EP0994497B1 - Interrupteur avec support isolant - Google Patents

Interrupteur avec support isolant Download PDF

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Publication number
EP0994497B1
EP0994497B1 EP99112917A EP99112917A EP0994497B1 EP 0994497 B1 EP0994497 B1 EP 0994497B1 EP 99112917 A EP99112917 A EP 99112917A EP 99112917 A EP99112917 A EP 99112917A EP 0994497 B1 EP0994497 B1 EP 0994497B1
Authority
EP
European Patent Office
Prior art keywords
switch
temperature
spring element
contact
switching
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
EP99112917A
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German (de)
English (en)
Other versions
EP0994497A3 (fr
EP0994497A2 (fr
Inventor
Marcel Hofsäss
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Individual
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Individual
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Filing date
Publication date
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Publication of EP0994497A2 publication Critical patent/EP0994497A2/fr
Publication of EP0994497A3 publication Critical patent/EP0994497A3/fr
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Publication of EP0994497B1 publication Critical patent/EP0994497B1/fr
Anticipated expiration legal-status Critical
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • H01H1/504—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position by thermal means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/32—Thermally-sensitive members
    • H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
    • H01H37/54—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting
    • H01H37/5418—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting using cantilevered bimetallic snap elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/32—Thermally-sensitive members
    • H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
    • H01H37/54—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting
    • H01H2037/5445—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting with measures for avoiding slow break of contacts during the creep phase of the snap bimetal
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/32—Thermally-sensitive members
    • H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
    • H01H37/54—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting
    • H01H2037/5463—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting the bimetallic snap element forming part of switched circuit
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/32—Thermally-sensitive members
    • H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
    • H01H37/54—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting
    • H01H37/5427—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting encapsulated in sealed miniaturised housing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/14—Electrothermal mechanisms
    • H01H71/16—Electrothermal mechanisms with bimetal element

