Sealing cable penetration for shielded cables

• US 5,917,153 A
• Filed: 09/11/1997
• Issued: 06/29/1999
• Est. Priority Date: 03/24/1995
• Status: Expired due to Fees

• Current Assignee: Jacob GmbH
• Original Assignee: Jacob GmbH
• Inventors: Geroldinger, Arnold
• Primary Examiner(s): Kincaid, Kristine
• Assistant Examiner(s): Nguyen, Chau N.
• Application Number:
  US08/913,670
• Time in Patent Office: 656 Days
• Field of Search: 174/88 C, 174/89, 174/35 C, 174/70 R, 174/75 C, 174/65 R, 174/84 R, 174/85, 174/655 S, 439/583, 439/584, 285/245, 285/246, 285/250
• US Class Current: 174/88.00C
• CPC Class Codes: H02G 15/04 Cable-end sealings
• CPC Class Codes: H05K 9/0018 with provisions to reduce aperture leakages in walls, e.g. terminals, connectors, cables

Abstract

The RF-proof cable penetration having a seal (9) for shielded cables, having a tubular threaded stub (7) which is to be inserted into a bore, and a locking nut (10) which is to be tightened onto the threaded stub, and having an annular clamping disk (8) which is forced, by a pinch seal (9) which is to be pressed on by the locking nut (10), against an annular shoulder on the threaded stub (7), is equipped according to the invention with a shielding sleeve (4) which has at least one radially projecting shoulder (6) at the front of the inner end. Furthermore, a stamping sleeve (5) is present which is to be pushed over the shielding sleeve (4) on the outside of the cable shield (3). In order to ensure a certain axial displaceability of the cable during mounting, the preassembled cable, provided with shielding sleeve (4) and mounted stamping sleeve (5), can be displaced axially relative to the threaded stub (7) owing to the fact that an annular shoulder has a continuous axial recess (12) in the interior of the threaded stub (7).

By contrast with known EMC-capable cable threaded unions, the invention has the advantage that during the process of working the cable "fraying" of the shielding braid (3) is impossible on the cable, and parts of the shielding braid cannot break off, because co-rotation of the cable during tightening is prevented by latching the shielding sleeve (4) in the interior of the threaded stub (7). The time for mounting the cable can be substantially reduced.

Claims

1. A sealing cable penetration for shielded cables, comprising:

a tubular threaded stub (7) which is to be inserted into a bore of a housing wall,

a locking nut (10) which is to be tightened onto a thread of the threaded stub 7 the thread being on the outside of the housing wall, and

an annular clamping disk (8) which can be axially displaced in the interior of the threaded stub and is forced, by a pinch seal (9) which is to be pressed on by the locking nut (10), against a radially inwardly projecting annular shoulder (13) on the threaded stub (7),

a shielding sleeve (4) which is to be inserted between a cable shield (3) and cable strands (2) and has at least one radially projecting shoulder (6) at the front end of the cable shield (3),

a stamping sleeve (5) which is to be pushed over the shielding sleeve (4) on the outside of the cable shield (3), and

at least one continuous axial recess (12), fitted to the at least one radial shoulder (6) of the shielding sleeve (4), in the annular shoulder (13) of the threaded stub (7).

2. A cable penetration as claimed in claim 1, which comprises at least one sunken recess (11) which is fitted to at least one radial shoulder (6) of the shielding sleeve (4), facing the cable shield (3), on the inside of the annular shoulder (13) at a position rotated with respect to the continuous radial recess (12) and is intended to latch against rotation of, and improve the contact of the shielding sleeve (4) fixed by the stamping sleeve (5).

3. A cable penetration as claimed in claim 1, wherein the stamping sleeve (5) is made of a softer material than the shielding sleeve (4).

4. A cable penetration as claimed in claim 3, wherein the stamping sleeve (5) is made of copper, and the shielding sleeve (4) is made of brass.

5. A cable penetration as claimed in claim 1, wherein for the purpose of improving the electric contact resistance, the pinch seal (9) is formed by an elastomer having embedded conducting wires.