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EP0231757A2 - Manual electric switch - Google Patents

Manual electric switch Download PDF

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Publication number
EP0231757A2
EP0231757A2 EP87100156A EP87100156A EP0231757A2 EP 0231757 A2 EP0231757 A2 EP 0231757A2 EP 87100156 A EP87100156 A EP 87100156A EP 87100156 A EP87100156 A EP 87100156A EP 0231757 A2 EP0231757 A2 EP 0231757A2
Authority
EP
European Patent Office
Prior art keywords
film
circuit board
switching device
housing
contacts
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Withdrawn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
EP87100156A
Other languages
German (de)
French (fr)
Other versions
EP0231757A3 (en
Inventor
Karl-Heinz Bauer
Gerold Eckert
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.)
Preh GmbH
Original Assignee
Preh 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 Preh GmbH filed Critical Preh GmbH
Publication of EP0231757A2 publication Critical patent/EP0231757A2/en
Publication of EP0231757A3 publication Critical patent/EP0231757A3/en
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/02—Details
    • H01H13/04—Cases; Covers
    • H01H13/06—Dustproof, splashproof, drip-proof, waterproof or flameproof casings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/02—Bases, casings, or covers
    • H01H9/04—Dustproof, splashproof, drip-proof, waterproof, or flameproof casings
    • H01H2009/048—Dustproof, splashproof, drip-proof, waterproof, or flameproof casings using a sealing boot, e.g. the casing having separate elastic body surrounding the operating member and hermetically closing the opening for it

Definitions

  • the invention relates to an electrical hand-held switching device with a circuit board mounted in a housing, on which switching contacts are provided, which are opposed by pushbuttons arranged on the housing and which are connected to a connecting cable via conductor tracks of the circuit board.
  • Such manual switching devices are used, for example, in motor vehicles to control various functions.
  • Such manual switchgear is adversely exposed to moisture, moisture, dust, sulfur and other atmospheric influences.
  • moisture or dust can pull to the switching contacts and the conductor tracks. This can lead to significant malfunctions.
  • the object of the invention is to propose a manual switching device of the type mentioned, the circuit board of which is protected against environmental influences.
  • the above object is achieved in a hand-held switching device of the type mentioned in the introduction in that there is a continuous movement in the switch housing between the switching contacts and the push-button switching elements Is arranged over the circuit board extending film that the film consists of a resilient material and seals the switching contacts with the conductor tracks against the interior of the housing.
  • the film ensures that when moisture, moisture or dust moves into the interior of the housing, the switching contacts and the conductor tracks remain free from such environmental influences. This significantly improves operational safety.
  • the film does not interfere with the switching behavior of the switch contacts, since it consists of a flexible material.
  • the film rests on the circuit board as a flat part.
  • the film is tubular or bag-shaped.
  • the circuit board with the switch contacts is inserted into it.
  • the film is tightly closed at both ends, with the connecting cable protruding from one end.
  • a housing of an electrical manual switching device 19 consists of an upper housing part 1, into which a lower housing part 2 is snapped. Buttons 3, 4 and 5 are mounted in the upper housing part 1. Between the lower housing part 2 and the upper housing part 1, a circuit board 7 is held in the housing interior 6, on the upper side 8 of which conductor tracks, not shown, are arranged. Under the buttons 3, 4 and 5 7 switch contacts 9 are provided on the top 8 of the board. A connecting cable 11 is connected to the conductor tracks at pads 10.
  • a film 12 is placed on the top 8 of the circuit board 7 and over the switch contacts 9 and the pads 10.
  • the film 12 consists of a shaped, soft, conformable plastic or rubber. Elevations 12 for the switch contacts 9 are formed on the film 12. In addition, an elevation 14 is provided for the pads 10. The film 12 engages around the board 7 with an edge 12 Plat.
  • the circuit board 7 with the switch contacts 9 and with active and passive electrical components e.g. Fixed resistor 18, inserted into a bag-shaped film 15.
  • the film 15 is made from a tubular film and is sealed at the end 16.
  • the opposite end 17 is placed close to the connecting cable 11.
  • the circuit board 7 protected in this way is inserted between the upper housing part 1 and the lower housing part 2, as can be seen in FIG.
  • the film 12 is omitted in this case.
  • Neither the film 12 nor the film 15 impair the switching behavior of the switch contacts 9.
  • the film 15 is still significantly thinner than the film 12, e.g. less than 50 ⁇ .
  • Such films, which are free of additives with an adverse influence on electrical contact surfaces, are used, for example, for food packaging.
  • Such a film is created, for example, from high-molecular low-pressure polyethylene in a film thickness of 10 to 20 ⁇ .
  • the end 17 of the film 15 is extended to a plug element and sealed there.
  • sealing can take place, for example, by means of an elastic grommet, by means of a shrink tube or also by means of a pressure screw connection.

