EP0310718B1 - Steckerbuchse mit Stecker - Google Patents

Steckerbuchse mit Stecker Download PDF

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Publication number
EP0310718B1
EP0310718B1 EP19870308845 EP87308845A EP0310718B1 EP 0310718 B1 EP0310718 B1 EP 0310718B1 EP 19870308845 EP19870308845 EP 19870308845 EP 87308845 A EP87308845 A EP 87308845A EP 0310718 B1 EP0310718 B1 EP 0310718B1
Authority
EP
European Patent Office
Prior art keywords
socket
plug
housing
wiping
generally cylindrical
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
EP19870308845
Other languages
English (en)
French (fr)
Other versions
EP0310718A1 (de
Inventor
Roby R. Bailey
Martin P. Gierke
Alfred Schiazza Iii
Richard T. Walter
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.)
Black and Decker Inc
Original Assignee
Black and Decker Inc
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 Black and Decker Inc filed Critical Black and Decker Inc
Priority to DE19873789383 priority Critical patent/DE3789383T2/de
Priority to EP19870308845 priority patent/EP0310718B1/de
Publication of EP0310718A1 publication Critical patent/EP0310718A1/de
Application granted granted Critical
Publication of EP0310718B1 publication Critical patent/EP0310718B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
    • H01R24/38—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/64—Means for preventing incorrect coupling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R2103/00—Two poles

