# US 2024/0200728 A1 · Remote triggering device for a pressure vessel, and assembly with a compressed gas reservoir and such a remote triggering device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2024/0200728 A1 - Document ID: US20240200728A1 - Status: Published application - Kind: A1 - Application number: 18/538,461 - Filed: 2023-12-13 - Published: 2024-06-20 - Earliest claimed: 2022-12-14 - Assignees: Faurecia Hydrogen Solutions Germany GmbH - Applicants: Faurecia Hydrogen Solutions Germany GmbH - Inventors: Richard TROTT - Web page: https://patentgrep.com/patent/US20240200728A1 ## CPC - F17C 13/04: Arrangement or mounting of valves (valves per se F16K {; snap-coupling of nipples F16L37/00}) - F16K 31/025: {actuated by thermo-electric means} - F17C: VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES (storing fluids in natural or artificial cavities or chambers in the earth B65G5/00; construction or assembling of bulk storage containers employing civil-engineering techniques E04H7/00; variable-capacity gas-holders F17B; liquefaction or refrigeration machines, plants, or systems F25) - F16K: VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING {(devices for emptying and evacuating the excess liquid in valves or conduits F16L55/07)} ## Abstract A remote triggering device comprises a housing, a piezoelectric element, a piston accommodated in the housing, and a prestressing device. The piston is adjustable between a starting position in which the prestressing device is held in a pretensioned state and an actuating position in which the piston is applied by the prestressing device against the piezoelectric element. The piston is held in the starting position by a temperature-sensitive locking mechanism. An assembly comprises a compressed gas reservoir, an electrically-actuated pressure relief valve that is attached to the compressed gas reservoir, and the remote triggering device. ## Claims ### Claim 1 A remote triggering device comprising: a housing; a piezoelectric element; a piston which is accommodated in the housing; and a prestressing device, wherein the piston is adjustable between a starting position in which the prestressing device is held in a pretensioned state and an actuating position in which the piston is applied by the prestressing device against the piezoelectric element, and wherein the piston is held in the starting position by a temperature-sensitive locking mechanism. ### Claim 2 (depends on 1) The remote triggering device according to claim 1, wherein the temperature-sensitive locking mechanism is formed by a press fit within the housing, wherein the press fit is dimensioned such that a holding force generated by the press fit becomes smaller, when a limit temperature is exceeded, than a force generated by the prestressing device. ### Claim 3 (depends on 2) The remote triggering device according to claim 2, wherein a coefficient of thermal expansion of the housing and of the piston differ from one another by less than 10%. ### Claim 4 (depends on 2) The remote triggering device according to claim 2, wherein a coefficient of thermal expansion of the housing is greater than a coefficient of thermal expansion of the piston. ### Claim 5 (depends on 2) The remote triggering device according to claim 2, wherein a receiving space has a clamping portion with a first diameter and a release portion with a second diameter which is greater than the first diameter, and wherein the piezoelectric element is located on a side of the release portion, and the piston is located, in the starting position, in the clamping portion in a vicinity of a transition to the release portion. ### Claim 6 (depends on 1) The remote triggering device according to claim 1, wherein the temperature-sensitive locking mechanism is formed by a press fit between the piston and a holding element which is held in a recess in the piston with the press fit. ### Claim 7 (depends on 1) The remote triggering device according to claim 1, wherein the temperature-sensitive locking mechanism is formed by a tensile element that acts between the housing and the piston, and wherein a coefficient of thermal expansion of the housing is greater than a coefficient of thermal expansion of the tensile element. ### Claim 8 (depends on 7) The remote triggering device according to claim 7, wherein the tensile element is a rod having a predetermined breaking point. ### Claim 9 (depends on 1) The remote triggering device according to claim 1, wherein the temperature-sensitive locking mechanism is formed by a holding element which surrounds the piston and has a coefficient of thermal expansion which is smaller than a coefficient of thermal expansion of the piston, and wherein the holding element rests against a contact shoulder in the housing. ### Claim 10 (depends on 9) The remote triggering device according to claim 9, wherein the holding element is a closed ring which has a predetermined breaking point. ### Claim 11 (depends on 1) The remote triggering device according to claim 1, wherein the piezoelectric element is arranged on a side of the piston facing away from the prestressing device. ### Claim 12 (depends on 1) The remote triggering device according to claim 1, wherein the piezoelectric element is accommodated in the housing. ### Claim 13 (depends on 1) The remote triggering device according to claim 1, wherein the housing has a cylindrical receiving space in which the prestressing device and the piston are arranged. ### Claim 14 (depends on 13) The remote triggering device according to claim 13, wherein the cylindrical receiving space has a circular cross-section. ### Claim 15 (depends on 1) The remote triggering device according to claim 1, wherein a heat-sensitive adhesive is provided in a region between the piston and the housing. ### Claim 16 (depends on 1) An assembly comprising: a compressed gas reservoir; an electrically-actuated pressure relief valve which is attached to the compressed gas reservoir; and a remote triggering device according to claim 1. ### Claim 17 (depends on 3) The remote triggering device according to claim 3, wherein the housing and the piston are made of the same material. ### Claim 18 (depends on 4) The remote triggering device according to claim 4, wherein the coefficient of thermal expansion of the housing is greater than the coefficient of thermal expansion of the piston, by more than 10%.