Bending restrictor

Patent metadata

Field	Value
Publication number	US-11268646-B2
Application number	US-201916397533-A
Country	US
Kind code	B2
Filing date	Apr 29, 2019
Priority date	May 3, 2018
Publication date	Mar 8, 2022
Grant date	Mar 8, 2022

Abstract

Bend restrictor comprising at least one pipe section and at least one clamp sectionwherein the pipe section comprises an outward facing flange at each end, the pipe section is split in the longitudinal direction into at least two parts,wherein the clamp section comprises an inward facing flange at each end and a pipe shaped middle section therebetween, wherein the clamp section is split in the longitudinal direction into at least two parts, wherein said parts are connectable through bolt connections, andwherein each inward facing flange is adapted to receive the outward facing flange of a pipe section.

First claim

The invention claimed is:

1. A bend restrictor comprising:
at least one pipe section, and at least one clamp section,
wherein the pipe section comprises an outward facing flange at each end, the pipe section is split in the longitudinal direction into at least two parts,
wherein the clamp section comprises an inward facing flange at each end and a pipe shaped middle section therebetween, wherein the clamp section is split in the longitudinal direction into at least two parts, wherein said parts are connectable through bolt connections, or through locking pin connections or through straps and
wherein each inward facing flange is adapted to receive the outward facing flange of a pipe section,
wherein the at least two parts of the clamp section comprises through holes adapted to receive a bolt, and
wherein the at least two parts of the clamp section comprises axial extending tongues comprising the through holes adapted to receive said bolt.

2. The bend restrictor according to claim 1 , wherein the outer diameter of the pipe shaped middle section of the clamp section is equivalent to the outer diameter of the pipe section between the outward facing flanges.

3. The bend restrictor according to claim 1 , wherein the clamp section comprises a radial extension at each end, wherein each radial extension comprises the inward facing flange.

4. The bend restrictor according to claim 1 , wherein the bend restrictor is made of metal and each section, preferably each part, comprises a sacrificial anode.

5. The bend restrictor according to claim 4 , wherein the sacrificial anode(s) of the clamp section is arranged on the pipe shaped middle section of the clamp section.

6. The bend restrictor according to claim 1 , wherein the bend restrictor is made of PUR or composite material.

7. The bend restrictor according to claim 1 , wherein the maximum outer diameter of the clamp section is unchanged by the axial extending tongues.

8. The bend restrictor according to claim 1 , wherein the clamp section has an axial length of 0.2 to 10 times the axial length of the pipe section.

9. The bend restrictor according to claim 1 , wherein the clamp section has an axial length of 0.2 to 1.5 times the axial length of the pipe section.

10. The bend restrictor according to claim 1 , wherein the clamp section has an axial length of 2 to 10 times the axial length of the pipe section.

11. The bend restrictor according to claim 3 , wherein the axial length of the pipe section is adapted to the axial length of the radial extensions of the clamp section, such that when the bend restrictor is in a bend position the radial extensions of two clamp sections connected to the same pipe section are brought in direct, force transferring contact.

12. The bend restrictor according to claim 1 , wherein the parts of the pipe section comprises through holes adapted to receive a bolt.

Assignees

• Nexans

Inventors

• Gronvold Eirik

Classifications

• F16L35/00

  Special arrangements used in connection with end fittings of hoses, e.g. safety or protecting devices · CPC title

• F16L1/20

  Accessories therefor, e.g. floats or weights · CPC title

• E21B17/017

  Bend restrictors for limiting stress on risers · CPC title

• F16L1/123

  Devices for the protection of pipes under water · CPC title

• F16L57/02 Primary

  against cracking or buckling · CPC title