Definitions

  • This invention relates to a socket and a plug therefor.
  • a portable lead-acid battery pack as offering increased power capacity and longer operation times between charging.
  • the battery pack is designed to be carried by the user separate from the device and is capable of supplying low voltage power to both low current and high current devices.
  • cigar lighter sockets generally comprise a circular cylindrical metal wall forming the negative electrode and an end wall which forms the positive electrode and is insulated from the circular cylindrical metal wall.
  • the plugs generally comprise a tubular body having a spring loaded electrode projecting axially forward and a spring wire extending radially. In use the spring loaded electrode and the spring wire merely abut the positive and negative electrodes. The current carrying ability of these plugs is strictly limited, particularly if the electrodes become corroded.
  • a typical prior art plug is shown in DE-U-77 33 921
  • An aim of the present invention is to provide a socket which can accommodate a conventional cigar lighter socket-compatible plug and a plug which can handle a higher current.
  • a socket for accommodating a low voltage cigar lighter socket-compatible plug and a plug having a higher current handling ability which socket comprises: a generally cylindrical socket housing; a first wiping contact at or adjacent one end of said generally cylindrical socket housing on or adjacent the longitudinal axis thereof; a second wiping contact at or adjacent the cylindrical wall of said socket housing; a first abutment surface at or adjacent said one end of said generally cylindrical socket housing on or adjacent the longitudinal axis thereof; and a second abutment surface on or adjacent the cylindrical wall of said socket housing, wherein said first and second wiping contacts are intended to co-operate with respective first and second wiping contacts on said plug having said higher current handling ability and said first and second abutment surfaces are intended to bear respective first and second spring biased abutment contacts on said low voltage cigar lighter socket-compatible plug.
  • wiping contact it is meant that the contact has a significant contiguous contact surface area which comes into sliding contact with an opposing contact also having a significant contiguous contacting surface during the course of establishing the electrical connection between the two contacts.
  • the "wiping" engagement acts to rejuvenate the metal contact surface by removing, at least in part, any oxide or other non-conductive layer that may have built up on the contact surface.
  • the completed contact is characterized by electrical conduction across the mating contacting areas thereby affording high current capacity and reducing ohmic heating due to contact imperfections and contamination.
  • said first wiping contact comprises the side of a pin and said first abutment surface comprises an end of said pin.
  • said second wiping contact comprises at least one ear which extends substantially radially of said generally cylindrical socket housing.
  • said second wiping contact comprises at least one pair of ears which are adjacent one another and which extend substantially radially of said generally cylindrical socket housing.
  • said second abutment surface comprises a barrel-shaped portion.
  • said at least one ear is integral with said barrel-shaped portion.
  • resilient spring means are provided to retain a plug in said socket.
  • said socket is provided with one or more notches to, in use, guide the second wiping contacts of a plug into alignment with the second wiping contacts of said socket.
  • means are provided to inhibit said socket actuating a cigar lighter.
  • Such means may comprise, for example, a boss which inhibits the end of a cigar lighter coming into contact with said first abutment surface.
  • a flange may be provided at or adjacent the opening to said socket to inhibit insertion of a cigar lighter fully in the socket.
  • the present invention also provides a plug for use with a socket according to the invention, said plug comprising a generally cylindrical plug housing having a leading end, a first wiping contact at or adjacent said leading end on or adjacent the longitudinal axis of said generally cylindrical plug housing, and a second wiping contact extending generally radially outwardly from said generally cylindrical plug housing.
  • said second wiping contact extends generally radially outwardly from diametrically opposed portions of said generally cylindrical plug housing.
  • said second wiping contact comprises a U-shape member disposed with the base of the 'U' facing the leading end of said generally cylindrical plug housing and the outer surfaces of the sides of the 'U' forming the second wiping contact.
  • means are provided to inhibit said plug being actuated in a conventional cigar lighter socket.
  • Such means may comprise, for example, a layer of insulating material on the leading end of the first wiping contact.
  • the present invention also provides a coupling comprising a socket in accordance with the present invention and a plug in accordance with the present invention.
