US20060087116A1 - One-piece liquid-tight connector - Google Patents

One-piece liquid-tight connector Download PDF

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Publication number
US20060087116A1
US20060087116A1 US10/971,290 US97129004A US2006087116A1 US 20060087116 A1 US20060087116 A1 US 20060087116A1 US 97129004 A US97129004 A US 97129004A US 2006087116 A1 US2006087116 A1 US 2006087116A1
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US
United States
Prior art keywords
sleeve
ferrule
conduit
strap
free
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.)
Abandoned
Application number
US10/971,290
Inventor
Michael Gardner
Robert White
Bettie White
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.)
Halex Co
Original Assignee
Halex Co
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 Halex Co filed Critical Halex Co
Priority to US10/971,290 priority Critical patent/US20060087116A1/en
Assigned to HALEX/SCOTT FETZER COMPANY reassignment HALEX/SCOTT FETZER COMPANY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WHITE, ROBERT R. (DECEASED), GARDNER, MICHAEL J.
Publication of US20060087116A1 publication Critical patent/US20060087116A1/en
Abandoned legal-status Critical Current

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L21/00Joints with sleeve or socket
    • F16L21/06Joints with sleeve or socket with a divided sleeve or ring clamping around the pipe-ends
    • F16L21/065Joints with sleeve or socket with a divided sleeve or ring clamping around the pipe-ends tightened by tangentially-arranged threaded pins
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L21/00Joints with sleeve or socket
    • F16L21/08Joints with sleeve or socket with additional locking means

Abstract

A liquid-tight electrical connector formed by a one-piece, zinc die cast member including a ferrule insertable into a conduit, and a sleeve body surrounding the ferrule to form a conduit receiving channel, the sleeve body having a strap section that can be drawn tight around a conduit to secure it in the channel.

