US 12,492,753 B2
Valve seat unit
Takashige Inaba, Tokyo (JP)
Assigned to MAYEKAWA MFG. CO., LTD., Tokyo (JP)
Appl. No. 18/716,321
Filed by MAYEKAWA MFG. CO., LTD., Tokyo (JP)
PCT Filed Dec. 12, 2022, PCT No. PCT/JP2022/045612
§ 371(c)(1), (2) Date Jun. 4, 2024,
PCT Pub. No. WO2023/120269, PCT Pub. Date Jun. 29, 2023.
Claims priority of application No. 2021-206296 (JP), filed on Dec. 20, 2021.
Prior Publication US 2025/0035216 A1, Jan. 30, 2025
Int. Cl. F16K 1/42 (2006.01); F04B 39/10 (2006.01)
CPC F16K 1/427 (2013.01) [F04B 39/1086 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A valve seat unit, comprising:
a valve seat including a seat surface for a valve to sit on and a seat back surface located opposite to the seat surface;
a base configured separately from the valve seat and supporting the valve seat; and
a bolt securing the valve seat to the base,
wherein a head portion of the bolt is located between the seat surface and the seat back surface,
wherein the base includes a support surface in contact with the seat back surface and supporting the valve seat,
wherein the valve seat formed in a ring shape further includes a chamfered portion connected to one radial end of the seat back surface,
wherein the base further includes a base corner portion facing the chamfered portion, and
wherein the valve seat unit further comprises an O-ring disposed between the base corner portion and the chamfered portion.