Definitions

  • the present invention relates to a switch with a Isolierstoffong, on which a first and a second external connection are arranged, as well as a temperature-dependent Rear derailleur that depending on its temperature between an electrically conductive the first and the second external connection Connection for one to be passed through the switch produces electrical current, and a switching device that its Geometric shape depending on the temperature between a closing and changed an open position and in its closed position leads the current, and includes an actuator that with the Switching element is electrically and mechanically connected in series.
  • Such a switch is known from US 4,636,766.
  • the known switch comprises a U-shaped bimetal element as a switching element with two legs of different lengths. On a movable contact part is attached to the long leg, that interacts with a switch-proof counter contact that again with one of the two external connections in electrical conductive connection.
  • the shorter leg of the U-shaped bimetal element is on the free end of an actuator designed as a lever arm attached that with its other end firmly to the housing is connected as well as with the other of the two external connections is in an electrically conductive connection.
  • the actuator is another bimetallic element that is so on the U-shaped bimetallic element is agreed that the two bimetallic elements deform in opposite directions with temperature changes and thus the contact pressure between the movable contact part and receive the mating contact fixed to the housing.
  • This switch is intended as a breaker for high currents, which leads to a strong warming of the bimetallic elements lead, which ultimately the movable contact part is lifted off the fixed counter contact. Influences of Ambient temperature are the opposite Deformation of the bimetallic elements is compensated.
  • the two bimetal elements are very different geometrically are designed, they also have different long-term stabilities on, so that from time to time a readjustment would be required. However, this is not in use more possible, so that overall long-term stability and thus the functional reliability leaves something to be desired.
  • Another disadvantage of this construction is that large height due to the U-shaped bimetal element.
  • this switch has the disadvantage that it closes again automatically after cooling, i.e. none Has current dependency, the reclosing and thus Switch on the electrical device protected by the switch prevented.
  • Another current-dependent known from EP 0 103 792 B1 Switch has a bimetal spring tongue as a switching element on, which is attached to the one external connection and to her free end carries a movable contact part that with a Counter-contact cooperates, which at the free end of an elongated Spring element is arranged, the other end on the other external connector is attached so that the current through the Series connection from spring element and bimetal spring tongue flows.
  • the elastic mounting of the counter contact ensures a low mechanical stress on the bimetal spring tongue because of the Mating contact yields to a limited extent when the bimetal spring tongue changed their geometric shape due to a change in temperature. This causes irreversible deformation of the bimetallic spring tongue avoided, leading to a shift in the switching temperature could lead.
  • a disadvantage of this switch is that the bimetal spring tongue like all bimetal elements in the transition from In the open position, a so-called creep phase passes through, in the course of a temperature increase or -
  • the bimetallic element is creepingly deformed without however from its e.g. convex low temperature position already to snap into its concave high temperature position.
  • This Creeping phase occurs every time the temperature changes of the bimetal element either from above or from below
  • the jump temperature approaches and leads to noticeable changes in the formation.
  • the creep behavior of a bimetal element furthermore also change.
  • sneaking can cause that the pressure of the contact against the counter contact decreases, which creates undefined switching states.
  • the closing movement can make contact during the creeping phase gradually approach the counter contact, thereby increasing the risk of a Arc can be caused.
  • the inventor of the present application has recognized that that it is possible with a generic switch, a provide flat lid electrode, on the inside flat series resistor is arranged between the first External connection and the first end of the actuator.
  • the height is hardly noticeably influenced by the series resistance, because e.g. be formed as a sheet resistor can hardly increase the thickness of the lid electrode contributes.
  • the actuator is a Includes spring element, the actuating force largely independent of temperature is, and the actuator is a temperature-dependent Has actuating force that is greater than in its creeping phase the force of the spring element.
  • the inventor of the present application has recognized that the e.g. known from DE 21 21 802 C mechanical and electrical parallel arrangement of temperature-neutral spring element and switching element in an electrical and mechanical series connection modified and used in the new switch can be a number of other advantages in the unite new switch.
  • the temperature-neutral spring element exercises on the bimetal element no longer exert pressure that hinders its deformation, it rather resembles the deformation of the bimetal element in the creeping phase through its own deformation in such a way that movable Contact part and fixed counter contact with each other in such a way stay safely in the system for a low contact resistance is taken care of.
  • the contact pressure remains below the Switching temperature largely independent of the temperature.
  • the creeping phase of the bimetallic element is therefore no longer as suppressed in the prior art, but balanced so to speak, the bimetal element can namely in the Deform creep phase almost unhindered, making the changes the geometry is balanced by the spring element that the switch remains securely closed.
  • the temperature-dependent actuating force of the bimetal element chosen so that they are larger in the creeping phase is the largely temperature-neutral actuating force of the Spring element, which is thus the "rigid" bimetal element only "leads".
  • a big advantage of the new switch is its simple Construction, next to a housing-fixed counter contact is only a bimetal element is required, the spring element is temperature-neutral and therefore inexpensive. Overall, bimetal element and spring element to each other with respect to the actuating force be coordinated, but no longer additionally regarding their temperature behavior, because the rear derailleur straightens yourself, so to speak. This makes it a standard spring element possible for all temperature ranges, making an essential one Rationalization effect is achieved. Through this construction a low overall height can also be realized, whereby at different switching temperatures no new individual Adjustment is required, just the bimetal element must have the same spring properties but different switching temperatures be interpreted.
  • Another advantage is that tolerances and fluctuations in the switching temperature by guiding through the temperature-neutral Spring element to be balanced.
  • the spring element and the switching element are essentially flat, sheet-like parts that are extend to the same side in a V-shape away from their connection point.
  • This measure has the advantage that compared to the generic switch, the overall height is significantly reduced, and also a slight longitudinal extension because of the "folded back" free end of the switching element reached becomes.
  • an insulation layer is arranged on which one Resistor track is arranged, one end with the first External connection and other end connected to a contact surface is in contact with a contact area on the spring element is.
  • the spring element on his first end is T-shaped, with this T-shaped end rests on the insulating material carrier and on this T-shaped End has a contact area that with the contact surface of the series resistance is in the system.
