Conduit boot with bushing

Patent metadata

Field	Value
Publication number	US-10746338-B2
Application number	US-201816119320-A
Country	US
Kind code	B2
Filing date	Aug 31, 2018
Priority date	Aug 31, 2018
Publication date	Aug 18, 2020
Grant date	Aug 18, 2020

Abstract

An assembly for sealing an interface between a conduit and a case includes a boot and a bushing. The boot includes a tube and rubber flange. The rubber flange extends generally radially outward from the tube. The rubber flange includes an opening passing through a portion of the rubber flange. The bushing is disposed in the rubber flange and includes a tubular body, a channel, and a lip. The tubular body is disposed in the opening of the rubber flange. The channel extends through a center of the body. The lip is generally flat and extends radially outward from the tubular body. The lip is in contact and engages with the rubber flange so as to compress the rubber flange against the case.

First claim

The invention claimed is:

1. An assembly for sealing an interface between a conduit and a case in an aircraft, the assembly comprising:
a boot comprising:
a tube with first and second ends;
a rubber flange extending generally radially outward from the first end of the tube, wherein the rubber flange comprises an opening passing through a portion of the rubber flange, wherein the rubber flange comprises a first major face and a second major face; and
a slot disposed in a portion of the rubber flange;

a bushing disposed in the rubber flange, the bushing comprising:
a tubular body disposed in the opening of the rubber flange;
a channel extending through a center of the tubular body; and
a lip extending radially outward from the tubular body, wherein the lip is generally flat, wherein the lip is in contact and engages with the rubber flange so as to compress the rubber flange against the case; and

a fastener extending through the channel, through the opening, and into engagement with a portion of the case so as to apply a force to the bushing thereby compressing the rubber flange with the lip of the bushing, wherein the lip is seated in the slot.

2. The assembly of claim 1 , wherein the lip forms a retaining ring that extends along a circumference of the rubber flange of the boot.

3. The assembly of claim 1 , wherein the slot extends along a circumference of the rubber flange of the boot.

4. The assembly of claim 1 , wherein a thickness of the rubber flange is measured from the first major face of the flange to the second major face of the flange, and wherein a length of the body of the bushing is less than or greater than the thickness of the rubber flange of the boot.

5. The assembly of claim 1 , further comprising:
wherein the rubber flange includes first and second ring shaped slots connected to and extending around a portion of the opening; and
wherein the bushing includes first and second lips that are axially spaced from each other, wherein the first and second lips engage with the first and second slots, respectively.

6. The assembly of claim 1 , further comprising:
a retaining ring in contact with the second major face of the rubber flange, wherein the retaining ring comprises a hole in alignment with the opening of the rubber flange and with the channel of the bushing; and
a fastener extending through the hole, through the channel, through the opening, and into engagement with a portion of the case so as to apply a force to the retaining ring thereby compressing the rubber flange with the retaining ring.

7. The assembly of claim 1 , wherein an outer diameter of the lip of the bushing is approximately twice the size of an outer diameter of the body of the bushing.

8. A method of attaching a boot to a case, the method comprising:
passing a fastener through a portion of a boot assembly, wherein the boot assembly comprises:
the boot comprising:
a tube with first and second ends; and
a rubber flange extending generally radially outward from the first end of the tube, wherein the rubber flange comprises:
an opening passing through a portion of the rubber flange, wherein the fastener passes through the opening; and
a ring-shaped slot connected to and extending around a portion of the opening, wherein a thickness of the rubber flange is measured from a top portion of the rubber flange to a bottom portion of the rubber flange; and

a bushing disposed in the rubber flange, the bushing comprising:
a tubular body disposed in the opening of the rubber flange;
a channel extending through a center of the tubular body, wherein the fastener is passed through the channel of the bushing; and
a lip extending radially outward from the tubular body, wherein the lip is generally flat, wherein the lip is in contact with a portion of the rubber flange of the boot;

attachably engaging the fastener with the case;
applying a compressive force to the rubber flange;
pressing, with the lip of the bushing, the rubber flange of the boot against the case; and
forming a sealing interface between a first major face of the rubber flange and a surface of the case.

9. The method of claim 8 , further comprising:
positioning a retaining ring between a first portion of the fastener and the rubber flange; and
wherein applying a compressive force to the rubber flange comprises:
bringing the first portion of the fastener into contact with the retaining ring;
pressing the retaining ring into the rubber flange; and
compressing the rubber flange, with the retaining ring, into the surface of the case.

10. The method of claim 9 , further comprising stopping the compression of the rubber flange with the body of the bushing by contacting the body of the bushing with a portion of the retaining ring.

11. The method of claim 9 , further comprising stopping the compression of the rubber flange with the body of the bushing by contacting the body of the bushing with a portion of the case.

12. The method of claim 8 , wherein the lip of the bushing is positioned between a first portion of the fastener and the rubber flange; and further comprising stopping the compression of the rubber flange with the body of the bushing by contacting the body of the bushing with a portion of the case.

13. The method of claim 8 , further comprising:
a slot disposed in a portion of the rubber flange, wherein the slot extends along a circumference of the rubber flange of the boot, wherein the lip is seated in the slot, wherein the lip forms a retaining ring that extends along the circumference of the rubber flange of the boot; and
applying, with the fastener, a force to the bushing thereby compressing the rubber flange with the lip.

14. An assembly for sealing an interface between a conduit and a case in an aircraft, the assembly comprising:
a boot comprising:
a tube with first and second ends, wherein the conduit passes through a portion of the tube, wherein a fluidic seal is formed between the conduit and the tube of the boot; and
a rubber flange extending generally radially outward from the first end of the tube, wherein the rubber flange comprises an opening passing through a portion of the rubber flange, wherein the rubber flange comprises a first major face and a second major face;
a slot disposed in a portion of the rubber flange; and

a bushing disposed in the rubber flange, the bushing comprising:
a tubular body disposed in the opening of the rubber flange;
a channel extending through a center of the tubular body; and
a lip extending radially outward from the tubular body, wherein the lip is generally flat, wherein the lip is seated in the slot of the rubber flange, wherein the lip is in contact and engages with the rubber flange so as to compress the rubber flange against the case;

a retaining ring in contact with the second major face of the rubber flange, wherein the retaining ring comprises a hole in alignment with the opening of the rubber flange and with the channel of the bushing; and
a fastener extending through the hole, through the channel, through the opening, and into engagement with the case, so that the fastener compresses the retaining ring against a portion of the rubber flange thereby compressing the rubber flange into the case, wherein an interface between the case and the first major face of the rubber flange forms a fluidic seal.

15. The assembly of claim 14 , wherein the fastener applies a compressive force to the bushing thereby compressing, with the lip of the bushing, the rubber flange into the case.

16. The assembly of claim 14 , wherein a thickness of the rubber fla

Assignees

• United Technologies Corp

Inventors

• Waitkus Christopher
• Ruckey Curtis J

Classifications

• F16L41/086

  fixed with screws · CPC title

• F16L5/10

  by using sealing rings or sleeves only · CPC title

• F16L41/18 Primary

  the branch pipe being movable · CPC title

• F16L5/025

  the pipe being movable (F16L5/10 takes precedence) · CPC title

• F01D25/243

  Flange connections; Bolting arrangements (F01D25/265 takes precedence) · CPC title