  • Connector assembly 20 comprises a plug 22, and a socket 24. Also shown in Figure 1, in chain lines, is a conventional cigar lighter socket-compatible plug 26 of the type used to connect low-voltage, low current appliances to a cigar lighter socket.
  • the plug 22 is capable of connecting low-voltage, high direct current appliances to a power source via socket 24.
  • the plug 22 comprises a plug housing 30 which is generally cylindrical.
  • the plug 22 has an axis 32 and a leading end 34 which can be inserted into the socket 24.
  • the plug 22 also has a trailing end 36 which is configured for gripping by a user and from which power cord 37 having plug leads 38, 40 extends for connection to a suitable appliance or power tool (not shown).
  • Plug housing 30 preferably is formed from a non-conductive mouldable, impact-resistant plastic and can be formed in two mating halves, for permitting "clamshell” type assembly or moulded as one piece around internal parts (“insert moulded").
  • the leading end 34 of the plug 22 comprises a cylindrical portion 46' and a frusto-conical portion 42 formed from a non-conductive material.
  • the leading end 34 can be formed integrally with plug housing 30.
  • the plug 22 comprises a first wiping contact in the form of a sleeve 44 positioned in the cylindrical portion 46' of the plug housing 30.
  • Sleeve 44 which is coaxially mounted with respect to axis 32, can be made of brass or similar conductive, resilient material and is crimped on plug lead 38.
  • the plug 22 is also provided with a second wiping contact in the form of a U-shape member 46.
  • the U-shape member 46 is electrically isolated from the sleeve 44, extends transverse to axis 32, and projects radially outward from the outer surface 50 of the plug housing 30 through apertures 48 a , b formed at diametrically opposed positions in housing 30 (see Figure 7).
  • a tab portion 47 of the U-shape member 46 is crimped to plug lead 40.
  • the U-shape member 46 is economically formed from a single piece of sheet metal, such as brass or other resilient material, and includes appropriate reliefs to permit captive assembly into plug housing 30 if a "clamshell" construction is utilized.
  • portions 52 and 54 of the U-shape member 46 project outside of plug housing 30 in a "wing"-like configuration and provides two pairs of planar wiping contacts for engagement by a suitable mating wiping contact in socket 24.
  • portion 52 includes a first pair of planar wiping contact surfaces 56 a , b while portion 54 provides a second pair of planar wiping contact surfaces 58 a , b .
  • the U-shape member 46 is disposed with the bottom of the U orientated in the direction of insertion to provide a "lead in” to the mating wiping contact element of socket 24.
  • the balance of the internal configuration of plug component 22 can include suitable structure for providing strain relief for plug leads 38, 40, as well as appropriate support structure to provide internal rigidity to plug housing 30.
  • Plug 22 includes a shoulder 60 on plug housing 30 to provide an engagement surface for resilient spring fingers 106, 108 provided with socket 24.
  • the fingers 106, 108 serve to restrain movement of plug 22 counter to the insertion direction whenever plug 22 has been inserted to a predetermined axial insertion depth (see figures 3 to 5).
  • plug housing 30 has a pair of flanges 62, 64 integrally formed with plug housing 30 at an axial location between the portions 52, 54 of U-shape member 46 and the gripping location 66 on plug housing 30.
  • Flanges 62, 64 are sized to shield portions 52, 54 to protect the user's hand during the insertion of the plug 22 in the socket 24.
  • the socket 24 comprises a socket housing 70 which is non-conductive, and generally cylindrical.
  • the socket housing 70 has an axis 72, an open end 74 configured for receiving plug 22 and a closed end 78.
  • Socket housing 70 is made from an impact-resistant, mouldable plastic material and can be made in two joinable halves in a "clamshell” like construction.
  • the socket 24 comprises a first wiping contact in the form of a pin 76 positioned adjacent the closed end 78 of the socket housing 74 on the axis 72.
  • Pin 76 is generally cylindrical and has a diameter such that outer surface 80 forms an interference fit with the cylindrical surface 45 of sleeve 44 when plug 22 is inserted into socket 24 as shown in Figure 5.
  • pin 76 is formed from a single piece of sheet metal to provide an integral base support 82 which can be captured within the "clamshell" construction of socket housing 70. Also, a tab portion 84 is formed on the same piece of sheet metal and extends radially outwardly to provide a lead to connect pin 76 electrically to one terminal of an external power source (not shown).
  • the socket 24 also comprises a second wiping contact electrically isolated from the pin 76 and positioned proximate the outer periphery of the socket housing 70 at a preselected circumferential position.
  • socket 24 includes a second contact element 85 comprising a barrel-shaped portion 86 positioned within the socket housing 70 proximate the open end 74.
