Fastener-removal method and assembly including a fastener-removal member integrally constructed with a washer member

Patent metadata

Field	Value
Publication number	US-9850937-B2
Application number	US-201414325817-A
Country	US
Kind code	B2
Filing date	Jul 8, 2014
Priority date	Jul 8, 2014
Publication date	Dec 26, 2017
Grant date	Dec 26, 2017

Abstract

Fastener-removal method and assembly including a washer member ( 22 ) integral with a fastener-removal member ( 26 ) are provided. A fastener ( 16 ) may be disposed in a through hole ( 24 ) in the washer member. The fastener-removal member is arranged to receive a mechanical force effective to remove the fastener. Embodiments of the disclosed assembly are effective for quick removal of relatively high-strength fasteners, as may be used in combustion turbine engines, without having to directly apply torque to structures of the fastener, such as the head of a fastener, and thus reducing the possibility of damage to the fastener during servicing operations of the turbine engine involving fastener removal.

First claim

The invention claimed is:

1. A combustion turbine engine component comprising:
a plurality of assemblies arranged for fastening the combustion turbine engine component to a casing of a combustion turbine engine, each assembly comprising:
a body comprising a washer member including a through hole; and
a fastener disposed in the through hole of the washer member;
wherein the body further comprises a fastener-removal member integral with the washer member, the fastener-removal member extending a predefined distance away from the washer member along a longitudinal axis of the body, the fastener-removal member arranged to receive a mechanical force effective to remove the fastener,
wherein the washer member comprises a surface including means for frictionally engaging a corresponding surface of the head of the fastener to remove the combustion turbine engine component from the casing of the combustion turbine engine.

2. The combustion turbine engine component of claim 1 , wherein the fastener comprises a head, and further wherein the fastener-removal member is arranged to directly receive the mechanical force without contacting the head of the fastener.

3. The combustion turbine engine component of claim 2 , wherein the means for frictionally engaging the corresponding surface of the head of the fastener comprises a plurality of serrations or grooves arranged to engage the corresponding surface of the head of the fastener.

4. The combustion turbine engine component of claim 1 , wherein the body comprises a planar body.

5. The combustion turbine engine component of claim 1 , wherein the fastener-removal member comprises at least an opening configured to receive a lever arm to apply the mechanical force.

6. The combustion turbine engine component of claim 1 , wherein the fastener-removal member comprises a lateral portion arranged to receive the mechanical force.

7. The combustion turbine engine component of claim 6 , wherein the mechanical force comprises a shock force.

8. The combustion turbine engine component of claim 7 , further comprising a bumper arranged on the lateral portion of the fastener-removal member to receive the shock force.

9. The combustion turbine engine component of claim 1 comprising a top hat of a combustor.

10. The combustion turbine engine component of claim 1 , wherein the fastener is selected from the group consisting of a bolt, a stud and a threaded fastener.

11. The combustion turbine engine component of claim 1 , wherein the assembly is structured to receive a fastening torque of at least approximately 350 ft-lbs.

12. A method for fastening a combustion turbine engine component to a casing of a combustion turbine engine, the method comprising:
arranging a plurality of assemblies for fastening the combustion turbine engine component to the casing of the combustion turbine engine;
integrally constructing in each assembly a washer member and a fastener-removal member, the washer member including a through hole to receive a fastener;
configuring the fastener-removal member to extend a predefined distance away from the washer member along a longitudinal axis of the body;
constructing on a surface of the washer member means for frictionally engaging a corresponding surface of the head of the fastener to remove the combustion turbine engine component from the casing of the combustion turbine engine; and
utilizing the fastener-removal member to receive a mechanical force effective to remove the fastener without contacting the head of the fastener.

13. The method of claim 12 , wherein the constructing comprises constructing on the surface of the washer member a plurality of serrations or grooves arranged to engage the corresponding surface of the head of the fastener, the plurality of serrations or grooves constituting the means for frictionally engaging the corresponding surface of the head of the fastener.

14. The method of claim 12 , wherein the utilizing of the fastener-removal member to receive the mechanical force comprises at least one of the following:
receiving a lever arm in an opening in the fastener-removal member to apply the mechanical force; and/or
applying the mechanical force to a lateral portion of the fastener-removal member by way of shock forces.

Assignees

• Siemens Energy Inc

Inventors

• Hatcher Jr Clifford
• Williams James P

Classifications

• F16B39/22

  in which the locking takes place during screwing down or tightening (F16B39/01 takes precedence) · CPC title

• F02C7/32

  Arrangement, mounting, or driving, of auxiliaries · CPC title

• F23R3/60

  Support structures; Attaching or mounting means · CPC title

• F16B43/00

  Washers or equivalent devices; Other devices for supporting bolt-heads or nuts (circlips F16B21/18; {for indicating tensile load F16B31/02; forming a whole with the bolt or nut F16B33/00; locking bolts or nuts by means of a fixed plate or ring, or washer-like resilient plates F16B39/10, F16B39/24}) · CPC title

• F16B43/003 Primary

  with a special hole shape in order to allow a quick mounting or dismounting of the washer, e.g. with a keyhole slot (F16B43/005 takes precedence) · CPC title