Description

    FIELD OF THE INVENTION
  • The present invention relates generally to electrical connectors, and more specifically to liquid-tight electrical connectors for securing flexible metallic and non-metallic liquid-tight conduit to various devices, such as metal outlet boxes, conduit bodies and the like.
  • BACKGROUND OF THE INVENTION
  • Typical liquid-tight connectors have several components which must be carefully assembled to affect the desired connection. One such assembly includes a compression nut, a bushing, a ferrule, and a body member or bushing having exterior threads. The assembly operation is carried out in the field and involves the steps of telescoping the compression nut over the end of the conduit, placing the bushing over the end of the conduit, inserting the ferrule into the conduit, sliding the nut and bushing toward the end of the conduit, and then threading or tightening the compression nut onto the body. The assembly procedure is time consuming and must be carried out with care to avoid misalignment of the various parts and consequent leakage.
  • Another multi-part prior art liquid-tight connector is disclosed in U.S. Pat. No. 6,616,194. The preferred embodiment disclosed in this patent includes a body member or bushing having an integral, rearwardly extending ferrule. A separate sleeve surrounds the ferrule in spaced relation to form a conduit-receiving channel. The sleeve has inwardly bent tangs that bite into the conduit in order to inhibit withdrawal of the conduit. The sleeve is surrounded and held in place by a third cylindrical member or cover that is threaded onto the bushing. All three members require an assembly operation. The forward end of the bushing or body has a threaded neck that receives a washer and snap ring so that the entire connector consists of five separate pieces.
  • SUMMARY OF THE INVENTION
  • An object of the present invention is to provide a one-piece, liquid-tight connector member that avoids the assembly problems associated with the prior art multiple part connectors.
  • Another object of the invention is to provide a one-piece, liquid-tight connector member having a construction that permits full and proper insertion of the conduit, and provides a strong grip around the conduit to prevent its withdrawal, thereby assuring a reliable, liquid-tight connection.
  • A further object of the invention is to provide a one-piece liquid-tight connector member having the advantages described above that can be made as a one-piece zinc die casting.
  • In accordance with a disclosed embodiment of the invention, the new and improved one-piece liquid-tight connector member comprises a ferrule having a free end that is insertable into a conduit and a fixed end, and a sleeve body that surrounds the ferrule to form a conduit-receiving channel, the sleeve body being joined to the fixed end of the ferrule to form a closed end for the channel and having a free end portion adjacent the free end of the ferrule in order to form an open end for the channel. The free end of the sleeve body has a flexible strap section extending partially around the ferrule, the strap section having a fixed end joined to and forming part of the sleeve body and a free end that can be drawn tightly around a conduit in the channel and releasably secured to an adjacent part of the sleeve body. The free end of the strap section and the adjacent part of the sleeve body are formed with confronting ears that receive a threaded fastener that can be tightened to secure the conduit in the channel.
  • In one embodiment, the connector member has a tubular nose that is coaxial with and extends away from the ferrule. A liquid-tight gasket and a lock nut are engaged on the threaded nose for securing the connector member to an outlet box, a conduit body or other enclosure. In another embodiment, the one-piece connector member includes an integral elbow that forms a continuation of and extends away from the ferrule. The elbow may have a threaded end on which is mounted a lock nut and gasket.
  • In still other embodiments of the invention, the threaded end of the nose or elbow is replaced by a snap-in finger structure such as disclosed in application Ser. No. 10/669,489, filed Sep. 23, 2003, the disclosure of which is incorporated herein by reference.
  • The unique one-piece construction that includes a flexible strap section that can be tightened around the conduit inserted in the conduit-receiving channel assures a firm connection that prevents inadvertent withdrawal of the conduit from the connector. The channel itself has no obstructions along its length, such as inwardly extending tangs, etc., whereby the conduit can be fully and correctly inserted even though the conduit may have burrs on its end as a result of being cut.
  • Other advantages and a fuller understanding of the invention will be had from the following detailed description and the accompanying drawings.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is an exploded, perspective view of one embodiment of the invention;
  • FIG. 2 is an elevational view of the assemblies embodiment of FIG. 1;
  • FIG. 3 is an end elevational view taken in the plane of the line 3-3 of FIG. 2;
  • FIG. 4 is a side elevational view taken in the plane of line 4-4 of FIG. 3;
  • FIG. 5 is an enlarged, cross-sectional view of the embodiment of FIGS. 1-4 showing the end of a conduit inserted into the one-piece member;
  • FIG. 6 is a cross-sectional view taken along the line 6-6 of FIG. 5;
  • FIG. 7 is an elevational view of another embodiment of the invention;
  • FIG. 8 is an end elevational view taken in the plane of the line 8-8 of FIG. 7;
  • FIG. 9 is an enlarged, cross-sectional view taken on the line 9-9 of FIG. 8;
  • FIG. 10 is a side elevational view of the third embodiment of the invention;
  • FIG. 11 is an elevational view taken in the plane of the line 11-11 in FIG. 10;
  • FIG. 12 is an elevational view of a fourth embodiment of the invention; and
  • FIG. 13 is an elevational view taken in the plane of the line 13-13 of FIG. 13.
  • DESCRIPTION OF PREFERRED EMBODIMENTS