  • a bottom electrode is connected to which a movable Contact part cooperates, which is provided on the switching element and between the bottom electrode and the lid electrode at least one PTC component is clamped.
  • the advantage here is that the PTC module has a self-holding function is realized, the contacting of the PTC module done by a simple pinch, so at the mechanical assembly of the switch is automatically implemented becomes.
  • the second external connection is connected to a bottom electrode with which a movable Contact part cooperates, which is provided on the switching element and between the bottom electrode and the T-shaped end a PTC component is clamped in the spring element.
  • the T-shaped end of the spring element is now several Functions combined in one, it serves on the one hand for mechanical Holder of the switching mechanism in the insulating material carrier and on the other hand for the electrical connection of both the series resistor as well as the PTC component, which acts as a self-holding resistor acts.
  • this is only necessary in the area this T-shaped end of the spring element for such Surface finish to ensure that electrical contacting only through printing and circulation to others Surfaces are less demanding, what contributes to cost reduction.
  • the advantage here is that compared to a switch without PTC component in the transverse pocket the longitudinal extent and only the transverse dimensions for the two side pockets need to be increased slightly, the remaining dimensions can be preserved. These measures also contribute overall small dimensions for the new switch.
  • the construction variant with the two side pockets is especially preferred when considering a large Current load a larger current passage area of the now self-holding resistor formed by two PTC modules required is.
  • a new switch is shown generally at 10, the is shown in schematic longitudinal section.
  • the new switch 10 has a first external connection 11, which is integrally connected to a flat cover electrode 12 is. Furthermore, a second external connection 14 is provided, which is formed in one piece with a bottom electrode 15. The Cover electrode 12 and the bottom electrode 15 are on one Isolierstoffitati 16 held the cover electrode 12 and keeps the bottom electrode 15 spaced parallel to each other.
  • the insulating material carrier 16 is basically open on the side 1, an embodiment is shown in which the insulating material carrier 16 is a pot-shaped lower housing part 17 includes that around the bottom electrode 15 by injection molding or potting is designed such that the bottom electrode 15 is an integral part of the lower housing part 17.
  • the Lower housing part 17 is closed by the cover electrode 12 and one indicated by 18, heat-welded Edge of the insulating material carrier 16 held captive.
  • the switching mechanism 19 comprises a mechanical and electrical series connection from a spring element 21 and a switching element 22, which by a 23rd arranged connection are interconnected.
  • the switching element 22 is a bimetal element in the present case.
  • the spring element 21 has a largely temperature-independent Positioning force, which means in the context of the present invention, that the actuating force or spring force of the spring element 21 in the range of the permissible operating temperature of the Switch 10 does not change noticeably.
  • the positioning force of the bimetal element is strongly temperature dependent and also in the so-called creep phase is already so large that the spring element 21 do not hinder the deformation of the bimetallic element Pressure on that at constant temperature in this spring system thus can exert rigid bimetal element.
  • the spring element is 25 in with its first, T-shaped end System with the cover electrode 12 and leads with its second End 26 in connection 23 to the switching element 22.
  • the switching element 22 carries at its free end 27 a movable contact part 28, which interacts with a switch-fixed counter contact 29, which is formed on the bottom electrode 15.
  • the bottom electrode 15 is partly from an insulating bridge 31 attacked, which prevents the connection 23 at Opening the switching mechanism 19 moves so far down that it undesirably comes into contact with the bottom electrode 15.
  • the cover electrode 12 is on provided on the inside 32 with a series resistor which electrically between the first outer terminal 11 and the T-shaped End 25 of the spring element 21 is switched.
  • a PTC module 33 is clamped and arranged in a pocket 34 and acts as a self-holding resistor 35.
  • Switch 10 is the self-holding resistor 35 through that Switch mechanism 19 bridged, that is, de-energized. If now as a result a temperature increase, the movable contact part 28 of lifts the fixed counter contact 29, a residual current flows from the second external connection 14 via the bottom electrode 15 through the Self-holding resistor 35 in the T-shaped end 25 and from there via the series resistor in the cover electrode 12 and from there in the first external connection 11, so that between the two External connections 11, 14 a series connection of series resistance as well as self-holding resistance, which is characterized by a Residual current is heated so far that it opens the switching mechanism 19 Condition holds.
  • Fig. 2 the switch of Fig. 1 is off along the line II-II Fig. 1 shown in section. It can be seen that the T-shaped End 25 of the spring element 21 on a base 36 of the Isolierstoffisme 16 is below the cut Edge 18 is arranged. At 37 is the outline of the base 36 shown.
  • T-shaped end 25 Under the T-shaped end 25 is the self-holding resistance in the pocket 34 35 indicated, from below in plant with a at 38 indicated contact area of the T-shaped end 25 of the spring element 21.
  • the base 36 is provided with projections 39 through which the self-holding resistor 35 in the pocket 34 is held.
  • 3a to 3d show production steps for manufacturing the with a series resistor cover electrode 12.
  • the inside 32 is initially covered with an insulation layer 41 provided, on which then a resistance path according to FIG. 3b 42 is applied as series resistor 43.
  • the resistance track 42 overlaps the insulation layer 41 in FIG. 3 to the left so that a connection area 44 to the inside 32 the cover electrode 12 made of metal is produced. In this way, the first external connection 11 with the series resistor 43 connected.
  • this released area of the Resistor path 42 now becomes a silver layer according to FIG. 3d 46 applied, which forms a contact surface 47.
  • the rear derailleur 19 from FIG. 1 is schematically enlarged Scale shown in its closed position.
  • the Switching element 22 is so far below its step temperature, that his sneaking phase has not yet started.
  • the Switching member 22 presses against the force of the spring element 21 Connection 23 in Fig. 4 upwards, so that there is a indicated at 51 Distance to the cover electrode 12 and one indicated at 52 Distance to the counter contact 29 sets.
  • the distance 51 increases to the extent that the distance increases 52 decreased.
  • the movable contact part 28 in FIG. 5 transversely to the counter contact 29 has moved. This friction is desirable because hereby the contact surfaces between contact part 28 and Counter contact 29 cleaned so that the electrical contact resistance is very low.
  • spring element 21 and the Switching element 22 are flat, sheet-like parts that differ from theirs Junction 23, so to speak, V-shaped on the same side, namely to extend to the right.
  • This "folded back" Arrangement of spring element 21 and switching element 22 is a shortened Design achieved in the longitudinal direction, so that in addition to the flat a relatively short design is also possible.
  • the base 37 can be seen on which the T-shaped End 25 of the rear derailleur 19 comes to rest when this in the Interior 20 is inserted. Laterally next to the interior 20 are provided in the lower part 17 two pockets 55, 56, the extend down to the bottom electrode 15 and after are open at the top. These pockets are from the side inwards Compared to base 37, base 57 is set down surrounded by falling out of inserted PTC modules prevented into the interior 20.

