Locking fastener

Patent metadata

Field	Value
Publication number	US-9267533-B2
Application number	US-52196108-A
Country	US
Kind code	B2
Filing date	Dec 18, 2008
Priority date	Dec 18, 2007
Publication date	Feb 23, 2016
Grant date	Feb 23, 2016

Abstract

The present disclosure provides a multiple use threaded fastener having a plurality of redundant locking features. The fastener includes a threaded hollow lock bolt having a tapered internal wall constructed to threadingly engage a threaded aperture in a housing. A threaded lock stud having a tapered external wall is constructed to fit at least partially within the hollow lock bolt and threadingly engage the threaded aperture of the housing and engage the tapered wall of the hollow lock bolt.

First claim

What is claimed is:

1. A locking fastener comprising: a hollow lock bolt having a drive head formed proximate a first end and external threads formed proximate a second end, the hollow lock bolt further having a relatively smooth internal wall with an angled taper extending along at least a portion thereof; and
a lock stud constructed to engage the hollow lock bolt, the lock stud having a drive head proximate a first end and external threads formed proximate a second end, the lock stud further having a relatively smooth external wall with an angled taper formed along a portion thereof,
wherein the locking fastener is configured for clamping a first component between at least a portion of the hollow lock bolt and a second component; and
wherein the lock stud and hollow lock bolt are configured so that the drive head of the lock stud extends past an interface between the first component and the second component in an installed condition of the locking fastener; and
wherein the taper angle of the hollow lock bolt and the lock stud are different from one another.

2. A method of fastening comprising:
engaging a threaded lock stud with a threaded aperture of a housing by rotating the lock stud in a first direction wherein the rotating of the lock stud is terminated before a drive head of the threaded lock stud completely enters the threaded aperture;
sliding a threaded hollow lock bolt over the lock stud;
threadingly engaging the hollow lock bolt with the threaded aperture of the housing;
torquing the hollow lock bolt to a predetermined level without engaging the lock stud; and
torquing the lock stud to a predetermined level by rotating the lock stud in a second direction opposite the first direction and engaging a tapered wall of the lock stud with a tapered wall of the hollow lock bolt.

3. The method of claim 2 further comprising:
clamping a component between the hollow lock bolt and the housing.

4. A locking fastener comprising:
a hollow lock bolt having a drive head disposed proximate a first end and external threads disposed proximate a second end, the hollow lock bolt further having a an internal wall with a taper of approximately 4degrees extending along at least a portion thereof; and
a lock stud having a drive head disposed proximate a first end and external threads disposed proximate a second end, the lock stud further having a external wall with a taper of approximately 4degrees extending along a portion thereof, wherein the drive head of the lock stud is configured to enter completely into the hollow lock bolt,
wherein the locking fastener is configured for clamping a first component between at least a portion of the hollow lock bolt and a second component when the threads of the hollow lock bolt and the threads of the lock stud engage corresponding mating threads in the second component.

Assignees

• Rice Edward Claude
• Rolls Royce Corp

Inventors

• Rice Edward Claude

Classifications

• F16B35/045

  for retention or rotation by a tool (specially shaped heads of bolts or screws for rotation by a tool F16B23/00) · CPC title

• F16B39/36 Primary

  with conical locking parts, which may be split, including use of separate rings co-operating therewith · CPC title