  • Two pairs of ears 88 a , b and 90 a , b are integrally formed from, and extend substantially radially outward from, barrel-shaped portion 86 and are received in corresponding slots 92, 94 formed in socket housing 70.
  • the inwardly facing surfaces 96 a , b and 98 a , b of opposing ears 88 a , b and 90 a , b provide the complementary mating wiping contact surfaces for engagement with the first and second pairs of planar wiping contact surfaces 56 a , b and 58 a , b of U-shape member 46 carried by plug 22.
  • socket housing 70 includes cylindrical extension 100 at open end 74.
  • the cylindrical extension 100 includes a pair of "V"-shaped notches 102, 104 (see Figures 2 and 6) for guiding protruding portions 52, 54 into engagement with ears 88 a , b and 90 a , b of second contact element 85.
  • socket 24 includes a pair of resilient spring fingers 106, 108 resiliently mounted in socket housing 70.
  • Resilient spring fingers 106, 108 have radially inwardly depending portions 110, 112 which co-operate with shoulder 60 on plug 22 to retain plug 22 in socket 24 at the predetermined axial insertion position as shown in Figure 5.
  • Cylindrical extension 100 of socket 24 is enlarged to accommodate the radially outward flexing of resilient spring fingers 106, 108 during the insertion process.
  • resilient spring fingers 106, 108 are conveniently integrally formed from the same piece of sheet metal used to form barrel-shaped portion 86 and ears 88 a , b and 90 a , b .
  • a tab portion 114 is formed integrally with barrel-shaped portion 86 and used as a second electrical lead.
  • the socket 24 can also receive a conventional low current cigar lighter socket-compatible plug 26.
  • the cigar lighter socket-compatible plug 26 shown in chain lines in Figures 1 and 2 has a spring loaded contact pin 120, disposed on the axis 122 of the plug 26.
  • the plug 26 also has a bent wire spring contact 124, located at the periphery of the plug 26.
  • Pin 76 of socket 24 specifically includes a closed pin face 126 sized and positioned for providing abutting engagement with spring loaded contact pin 120 upon insertion of cigar lighter socket-compatible plug 26 into socket 24 ( Figure 4). Additionally, barrel-shaped portion 86 of second contact element 85 which is conductive and electrically connected to tab portion 114 extends axially toward the closed end 78 of socket 24 a distance sufficient to provide engagement with bent wire spring contact 124 when plug 26 is inserted. Further, to ensure compatibility with car appliances having plug connectors like plug 26, pin 76 preferably has a positive polarity and second contact element 85 a negative polarity.
  • the socket 24 is intended to be utilized in the power pack described in our co-pending European Patent Application 87 308 844.7 of even date. Because of the compatibility of the socket 24 with conventional cigar lighter socket-compatible plugs used with automotive appliances, there is the potential for inadvertent operation of the high current plug 22 in a standard cigar lighter socket in an automobile. Because the fusing system of an automobile often is set for low current cigar lighter operation (e.g., 6 amps), if a user attempts to operate a high current power tool or appliance from the car battery utilizing plug 22 there is a possibility of blowing the fuse or possibly causing damage to the automobile's electrical wiring system.
  • low current cigar lighter operation e.g. 6 amps
  • a conventional cigar lighter socket 130 (shown in chain lines) is mounted in a dashboard 132.
  • the cigar lighter socket 130 has an electrical contact face 134 contactable with end 152 of a cigar lighter 138.
  • cylindrical portion 46' has an inwardly extending insulating flange 144 which extends an axial distance "d2" sufficient to preclude contact between sleeve 44 and electrical contact face 134 following inadvertent insertion of plug 22 into cigar lighter socket 130.
  • socket 24 includes lockout means for preventing electrical connection to at least one of pin 76 and second contact element 85.
  • socket 24 is provided with boss 148 formed on the inside periphery of socket housing 70 circumjacent pin 76.
  • Boss 148 is made of a non-conductive material, preferably formed integrally with socket housing 70, and extends axially toward the open end 74 of the socket 24 a distance greater than the axial extent of pin 76, the difference in axial extent being designated by "d1" in Figure 8.
  • the inner diameter 150 of boss 148 is sized to be less than the outer diameter of the end 152 of cigar lighter 138 to preclude electrical contact between pin 76 and heating element 146.
  • the inwardly turned lip portion 156 of cylindrical extension 100 is sized to have a minimum inner diameter 158 less than the outer diameter of the flange 154. Moreover, the axial extent of cylindrical extension 100 is sized so that lip portion 156 is spaced from pin 76 by a distance greater than the distance between flange 154 and heating element 146, thus precluding electrical contact between pin 76 and heating element 146.

