Banjo fitting including seal rupturing structure and hydraulic hose coupling assembly including same

Patent metadata

Field	Value
Publication number	US-9783180-B2
Application number	US-201615017316-A
Country	US
Kind code	B2
Filing date	Feb 5, 2016
Priority date	Feb 5, 2016
Publication date	Oct 10, 2017
Grant date	Oct 10, 2017

Abstract

A banjo fitting is provided that may include an annular portion with an internal bore that extends along a first axis, and a hose attachment portion that extends radially from the annular portion, and has an internal fluid passageway extending along a second axis formed at an angle to the first axis. A seal rupturing structure may be positioned within the internal fluid passageway of the hose attachment portion.

First claim

The invention claimed is:

1. A banjo fitting for a hydraulic hose coupling assembly, comprising:
an annular portion with an internal bore that extends along a first axis;
a hose attachment portion, extending radially from the annular portion, and having an internal fluid passageway extending along a second axis formed at an angle to the first axis; and
a seal rupturing structure positioned within the internal fluid passageway of the hose attachment portion, wherein
the internal fluid passageway of the hose attachment portion has a bushing receiving portion and a hose receiving portion, and an interior diameter of the bushing receiving portion is larger than an interior diameter of the hose receiving portion, the hydraulic hose coupling assembly further comprising:
a threaded fitting including:
a longitudinal bore with a first end portion of a hydraulic hose disposed therein, and
a threaded portion configured to threadingly engage one of an internal threaded portion or an external threaded portion of the hose attachment portion, and

a deformable tubular bushing disposed around the first end portion of the hydraulic hose, the deformable tubular bushing being positioned between the bushing receiving portion of the internal fluid passageway and the threaded fitting such that the deformable tubular bushing decreases in axial length along the second axis and decreases in radial width, in response to engagement of the threaded fitting with one of the internal threaded portion or the external threaded portion of the hose attachment portion.

2. The banjo fitting of claim 1 , wherein
the seal rupturing structure is formed separately from the hose attachment portion, and coupled to the hose attachment portion.

3. The banjo fitting of claim 2 , wherein
the seal rupturing structure has a cylindrical shape to allow fluid flow through the seal rupturing structure.

4. The banjo fitting of claim 3 , wherein
the seal rupturing structure includes a needle portion.

5. The banjo fitting of claim 4 , wherein
the needle portion has a proximal end, and a beveled distal end opposite to the proximal end, and
the seal rupturing structure includes a flange portion provided on the proximal end of the needle portion.

6. The banjo fitting of claim 5 , wherein
the internal fluid passageway has a first diameter portion, a second diameter portion having a smaller diameter than the first diameter portion, and a step portion provided between the first and second diameter portions,
the seal rupturing structure includes an insertion portion formed to be inserted in the second diameter portion of the internal fluid passageway, and
the insertion portion extends from the proximal end of the needle portion.

7. The banjo fitting of claim 2 , wherein
the seal rupturing structure is formed of a different material than the hose attachment portion.

8. The banjo fitting of claim 1 , wherein
the seal rupturing structure is formed integrally with the hose attachment portion.

9. A hydraulic hose coupling assembly, comprising:
a banjo fitting including:
an annular portion with an internal bore that extends along a first axis;
a hose attachment portion, extending radially from the annular portion, and having an internal fluid passageway extending along a second axis formed at an angle to the first axis;
a seal rupturing structure positioned within the internal fluid passageway of the hose attachment portion;

a hydraulic hose having a first end portion with a first opening and a seal that seals the first opening, the hydraulic hose being configured such that the seal of the hydraulic hose is physically ruptured by the seal rupturing structure as the hydraulic hose is coupled to the hose attachment portion; and
a banjo bolt, installed within the internal bore of the annular portion, and configured with a hydraulic passageway, wherein
the internal fluid passageway of the hose attachment portion has a bushing receiving portion and a hose receiving portion, and an interior diameter of the bushing receiving portion is larger than an interior diameter of the hose receiving portion, the hydraulic hose coupling assembly further comprising:
a threaded fitting including:
a longitudinal bore with the first end portion of the hydraulic hose disposed therein, and
a threaded portion configured to threadingly engage one of an internal threaded portion or an external threaded portion of the hose attachment portion, and

a deformable tubular bushing disposed around the first end portion of the hydraulic hose, the deformable tubular bushing being positioned between the bushing receiving portion of the internal fluid passageway and the threaded fitting such that the deformable tubular bushing decreases in axial length along the second axis and decreases in radial width, in response to engagement of the threaded fitting with one of the internal threaded portion or the external threaded portion of the hose attachment portion.

10. The hydraulic hose coupling assembly of claim 9 , wherein:
the banjo bolt is coupled to a hydraulic brake caliper assembly.

11. The hydraulic hose coupling assembly of claim 9 , wherein
the hydraulic hose includes a tubular insert provided on the first end portion and within the first opening.

12. The hydraulic hose coupling assembly of claim 11 , wherein
the tubular insert has a tubular portion, an annular flange portion provided on an end of the tubular portion, and a longitudinal passageway within the tubular portion, and
the seal is attached to the annular flange portion.

13. The hydraulic hose coupling assembly of claim 9 , wherein
the seal rupturing structure is formed separately from the hose attachment portion, and coupled to the hose attachment portion.

14. The hydraulic hose coupling assembly of claim 13 , wherein
the seal rupturing structure has a cylindrical shape to allow fluid flow through the seal reputing structure.

15. The hydraulic hose coupling assembly of claim 14 , wherein
the seal rupturing structure includes a needle portion.

16. The hydraulic hose coupling assembly of claim 15 , wherein
the needle portion has a proximal end, and a beveled distal end opposite to the proximal end, and
the seal rupturing structure includes a flange portion provided on the proximal end of the needle portion.

17. The hydraulic hose coupling assembly of claim 16 , wherein
the internal fluid passageway has a first diameter portion, a second diameter portion having a smaller diameter than the first diameter portion, and a step portion provided between the first and second diameter portions,
the seal rupturing structure includes an insertion portion formed to be inserted in the second diameter portion of the internal fluid passageway, and
the insertion portion extends from the proximal end of the needle portion.

18. The hydraulic hose coupling assembly of claim 13 , wherein
the seal rupturing structure is formed of a different material than the hose attachment portion.

19. The hydraulic hose coupling assembly of claim 9 , wherein
the seal rupturing structure is formed integrally with the hose attachment portion.

Assignees

• Shimano Kk
• Shimano Kk

Inventors

• Watarai Etsuyoshi
• Kariyama Osamu
• Fujii Nobuyoshi
• Nakakura Masahiro

Classifications

• B62L1/10

  by the elements moving substantially parallel to the wheel axis · CPC title

• B60T17/043 Primary

  Brake line couplings, air hoses and stopcocks · CPC title

• B62L3/023 Primary

  acting on fluid pressure systems · CPC title

• B62L3/02

  for control by a hand lever (hand levers for control of cycles in general B62K23/06) · CPC title