  • Referring now to the drawings, FIGS. 1-6 show a zinc die cast, one-piece liquid-tight connector member 20 constructed in accordance with the present invention. The one-piece member 20 includes a tubular ferrule 21 that is insertable into the end of a conduit 22 as shown in FIGS. 5 and 6, and a surrounding sleeve body 23 that is radially spaced from the ferrule 21 so as to define a conduit receiving channel 24.
  • The ferrule 21 has a free end 25 and a fixed end 26 that is joined to the sleeve body 23 to form a closed end 27 of the channel 24. The free end 25 of the ferrule 21 is radially spaced from the free end portion 28 of the sleeve body 23 so as to define an open end of the channel 24. As shown most clearly in FIG. 5, the walls of the channel 24 are tapered toward the closed end 27 in order to compress non-metallic conduit and the jacket of metallic conduit, thereby providing exceptional sealing capacity.
  • A semi-circular slot 35 is formed through the side wall of the sleeve body 23 between its ends. The slot 35, which is shown extending approximately half way around the sleeve body 23, forms the side of a flexible strap section 37 which has a free end 38 and a fixed end 39 integral with the sleeve body 23.
  • The strap section 37 of the sleeve body 23 can be tightened around a conduit 22 seated in the conduit receiving channel 24 as shown in FIGS. 5 and 6. To this end, the free end 38 of the strap section 37 and the adjacent part of the sleeve body 23 have confronting ears 42, 43, respectively. A threaded fastener 41 extends freely through a hole in the ear 42 and through a threaded opening in the ear 43. A radially inwardly extending rib 40 is formed part way around the inside of the strap section 37. When the strap section 37 is tightened, the rib 40 clamps down on the conduit 22 so that it is firmly gripped by the strap section, thereby providing excellent retention against axial pullout of the conduit.
  • The one-piece member 20 has an external collar or flange 50. In the embodiment of FIGS. 1-6, a threaded nose 51 forming the leading end of the member 20 extends away from the flange 50 in a direction opposite to the ferrule 21. A lock nut 52 is threaded on the nose 51 and a liquid tight washer 53 is located between the lock nut 52 and the flange 50.
  • In use, the conduit 22 is inserted through the open end of the conduit receiving channel 24 and is wedged against the tapered walls at the closed end 27 of the channel. The seating of the conduit 22 between the tapered walls provides good sealing capacity. The screw 41 is inserted through the ear 42 and is threaded into the ear 43 to draw the ears together, whereby the conduit 22 is firmly clamped in the channel 24 by the strap section 37. The strap section 37 provides a strong and reliable, radially clamping action that prevents withdrawal of the conduit. Since the channel 24 is open from its open end to its closed end, the conduit can be inserted fully and correctly with minimum interference to assure a liquid-tight connection. When mounting the connector member 20 to the wall of an outlet box or the like, the nose 51 is inserted through the hole of the wall with the washer 53 against the outside face. The lock nut 52 is then threaded on the nose against the inside surface in the usual manner.
  • FIGS. 7-9 illustrate a modification of the invention in which the nose or leading end of the one-piece member is constructed as disclosed in the above-referenced application Ser. No. 10/669,489 to provide a quick connect, snap-in connection. The one-piece, zinc die cast member is generally designated by reference numeral 60. The trailing end of the member 60 is constructed in the same manner as described above in connection with FIGS. 1-6 and includes a tubular ferrule 61 that is insertable into the end of a conduit 62, a surrounding sleeve body 63 that is radially spaced from the ferrule 61 so as to define a conduit receiving channel 64 which has a fixed end joined to the sleeve body 63 to form a closed end 65 of the channel 64. A semi-circular slot 66 is formed through the side wall of the sleeve body 63 to form the sides of a flexible strap section 67 which has a radially inwardly extending rib 68 that bites into the conduit 62 when the strap section is tightened by the threaded fastener 69. The leading end or nose 70 of the one-piece member 60 has two locking fingers 71 spaced 180° apart and tensioning fingers 72 adjacent to and on each side of each locking finger 71. The fingers 71, 72 are separated by notches 73 in the end portion 70 of the member 60. In use, a snap-fit with a junction box or the like (not shown) causes the fingers 71, 72 to flex inwardly. The locking fingers 71 are pushed through the opening of the box wall and engage its inner surface to prevent the fitting from being withdrawn. At the same time, the tensioning fingers 72 engage the edge of the opening and serve to provide firm contact between the fitting 60 and the box, as well as keeping the fitting centered in the box opening.
  • FIGS. 10 and 11 illustrate a third embodiment 80 which is constructed in the same manner as member 20 described in connection with FIGS. 1-6 except that the member 80 includes an elbow 81 at the leading end of the member. In FIGS. 10 and 11, the parts corresponding to member 20 have the same reference numbers. The elbow 81 that extends from the leading end of the member 80 has a threaded free end 82. A locknut 52 and a gasket 53 are mounted on the threaded end portion 81.
  • FIGS. 12 and 13 show still another embodiment of the invention which is similar to the embodiment of FIGS. 10 and 11 except that the end of the elbow is provided with quick connect, snap-in fingers as described above in connection with the embodiment of FIGS. 7-9. The one-piece member in FIGS. 12 and 13 is generally designated by reference number 90 and includes an elbow 91. The snap-in finger structure is the same as described above in connection with FIGS. 7-9 and includes locking fingers 92 and tensioning fingers 93 adjacent to and on each side of the locking fingers 92.
  • Many other modifications and variations of the invention will be apparent to those skilled in the art in light of the foregoing detailed disclosure. Therefore, it is to be understood, that within the scope of the appended claims, the invention can be practiced otherwise than specifically shown and described.

