US 12,404,881 B2
Safety valve
Heinz-Hermann Meyer, Seelze (DE); and Martin Pilcher, Hannover (DE)
Assigned to Aventics GmbH, Laatzen (DE)
Appl. No. 18/690,859
Filed by AVENTICS GmbH, Laatzen (DE)
PCT Filed Sep. 12, 2022, PCT No. PCT/DE2022/100673
§ 371(c)(1), (2) Date Mar. 11, 2024,
PCT Pub. No. WO2023/041113, PCT Pub. Date Mar. 23, 2023.
Claims priority of application No. 10 2021 123 936.2 (DE), filed on Sep. 15, 2021.
Prior Publication US 2024/0401615 A1, Dec. 5, 2024
Int. Cl. F15B 11/068 (2006.01); F16K 31/42 (2006.01); F15B 13/04 (2006.01); F15B 13/043 (2006.01); F15B 20/00 (2006.01)
CPC F15B 11/068 (2013.01) [F16K 31/423 (2013.01); F15B 13/0405 (2013.01); F15B 13/0431 (2013.01); F15B 20/00 (2013.01); F15B 2211/851 (2013.01); F15B 2211/853 (2013.01); F15B 2211/8755 (2013.01); F15B 2211/8757 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A safety valve for connecting high pressures and flows, comprising:
a fluid inlet;
a fluid outlet;
a first main stage; and
a second main stage,
wherein the first main stage, in a rest position, is configured to connect the fluid outlet to a first relief outlet and, in a switched position, the first main stage is configured to connect the fluid inlet to a fluid connection for the second main stage,
wherein the second main stage, in a rest position, is configured to connect the fluid outlet to a second relief outlet and, in a switched position, the second main stage is configured to connect the fluid connection to the fluid outlet;
wherein the first main stage and the second main stage are each configured as a seat valve having a corresponding multipart linear movable tappet,
wherein the linear moveable tappet of the first main stage includes a first tappet part and a second tappet part,
wherein when the first main stage transitions from the rest position to the switched position, the first tappet part of the first main stage is actuated counter to a spring load, and, in a first movement portion of the first main stage, the first tappet part of the first main stage initially sealingly abuts the second tappet part of the first main stage, such that a relief passage to the first relief outlet is closed, and in response to movement of the second tappet part of the first main stage in a second movement portion of the first main stage or a further tappet part of the first main stage in a further movement portion, a pressurization passage between the fluid inlet and the fluid connection for the second main stage is opened counter to a spring load, and
wherein the linear movable tappet of the second main stage includes a first tappet part and a second tappet part,
wherein and when the second main stage transitions from the rest position to the switched position, the first tappet part of the second main stage that is actuated counter to a spring load, in a first movement portion of the second main stage, the first tappet part of the second main stage initially sealingly abuts the second tappet part of the second main stage, such that a relief passage to the second relief outlet is closed, and in response to movement of the second tappet part of the second main stage in a second movement portion of the second main stage or a further tappet part in a further movement portion, a pressurization passage between the fluid connection and the fluid outlet is opened counter to a spring load.