Landscapes

  • Push-Button Switches (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Slide Switches (AREA)

Abstract

Bei einem elektrischen Handschaltgerät 19 soll dessen Platine 7 gegen Umwelteinflüsse geschützt sein. Es ist hierfür im Schaltergehäuse 1, 2 zwischen Schaltkontakten 9 und Tastern 3, 4, 5 eine sich durchgehend über die Platine 7 erstreckende Folie, 12, 15 vorgesehen. Die Folie 12, 15 kann ein Flächenteil oder ein tütenartiges Formteil sein.In the case of an electrical hand-held switching device 19, its circuit board 7 should be protected against environmental influences. For this purpose, a film 12, 15 extending continuously over the circuit board 7 is provided in the switch housing 1, 2 between the switching contacts 9 and the buttons 3, 4, 5. The film 12, 15 can be a flat part or a bag-like molded part.

Description

Die Erfindung betrifft ein elektrisches Handschaltgerät mit einer in einem Gehäuse gelagerten Platine, auf der Schaltkontakte vorgesehen sind, welchen am Gehäuse angeordnete Tastelemente gegenüberstehen und welche über Leiterbahnen der Platine mit einem Anschlußkabel verbunden sind.The invention relates to an electrical hand-held switching device with a circuit board mounted in a housing, on which switching contacts are provided, which are opposed by pushbuttons arranged on the housing and which are connected to a connecting cable via conductor tracks of the circuit board.

Derartige Handschaltgeräte werden beispielsweise in Kraftfahrzeugen zur Steuerung verschiedener Funktionen eingesetzt. Solche Handschaltgeräte sind Feuchtigkeits-, Nässe-, Staub-, Schwefel- und sonstigen atmos­phärischen Einflüssen nachteilig ausgesetzt. Bei bekannten Handschalt­geräten kann Feuchtigkeit oder Staub zu den Schaltkontakten und den Leiterbahnen ziehen. Dies kann zu erheblichen Funktionsstörungen führen.Such manual switching devices are used, for example, in motor vehicles to control various functions. Such manual switchgear is adversely exposed to moisture, moisture, dust, sulfur and other atmospheric influences. In known manual switching devices, moisture or dust can pull to the switching contacts and the conductor tracks. This can lead to significant malfunctions.

Aufgabe der Erfindung ist es, ein Handschaltgerät der eingangs genannten Art vorzuschlagen, dessen Platine gegen Umwelteinflüsse geschützt ist.The object of the invention is to propose a manual switching device of the type mentioned, the circuit board of which is protected against environmental influences.

Erfindungsgemäß ist obige Aufgabe bei einem Handschaltgerät der eingangs genannten Art dadurch gelöst, daß im Schaltergehäuse zwischen den Schaltkontakten und den Tastschaltelementen eine sich durchgehend über die Platine erstreckende Folie angeordnet ist, daß die Folie aus einem nachgiebigen Material besteht und die Schaltkontakte mit den Leiterbahnen gegenüber dem Gehäuseinnenraum abdichtet.According to the invention, the above object is achieved in a hand-held switching device of the type mentioned in the introduction in that there is a continuous movement in the switch housing between the switching contacts and the push-button switching elements Is arranged over the circuit board extending film that the film consists of a resilient material and seals the switching contacts with the conductor tracks against the interior of the housing.