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  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Thermally Actuated Switches (AREA)
  • Push-Button Switches (AREA)
  • Switches With Compound Operations (AREA)
  • Steering Controls (AREA)
  • Switch Cases, Indication, And Locking (AREA)

Claims (10)

  1. Interrupteur comportant un support en matière isolante (16) sur lequel sont disposées une première et une deuxième connexions extérieures (11, 14), ainsi qu'un mécanisme de coupure (19) dépendant de la température qui réalise, en fonction de sa température, une liaison électriquement conductrice entre la première et la deuxième connexions extérieures (11, 14), pour un courant électrique à faire passer à travers l'interrupteur (10), et comprend un organe de coupure (22) qui modifie sa forme géométrique en fonction de la température entre une position de fermeture et une position d'ouverture, et qui conduit le courant dans sa position de fermeture, ainsi qu'un organe de réglage (21) qui est couplé en série mécaniquement et électriquement avec l'organe de coupure (22),
    caractérisé en ce que la première connexion extérieure (11) est reliée à une électrode de couvercle (12) plate sur laquelle l'organe de réglage (21) est fixé par sa première extrémité (25), et sur la face intérieure (32) de laquelle est disposée une résistance série (43) plate qui est couplée électriquement entre la première connexion extérieure (11) et la première extrémité (25) de l'organe de réglage (21).
  2. Interrupteur selon la revendication 1, caractérisé en ce que l'organe de réglage comprend un élément à ressort (21) dont la force de réglage dépend largement de la température, et l'organe de coupure (22) présente une force de réglage dépendant de la température qui, dans sa phase de rampage, est supérieure à la force de réglage de l'élément à ressort (21).
  3. Interrupteur selon la revendication 2, caractérisé en ce que l'élément à ressort (21) et l'organe de coupure (22) sont des pièces sensiblement plates de type tôles qui s'étendent en V vers le même côté depuis leur point de liaison (23).
  4. Interrupteur selon l'une des revendications 1 à 3, caractérisé en ce que sur la face intérieure (32) de l'électrode de couvercle (12) est disposée une couche isolante (41 ) sur laquelle est disposée une piste résistante (42) qui est reliée à une extrémité à la première connexion extérieure (11) et à l'autre extrémité à une surface de contact (47) par laquelle une zone de contact (38) s'applique contre l'élément à ressort (21).
  5. Interrupteur selon l'une des revendications 1 à 4, caractérisé en ce que l'élément à ressort (21) présente une forme en T à sa première extrémité (25), par cette extrémité en T (25) il repose sur le support en matière isolante (16) et présente, à cette extrémité en T (25), une zone de contact (38) qui s'applique contre une surface de contact (47) de la résistance série (43).
  6. Interrupteur selon l'une des revendications 1 à 5, caractérisé en ce que la deuxième connexion extérieure (14) est reliée à une électrode de fond (15) avec laquelle coopère une pièce de contact (28) mobile qui est prévue sur l'organe de coupure (22), et au moins un composant CTP est serré entre l'électrode de fond (15) et l'électrode de couvercle (12).
  7. Interrupteur selon l'une des revendications 1 à 6, caractérisé en ce que la deuxième connexion extérieure (14) est reliée à une électrode de fond (15) avec laquelle coopère une pièce de contact (28) mobile qui est prévue sur l'organe de coupure (22), et un composant CTP (33) est serré entre l'électrode de fond (15) et une extrémité en T (25) de l'élément à ressort (21).
  8. Interrupteur selon la revendication 6 ou 7, caractérisé en ce que le composant CTP (33) est disposé dans une poche (34, 55, 56) dans le support en matière isolante (16).
  9. Interrupteur selon les revendications 6 et 8, caractérisé en ce que la poche (34) est disposée transversalement entre les connexions extérieures (11, 14).
  10. Interrupteur selon les revendications 6 et 8, caractérisé en ce que deux poches latérales (55, 56) sont prévues à côté du mécanisme de coupure (9).
EP99112917A 1998-10-13 1999-07-05 Interrupteur avec support isolant Expired - Lifetime EP0994497B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19847208A DE19847208C2 (de) 1998-10-13 1998-10-13 Schalter mit einem Isolierstoffträger
DE19847208 1998-10-13