Landscapes

  • Coupling Device And Connection With Printed Circuit (AREA)

Claims (15)

  1. Steckerbuchse (24) zur Aufnahme eines mit einer Zigarrenanzünder-Steckerbuchse kompatiblen Niederspannungssteckers (26) und Stecker (22) mit der Fähigkeit, höheren Strom zu führen, welche Steckerbuchse (24) aufweist:
    ein im wesentlichen zylindrisches Steckerbuchsengehäuse (70);
    einen ersten Schleifkontakt (76) an oder nahe an einem Ende des im wesentlichen zylindrischen Steckerbuchsengehäuses (70) an oder nahe an dessen Längsachse (72);
    einen zweiten Schleifkontakt (88a, b; 90a, b) an oder nahe an der zylindrischen Wand des Steckerbuchsengehäuses (70);
    eine erste Anlagefläche (126) an oder nahe an dem einen Ende des im wesentlichen zylindrischen Steckerbuchsengehäuses (70) an oder nahe an dessen Längsachse (72); und
    einer zweiten Anlagefläche (86) an oder nahe an der zylindrischen Wand des Steckerbuchsengehäuses (70);
    wobei der erste bzw. zweite Schleifkontakt (76; 88a, b; 90a, b) mit einem ersten bzw. zweiten Schleifkontakt (44; 56a, b; 58a, b) an dem Stecker (22), welcher die Fähigkeit hat, höheren Strom zu führen, zusammenwirken sollen und wobei die erste bzw. zweite Anlagefläche (126, 86) einen ersten bzw. zweiten mit Federspannung vorbelasteten Berührungskontakt (120, 124) an dem mit einer Zigarrenanzünder-Steckerbuchse kompatiblen Niederspannungsstecker (26) tragen sollen.
  2. Steckerbuchse nach Anspruch 1, dadurch gekennzeichnet, daß der erste Schleifkontakt (76) die Seite (80) eines Stiftes (76) und die erste Anlagefläche (126) ein Ende des Stiftes (76) aufweist.
  3. Steckerbuchse nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der zweite Schleifkontakt wenigstens eine abstehende Kante (88a, b; 90a, b) aufweist, die im wesentlichen radial zu dem im wesentlichen zylindrischen Steckerbuchsengehäuse (70) verläuft.
  4. Steckerbuchse nach Anspruch 2, dadurch gekennzeichnet, daß der zweite Schleifkontakt mit wenigstens ein Paar von abstehenden Kanten (88a, b) aufweist, die benachbart zueinander liegen und im wesentlichen radial zu dem im wesentlichen zylindrischen Steckerbuchsengehäuse 870) verlaufen.
  5. Steckerbuchse nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die zweite Anlagefläche einen trommelförmigen Bereich (86) aufweist.
  6. Steckerbuchse nach Anspruch 5, wenn abhängig von Anspruch 3 oder 4, dadurch gekennzeichnet, daß die wenigstens eine abstehende Kante einstückig mit dem trommelförmigen Bereich (86) ist.
  7. Steckerbuchse nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß nachgiebige Federmittel (106, 108) vorgesehen sind, um einen Stecker (22, 26) in der Steckerbuchse (24) zu halten.
  8. Steckerbuchse nach einem der vorhergehenden Ansprüche, die mit einer oder mehreren Schlitzen (102, 104) versehen ist, um bei Benutzung, die zweiten Schleifkontakte (52, 54) eines Steckers (22) in Ausrichtung zu den zweiten Schleifkontakten (88a, b; 90a, b) der Steckerbuchse (24) zu führen.
  9. Steckerbuchse nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß sie Mittel (148) enthält, um zu verhindern, daß die Steckerbuchse (24) einen Zigarrenanzünder betätigt.
  10. Steckerbuchse nach Anspruch 9, dadurch gekennzeichnet, daß die Mittel einen Vorsprung (148) aufweisen, der, wenn ein Zigarrenanzünder (138) in die Steckerbuchse (24) eingesetzt wird, an dem Ende (152) des Zigarrenanzünders (138) anliegt und verhindert, daß er in Kontakt mit dem ersten Schleifkontakt (76) und der ersten Anlagefläche (126) kommt.
  11. Stecker (22) zur Verwendung mit einer Steckerbuchse gemäß einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Stecker (22) ein im wesentlichen zylindrisches Steckergehäuse (30) mit einem führenden Ende (34), einen ersten Schleifkontakt (44) an oder nahe an dem führenden Ende (34) an oder nahe an der Längsachse (32) des im wesentlichen zylindrischen Steckergehäuses (30) und einen zweiten Schleifkontakt (56a, b; 58a, b) aufweist, der im wesentlichen radial nach außen von dem im wesentlichen zylindrischen Steckergehäuse (30) verläuft.
  12. Stecker nach Anspruch 11, dadurch gekennzeichnet, daß der zweite Schleifkontakt im wesentlichen radial nach außen von diametral gegenüberliegenden Bereichen des im wesentlichen zylindrischen Steckergehäuses (30) verläuft.
  13. Stecker nach Anspruch 11 oder 12, dadurch gekennzeichnet, daß der zweite Schleifkontakt ein U-förmiges Teil (46) aufweist, und das mit dem Boden des "U" dem führenden Ende (34) des im wesentlichen zylindrischen Steckergehäuses (30) zugewandt angeordnet ist, wobei die äußeren Oberflächen (56a, b; 58a, b) der Seiten des "U" den zweiten Schleifkontakt bilden.
  14. Stecken nach Anspruch 11, 12 oder 13, dadurch gekennzeichnet, daß Mittel (144) vorgesehen sind, um zu verhindern, daß der Stecker (22) in einer herkömmlichen Zigarrenanzünder-Steckerbuchse (130) betätigt wird.
  15. Verbindung mit einer Steckerbuchse gemäß einem der Ansprüche 1 bis 10 und einem Stecker gemäß einem der Ansprüche 11 bis 14.
EP19870308845 1987-10-06 1987-10-06 Steckerbuchse mit Stecker Expired - Lifetime EP0310718B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19873789383 DE3789383T2 (de) 1987-10-06 1987-10-06 Steckerbuchse mit Stecker.
EP19870308845 EP0310718B1 (de) 1987-10-06 1987-10-06 Steckerbuchse mit Stecker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19870308845 EP0310718B1 (de) 1987-10-06 1987-10-06 Steckerbuchse mit Stecker