Durch die Folie ist erreicht, daß dann, wenn Feuchtigkeit, Nässe oder Staub in den Gehäuseinnenraum zieht, die Schaltkontakte und die Leiterbahnen von solchen Umwelteinflüssen freibleiben. Dadurch ist die Betriebssicherheit wesentlich verbessert. Die Folie stört das Schaltverhalten der Schaltkontakte nicht, da sie aus einem nachgiebigen Material besteht.The film ensures that when moisture, moisture or dust moves into the interior of the housing, the switching contacts and the conductor tracks remain free from such environmental influences. This significantly improves operational safety. The film does not interfere with the switching behavior of the switch contacts, since it consists of a flexible material.

In Ausgestaltung der Erfindung liegt die Folie als Flächenteil auf der Platine auf.In an embodiment of the invention, the film rests on the circuit board as a flat part.

In einer anderen Ausgestaltung der Erfindung ist die Folie schlauch- oder tütenförmig geformt. In sie ist die Platine mit den Schaltkontakten eingesteckt. Die Folie ist an ihren beiden Enden dicht geschlossen, wobei aus dem einen Ende das Anschlußkabel ragt.In another embodiment of the invention, the film is tubular or bag-shaped. The circuit board with the switch contacts is inserted into it. The film is tightly closed at both ends, with the connecting cable protruding from one end.

Weitere vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen und der folgenden Beschreibung von Ausführungs­beispielen. In der Zeichnung zeigen:

  • Figur 1 Gesamtansicht eines Handschaltgerätes,
  • Figur 2 ein Handschaltgerät im Schnitt,
  • Figur 3 eine Seitenansicht einer als Flächenteil ausgebildeten Folie nach Figur 2,
  • Figur 4 eine Aufsicht der Folie nach Figur 3 und
  • figur 5 eine Platine in einer schlauchförmigen Folie.
Further advantageous embodiments of the invention result from the subclaims and the following description of exemplary embodiments. The drawing shows:
  • FIG. 1 overall view of a manual switching device,
  • FIG. 2 shows a manual switching device in section,
  • FIG. 3 shows a side view of a film according to FIG.
  • Figure 4 is a plan view of the film of Figure 3 and
  • Figure 5 is a circuit board in a tubular film.

Ein Gehäuse eines elektrischen Handschaltgerätes 19 besteht aus einem Gehäuseoberteil 1, in das ein Gehäuseunterteil 2 eingeschnappt ist. In dem Gehäuseoberteil 1 sind Taster 3, 4 und 5 gelagert. Zwischen dem dem Gehäuseunterteil 2 und dem Gehäuseoberteil 1 ist im Gehäuseinnen­raum 6 eine Platine 7 gehalten, auf deren Oberseite 8 nicht näher dar­gestellte Leiterbahnen angeordnet sind. Unter den Tastern 3, 4 und 5 sind auf der Oberseite 8 der Platine 7 Schaltkontakte 9 vorgesehen. An die Leiterbahnen ist an Lötaugen 10 ein Anschlußkabel 11 angeschlossen.A housing of an electrical manual switching device 19 consists of an upper housing part 1, into which a lower housing part 2 is snapped. Buttons 3, 4 and 5 are mounted in the upper housing part 1. Between the lower housing part 2 and the upper housing part 1, a circuit board 7 is held in the housing interior 6, on the upper side 8 of which conductor tracks, not shown, are arranged. Under the buttons 3, 4 and 5 7 switch contacts 9 are provided on the top 8 of the board. A connecting cable 11 is connected to the conductor tracks at pads 10.

Auf die Oberseite 8 der Platine 7 und über die Schaltkontakte 9 und die Lötaugen 10 ist eine Folie 12 gelegt.A film 12 is placed on the top 8 of the circuit board 7 and over the switch contacts 9 and the pads 10.

