US 11,988,240 B2
Locking tab-washer
David Pyra, Longueuil (CA); Guy Lefebvre, St-Bruno-de-Montarville (CA); and Gerard Theriault, Longueuil (CA)
Assigned to PRATT & WHITNEY CANADA CORP., Qc (CA)
Filed by PRATT & WHITNEY CANADA CORP., Longueuil (CA)
Filed on Oct. 29, 2021, as Appl. No. 17/452,883.
Prior Publication US 2023/0139607 A1, May 4, 2023
Int. Cl. F02C 7/20 (2006.01); F16B 39/10 (2006.01)
CPC F16B 39/108 (2013.01) [F02C 7/20 (2013.01); F05D 2220/32 (2013.01); F05D 2260/31 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A locking tab washer for rotatably locking a bolt fastened to a component in an aircraft engine, the bolt having a bolt head with repeated flat surfaces, the locking tab washer comprising:
an opening extending from a front surface of the locking tab washer to a rear surface of the locking tab washer, with an axis defined through a center of the opening;
at least four locking tabs positioned about the opening and circumferentially spaced apart from one another at integer multiples of a common angle relative to the center of the opening, the at least four locking tabs bendable towards the opening in a first direction relative to the axis to rotatably lock the bolt; and
a retaining feature positioned about the opening and operable to rotatably retain the locking tab washer to the component;
wherein the retaining feature includes a pair of anti-rotation tabs, each anti-rotation tab having a first portion extending radially outwardly from the opening and a second portion extending in a second direction relative to the axis opposite the first direction, the anti-rotation tabs operable to engage scalloped edges of a radially-outward surface of the component.