Clip-based non-metallic fittings for attachment of flexible metallic conduit

Patent metadata

Field	Value
Publication number	US-9748755-B1
Application number	US-201615272271-A
Country	US
Kind code	B1
Filing date	Sep 21, 2016
Priority date	Sep 21, 2016
Publication date	Aug 29, 2017
Grant date	Aug 29, 2017

Abstract

Systems and methods are provided for attaching flexible conduit to a fitting. Prongs of a conduit retention clip contact opposite sides of the flexible conduit in an aperture of the fitting. By aligning the prongs in grooves of the flexible conduit, the flexible conduit is held in place in the aperture of the fitting without sufficient compression to surpass the structural limits of the fitting.

First claim

What is claimed is:

1. A flexible conduit fitting system comprising:
a conduit adapter comprising:
a conduit aperture configured to receive a flexible conduit, the conduit aperture having a central axis;
two guide holes separated across the central axis from one another; and

a conduit retention clip comprising two prongs configured to be inserted in the two guide holes and configured to engage on opposite radial sides of the flexible conduit,
wherein the two guide holes in the conduit adapter are located so that the two prongs as inserted into the guide holes are located tangentially to a minor diameter of the flexible conduit inserted into the conduit aperture.

2. The flexible conduit fitting system of claim 1 , wherein the two guide holes are offset along the central axis by a pitch distance of the flexible conduit.

3. The flexible conduit fitting system of claim 1 , wherein the flexible conduit is flexible metallic conduit and the conduit adapter is a non-metallic conduit adapter.

4. The flexible conduit fitting system of claim 1 , wherein the two prongs of the conduit retention clip are pinched together when in the two guide holes.

5. The flexible conduit fitting system of claim 1 , wherein the conduit adapter is injection molded plastic.

6. The flexible conduit fitting system of claim 1 , further comprising:
a junction box configured to connect wires of one or more electrical devices to one or more wires contained in the flexible conduit.

7. The flexible conduit fitting system of claim 6 , wherein the junction box and the conduit adapter are a single molded plastic part.

8. A system comprising:
a conduit adapter configured to receive a flexible conduit having a minor diameter, a major diameter, and a pitch distance, into an aperture having a central axis;
a first removable conduit retention prong configured to be inserted into a first guide hole in the conduit adapter; and
a second removable conduit retention prong configured to be inserted into a second guide hole in the conduit adapter;
wherein the first guide hole and second guide hole are located across the central axis of the aperture from one another and the first guide hole and second guide hole are separated by a distance greater than a minor diameter and less than a major diameter of the flexible conduit.

9. The system of claim 8 , wherein the first guide hole and second guide hole are offset from one another along the central axis by the pitch distance of the flexible conduit.

10. The system of claim 8 , wherein first removable conduit retention prong and second removable conduit retention prong are formed from a non-metallic material.

11. The system of claim 8 , wherein the flexible conduit is flexible metallic conduit and the conduit adapter is injection molded plastic.

12. The system of claim 8 , further comprising:
a junction box configured to connect wires of one or more electrical devices to one or more electrical conductors contained in the flexible conduit.

13. The system of claim 12 , wherein the junction box and the conduit adapter are a single molded plastic part.

14. The system of claim 8 , wherein the first and second removable conduit retention prongs are connected by a top section as part of a retention clip;
further comprising a housing to house the top section of the retention clip.

15. The system of claim 8 , wherein the first removable conduit retention prong and second removable conduit retention prong are screws and the first guide hole and second guide hole are threaded.

16. A method for attaching a flexible conduit to a conduit adapter, the method comprising:
inserting the flexible conduit having a minor diameter corresponding to valleys and a pitch distance corresponding to a lateral distance between the valleys into an aperture of the conduit adapter, the aperture having a central axis;
inserting two prongs of a conduit retention clip into two guide holes located across the central axis from one another, the two guide holes separated by a distance greater than the minor diameter and less than the major diameter of the flexible conduit; and
holding the flexible conduit in the aperture by the two prongs being in the valleys of the flexible conduit.

17. The method of claim 16 , further comprising:
pinching, prior to inserting the two prongs, the two prongs together.

18. The method of claim 16 , further comprising:
connecting wires of one or more electrical devices in a junction box to one or more electrical conductors contained in the flexible conduit.

Assignees

• Siemens Industry Inc

Inventors

• Markus Robert
• Caliendo Guy P
• Waldmann Samuel

Classifications

• H02G15/103 Primary

  with devices for relieving electrical stress · CPC title

• H02G1/14

  for joining or terminating cables · CPC title

• H02G3/0468 Primary

  Corrugated · CPC title

• H02G15/007

  Devices for relieving mechanical stress · CPC title