Die Folie 12 besteht aus einem geformten, weichen, anschmiegsamen Kunst­stoff oder Gummi. An der Folie 12 sind Erhebungen 12 für die Schaltkon­takte 9 ausgebildet. Außerdem ist eine Erhebung 14 für die Lötaugen 10 vorgesehen. Mit einem Rand 12ʹ umgreift die Folie 12 die Platine 7.The film 12 consists of a shaped, soft, conformable plastic or rubber. Elevations 12 for the switch contacts 9 are formed on the film 12. In addition, an elevation 14 is provided for the pads 10. The film 12 engages around the board 7 with an edge 12 Plat.

Tritt nun Feuchtigkeit oder Staub durch die Fugen zwischen dem Gehäuseoberteil 1 und den Tastern 3, 4 und 5 oder dem Gehäuseunterteil 2 in den Gehäuseinnenraum 6, dann kann diese Feuchtigkeit nicht auf die Oberseite 8 der Platine 7 und zu den Schaltkontakten 9 gelangen. Denn die Folie 12 deckt die Oberseite 8 durchgehend ab. Da die Platine 7 keine offenen Durchbrechungen aufweist, kann Feuchtigkeit auch nicht von unten her zu den Schaltkontakten 9 gelangen.If moisture or dust now passes through the joints between the upper housing part 1 and the buttons 3, 4 and 5 or the lower housing part 2 into the housing interior 6, then this moisture cannot reach the top 8 of the circuit board 7 and the switch contacts 9. Because the film 12 covers the top 8 continuously. Since the circuit board 7 has no open openings, moisture cannot reach the switch contacts 9 from below.

Beim Ausführungsbeispiel nach Figur 5 ist die Platine 7 mit den Schaltkontakten 9 und mit aktiven wie auch passiven elektrischen Komponenten, z.B. Festwiderstand 18, in eine tütenartig geformte Folie 15 eingesteckt. Die Folie 15 ist aus einer Schlauchfolie gefertigt und am Ende 16 dicht verschlossen. Das gegenüberliegende Ende 17 ist dicht an das Anschlußkabel 11 angelegt. Die so geschützte Platine 7 wird zwischen das Gehäuseoberteil 1 und das Gehäuseunterteil 2 eingesetzt, wie dies in Figur 2 zu sehen ist. Die Folie 12 entfällt in diesem Falle. Weder die Folie 12 noch die Folie 15 beeinträchtigen das Schaltverhalten der Schaltkontakte 9. Die Folie 15 ist noch wesentlich dünner als die Folie 12, z.B. kleiner 50 µ. Solche Folien, die frei sind von Zusätzen mit nachteiligem Einfluß auf elektrische Kontaktflächen, werden beispielsweise für die Lebensmittelverpackung verwendet. Eine solche Folie ist beispielsweise erstellt aus hochmole­kularem Niederdruck-Polyäthylen in einer Foliendicke von 10 bis 20 µ.In the embodiment according to Figure 5, the circuit board 7 with the switch contacts 9 and with active and passive electrical components, e.g. Fixed resistor 18, inserted into a bag-shaped film 15. The film 15 is made from a tubular film and is sealed at the end 16. The opposite end 17 is placed close to the connecting cable 11. The circuit board 7 protected in this way is inserted between the upper housing part 1 and the lower housing part 2, as can be seen in FIG. The film 12 is omitted in this case. Neither the film 12 nor the film 15 impair the switching behavior of the switch contacts 9. The film 15 is still significantly thinner than the film 12, e.g. less than 50 µ. Such films, which are free of additives with an adverse influence on electrical contact surfaces, are used, for example, for food packaging. Such a film is created, for example, from high-molecular low-pressure polyethylene in a film thickness of 10 to 20 μ.

In einem weiteren, nicht dargestellten Ausführungsbeispiel ist das Ende 17 der Folie 15 bis zu einem Steckerelement verlängert und dort abge­dichtet. Das Abdichten kann in diesem Fall beispielsweise mittels einer elastischen Tülle, mittels eines Schrumpfschlauches oder auch durch eine Anpressverschraubung erfolgen.In a further embodiment, not shown, the end 17 of the film 15 is extended to a plug element and sealed there. In this case, sealing can take place, for example, by means of an elastic grommet, by means of a shrink tube or also by means of a pressure screw connection.