Claims (11)

1. A one-piece liquid-tight connector member comprising a tubular ferrule having a free end for insertion into a conduit and a fixed end, and a sleeve body surrounding the ferrule to form a conduit-receiving channel, said sleeve body being joined to said fixed end of said ferrule to form a closed end for said channel and having a free end adjacent said free end of said ferrule to form an open end for said channel, a semi-circular slot through the side wall of said sleeve body forming a flexible strap section, said strap section having a fixed end and a free end that can be drawn toward an adjacent part of said sleeve body to clamp a conduit in said channel.
2. A one-piece liquid-tight connector as claimed in claim 1 wherein said strap section includes a radially inwardly extending rib around at least part of said strap section.
3. A one-piece liquid-tight connector as claimed in claim 1 including confronting ears on said free end of said strap section and an adjacent edge of said sleeve body, and a fastener engaged through said ears for tightening said strap section around a conduit.
4. A one-piece liquid-tight connector as claimed in claim 1 including a tubular nose coaxial with said ferrule and extending from said sleeve body in a direction opposite to said ferrule.
5. A one-piece liquid-tight connector member as claimed in claim 1 including an elbow extending from said sleeve body in a direction opposite to said ferrule.
6. A one-piece, zinc die cast, liquid-tight connector member comprising a tubular ferrule having a free end and a fixed end, a sleeve body surrounding said ferrule in spaced relationship to form a conduit receiving channel, said sleeve body having one end joined to said fixed end of said ferrule to form a closed end for said channel and an opposite end portion adjacent said free end of said ferrule forming an open end for said channel, said sleeve body having a flexible strap section extending partially around said ferrule, said strap section being formed by a semi-circular slot through the side wall of said sleeve body and having a fixed end and a free end that can be drawn toward an adjacent edge of said sleeve body to clamp a conduit in said channel, said strap section including a radially inwardly extending rib around at least a portion of its inner wall, said rib being engageable with the conduit.
7. A one-piece liquid-tight connector member as claimed in claim 6 including confronting ears on said free end of said strap section and an adjacent edge of said sleeve body, and a threaded member engaged through said ears for drawing them together.
8. A one-piece liquid-tight connector member as claimed in claim 7 including a leading end extending away from said sleeve body in a direction opposite to said ferrule.
9. A one-piece liquid-tight connector member as claimed in claim 8 wherein said leading end has two locking fingers spaced 180° apart and tensioning fingers adjacent to and on each side of said locking fingers, said locking fingers and tensioning fingers being separated by notches.
10. A one-piece liquid-tight connector member as claimed in claim 9 wherein said leading end comprises a tubular nose coaxial with said ferrule and extending from said sleeve body.
11. A one-piece liquid-tight connector member as claimed in claim 9 wherein said leading end comprises an elbow extending from said sleeve body.
US10/971,290 2004-10-22 2004-10-22 One-piece liquid-tight connector Abandoned US20060087116A1 (en)

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Application Number Priority Date Filing Date Title
US10/971,290 US20060087116A1 (en) 2004-10-22 2004-10-22 One-piece liquid-tight connector

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US10/971,290 US20060087116A1 (en) 2004-10-22 2004-10-22 One-piece liquid-tight connector
US11/613,320 US7325838B2 (en) 2004-10-22 2006-12-20 One-piece liquid-tight connector

Related Child Applications (1)

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US11/613,320 Continuation US7325838B2 (en) 2004-10-22 2006-12-20 One-piece liquid-tight connector

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US20060087116A1 true US20060087116A1 (en) 2006-04-27

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US11/613,320 Expired - Fee Related US7325838B2 (en) 2004-10-22 2006-12-20 One-piece liquid-tight connector

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7963567B2 (en) * 2007-04-27 2011-06-21 Securus, Inc. Anti-rotation pipe locator and holder
DE202008005929U1 (en) * 2008-04-29 2009-09-03 Voss Automotive Gmbh Connecting device for media lines in the region of a wall duct and wall element
JP5132423B2 (en) * 2008-05-22 2013-01-30 昭男 荒井 Through-duct member and hollow wall duct structure using the member
WO2015148908A1 (en) * 2014-03-28 2015-10-01 Heyco, Inc. Liquid-tight strain relief

Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1138074A (en) * 1910-09-29 1915-05-04 William A Bonnell Connector.
US1491873A (en) * 1920-11-10 1924-04-29 Thomas & Betts Corp Adapter for connecting devices
US1888546A (en) * 1930-04-05 1932-11-22 Appleton Electric Co Box connection or elbow
US1901897A (en) * 1931-03-11 1933-03-21 Nat Electric Prod Corp Elbow fitting for electrical systems
US2220874A (en) * 1937-10-20 1940-11-05 Harry F Waters Method for the manufacture of containers
US2967722A (en) * 1959-05-18 1961-01-10 Lifka Charles Angular connector fittings for flexible conduit
US3262188A (en) * 1962-12-10 1966-07-26 Roach Appleton Mfg Company Method of making electrical conduit connector
US4103101A (en) * 1977-03-28 1978-07-25 William Maier Outlet box connector and combination
US4730855A (en) * 1981-04-15 1988-03-15 B.P. Technologies Elbow pipe for electric conduit
US6044868A (en) * 1995-02-24 2000-04-04 Arlington Industries, Inc. Watertight fitting for flexible non-metallic conduit
US6248952B1 (en) * 1999-03-15 2001-06-19 Delphi Technologies, Inc. Wiring protection dress for automotive electrical wiring extending between a splash shield and tubular conduits
US6460638B1 (en) * 2001-10-01 2002-10-08 Actuant Corporation Bushing for protecting an electrical wire passing through a hole in a structural member
US6585297B2 (en) * 2000-09-20 2003-07-01 Heyco, Inc. Single-piece liquid-tight connector with snap-on cuff
US6616194B1 (en) * 2001-10-22 2003-09-09 Arlington Industries, Inc. Liquid tight connector
US6637777B2 (en) * 2002-03-05 2003-10-28 Pent Products, Inc. Low-profile conduit elbow

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Publication number Priority date Publication date Assignee Title
US1255417A (en) * 1916-04-26 1918-02-05 Ernest W Hedges Threadless-pipe system for conductors and for conveying the voice.
BE579161A (en) * 1958-05-30
US6278952B1 (en) * 1998-12-08 2001-08-21 William H Swain Reliability gage for non-contact ammeters
US6262188B1 (en) * 1998-12-23 2001-07-17 General Electric Company Functionalized MQ resin as an adhesion enhancing additive

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1138074A (en) * 1910-09-29 1915-05-04 William A Bonnell Connector.
US1491873A (en) * 1920-11-10 1924-04-29 Thomas & Betts Corp Adapter for connecting devices
US1888546A (en) * 1930-04-05 1932-11-22 Appleton Electric Co Box connection or elbow
US1901897A (en) * 1931-03-11 1933-03-21 Nat Electric Prod Corp Elbow fitting for electrical systems
US2220874A (en) * 1937-10-20 1940-11-05 Harry F Waters Method for the manufacture of containers
US2967722A (en) * 1959-05-18 1961-01-10 Lifka Charles Angular connector fittings for flexible conduit
US3262188A (en) * 1962-12-10 1966-07-26 Roach Appleton Mfg Company Method of making electrical conduit connector
US4103101A (en) * 1977-03-28 1978-07-25 William Maier Outlet box connector and combination
US4730855A (en) * 1981-04-15 1988-03-15 B.P. Technologies Elbow pipe for electric conduit
US6044868A (en) * 1995-02-24 2000-04-04 Arlington Industries, Inc. Watertight fitting for flexible non-metallic conduit
US6248952B1 (en) * 1999-03-15 2001-06-19 Delphi Technologies, Inc. Wiring protection dress for automotive electrical wiring extending between a splash shield and tubular conduits
US6585297B2 (en) * 2000-09-20 2003-07-01 Heyco, Inc. Single-piece liquid-tight connector with snap-on cuff
US6460638B1 (en) * 2001-10-01 2002-10-08 Actuant Corporation Bushing for protecting an electrical wire passing through a hole in a structural member
US6616194B1 (en) * 2001-10-22 2003-09-09 Arlington Industries, Inc. Liquid tight connector
US6637777B2 (en) * 2002-03-05 2003-10-28 Pent Products, Inc. Low-profile conduit elbow

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US20070090642A1 (en) 2007-04-26

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AS Assignment

Owner name: HALEX/SCOTT FETZER COMPANY, OHIO

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:GARDNER, MICHAEL J.;WHITE, ROBERT R. (DECEASED);REEL/FRAME:016331/0080;SIGNING DATES FROM 20050201 TO 20050208

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION