WO1997008778A1 - Coaxial cable end connector with integral moisture seal - Google Patents
Coaxial cable end connector with integral moisture seal Download PDFInfo
- Publication number
- WO1997008778A1 WO1997008778A1 PCT/US1996/012413 US9612413W WO9708778A1 WO 1997008778 A1 WO1997008778 A1 WO 1997008778A1 US 9612413 W US9612413 W US 9612413W WO 9708778 A1 WO9708778 A1 WO 9708778A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- seal element
- internal thread
- connector
- end connector
- mandrel
- Prior art date
Links
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
- H01R13/46—Bases; Cases
- H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
- H01R13/5219—Sealing means between coupling parts, e.g. interfacial seal
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
- H01R9/03—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections
- H01R9/05—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections for coaxial cables
- H01R9/0521—Connection to outer conductor by action of a nut
Definitions
- This invention relates to coaxial cable end connectors having nut members adapted to be threaded onto equipment ports or the like, and is concerned in particular with an improved sealing arrangement for preventing moisture from penetrating between the coactively engaged threads of such components.
- a primary objective of the present invention is the provision of a coaxial cable end connector having a rotatable nut member with an integrally associated internal sealing element configured and dimensioned to be readily deformed into a tightly sealed relationship between the internal thread of the nut member and the external thread of a port or other like system component onto which the nut is threaded.
- Another objective of the present invention is the provision of a seal which provides reliable moisture-tight integrity irrespective of the extent to which the nut member is initially tightened.
- the nut member of a coaxial cable end connector is provided with a sealing element positioned within and deformed into interengagement with its internal thread.
- the sealing element is axially fixed intermediate the internal thread ends, and has an inner diameter sized for engagement and deformation by the external thread of a port or other like system component onto which the nut is threaded during attachment of the end connector. The thus deformed sealing element reliably prevents moisture penetration between the interengaged internal and external threads.
- Figure 1 is a longitudinal section through a coaxial cable end connector having a nut member with an integrally associated seal element in accordance with the present invention, the end connector being shown secured to an end of a coaxial cable, with the nut member threaded onto an equipment port;
- Figure 2 is an enlarged partial sectional view of the nut member with the sealing element shown axially separated therefrom;
- Figure 3 is an end view of the seal element shown in Figure 2;
- Figure 4 is an illustration of a tool for inserting the seal element into the nut member, with the seal element shown prior to insertion;
- Figure 5 is an illustration similar to Figure 4 showing the seal element inserted into the nut member and deformably expanded by the tool member;
- Figure 6 is an illustration showing the seal element following its insertion into the nut member;
- Figures 7, 7 A, 8 and 8 A are enlarged partial sectional views of the nut member showing alternative embodiments of seal elements in accordance with the present invention.
- Figure 9 is a greatly enlarged partial sectional view of interengaged male and female threads, showing the manner in which the seal element is deformably arranged and partially punctured therebetween.
- an end connector 2 is shown coupling one end of a coaxial cable 4 to an equipment port 6.
- End connector 2 is of the radial compression type described in copending U.S. Patent Application Serial No. 08/304,562 filed September 12, 1994, the disclosure of which is herein inco ⁇ orated by reference in its entirety.
- the end connector has a tubular body 8 having a front end supporting a rotatable nut member 10, and a rear end adapted for insertion into the end of the cable 4.
- the connector body 8 further includes an integral outer collar 12 surrounding and fixed relative to the rear end of the connector body to define an annular chamber 14.
- a tubular locking member 16 protrudes into the annular chamber 14 and cooperates with the collar 12 and rear end of the body 8 when in its clamped position as shown in Figure 1 to fix the connector to the cable end.
- the nut member 10 has an internal thread 18 adapted to coact in threaded engagement with an external thread 20 on the port 6.
- a sleeve-like sealing element 22 is interposed between the coactively engaged threads 18,
- the internal thread 18 has an axial length lj, major and minor diameters d,, d 2 , a pitch p and thread angle « configured to coact in threaded engagement with the external thread 20 on the port 14.
- the seal element 22 is circular in cross section, extruded or otherwise formed of a non-metallic yieldably deformable material, and with an axial length 1 2 greater than the pitch p and preferably only slightly shorter than the axial length 1, of the internal thread 18. In the unexpanded condition shown in Figures 2 and 3, the outer diameter d 3 of the seal element 22 is slightly smaller than the minor thread diameter d 2 .
- a preferred material for the seal element 22 is polytetrafluoroethylene ("PTFE").
- Tool 24 includes a tubular barrel _26 defming an interior chamber 28 closed at one end by wall 30 and closed at the opposite end by plug 32.
- One end of a resiliently expandable mandrel 34 protrudes through an opening 36 in wall 30.
- Mandrel 34 has a central passageway 35 with an enlarged diameter entry end 35a.
- a plunger 38 is located in the chamber 28.
