US3792417A - Strain relief clamp for an electrical connector - Google Patents

Strain relief clamp for an electrical connector Download PDF

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Publication number
US3792417A
US3792417A US00283028A US28302872A US3792417A US 3792417 A US3792417 A US 3792417A US 00283028 A US00283028 A US 00283028A US 28302872 A US28302872 A US 28302872A US 3792417 A US3792417 A US 3792417A
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US
United States
Prior art keywords
strain relief
connector
clamp
relief clamp
fingers
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
US00283028A
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English (en)
Inventor
S Punako
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.)
Amphenol Corp
Original Assignee
Bendix Corp
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 Bendix Corp filed Critical Bendix Corp
Priority to US00283028A priority Critical patent/US3792417A/en
Priority to CA167,411A priority patent/CA978618A/en
Priority to DE19732335527 priority patent/DE2335527A1/de
Priority to GB3349873A priority patent/GB1435759A/en
Priority to JP1973090720U priority patent/JPS5525505Y2/ja
Priority to IT28045/73A priority patent/IT998418B/it
Priority to FR7330250A priority patent/FR2197252B1/fr
Application granted granted Critical
Publication of US3792417A publication Critical patent/US3792417A/en
Assigned to ALLIED CORPORATION, A CORP. OF NY reassignment ALLIED CORPORATION, A CORP. OF NY MERGER (SEE DOCUMENT FOR DETAILS). EFFECTIVE DATE APRIL 1, 1985 Assignors: BENDIX CORPORATION, THE,
Assigned to CANADIAN IMPERIAL BANK OF COMMERCE, NEW YORK AGENCY, AS AGENT reassignment CANADIAN IMPERIAL BANK OF COMMERCE, NEW YORK AGENCY, AS AGENT SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: AMPHENOL CORPORATION
Assigned to AMPHENOL CORPORATION, A CORP. OF DE reassignment AMPHENOL CORPORATION, A CORP. OF DE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ALLIED CORPORATION, A CORP. OF NY
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
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/58—Means for relieving strain on wire connection, e.g. cord grip, for avoiding loosening of connections between wires and terminals within a coupling device terminating a cable
    • H01R13/5804—Means for relieving strain on wire connection, e.g. cord grip, for avoiding loosening of connections between wires and terminals within a coupling device terminating a cable comprising a separate cable clamping part