Bezugszeichenliste 01/86Reference number list 01/86

  • 1 Gehäuseoberteil1 upper housing part
  • 2 Gehäuseunterteil2 lower housing part
  • 3 Taster3 buttons
  • 4 Taster4 buttons
  • 5 Taster5 buttons
  • 6 Gehäuseinnenraum6 housing interior
  • 7 Platine7 board
  • 8 Oberseite8 top
  • 9 Schaltkontakte9 switching contacts
  • 10 Lötaugen10 pads
  • 11 Anschlußkabel11 connection cables
  • 12 Folie12 slide
  • 12ʹ Rand12ʹ edge
  • 13 Erhebungen13 surveys
  • 14 Erhebung14 survey
  • 15 Folie15 slide
  • 16 Folien-Ende16 slide end
  • 17 Folien-Ende17 slide end
  • 18 Festwiderstand18 fixed resistance
  • 19 Elektrisches Handschaltgerät19 Electric hand control device

Claims (8)

1. Elektrisches Handschaltgerät mit einer in einem Gehäuse gelagerten Platine, auf der Schaltkontakte vorgesehen sind, welchen am Gehäuse angeordnete Tastelemente gegenüberstehen und welche über Leiterbahnen der Platine mit einem Anschlußkabel verbunden sind,
dadurch gekennzeichnet,
daß im Gehäuse (1, 2) zwischen den Schaltkontakten (9) und den Tastschaltelementen (3, 4, 5) eine sich durchgehend über die Platine (7) erstreckende Folie (12, 15) angeordnet ist, daß die Folie (12, 15) aus einem nachgiebigen Material besteht und die Schaltkontakte (9) mit den Leiterbahnen gegenüber dem Gehäuseinnenraum (6) abdichtet.1. Electrical hand-held switching device with a circuit board mounted in a housing, on which switching contacts are provided, which are opposed by push-button elements arranged on the housing and which are connected to a connecting cable via conductor tracks of the circuit board,
characterized,
that in the housing (1, 2) between the switch contacts (9) and the key switch elements (3, 4, 5) a film (12, 15) extending continuously over the circuit board (7) is arranged, that the film (12, 15 ) consists of a resilient material and seals the switch contacts (9) with the conductor tracks against the housing interior (6). 2. Handschaltgerät nach Anspruch 1,
dadurch gekennzeichnet,
daß die Folie (12) als Flächenteil auf der Platine (7) aufliegt.2. Manual switching device according to claim 1,
characterized,
that the film (12) rests as a flat part on the board (7). 3. Handschaltgerät nach Anspruch 2,
dadurch gekennzeichnet,
daß an der Folie (12) Erhebungen (13) für die Schaltkontakte (9) ausgeformt sind.3. Manual switching device according to claim 2,
characterized,
that elevations (13) for the switch contacts (9) are formed on the film (12). 4. Handschaltgerät nach Anspruch 2 oder 3,
dadurch gekennzeichnet,
daß an der Folie (12) eine Erhebung (14) für Anschlußlötaugen (10) des Anschlußkabels (11) ausgeformt sind.4. Manual switching device according to claim 2 or 3,
characterized,
that an elevation (14) for solder pads (10) of the connecting cable (11) are formed on the film (12). 5. Handschaltgerät nach einem der vorhergehenden Ansprüche 2 bis 4,
dadurch gekennzeichnet,
daß an der Folie (12) ein Rand (12ʹ) ausgebildet ist, der den Rand der Platine (7) übergreift.5. Manual switching device according to one of the preceding claims 2 to 4,
characterized,
that an edge (12ʹ) is formed on the film (12) which engages over the edge of the circuit board (7). 6. Handschaltgerät nach Anspruch 1,
dadurch gekennzeichnet,
daß die Folie (15) schlauch- oder tütenförmig geformt ist und in die Folie (15) die Platine (7) mit den Schaltkontakten (9) eingesteckt ist.6. Hand switch device according to claim 1,
characterized,
that the film (15) is tubular or bag-shaped and the circuit board (7) with the switch contacts (9) is inserted into the film (15). 7. Handschaltgerät nach Anspruch 6,
dadurch gekennzeichnet,
daß die Folie (15) an den beiden Enden (16, 17) dicht geschlossen ist, wobei aus dem einen Ende das Anschlußkabel (11) ragt.7. Hand switch device according to claim 6,
characterized,
that the film (15) is tightly closed at the two ends (16, 17), the connecting cable (11) protruding from one end. 8. Handschaltgerät nach Anspruch 7,
dadurch gekennzeichnet,
daß die Folie (15) mit dem Ende (17) in eine Steckverbindung geführt ist.8. Hand switch device according to claim 7,
characterized,
that the film (15) with the end (17) is guided in a plug connection.
EP87100156A 1986-02-05 1987-01-08 Manual electric switch Withdrawn EP0231757A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8602882U 1986-02-05
DE8602882U DE8602882U1 (en) 1986-02-05 1986-02-05 Electric hand control device

