider which is slidably arranged in a bore running in the direction of displacement of the microswitch behind the wall surface with the fastening screw loosened together with the microswitch, and that the slider engages with part of its lateral surface in a bore extending transversely to the direction of displacement for inserting an adjusting tool.
  • the means for adjusting the slider can be designed very differently.
  • the slide could be designed as a toothed rack and a pinion engaging in this toothed rack could be provided to move the slide.
  • the sliding piece can be moved particularly easily if, according to one embodiment of the invention, it consists of a material that is soft in comparison to the adjusting tool and the adjusting tool is on Is a screwdriver, the tip of which has multiple bevel gear-like teeth. A toothing on the slider can then be dispensed with entirely.
  • the pressure switch according to the invention has a housing 1 with a threaded connector 2 for screwing into a threaded bore (not shown) of the component to which it is to be attached.
  • a coaxial bore 3 is provided in the threaded connector 2, through which the pressure medium to be measured can get into a pressure chamber 4 up to the end face of a stamp 5.
  • This stamp 5 is sealed by means of a seal 6 to the housing 1, so that pressurization of the pressure chamber 4 leads to a displacement of the stamp 5 as seen in the drawing to the right.
  • the plunger 5 lies against a plunger 7 which bears with its opposite side against a lever 9 which can be pivoted about an axis 8 and is oriented transversely to the plunger 7.
  • An actuating spring 10 biases the plunger in the direction of the plunger 5, for which purpose it is supported against a screw piece 11 which is used to change the clamping force of the Adjusting spring 10 can be screwed more or less far into the housing 1.
  • the lever 9 is fastened with its axis 8 to the housing of a microswitch 12.
  • This micro switch 12 has a switching pin 13 which bears on the side facing the microswitch 12 against the lever 9 and is aligned with the plunger 7 in the position shown.
  • the microswitch 12 is slidably mounted on the housing 1 at right angles to the plunger 7. For this purpose, it is held against a wall surface 16 of the housing 1 by means of two fastening screws 14, 15 in a manner still to be explained. If these fastening screws 14, 15 are loosened and the microswitch 12 is pushed down as seen in the drawing, then the plunger 7 presses closer to the axis 8 against the lever 9 than in the middle position shown. A slight axial displacement of the plunger 7 thus leads to a relatively strong pivoting movement of the lever 9 and thus to a correspondingly large displacement of the switching pin 13, so that switching occurs earlier.
  • Figure 2 illustrates the design of the pressure switch. It can be seen how the microswitch 12 lies against the wall surface 16 with the fastening screws 14, 15. Furthermore, an end-side bore 17 can be seen, in which part of the outer surface of a cylindrical slide 18 can be seen.
  • FIG 3 shows that this slider 18 is slidably disposed in a bore 19 and the mounting screws 14, 15 are screwed through the microswitch 12 into this slide 18.
  • An elongated hole (not shown) in the wall surface 16 enables the microswitch 12 to be moved together with the slider 18, provided the fastening screws 14, 15 are not tightened.
  • This adjusting tool 20 is inserted into the bore 17 so that its multiple toothing 22 sits on the outer surface of the slider 18. Since the slider 18 is to be made of a softer material than the multiple toothing 22, this presses into the outer surface of the slider 18, so that it can be moved by turning the adjusting tool 20 as if it had a rack-like toothing. In practice, one moves the slider 18 and thus the microswitch 12 so far and in such a direction that the differential path of the pressure switch is of the required size.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Press Drives And Press Lines (AREA)
  • Braking Systems And Boosters (AREA)

Abstract

A pressure switch has a plunger, axially displaceable by the pressure being measured, which enables a contact pin of a microswitch to be actuated. Between the plunger and the contact pin there is arranged a rocker. The microswitch is fastened to the housing of the pressure switch so as to be displaceable in the main extension direction of the rocker. This provides a way to vary the step-up ratio between the plunger motion and the contact-pin motion, whereby the magnitude of the hysteresis of the pressure switch can be varied.

Description

Die Erfindung betrifft einen Druckschalter mit einem, in Abhängigkeit vom Druck in einem vom zu messenden Druckmedium beaufschlagten Druckraum, verschiebbaren Stößel, welcher gegen einen einen Schaltstift eines Mikroschalters betätigenden Hebel des Mikroschalters anliegt und bei dem zum Einstellen des Einschaltpunktes des Mikroschalters der Mikroschalter mit dem Hebel rechtwinklig zum Stößel in Längserstreckungsrichtung des Hebels verschiebbar ist und gegen eine Wandfläche des Gehäuses des Druckschalters anliegt, wobei der Mikroschalter mittels zumindest einer durch ein Langloch in der Wandfläche führenden Befestigungsschraube gegen diese Wandfläche gehalten ist.The invention relates to a pressure switch with a, depending on the pressure in a pressure chamber acted upon by the pressure medium, displaceable plunger, which bears against a switch of a microswitch actuating lever of the microswitch and in which the microswitch with the lever is used to set the switch-on point of the microswitch is displaceable at right angles to the plunger in the longitudinal direction of the lever and abuts against a wall surface of the housing of the pressure switch, the microswitch being held against this wall surface by means of at least one fastening screw leading through an elongated hole in the wall surface.

Ein Druckschalter der vorstehenden Art ist Gegenstand der FR-A-1 250 613. Bei diesem Druckschalter läßt sich der Einschaltpunkt dadurch verstellen, daß man einen Mikroschalter bei gelockerten Befestigungsschrauben in zwei Langlöchern mit dem an ihm befestigten Hebel quer zu dem Stößel verschiebt. Mit der Verstellung des Einschaltpunktes verändert sich zugleich das Übersetzungsverhältnis zwischen dem Weg des Stößels und dem Schaltstift, so daß sich der Bereich zwischen dem Einschaltpunkt und Rückschaltpunkt je nach Verschieberichtung des Mikroschalters vergrößert oder verkleinert.A pressure switch of the above type is the subject of FR-A-1 250 613. With this pressure switch, the switch-on point can be adjusted by moving a microswitch in two elongated holes with the fastening screws loosened, with the lever attached to it, transversely to the plunger. With the adjustment of the switch-on point, the transmission ratio between the path of the plunger and the switching pin changes at the same time, so that the area between the switch-on point and the switch-back point increases or decreases depending on the direction of displacement of the microswitch.

Der Erfindung liegt die Aufgabe zugrunde, einen Druckschalter der eingangs genannten Art derart zu gestalten, daß mit ihm der Bereich zwischen Einschaltpunkt und Rückschaltpunkt als Ganzes und der gegenseitige Abstand zwischen Einschaltpunkt und Rückschaltpunkt besonders feinfühlig verstellt werden können.The invention has for its object to design a pressure switch of the type mentioned in such a way that the area between switch-on point and switch-back point as a whole and the mutual distance between switch-on point and switch-back point can be adjusted particularly sensitively.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß der Hebel als Kipphebel ausgebildet ist, daß die Befestigungsschraube in ein Gleitstück führt, welches in einer in Verschieberichtung des Mikroschalters verlaufenden Bohrung hinter der Wandfläche bei gelockerter Befestigungsschraube zusammen mit dem Mikroschalter verschiebbar angeordnet ist, und daß das Gleitstück mit einem Teil seiner Mantelfläche in eine quer zur Verschieberichtung verlaufenden Bohrung zum Einsetzen eines Verstellwerkzeugs greift.This object is achieved in that the lever is designed as a rocker arm that the fastening screw leads into a slider which is slidably arranged in a bore running in the direction of displacement of the microswitch behind the wall surface with the fastening screw loosened together with the microswitch, and that the slider engages with part of its lateral surface in a bore extending transversely to the direction of displacement for inserting an adjusting tool.

Durch diese Art der Befestigung des Mikroschalters läßt sich dieser sehr feinfühlig verschieben.This type of attachment of the microswitch allows it to be moved very sensitively.

Die Mittel zur Verstellung des Gleitstückes können sehr unterschiedlich gestaltet sein. Man könnte zum Beispiel das Gleitstück als Zahnstange ausbilden und zum Verschieben des Gleitstückes ein in diese Zahnstange greifendes Ritzel vorsehen. Besonders einfach läßt sich das Gleitstück verschieben, wenn es gemäß einer Ausgestaltung der Erfindung aus einem im Vergleich zum Verstellwerkzeug weichen Werkstoff besteht und das Verstellwerkzeug ein Schrauber ist, dessen Spitze eine kegelradähnliche Mehrfachverzahnung aufweist. Auf eine Verzahnung am Gleitstück kann dann gänzlich verzichtet werden.The means for adjusting the slider can be designed very differently. For example, the slide could be designed as a toothed rack and a pinion engaging in this toothed rack could be provided to move the slide. The sliding piece can be moved particularly easily if, according to one embodiment of the invention, it consists of a material that is soft in comparison to the adjusting tool and the adjusting tool is on Is a screwdriver, the tip of which has multiple bevel gear-like teeth. A toothing on the slider can then be dispensed with entirely.

Die Erfindung läßt zahlreiche Ausführungsformen zu. Eine davon ist in der Zeichnung dargestellt und wird nachfolgend beschrieben. In ihr zeigen die

Fig.1
einen Längsschnitt durch einen erfindungsgemäßen Druckschalter,
Fig.2
eine Vorderansicht des Druckschalters,
Fig.3
eine gegenüber den vorangegangenen Figuren vergrößerte Schnittdarstellung durch den Druckschalter im Bereich der Befestigung seines Mikroschalters.
The invention allows numerous embodiments. One of them is shown in the drawing and is described below. They show in her
Fig. 1
2 shows a longitudinal section through a pressure switch according to the invention,
Fig. 2
a front view of the pressure switch,
Fig. 3
an enlarged sectional view compared to the previous figures through the pressure switch in the area of the attachment of its microswitch.

Wie die Figur 1 erkennen läßt, hat der erfindungsgemäße Druckschalter ein Gehäuse 1 mit einem Gewindestutzen 2 zum Einschrauben in eine nicht dargestellte Gewindebohrung des Bauteils, an dem er angebracht werden soll. Im Gewindestutzen 2 ist eine koaxiale Bohrung 3 vorgesehen, durch die das zu messende Druckmedium in einen Druckraum 4 bis vor die Stirnfläche eines Stempels 5 gelangen kann. Dieser Stempel 5 ist mittels einer Dichtung 6 zum Gehäuse 1 hin abgedichtet, so daß eine Druckbeaufschlagung des Druckraumes 4 zu einer Verschiebung des Stempels 5 in der Zeichnung gesehen nach rechts führt. Der Stempel 5 legt sich dabei gegen einen Stößel 7, der mit seiner gegenüberliegenden Seite gegen einen um eine Achse 8 schwenkbaren, quer zum Stößel 7 ausgerichteten Hebel 9 anliegt.As can be seen in FIG. 1, the pressure switch according to the invention has a housing 1 with a threaded connector 2 for screwing into a threaded bore (not shown) of the component to which it is to be attached. A coaxial bore 3 is provided in the threaded connector 2, through which the pressure medium to be measured can get into a pressure chamber 4 up to the end face of a stamp 5. This stamp 5 is sealed by means of a seal 6 to the housing 1, so that pressurization of the pressure chamber 4 leads to a displacement of the stamp 5 as seen in the drawing to the right. The plunger 5 lies against a plunger 7 which bears with its opposite side against a lever 9 which can be pivoted about an axis 8 and is oriented transversely to the plunger 7.

Eine Stellfeder 10 spannt den Stößel in Richtung des Stempels 5 vor, wozu sie gegen ein Schraubstück 11 abgestützt ist, welches zur Veränderung der Spannkraft der Stellfeder 10 mehr oder weniger weit in das Gehäuse 1 eingeschraubt werden kann.An actuating spring 10 biases the plunger in the direction of the plunger 5, for which purpose it is supported against a screw piece 11 which is used to change the clamping force of the Adjusting spring 10 can be screwed more or less far into the housing 1.

Der Hebel 9 ist mit seiner Achse 8 am Gehäuse eines Mikroschalters 12 befestigt. Dieser Mirkoschalter 12 hat einen Schaltstift 13, welcher auf der dem Mikroschalter 12 zugewandten Seite gegen den Hebel 9 anliegt und in der dargestellten Stellung mit dem Stößel 7 fluchtet. Für die Erfindung wesentlich ist, daß der Mikroschalter 12 rechtwinklig zum Stößel 7 verschiebbar auf dem Gehäuse 1 befestigt ist. Zu diesem Zeck ist er mittels zweier Befestigungsschrauben 14, 15 auf noch zu erläuternde Weise gegen eine Wandfläche 16 des Gehäuses 1 gehalten. Lockert man diese Befestigungsschrauben 14, 15 und schiebt den Mikroschalter 12 in der Zeichnung gesehen nach unten, dann drückt der Stößel 7 näher zur Achse 8 gegen den Hebel 9 als in der dargestellten Mittelstellung. Eine geringe axiale Verschiebung des Stößels 7 führt dadurch zu einer relativ starken Schwenkbewegung des Hebels 9 und damit zu einer entsprechend großen Verschiebung des Schaltstiftes 13, so daß es früher zu einem Schalten kommt.The lever 9 is fastened with its axis 8 to the housing of a microswitch 12. This micro switch 12 has a switching pin 13 which bears on the side facing the microswitch 12 against the lever 9 and is aligned with the plunger 7 in the position shown. It is essential for the invention that the microswitch 12 is slidably mounted on the housing 1 at right angles to the plunger 7. For this purpose, it is held against a wall surface 16 of the housing 1 by means of two fastening screws 14, 15 in a manner still to be explained. If these fastening screws 14, 15 are loosened and the microswitch 12 is pushed down as seen in the drawing, then the plunger 7 presses closer to the axis 8 against the lever 9 than in the middle position shown. A slight axial displacement of the plunger 7 thus leads to a relatively strong pivoting movement of the lever 9 and thus to a correspondingly large displacement of the switching pin 13, so that switching occurs earlier.

Verschiebt man den Mikroschalter 12 in der Zeichnung gesehen nach oben, so tritt eine Weguntersetzung ein. Der Stößel 7 muß sich relativ weit axial verschieben, um eine geringe Verschiebung des Schaltstiftes 13 zu bewirken.Moving the microswitch 12 as seen in the drawing upwards, a step-down step occurs. The plunger 7 must move axially relatively far in order to bring about a slight displacement of the switching pin 13.

Die Figur 2 verdeutlicht die Gestaltung des Druckschalters. Zu erkennen ist, wie der Mikroschalter 12 mit den Befestigungsschrauben 14, 15 gegen die Wandfläche 16 anliegt. Weiterhin ist eine stirnseitige Bohrung 17 zu sehen, in der man einen Teil der Mantelfläche eines zylindrischen Gleitstückes 18 erkennt.Figure 2 illustrates the design of the pressure switch. It can be seen how the microswitch 12 lies against the wall surface 16 with the fastening screws 14, 15. Furthermore, an end-side bore 17 can be seen, in which part of the outer surface of a cylindrical slide 18 can be seen.

Die Figur 3 zeigt, daß dieses Gleitstück 18 in einer Bohrung 19 verschieblich angeordnet ist und die Befestigungsschrauben 14, 15 durch den Mikroschalter 12 hindurch in dieses Gleitstück 18 geschraubt sind. Ein nicht dargestelltes Langloch in der Wandfläche 16 ermöglicht eine Verschiebung des Mikroschalters 12 zusammen mit dem Gleitstück 18, sofern die Befestigungsschrauben 14, 15 nicht festgezogen sind.Figure 3 shows that this slider 18 is slidably disposed in a bore 19 and the mounting screws 14, 15 are screwed through the microswitch 12 into this slide 18. An elongated hole (not shown) in the wall surface 16 enables the microswitch 12 to be moved together with the slider 18, provided the fastening screws 14, 15 are not tightened.

Zur feinfühligen Verschiebung des Gleitstückes 18 dient ein als Schrauber ausgebildetes Verstellwerkzeug 20, das an seinem unteren Ende einen Kegel 21 mit einer Mehrfachverzahnung 22 aufweist. Dieses Verstellwerkzeug 20 steckt man in die Bohrung 17, so daß sich seine Mehrfachverzahnung 22 auf die Mantelfläche des Gleitstückes 18 setzt. Da das Gleitstück 18 aus einem weicheren Werkstoff bestehen soll als die Mehrfachverzahnung 22, drückt sich diese in die Mantelfläche des Gleitstückes 18 ein, so daß dieses durch Drehen des Verstellwerkzeugs 20 so verschoben werden kann, als ob es eine zahnstangenartige Verzahnung hätte. Man verschiebt in der Praxis das Gleitstück 18 und damit den Mikroschalter 12 so weit und in eine solche Richtung, bis daß der Differenzweg des Druckschalters die erforderliche Größe aufweist.An adjustment tool 20 designed as a screwdriver, which has a cone 21 with multiple toothing 22 at its lower end, is used for the sensitive displacement of the slider 18. This adjusting tool 20 is inserted into the bore 17 so that its multiple toothing 22 sits on the outer surface of the slider 18. Since the slider 18 is to be made of a softer material than the multiple toothing 22, this presses into the outer surface of the slider 18, so that it can be moved by turning the adjusting tool 20 as if it had a rack-like toothing. In practice, one moves the slider 18 and thus the microswitch 12 so far and in such a direction that the differential path of the pressure switch is of the required size.

Claims (2)

  1. Pressure switch with a plunger (7) which is movable as a function of the pressure in a pressure chamber (4) loaded by the pressure medium to be measured and which rests against an arm (9) of the microswitch (12) actuating a switch pin (13) of a microswitch (12) and in which the microswitch with the arm (9) is movable at right angles to the plunger (7) in the longitudinal direction of the arm (9) to adjust the switch-on point of the microswitch (12) and rests against a wall face (16) of the housing (1) of the pressure switch, the microswitch (12) being held against the wall face (16) by at least one fastening screw (14, 15) leading through a slot in the wall face (16), characterised in that the arm (9) is designed as a rocker arm, in that the fastening screw (14, 15) leads into a sliding member (18) which is movably arranged in a bore (19) extending in the direction of movement of the microswitch (12) behind the wall face (16) when the fastening screw (14, 15) is loosened together with the microswitch (12), and in that the sliding member (18) engages with a part of its surface in a bore (17) extending transversely to the direction of movement for insertion of an adjusting tool (20).
  2. Pressure switch according to claim 1, charaterised in that the sliding member (18) consists of a material which is flexible in comparison with the adjusting tool (20) and the adjusting tool (20) is a screw of which the tip has multiple teeth (22) similar to a bevel gear.
EP88104525A 1987-03-31 1988-03-22 Pressure switch Expired - Lifetime EP0284948B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88104525T ATE84909T1 (en) 1987-03-31 1988-03-22 PRESSURE SWITCH.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873710645 DE3710645A1 (en) 1987-03-31 1987-03-31 PRESSURE SWITCH
DE3710645 1987-03-31

Publications (3)

Publication Number Publication Date
EP0284948A2 EP0284948A2 (en) 1988-10-05
EP0284948A3 EP0284948A3 (en) 1989-07-26
EP0284948B1 true EP0284948B1 (en) 1993-01-20

Family

ID=6324437

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88104525A Expired - Lifetime EP0284948B1 (en) 1987-03-31 1988-03-22 Pressure switch

Country Status (4)

Country Link
US (1) US4827093A (en)
EP (1) EP0284948B1 (en)
AT (1) ATE84909T1 (en)
DE (2) DE3710645A1 (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3819459A1 (en) * 1988-06-08 1989-12-14 Festo Kg Pressure-controlled electrical switching unit
FR2638888A1 (en) * 1988-11-09 1990-05-11 Crouzet Sa IMPROVED ELECTRICAL SWITCHING DEVICE
DE3910837A1 (en) * 1989-04-04 1990-10-11 Imo Ind Gmbh ELECTRICAL SWITCHING DEVICE
JP2857173B2 (en) * 1989-08-11 1999-02-10 自動車機器株式会社 Temperature dependent pressure detection switch and hydraulic control system using the pressure detection switch
US5136128A (en) * 1991-01-11 1992-08-04 Teledyne Industries, Inc. Hydraulically-piloted switch
JP3916684B2 (en) * 1995-12-27 2007-05-16 カヤバ工業株式会社 Hydraulic pump pressure switch
US6722736B2 (en) * 2002-02-21 2004-04-20 Hickory Springs Manufacturing Company Movable switch for a motorized recliner
EP1362722A1 (en) * 2002-05-14 2003-11-19 Ford Global Technologies, Inc., A subsidiary of Ford Motor Company Connection system for an automotive air condition device
JP3722287B2 (en) * 2002-06-11 2005-11-30 アサ電子工業株式会社 Limit switch
ITRE20030092A1 (en) * 2003-09-30 2005-04-01 Arrow Line Srl DAMPENED PRESSURE SWITCH.
US7605336B2 (en) * 2007-08-30 2009-10-20 Honeywell International Inc. Pressure switch with adjustable differental setting
RU2551565C2 (en) 2010-01-29 2015-05-27 Геа Хоул Инк. Rotary milking station, kit for its mounting and methods of its mounting and operation
CN106783262B (en) * 2015-11-24 2018-07-06 西安航空动力控制科技有限公司 A kind of microswitch controlling device
EP4123678B1 (en) 2021-07-22 2024-05-15 Eaton Intelligent Power Limited Pressure switch with a piston

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE216131C (en) *
US2268340A (en) * 1940-10-18 1941-12-30 Evarts G Loomis Fluid pressure control device
FR882291A (en) * 1941-05-31 1943-05-28 Stotz Kontakt Gmbh Automobile stop light switch
FR1250613A (en) * 1959-12-02 1961-01-13 Olaer Patent Co Improvements to devices for controlling electrical equipment by the pressure of a fluid
DE1448292B1 (en) * 1961-10-26 1970-08-27 Otto Dold Control device
US3449535A (en) * 1966-08-01 1969-06-10 Essex Mfg Co Inc Fluid operated switch
DE1640360B1 (en) * 1966-12-14 1972-01-20 Herion Werke Kg Electrical differential pressure switch
DE2201973C3 (en) * 1972-01-17 1978-05-24 Teves Gmbh Alfred Lost motion gear for an electrical switch
US3937912A (en) * 1974-09-30 1976-02-10 Martin Industries, Inc. Pressure responsive circuit control unit having adjustable, interchangeable actuator components and cam-operated switch
DE7913018U1 (en) * 1979-05-05 1979-09-20 Robert Scheuffele & Co Armaturen U. Apparate, 7120 Bissingen Pressure switch in explosion-proof design
DE3202512C2 (en) * 1982-01-27 1985-02-28 Willi 7120 Bietigheim-Bissingen Quitoschinger Pressure controlled electrical switch
DE3311083A1 (en) * 1983-03-26 1984-09-27 Alfred Teves Gmbh, 6000 Frankfurt Device for switching a circuit as a function of a hydraulic pressure
DD216131A1 (en) * 1983-06-14 1984-11-28 Pirna Fahrzeugelektrik CONTACT WHISPER ASSEMBLY IN HYDRAULICALLY SWITCHED SWITCHES

Also Published As

Publication number Publication date
ATE84909T1 (en) 1993-02-15
DE3710645A1 (en) 1988-10-20
EP0284948A2 (en) 1988-10-05
US4827093A (en) 1989-05-02
EP0284948A3 (en) 1989-07-26
DE3877603D1 (en) 1993-03-04

Similar Documents

Publication Publication Date Title
EP0284948B1 (en) Pressure switch
DE69002047T2 (en) Pipe coupling.
DE2338304A1 (en) TORQUE WRENCH
DE602004002426T2 (en) Shelf support device with detachable jaw for locking the shelf
DE2815888C2 (en) Pressure dependent switch
DE102021100041A1 (en) Torque wrench that can be used to maintain the accuracy of the torque value
DE1655102B2 (en) Device for setting control devices in motor vehicles
DE4092384C2 (en) Three-position actuator
DE4240218C2 (en) Switching device
DE8704718U1 (en) Pressure switch
EP1253994B1 (en) Clamping device
DE3141363C1 (en) Spring-pressure terminal for electrical leads
CH679094A5 (en)
DE2325303C3 (en) Switching device operated by a pressurized membrane
DE2852370C2 (en) Device for regulating the brake pressure of a vehicle
EP3747183A1 (en) Universal bracket for a telecommunication terminal
DE3145629C2 (en)
EP2257956B1 (en) Switch, in particular limit switch
DE2024892C3 (en) Electric switch
DE2506012C2 (en) Sphygmomanometer
EP0735614A2 (en) Electrical connector with a clamping screw
DE19902910C2 (en) Device for switching an electrical connection, in particular swivel lever switch
CH683638A5 (en) Linear encoder.
DE19543424C2 (en) Position switching device
DE19741926C1 (en) counter

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

17P Request for examination filed

Effective date: 19890830

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: IMO INDUSTRIES GMBH

17Q First examination report despatched

Effective date: 19911017

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 19930120

Ref country code: SE

Effective date: 19930120

Ref country code: NL

Effective date: 19930120

Ref country code: ES

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19930120

Ref country code: BE

Effective date: 19930120

Ref country code: GB

Effective date: 19930120

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19930120

Ref country code: FR

Effective date: 19930120

REF Corresponds to:

Ref document number: 84909

Country of ref document: AT

Date of ref document: 19930215

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3877603

Country of ref document: DE

Date of ref document: 19930304

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19930322

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19930331

Ref country code: LI

Effective date: 19930331

Ref country code: CH

Effective date: 19930331

EN Fr: translation not filed
NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]

Effective date: 19930120

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19970524

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19981201