Patent ID: 9371142
Filing Date: 2016-06-21
CPC Classification: B64D,H05K,Y10T

Claim Text:
1. A method of retaining a portable electronic unit within an avionics equipment mounting tray that has a hold-down assembly including a shaft coupled to the avionics equipment mounting tray and a locking collar slidably disposed on the shaft to hold the electronic unit in the tray, the method further comprising: sliding the locking collar along the shaft to interact with a part of the portable electronic unit; rotating a threaded rotatable actuator knob that is threadably engaged on threads of the shaft to advance the actuator knob along the shaft and into engagement with the locking collar to secure the collar and apply a locking force on the portable electronic unit; simultaneously with rotating the actuator knob, sliding a non-rotatable ratchet plate along the shaft together with the rotatable actuator knob and rotating and ratcheting the rotatable actuator knob with respect to the non-rotatable ratchet plate to secure the rotation of the actuator knob relative to the non-rotatable ratchet plate and hinder undesired rotation of the actuator knob and for holding the electronic unit in place.