US 12,187,417 B2
Retractable landing gear system with magnetic uplocks
Randy Lee, Oshawa (CA); Zoran Pasic, Etobicoke (CA); and Michael Saccoccia, Seagrave (CA)
Assigned to SAFRAN LANDING SYSTEMS CANADA INC., Ajax (CA)
Filed by SAFRAN LANDING SYSTEMS CANADA INC., Ajax (CA)
Filed on May 1, 2023, as Appl. No. 18/310,382.
Prior Publication US 2024/0367780 A1, Nov. 7, 2024
Int. Cl. B64C 25/26 (2006.01); B64C 25/24 (2006.01)
CPC B64C 25/26 (2013.01) [B64C 25/24 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A landing gear system for a vehicle, comprising:
a landing gear assembly coupled to a body of the vehicle and configured for reciprocating motion between a retracted position and an extended position; and
a fail-secure uplock assembly reciprocal between a locked state and an unlocked state, the uplock assembly comprising:
a first electromagnet fixedly positioned relative to the body of the vehicle, the first electromagnet including a first solenoid configured to generate a first electromagnetic field with a reversible polarity and a first permanent magnet; and
a second electromagnet fixedly positioned relative to a landing gear assembly component, the second electromagnet including a second solenoid configured to generate a second electromagnetic field with a reversible polarity and a second permanent magnet,
wherein the first electromagnet is proximate to the second electromagnet when the landing gear assembly is in the retracted position, the first permanent magnet being attracted to the second permanent magnet, the first solenoid being attracted to the second solenoid when the uplock assembly is in the locked state, the first solenoid being repelled by the second solenoid when the uplock assembly is in the unlocked state.