Definitions

  • a keeper element which includes apertures to facilitate retention of a band or tie string that secures to the clamp all the wires extending from the connector.
  • the bundle of wires extending from the connector is thereby gripped in a firm and immovable position so that all axial and radial movement of the wires which might occur in operation is prevented from being transmitted to the point of connection of the several wires with the connector contacts.
  • One or more apertures in the keeper element makes it possible to secure many or as few as one wire extending from the connector in the aforementioned manner to prevent breaking the connection point of a wire to a contact.
  • FIGURE 6 FIGURE 3 FIGURE I FIGURE 2 BACKGROUND OF THE INVENTION
  • This invention relates to electrical connectors of the type having multiple attachment points for the connection of the ends of several wires and more particularly to a strain relief clamp adapted for attachment to the electrical connector to secure the wires extending from the connector as a bundle in substantially fixed position to prevent stresses from breakingone or more of the connection points of any of the several wires to the contacts of the connector.
  • Wires, connected to electrical connectors, are relatively flexible and are especially subject to wear and tear adjacent to their point of connection to the contacts of the connector. This is particularly'true of the wires to the plug element of a connector assembly since the plug is movable as compared to the receptacle which in some cases remains in a fixed position when mounted to supporting structures such as a wall or bulkhead. During normal operation and use of the connector assembly, any one or more of the wire terminations may become impaired and/or broken. Stresses on the wires to the connector are aggravated by the fact that in many instances stresses are placed on the connections as the wires areforced into out-of-the-way places and small areas.
  • strain relief clamp was developed in the form of a generally tapered fitting which is secured to and projects from the connector, a smaller outer end of which is adjustable to clampingly engage and secure the wires into a bundle. Movement and flexing of the several wires along their lengths is thereby prevented from passing this clamp and being transmitted to the point of the connection of the wires to the contacts of the connector.
  • Examples of a strain relief clamp for a single cable containing multiple wires may be found in US. Pat. No. 1,874,334 entitled Locking Means for Separable Electric Fittings, issued August 30, 1932 to A. H. Nero; US. Pat. No. 2,276,818 entitled Electrical Connecting Device, issued March 17, 1942 to BC. Bellows, Jr.; and U.S. Pat. No. 3,603,913 entitled Strain Relief Clamp for Electrical Wiring Connector,” issued Sept. 7, 1971 to John M. Hasty, Jr.
  • these fittings have been lightened as much as possible by the removal of large portions of the material in the tapered section between fitting ends so that the ultimate part comprises in effect a pair of concentric rings.
  • the larger of these rings is adapted to attach to a standard electrical connector (plug or receptacle) while the smaller ring is adapted to clampingly engage the wire bundle.
  • This invention provides a strain relief clamp for an electrical connector that prevents stresses and strains from being transmitted to the junction of the incoming wires and electricalcontacts regardless of: the number of wires coming into the connector.
  • the invention is a strain relief clamp for an electrical connector characterized by a keeper element (40) that has a plurality of fingers (41,42,43) that in conjunction with a connecting member (44) define one or more openings (45,46) that receive a tying strap or the like for tying one or more wires to the strain relief clamp.
  • Tying straps generally have a larger cross-section at one end and therefore when they are passed through an aperture (45,46) in the keeper section (40) the straps when opened are retained and are less likely to be misplaced or lost.
  • the strain relief clamp on electrical connectors of the type having multiple attachment points for the connections of the ends of several wires extending therefrom comprises: an attaching member (10*) for attaching the clamp to the connector, the attaching member including engagement means (11) for the connection of the clamp to the connector;-and an arm (20,30), carried by and extending in a direction away from the attaching member, the arm terminating in a keeper element (40) which is formed by a plurality of spaced fingers (41,42,43) which extend from the arm in a direction away from the attaching memberto terminate at a connecting member (44) which is connected to each of the fingers to define therewith at least one.
  • FIG. 1 is a diagrammatic view of a strain relief clamp which utilizes the principles of this invention.
  • FIG. 2 is a side view of a strain relief clamp shown in FIG. 1.
  • FIG. 3 is an end view of the strain relief clamp shown in FIG. 1.
  • FIG. 4 is an alternate embodiment of the invention.
  • FIG. is a diagrammatic view of the alternate em-- bodiment shown in FIG. 4.
  • FIG. 6 illustrates how the objects of this invention are achieved when the strain relief clamp is used in combination with an electrical connector.
  • FIG. 7 is an alternate embodiment of the invention where the wires leaving the connector element are required to turn at a 90-degree angle.
  • FIG. 1 illustrates a strain relief clamp having an attachment member 10, for connecting the strain relief clamp to the electrical connector; an arm which includes a root end 20, and a converging portion 30 which extends away from the attaching member a plurality of fingers 41, 42, 43 extending away from the attaching member; and a connecting member 44 which is connected to each of the fingers to define therewith apertures 45, 46.
  • the fingers 41, 42, 43 and the member 44 combine to form what is called a keeper element 40 which receives a strap or the like which is used for tying one or more electrical conductors to the strain relief clamp.
  • FIG. 2 illustrates another view of the strain relief clamp shown in FIG. 1.
  • This view illustrates that the keeper element 40 includes a shoulder 49 that faces in the direction of the attaching member 10.
