US 12,222,017 B2
Air spring for cab of heavy truck with automatic height adjustment
Dae-Su Kim, Jeonju-si (KR)
Assigned to Hyundai Motor Company, Seoul (KR); and Kia Corporation, Seoul (KR)
Filed by Hyundai Motor Company, Seoul (KR); and Kia Corporation, Seoul (KR)
Filed on Jan. 6, 2022, as Appl. No. 17/570,047.
Claims priority of application No. 10-2021-0115520 (KR), filed on Aug. 31, 2021.
Prior Publication US 2023/0064527 A1, Mar. 2, 2023
Int. Cl. F16F 9/22 (2006.01); B62D 33/10 (2006.01); F16F 9/32 (2006.01); F16F 9/43 (2006.01)
CPC F16F 9/22 (2013.01) [B62D 33/10 (2013.01); F16F 9/3221 (2013.01); F16F 9/43 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An air spring apparatus for a cab of a truck with automatic height adjustment, which is provided between the cab and a frame of the truck and supports the cab with a pressure of air filling in the air spring apparatus, the air spring apparatus comprising:
a canister in which an internal space is formed;
a guide provided within the internal space of the canister;
a piston movably mounted in the internal space of the canister and configured to ascend and descend relative to the canister, wherein the piston includes an intake port and an exhaust port,
port opening units provided adjacent to the intake port and the exhaust port of the piston, respectively and configured to come into contact with the guide,
wherein when the cab ascends or descends, each of the port opening units is operated by the guide on which an inclined surface is formed in the canister to open either the intake port or the exhaust port.