US 12,345,218 B2
Pumping apparatus
David Robertson, Galashiels (GB); and Ian Hanley, Galashiels (GB)
Assigned to Thistle Rocketry Ltd, Galashiels (GB)
Appl. No. 18/284,639
Filed by Thistle Rocketry Ltd, Galashiels (GB)
PCT Filed Mar. 18, 2022, PCT No. PCT/GB2022/050687
§ 371(c)(1), (2) Date Sep. 28, 2023,
PCT Pub. No. WO2022/208048, PCT Pub. Date Oct. 6, 2022.
Claims priority of application No. 2104755 (GB), filed on Apr. 1, 2021.
Prior Publication US 2024/0426261 A1, Dec. 26, 2024
Int. Cl. F02K 9/46 (2006.01); F02K 9/50 (2006.01); F02K 9/58 (2006.01)
CPC F02K 9/46 (2013.01) [F02K 9/50 (2013.01); F02K 9/58 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A pumping apparatus comprising:
a pump having at least three chambers for sequentially supplying fuel or propellant to a combustion chamber;
wherein each chamber is fluidly connected to another chamber among the at least three chambers, and wherein for each chamber venting of the chamber at least partially pressurises the other chamber.