  • the shoulder 49 together with the step formed between the attaching member 10 and the keeper element 40 operate to confine a strap or the like therebetween which has not passed through one of the apertures 45 in the keeper element 40. Confinement of a strap (not shown) prevents a strap, tied to the clamp, from sliding off the strain relief clamp and thereby losing the benefit of the strain relief clamp.
  • FIG. 3 is an end view of the strain relief clamp shown in FIG. 1 that illustrates the arcuate shape of the arm.
  • FIG. 4 illustrates an alternate embodiment of the invention wherein the arm 20, extending from theattaching member 10 does not include a step before the keeper element 40.
  • the arm has a relatively wide root end that narrows outwardly to terminate in a keeper element 40 that includes one or more apertures 45 and a shoulder 49 facing in the direction of the attaching member 10.
  • the arm 20 is an arcuate member that extends around a portion of the ring-shaped attaching member 10 a sufficient distance to give the arm 20 radial rigidity.
  • FIG. 5 is another view of the strain relief clamp shown in FIG. 4 and illustrates how the keeper element 40 would confine a strap or other tying means between the shoulder 49 and the junction of the fingers 41, 42, 43 with the arm 20.
  • FIG. 6 illustrates how the strain relief clamp 1 is used in combination with an electrical connector to accomplish the objects of the invention.
  • the electrical connector 50 receives a large number of wires 70 therefore the tying means or strap 60 is not placed through one of the apertures in the strain relief clamp but instead is wrapped around the keeper element and the wires to retain the wires in a relatively fixed position.
  • the attaching member 10 is ring-shaped to match the configuration of the electrical connector 50 and includes a plurality of threads 11 that engage the threads on the electrical connector 50 for attaching the ring 10 to the electrical connector 50.
  • knurles or the like 12 are disposed around the periphery of the attaching member 10.
  • the strain relief clamp 1 could have achieved the same purposes as illustrated by passing the strap 60 through one of the apertures and tying the wire 70 to one of the fingers of the strain relief clamp.
  • straps 60 or othertying means ideally suited for this application are disclosed in US. Pat. No. 3,186,047 issued to D. P. Schwester et a]., June 1, 1965; and US. Pat. No. 3,197,829 entitled Binder Strap issued Aug. 3, I965 to J. E. Caveney et al.
  • the latter patent illustrates a binder strap that has one end of a larger cross-section than the other end which therefore allows the binder strap, when placed through one of the apertures, to be retained by the keeper element. This feature is quite practical because it prevents the binder strap from being mislaid when maintenance has been performed on the electrical connector, which occurs frequently.
  • FIG. 7 illustrates an alternate embodiment to the invention shown in FIG. 1.
  • the wires (not shown) would leave the clamp at a right angle as the arm 20 extends at a right angle away from the attaching member 10.
  • the arm 20 could extend across the attaching member 20.
  • the attaching ring 10 may include a slot therein so that the attaching member extends less than 360. This feature would allow the passage of a wire through the ring-shaped attachment member 10 without necessitating the removal of the strain relief clamp and all the wires from the connector when adding an additional wire.
  • any slot in the attaching member can be approximately equal to the wire diameter so as not to unduly weaken the strain relief clamp structurally when threaded onto the electrical connector.
  • the arm may have portions cut away completely so as to lighten the structure. Also, all though the arm is shown extending inwardly the strain relief clamp arm could extend outwardly at right angles to the attaching member 10 and still perform its function. Accordingly, it is intended that the illustrative and descriptive materials herein be used to illustrate the principles of the invention and not to limit the scope thereof.
  • an attaching member for attaching said clamp to said connector, said attaching member including engagement means for the connection of said clamp to said connector;
  • an arm carried by and extending in a direction away from said attaching member, said arm terminating in a keeper element which is formed by a plurality of spaced fingers which extend from said arm in a direction away from said attaching member to terminate at a connecting member which is connected to each of said fingers to define therewith two apertures in said keeper element; a step between said attaching member and said keeper element; and a shoulder, on said connecting member, which faces in the direction of said fingers whereby said step and said shoulder define a surface therebetween adapted to receive and confine the movement of a tying means for tying said wires to said strain relief clamp.
  • said keeper element includes a shoulder on the member defining the free end of said keeper element, said shoulder facing in a direction towards said fingers.
  • strain relief clamp as recited in claim 2 wherein said attaching means includes demountable engagement means for the connection thereof to one end of said connector.
  • strain relief clamp as recited in claim 2 wherein said arm includes said step therein.
  • strain relief clamp is a unitary integral structure.
  • strain relief clamp is a unitary integral structure comprised of plastic.
  • an attaching member for attaching said clamp to said connector, said attaching member including engagement means for the connection of said clamp to said connector;
  • an arm carried by and extending in a direction away from said attaching member, said arm terminating in a keeper element which is formed by a plurality of spaced fingers which extend from said arm in a direction away from said attaching member to terminate at a connecting member which is connected to each of said fingers to define therewith at least one aperture in said keeper element, at least one of said spaced fingers having a shape substantially the same as at least one wire extending from said connector, whereby said wire may be tied to one of said fingers, or if more than one wire is attached to said connector they may be tied to at least two said fingers; a step between said attaching member and said keeper element; and a shoulder, on said con necting member, which faces in the direction of said fingers whereby said step and said shoulder define a surface therebetween adapted to receive and confine the movement of a tying means for tying said wires to said strain relief clamp.

