# US 2019/0170252 A1 · Sealing gasket for railway vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0170252 A1 - Document ID: US20190170252A1 - Status: Published application - Kind: A1 - Application number: 16/208,852 - Filed: 2018-12-04 - Published: 2019-06-06 - Earliest claimed: 2017-12-06 - Assignees: Saint-Gobain Performance Plastics France - Applicants: Saint-Gobain Performance Plastics France - Inventors: Didier ROBERT; Julien GUIDICI - Web page: https://patentgrep.com/patent/US20190170252A1 ## CPC - F16J 15/027: {and with a hollow profile} - B61D 17/00: Construction details of vehicle bodies (for tank wagons B61D5/00; for hopper cars B61D7/00; body details specially adapted for tipping wagons B61D9/06; for mine cars B61D11/00) - B61D 17/12: Roofs (movable or foldable roofs, covers or tarpaulins B61D39/00) - B61D 27/00: Heating, cooling, ventilating, or air-conditioning {(heating, cooling or ventilating devices for vehicles in general B60H1/00; devices for moistening air in vehicles B60H3/02; devices for filtering air in vehicles B60H3/06)} - F16J 3/042: {Fastening details} - F16J 15/52: by means of sealing bellows or diaphragms (connection of valves to inflatable elastic bodies B60C29/00) - F16J: PISTONS {(specially adapted for dampers F16F9/32)}; CYLINDERS; SEALINGS - B61D: BODY DETAILS OR KINDS OF RAILWAY VEHICLES (vehicles in general B60; adaptation of vehicles to special systems B61B; underframes B61F) ## Abstract A sealing gasket for producing sealing between a body of a railway vehicle (10) and an air conditioning unit (30) topping said body, may include a lower gasket part (60) provided with a receiving slot (62) suitable for receiving a rib of the body and an upper gasket part (70) opposite the lower gasket part in a main direction (Y1), and suitable for sealably bearing against the air conditioning unit (30). According to the invention, the hardness of the lower gasket part (60) may be greater than that of the upper gasket part (70). ## Claims ### Claim 1 A sealing gasket for producing sealing between a body of a railway vehicle and an air conditioning unit topping said body, said gasket comprising a lower gasket part provided with a receiving slot suitable for receiving the rib of the body and an upper gasket part opposite the lower gasket part in a main direction (Y1), and suitable for sealably bearing against the air conditioning unit, the gasket being characterized in that the hardness of the lower gasket part is greater than that of the upper gasket part. ### Claim 2 (depends on 1) The gasket according to claim 1, wherein the upper gasket part has a shore A hardness comprised between 25 and 65. ### Claim 3 (depends on 1) The gasket according to claim 1, wherein the lower gasket part has a shore A hardness comprised between 65 and 95. ### Claim 4 (depends on 1) The gasket according to claim 1, wherein a difference in shore A hardness between the lower and upper gasket parts is at least 10. ### Claim 5 (depends on 1) The gasket according to claim 1, wherein the lower gasket part is a silicone. ### Claim 6 (depends on 1) The gasket according to claim 1, wherein the upper gasket part is a silicone. ### Claim 7 (depends on 1) The gasket according to claim 1, wherein the lower and the upper gasket parts are silicones. ### Claim 8 (depends on 1) The gasket according to claim 1, wherein the gasket is equipped with retaining means protruding inside the receiving slot. ### Claim 9 (depends on 8) The gasket according to claim 8, wherein the retaining means comprise at least one tongue or tooth oriented toward the bottom of the receiving slot. ### Claim 10 (depends on 1) The gasket according to claim 1, wherein the upper gasket part comprises at least one sealing lip at its end intended to come into contact with the air conditioning unit. ### Claim 11 (depends on 1) The gasket according to claim 1, wherein the upper gasket part comprises a cellular structure suitable for deforming elastically in the main direction (Y1). ### Claim 12 (depends on 11) The gasket according to claim 11, wherein the elastic cellular structure comprises at least one cell forming a bellows, defining a closed cavity delimited by V-shaped or U-shaped side walls. ### Claim 13 (depends on 11) The gasket according to claim 11, wherein the cellular structure comprises at least two cells juxtaposed in the main direction (Y1). ### Claim 14 A railway vehicle, with an engine or towed, comprising a body and at least one air conditioning unit topping said body in a vertical direction (Z), the body comprising at least one continuous rib situated across from the air conditioning unit in the vertical direction (Z), and the railway vehicle further comprising at least one sealing gasket between said body and said air conditioning unit with its main direction (Z1) parallel to the vertical direction (Z), wherein the sealing gasket comprises a lower gasket part provided with a receiving slot suitable for receiving the rib of the body and an upper gasket part opposite the lower gasket part in a main direction (Y1), and suitable for sealably bearing against the air conditioning unit, the gasket being characterized in that the hardness of the lower gasket part is greater than that of the upper gasket part. ### Claim 15 (depends on 14) The railway vehicle according to claim 14, wherein the upper gasket part has a shore A hardness comprised between 25 and 65. ### Claim 16 (depends on 14) The railway vehicle according to claim 14, wherein the lower gasket part has a shore A hardness comprised between 65 and 95. ### Claim 17 (depends on 14) The railway vehicle according to claim 14, wherein a difference in shore A hardness between the lower and upper gasket parts is at least 10. ### Claim 18 (depends on 14) The railway vehicle according to claim 14, wherein the lower gasket part is a silicone. ### Claim 19 (depends on 14) The railway vehicle according to claim 14, wherein the upper gasket part is a silicone. ### Claim 20 (depends on 14) The railway vehicle according to claim 14, wherein the lower and the upper gasket parts are silicones.