Publications (2)

Publication Number Publication Date
EP0310718A1 EP0310718A1 (de) 1989-04-12
EP0310718B1 true EP0310718B1 (de) 1994-03-16

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870308845 Expired - Lifetime EP0310718B1 (de) 1987-10-06 1987-10-06 Steckerbuchse mit Stecker

Country Status (2)

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EP (1) EP0310718B1 (de)
DE (1) DE3789383T2 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE45897E1 (en) 2008-04-14 2016-02-23 Stanley Black & Decker, Inc. Battery management system for a cordless tool
US9406915B2 (en) 2014-05-18 2016-08-02 Black & Decker, Inc. Power tool system

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5376022A (en) * 1993-12-06 1994-12-27 Safco Corporation Electrical connector
US6682356B2 (en) * 2002-03-14 2004-01-27 Wingcast, Llc Peripheral device port for motor vehicles
US9893384B2 (en) 2014-05-18 2018-02-13 Black & Decker Inc. Transport system for convertible battery pack
EP3560062A4 (de) 2016-12-23 2020-06-24 Black & Decker Inc. Schnurloses elektrowerkzeugsystem

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1423103A (fr) * 1964-11-20 1966-01-03 Axo Soc Perfectionnements aux appareils électriques pour l'allumage du tabac
US3453578A (en) * 1967-02-10 1969-07-01 Amp Inc Electrical plug connector
US3932020A (en) * 1974-03-29 1976-01-13 The United States Of America As Represented By The Secretary Of The Army Electrical connectors
DE7733921U1 (de) * 1977-11-04 1978-07-20 Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh, 8000 Muenchen Kupplungsteil

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE45897E1 (en) 2008-04-14 2016-02-23 Stanley Black & Decker, Inc. Battery management system for a cordless tool
US9406915B2 (en) 2014-05-18 2016-08-02 Black & Decker, Inc. Power tool system
US9583793B2 (en) 2014-05-18 2017-02-28 Black & Decker Inc. Power tool system

Also Published As

Publication number Publication date
DE3789383T2 (de) 1994-06-23
DE3789383D1 (de) 1994-04-21
EP0310718A1 (de) 1989-04-12

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