- Plunger 38 has a barrel 40 which protrudes through an opening 42 in plug 32 to terminate in an enlarged diameter external head 44, and a stem 46 aligned axially with, and as shown in Figure 4, protruding into the entry end 35a of the passageway 35 in the mandrel 34.
- a compression spring 48 surrounds the stem 46 and is confined axially between an annular shoulder 49 on the plunger 38 and a washer 50 bearing against an annular collar 52 on the mandrel 34, the collar 52 being held against the end wall 30 by the spring 48 acting through the washer 50.
- the seal element 22 is axially mounted over the exposed end of the mandrel 34.
- the thus mounted seal element is then inserted into the nut member 10, after which the plunger 38 is advanced to force the stem 46 along the central passageway 35 of the mandrel 34.
- the mandrel is thus expanded radially, causing the seal element 22 to be radially expanded and to become permanently deformed into the internal thread 18.
- the stem 46 is then retracted from the mandrel 34 under the action of spring 48, thus allowing the mandrel to radially retract to its original diameter, and permitting the mandrel to be withdrawn from the expanded seal element.
- the mandrel may alternatively be fabricated as a split metallic sleeve, the external surface of which may additionally be threaded or serrated.
- the seal element 22 remains deformed into and mechanically interengaged with the internal thread 18, and as such is axially anchored within the nut member _10.
- the seal element 22 thus lines at least a portion of the axial length lj of the internal thread 18 at a location intermediate its ends.
- the seal element is expanded beyond the minor diameter d 2 and well into the internal thread 18, with portions of the seal element being hard up against the base of the internal thread at its major diameter d 2 .
- the wall thickness of the seal element 22 is dependent upon thread tolerances, and is selected to achieve the desired moisture-tight seal. For a typical cable end connector application, the wall thickness of the seal element will range from about 2 mils to 8 mils, and for most applications will be about 5 mils.
- the axial expansion and accompanying permanent deformation of the seal element 22 into a secure mechanical interlock with the internal thread 18 will resist any tendency of the seal element to drop out or otherwise become dislodged from the nut member during shipment and subsequent use.
- FIGS 7, 7A, 8 and 8A disclose alternative embodiments of seal elements.
- the seal element comprises an annular ring 54 seated in a circular groove 56 located approximately midway along the length of the internal thread 18.
- the ring 54 is non-metallic, and as shown in Figure 7 A, is deformable by the male thread 20 with which the nut is engaged.
- the seal element comprises a non-metallic deformable sleeve 58 of the type shown in Figures 1-6. Here, however, one end of the sleeve is deformed radially outwardly into the circular groove 56 by a snap ring 60. As shown in Figure 8,
- the sleeve 58 is again deformed into conformity with the internal thread 18 by the male thread 20 with which the nut is engaged.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU66405/96A AU6640596A (en) | 1995-08-25 | 1996-07-30 | Coaxial cable end connector with integral moisture seal |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/519,654 US5571028A (en) | 1995-08-25 | 1995-08-25 | Coaxial cable end connector with integral moisture seal |
US08/519,654 | 1995-08-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997008778A1 true WO1997008778A1 (en) | 1997-03-06 |
Family
ID=24069229
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1996/012413 WO1997008778A1 (en) | 1995-08-25 | 1996-07-30 | Coaxial cable end connector with integral moisture seal |
Country Status (5)
Country | Link |
---|---|
US (1) | US5571028A (en) |
AR (1) | AR003344A1 (en) |
AU (1) | AU6640596A (en) |
TW (1) | TW305078B (en) |
WO (1) | WO1997008778A1 (en) |
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- 1995-08-25 US US08/519,654 patent/US5571028A/en not_active Expired - Lifetime
-
1996
- 1996-07-30 WO PCT/US1996/012413 patent/WO1997008778A1/en active Application Filing
- 1996-07-30 AU AU66405/96A patent/AU6640596A/en not_active Abandoned
- 1996-08-05 TW TW085109437A patent/TW305078B/zh active
- 1996-08-23 AR ARP960104101A patent/AR003344A1/en unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2407552A (en) * | 1944-07-01 | 1946-09-10 | Anthony F Hoesel | Pipe thread gasket |
US4828294A (en) * | 1985-09-12 | 1989-05-09 | Vallourec | Threaded joint for steel pipes containing a sealing device located at the level of the threading |
US4869679A (en) * | 1988-07-01 | 1989-09-26 | John Messalingua Assoc. Inc. | Cable connector assembly |
US5055060A (en) * | 1989-06-02 | 1991-10-08 | Gilbert Engineering Company, Inc. | Tamper-resistant cable terminator system |
JPH06109173A (en) * | 1992-09-28 | 1994-04-19 | Nippon Steel Corp | Oil well pipe joint |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 018, no. 393 (M - 1643) 22 July 1994 (1994-07-22) * |
Also Published As
Publication number | Publication date |
---|---|
AU6640596A (en) | 1997-03-19 |
AR003344A1 (en) | 1998-07-08 |
US5571028A (en) | 1996-11-05 |
TW305078B (en) | 1997-05-11 |
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