Publications (3)

Publication Number Publication Date
EP0994497A2 EP0994497A2 (fr) 2000-04-19
EP0994497A3 EP0994497A3 (fr) 2001-03-21
EP0994497B1 true EP0994497B1 (fr) 2003-11-26

Family

ID=7884346

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99112917A Expired - Lifetime EP0994497B1 (fr) 1998-10-13 1999-07-05 Interrupteur avec support isolant

Country Status (6)

Country Link
US (1) US6249210B1 (fr)
EP (1) EP0994497B1 (fr)
AT (1) ATE255273T1 (fr)
DE (2) DE19847208C2 (fr)
ES (1) ES2210907T3 (fr)
PT (1) PT994497E (fr)

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JP3756700B2 (ja) * 1999-07-22 2006-03-15 ウチヤ・サーモスタット株式会社 サーマルプロテクタ
US6498559B1 (en) * 2000-05-24 2002-12-24 Christopher Cornell Creepless snap acting bimetallic switch having step adjacent its bimetallic element
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DE102008049507A1 (de) * 2008-09-29 2010-04-01 Ellenberger & Poensgen Gmbh Miniatur-Schutzschalter
DE102009030353B3 (de) * 2009-06-22 2010-12-02 Hofsaess, Marcel P. Kappe für einen temperaturabhängigen Schalter sowie Verfahren zur Fertigung eines temperaturabhängigen Schalters
DE102009039948A1 (de) * 2009-08-27 2011-03-03 Hofsaess, Marcel P. Temperaturabhängiger Schalter
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ITMI20132139A1 (it) * 2013-12-19 2015-06-20 Electrica S R L Dispositivo di protezione per apparecchi elettrici, in particolare per motori elettrici, compressori e trasformatori

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JPH0831300B2 (ja) * 1987-10-07 1996-03-27 生方 眞哉 三相用サーマルプロテクタ
JPH0834075B2 (ja) * 1988-03-29 1996-03-29 東部電気株式会社 サーマルスイッチ
JP2585148B2 (ja) * 1991-04-05 1997-02-26 ウチヤ・サーモスタット株式会社 フィルム状発熱体内蔵型サーモスタット
DE4206157A1 (de) * 1992-02-28 1993-09-16 Hofsass P Thermoschalter
JPH05282977A (ja) * 1992-03-30 1993-10-29 Texas Instr Japan Ltd 過電流保護装置
US5212465A (en) * 1992-08-12 1993-05-18 Ubukata Industries Co., Ltd. Three-phase thermal protector
DE19604939C2 (de) * 1996-02-10 1999-12-09 Marcel Hofsaes Schalter mit einem temperaturabhängigen Schaltwerk
US5808539A (en) * 1996-10-10 1998-09-15 Texas Instruments Incorporated Temperature responsive snap acting control assembly, device using such assembly and method for making
JPH1074438A (ja) * 1997-08-29 1998-03-17 Yamada Denki Seizo Kk 密封形コンプレッサのサーマルプロテクタ

Also Published As

Publication number Publication date
ES2210907T3 (es) 2004-07-01
EP0994497A3 (fr) 2001-03-21
US6249210B1 (en) 2001-06-19
DE19847208C2 (de) 2002-05-16
PT994497E (pt) 2004-04-30
DE19847208A1 (de) 2000-05-04
DE59907849D1 (de) 2004-01-08
EP0994497A2 (fr) 2000-04-19
ATE255273T1 (de) 2003-12-15

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