Landscapes

  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Multi-Conductor Connections (AREA)
US00283028A 1972-08-23 1972-08-23 Strain relief clamp for an electrical connector Expired - Lifetime US3792417A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US00283028A US3792417A (en) 1972-08-23 1972-08-23 Strain relief clamp for an electrical connector
CA167,411A CA978618A (en) 1972-08-23 1973-03-28 Strain relief clamp for an electrical connector
DE19732335527 DE2335527A1 (de) 1972-08-23 1973-07-12 Zugentlastungsklemme fuer elektrische steckverbinder
GB3349873A GB1435759A (en) 1972-08-23 1973-07-13 Strain relief clamps for electrical connectors
JP1973090720U JPS5525505Y2 (fi) 1972-08-23 1973-07-31
IT28045/73A IT998418B (it) 1972-08-23 1973-08-21 Dispositivo di bloccaggio contro le sollecitazioni per un connetto re elettrico
FR7330250A FR2197252B1 (fi) 1972-08-23 1973-08-21

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00283028A US3792417A (en) 1972-08-23 1972-08-23 Strain relief clamp for an electrical connector

Publications (1)

Publication Number Publication Date
US3792417A true US3792417A (en) 1974-02-12

Family

ID=23084184

Family Applications (1)

Application Number Title Priority Date Filing Date
US00283028A Expired - Lifetime US3792417A (en) 1972-08-23 1972-08-23 Strain relief clamp for an electrical connector

Country Status (7)

Country Link
US (1) US3792417A (fi)
JP (1) JPS5525505Y2 (fi)
CA (1) CA978618A (fi)
DE (1) DE2335527A1 (fi)
FR (1) FR2197252B1 (fi)
GB (1) GB1435759A (fi)
IT (1) IT998418B (fi)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3005337A1 (de) * 1979-02-28 1980-09-18 Bendix Corp Elektrischer steckverbinder
WO1982003296A1 (en) * 1981-03-23 1982-09-30 Heinrich Andrew L Endbell for electrical connector
US5074805A (en) * 1984-01-28 1991-12-24 Mbb Gmbh Terminal case for plug connectors
US5192224A (en) * 1992-02-19 1993-03-09 Litton Systems, Inc. Connector backshell for use with flexible conduit with an internal strain relief clamp
US5949027A (en) * 1997-06-16 1999-09-07 Dayna Communications Cable management ring
US20020062537A1 (en) * 2000-11-01 2002-05-30 International Business Machines Corporation Device and method for identifying cables
US20020170736A1 (en) * 2001-05-15 2002-11-21 Sumitomo Wiring Systems, Ltd. Wire cover, a connector provided therewith and a fastening method
WO2009048546A1 (en) * 2007-10-10 2009-04-16 Tyco Electronics Corporation Wire clamp system for an electrical connector
WO2010084343A3 (en) * 2009-01-21 2011-06-23 Farrel Roy Brenner Improvements in and relating to electrical connector housings
WO2012011594A1 (en) * 2010-07-20 2012-01-26 Yazaki Corporation Connector
US20140041898A1 (en) * 2012-08-13 2014-02-13 Ho Cheung Article for securing and ordering cables leading away from a key switch
US20150303614A1 (en) * 2014-04-21 2015-10-22 Sumitomo Wiring Systems, Ltd. Connector with grommet

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2824009A1 (de) * 1978-06-01 1979-12-06 Harting Elektronik Gmbh Einrichtung zur zugentlastung fuer griffteile elektrischer steckverbinder
DE3216217C2 (de) * 1982-04-30 1985-01-10 Siemens AG, 1000 Berlin und 8000 München Modulstecker
GB2136220B (en) * 1983-03-03 1986-03-05 Bicc Plc An electric plug assembly
DE3318248A1 (de) * 1983-05-19 1984-11-22 Messerschmitt-Bölkow-Blohm GmbH, 8000 München Mehrpoliger elektrischer stecker, insbesondere rundstecker
GB8426749D0 (en) * 1984-10-23 1984-11-28 Ranton & Co Ltd Electrical accessory connections
FR2734951B1 (fr) * 1995-06-02 1997-09-19 Labinal Dispositif de fixation de cablage a l'arriere d'un connecteur.
US8491328B2 (en) * 2011-10-21 2013-07-23 Tyco Electronics Corporation Electrical connector for terminating a cable

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3603913A (en) * 1969-04-11 1971-09-07 Lockheed Aircraft Corp Strain relief clamp for electrical wiring connector
US3638169A (en) * 1970-01-12 1972-01-25 Panduit Corp Strain relief clamp and assembly
US3732526A (en) * 1971-06-25 1973-05-08 Bendix Corp Electrical connector with improved cable support

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5347211Y2 (fi) * 1974-07-01 1978-11-11