Publications (2)

Publication Number Publication Date
EP0231757A2 true EP0231757A2 (en) 1987-08-12
EP0231757A3 EP0231757A3 (en) 1989-08-30

Family

ID=6791269

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87100156A Withdrawn EP0231757A3 (en) 1986-02-05 1987-01-08 Manual electric switch

Country Status (3)

Country Link
US (1) US4803323A (en)
EP (1) EP0231757A3 (en)
DE (1) DE8602882U1 (en)

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DE4307909A1 (en) * 1993-03-12 1994-09-15 Marquardt Gmbh Housing part with push button switch
DE19605201B4 (en) * 1996-02-13 2007-04-12 Marquardt Gmbh Housing for an electronic key
DE19817369A1 (en) 1997-05-07 1998-11-12 Marquardt Gmbh Switch for washing machine, etc.
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DE10247676A1 (en) * 2002-10-12 2004-07-15 Hella Kg Hueck & Co. Electronic circuit boards used in such as road vehicle equipment is protected by all over cover of plastic foil
US7244257B2 (en) * 2002-11-05 2007-07-17 Sherwood Services Ag Electrosurgical pencil having a single button variable control
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US7241294B2 (en) * 2003-11-19 2007-07-10 Sherwood Services Ag Pistol grip electrosurgical pencil with manual aspirator/irrigator and methods of using the same
US7503917B2 (en) 2003-11-20 2009-03-17 Covidien Ag Electrosurgical pencil with improved controls
US7879033B2 (en) 2003-11-20 2011-02-01 Covidien Ag Electrosurgical pencil with advanced ES controls
US7156842B2 (en) 2003-11-20 2007-01-02 Sherwood Services Ag Electrosurgical pencil with improved controls
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US7500974B2 (en) 2005-06-28 2009-03-10 Covidien Ag Electrode with rotatably deployable sheath
US7828794B2 (en) * 2005-08-25 2010-11-09 Covidien Ag Handheld electrosurgical apparatus for controlling operating room equipment
US20070049914A1 (en) * 2005-09-01 2007-03-01 Sherwood Services Ag Return electrode pad with conductive element grid and method
US20070260240A1 (en) * 2006-05-05 2007-11-08 Sherwood Services Ag Soft tissue RF transection and resection device
US8506565B2 (en) * 2007-08-23 2013-08-13 Covidien Lp Electrosurgical device with LED adapter
US8235987B2 (en) 2007-12-05 2012-08-07 Tyco Healthcare Group Lp Thermal penetration and arc length controllable electrosurgical pencil
US8632536B2 (en) * 2008-03-31 2014-01-21 Covidien Lp Electrosurgical pencil including improved controls
US8636733B2 (en) * 2008-03-31 2014-01-28 Covidien Lp Electrosurgical pencil including improved controls
US8597292B2 (en) * 2008-03-31 2013-12-03 Covidien Lp Electrosurgical pencil including improved controls
US8162937B2 (en) * 2008-06-27 2012-04-24 Tyco Healthcare Group Lp High volume fluid seal for electrosurgical handpiece
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Also Published As

Publication number Publication date
EP0231757A3 (en) 1989-08-30
US4803323A (en) 1989-02-07
DE8602882U1 (en) 1986-04-03

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