Heat resistant fastening systems

Patent metadata

Field	Value
Publication number	US-9909610-B2
Application number	US-201514973148-A
Country	US
Kind code	B2
Filing date	Dec 17, 2015
Priority date	Dec 17, 2015
Publication date	Mar 6, 2018
Grant date	Mar 6, 2018

Abstract

A heat resistant washer for a heat resistant fastening system and a heat resistant fastening system is provided. The heat resistant washer includes a fire retardant material, and a housing that includes a base and a flange, with a throughbore defined through the base to receive a fastener. The housing defines a cavity adjacent to the throughbore and at least one guide. The fire retardant material is disposed within the cavity and the at least one guide directs the fire retardant material in an active state out of the cavity.

First claim

What is claimed is:

1. A heat resistant washer for a heat resistant fastening system, the heat resistant washer comprising:
a fire retardant material;
a housing that includes a first housing portion and a second housing portion, the first housing portion includes a base and a flange having a wall that extends outwardly from the base and a lip coupled to the wall, with a throughbore defined through the base to receive a fastener, the second housing portion coupled to the base and to the lip to define a cavity between the first housing portion and the second housing portion adjacent to the throughbore and the first housing portion includes at least one guide, the at least one guide is at least one bore defined through the wall, the fire retardant material disposed within the cavity and the at least one bore directs the fire retardant material in an active state out of the cavity; and
an alignment shield that defines a bore adapted to receive the shank of the fastener and the alignment shield includes at least one guide arm that cooperates with the at least one guide of the flange to direct the fire retardant material in the active state.

2. The heat resistant washer of claim 1 , wherein the second housing portion is coupled to a perimeter of the lip of the flange and extends about the first housing portion between the flange and the base to define the cavity.

3. A heat resistant fastening system, comprising:
a fastener having a head and a shank;
a heat resistant washer including a housing having a first housing portion that includes a base and a flange, with a bore defined through the base that receives the shank of the fastener, the housing defining a cavity that surrounds the head of the fastener and the flange of the first housing portion comprises a plurality of flanges that are movable between at least a first position and a second position, and the first position is different than the second position;
a fire retardant material disposed within the cavity so as to be positioned adjacent to the head of the fastener when the fastener is received within the cavity, and
wherein the housing includes at least one guide to direct the fire retardant material in an active state out of the cavity, at least one of the plurality of flanges is movable to a third position relative to the base to define the at least one guide, and the third position is different than the first position and the second position.

4. The heat resistant fastening system of claim 3 , wherein in the second position, the distal end of each of the plurality of flanges is spaced apart from and substantially encircles the bore of the base.

5. The heat resistant fastening system of claim 3 , wherein each of the plurality of flanges include a proximal end, a distal end and an enlarged portion between the proximal end and the distal end, and in the second position, the enlarged portion of each of the plurality of flanges defines the cavity.

6. The heat resistant fastening system of claim 5 , wherein in the second position, the distal end of each of the plurality of flanges contacts the head of the fastener.

7. The heat resistant fastening system of claim 3 , wherein in the third position, the at least one of the plurality of flanges inhibits the rotation of the heat resistant washer.

8. A heat resistant fastening system, comprising:
a fastener having a head and a shank;
a heat resistant washer including a first housing portion and a second housing portion, the first housing portion having a base and a flange, with a bore defined through the base that receives the shank of the fastener and the flange including at least one guide, the second housing portion coupled to the first housing portion to define a cavity, the cavity in communication with the at least one guide;
a fire retardant material disposed within the cavity and the at least one guide directs the fire retardant material in an active state out of the cavity about the head of the fastener; and
an alignment shield that defines a bore to receive the shank of the fastener and at least one guide arm that cooperates with the at least one guide of the flange to direct the fire retardant material in the active state.

Assignees

• Honeywell Int Inc

Inventors

• Mickelsen Justin C
• Duncan Aaron
• Mulloy Patrick S

Classifications

• F01D25/243

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

• F05D2260/31

  Retaining bolts or nuts · CPC title

• F16B43/001 Primary

  for sealing or insulation · CPC title

• F02C7/25

  Fire protection or prevention (in general A62) · CPC title