US 12,442,426 B2
Spring
Fraser James Milne, Brechin (GB); and William Henry Lannagan, Aberdeen (GB)
Assigned to Balmoral Comtec Limited, Aberdeen (GB)
Appl. No. 17/792,200
Filed by Balmoral Comtec Limited, Aberdeen (GB)
PCT Filed Jan. 22, 2021, PCT No. PCT/GB2021/050146
§ 371(c)(1), (2) Date Jul. 12, 2022,
PCT Pub. No. WO2021/148802, PCT Pub. Date Jul. 29, 2021.
Claims priority of application No. 2000944 (GB), filed on Jan. 22, 2020.
Prior Publication US 2023/0045865 A1, Feb. 16, 2023
Int. Cl. F16F 1/376 (2006.01); F16F 1/377 (2006.01); F16L 3/10 (2006.01); E21B 17/01 (2006.01); F16L 1/24 (2006.01)
CPC F16F 1/376 (2013.01) [F16F 1/377 (2013.01); F16L 3/10 (2013.01); E21B 17/012 (2013.01); F16F 2224/0241 (2013.01); F16F 2224/025 (2013.01); F16F 2228/066 (2013.01); F16F 2230/02 (2013.01); F16F 2230/36 (2013.01); F16L 1/24 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A spring for a clamp suitable for attachment to a tubular member, the spring comprising a resilient body having first and second ends and an internal surface adapted to seat within a clamp member and an external surface adapted to contact an outer surface of the tubular member, the internal and external surfaces extending between the first and second ends and wherein a stiffness of the resilient body of the spring varies over a length of the body between the first and second ends, and the stiffness is higher towards the first and second ends of the resilient body than in a center of the body.