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3603913A (en) * 1969-04-11 1971-09-07 Lockheed Aircraft Corp Strain relief clamp for electrical wiring connector
US3638169A (en) * 1970-01-12 1972-01-25 Panduit Corp Strain relief clamp and assembly
US3732526A (en) * 1971-06-25 1973-05-08 Bendix Corp Electrical connector with improved cable support

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3005337A1 (de) * 1979-02-28 1980-09-18 Bendix Corp Elektrischer steckverbinder
WO1982003296A1 (en) * 1981-03-23 1982-09-30 Heinrich Andrew L Endbell for electrical connector
US5074805A (en) * 1984-01-28 1991-12-24 Mbb Gmbh Terminal case for plug connectors
US5192224A (en) * 1992-02-19 1993-03-09 Litton Systems, Inc. Connector backshell for use with flexible conduit with an internal strain relief clamp
US5949027A (en) * 1997-06-16 1999-09-07 Dayna Communications Cable management ring
US7534129B2 (en) 2000-11-01 2009-05-19 International Business Machines Corporation Device and method for identifying cables
US20020062537A1 (en) * 2000-11-01 2002-05-30 International Business Machines Corporation Device and method for identifying cables
US7134200B2 (en) * 2000-11-01 2006-11-14 International Business Machines Corporation Device and method for identifying cables
US20060276074A1 (en) * 2000-11-01 2006-12-07 International Business Machines Corporation Device and method for identifying cables
US20020170736A1 (en) * 2001-05-15 2002-11-21 Sumitomo Wiring Systems, Ltd. Wire cover, a connector provided therewith and a fastening method
US6762363B2 (en) * 2001-05-15 2004-07-13 Sumitomo Wiring Systems, Ltd. Wire cover and a connector provided therewith
WO2009048546A1 (en) * 2007-10-10 2009-04-16 Tyco Electronics Corporation Wire clamp system for an electrical connector
US20090098762A1 (en) * 2007-10-10 2009-04-16 Tyco Electronics Corporation Wire clamp system for an electrical connector
US7618280B2 (en) 2007-10-10 2009-11-17 Tyco Electronics Corporation Wire clamp system for an electrical connector
WO2010084343A3 (en) * 2009-01-21 2011-06-23 Farrel Roy Brenner Improvements in and relating to electrical connector housings
GB2478894A (en) * 2009-01-21 2011-09-21 Farrel Roy Brenner Improvements in and relating to electrical connector housings
GB2478894B (en) * 2009-01-21 2014-03-05 Farrel Roy Brenner Improvements in and relating to electrical connector housings
WO2012011594A1 (en) * 2010-07-20 2012-01-26 Yazaki Corporation Connector
US9070996B2 (en) 2010-07-20 2015-06-30 Yazaki Corporation Connector
US20140041898A1 (en) * 2012-08-13 2014-02-13 Ho Cheung Article for securing and ordering cables leading away from a key switch
US20150303614A1 (en) * 2014-04-21 2015-10-22 Sumitomo Wiring Systems, Ltd. Connector with grommet
US9431758B2 (en) * 2014-04-21 2016-08-30 Sumitomo Wiring Systems, Ltd Connector with grommet

Also Published As

Publication number Publication date
FR2197252A1 (fi) 1974-03-22
DE2335527A1 (de) 1974-04-18
JPS5525505Y2 (fi) 1980-06-19
CA978618A (en) 1975-11-25
GB1435759A (en) 1976-05-12
JPS49143785U (fi) 1974-12-11
IT998418B (it) 1976-01-20
FR2197252B1 (fi) 1976-05-07

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AS Assignment

Owner name: CANADIAN IMPERIAL BANK OF COMMERCE, NEW YORK AGENC

Free format text: SECURITY INTEREST;ASSIGNOR:AMPHENOL CORPORATION;REEL/FRAME:004879/0030

Effective date: 19870515

Owner name: ALLIED CORPORATION, A CORP. OF NY

Free format text: MERGER;ASSIGNOR:BENDIX CORPORATION, THE,;REEL/FRAME:004765/0709

Effective date: 19850401

AS Assignment

Owner name: AMPHENOL CORPORATION, LISLE, ILLINOIS A CORP. OF D

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ALLIED CORPORATION, A CORP. OF NY;REEL/FRAME:004844/0850

Effective date: 19870602

Owner name: AMPHENOL CORPORATION, A CORP. OF DE, ILLINOIS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ALLIED CORPORATION, A CORP. OF NY;REEL/FRAME:004844/0850

Effective date: 19870602