公开(公告)号：US11951547B2

公开(公告)日：2024-04-09

申请号：US16627682

申请日：2018-10-23

Applicant: TPR CO., LTD.

Inventor： Yoshio Bando ,  Fumiya Ito ,  Kenichi Harashina

IPC: B22F5/00 ,  B22F3/16 ,  C22C38/16 ,  F01L3/08

CPC classification number: B22F5/008 ,  B22F3/16 ,  C22C38/16 ,  F01L3/08 ,  B22F2301/10 ,  B22F2301/35 ,  F01L2301/00 ,  F01L2303/00 ,  B22F2998/10 ,  B22F1/17 ,  B22F1/09 ,  B22F3/02 ,  B22F3/10

Abstract: Provided are a valve guide made of an iron-based sintered alloy excellent in wear resistance and thermal conductivity, and a method of producing the same. Specifically, provided are a method of producing a valve guide made of an iron-based sintered alloy, the method including the steps of: molding raw material powder including diffusion-alloyed powder including core iron powder and Cu bonded to the core iron powder through diffusion to obtain a molded body; and sintering the molded body, to thereby produce a valve guide made of an iron-based sintered alloy, and a valve guide produced by the production method.

公开(公告)号：US20230127085A1

公开(公告)日：2023-04-27

申请号：US17922613

申请日：2021-04-27

Applicant: TPR Co., Ltd.

Inventor： Fumiya Ito ,  Shohtaroh Hara

IPC: F01L3/08 ,  B22F7/00 ,  B22F5/10 ,  B22F3/16 ,  B22F3/26

Abstract: The present invention addresses the problem of providing a sintered alloy valve guide capable of inhibiting valve adhesion even in a high-temperature environment. The problem can be solved by a sintered alloy valve guide impregnated with a lubricating oil including pores that are sealed on the valve guide outer circumferential surface. More particularly, the problem is solved by the sealing step of performing a sealing treatment of pores on the outer circumferential surface of a sintered body impregnated with a lubricating oil.

公开(公告)号：US11719138B2

公开(公告)日：2023-08-08

申请号：US17922613

申请日：2021-04-27

Applicant: TPR Co., Ltd.

Inventor： Fumiya Ito ,  Shohtaroh Hara

IPC: F01L3/08 ,  B22F3/26 ,  B22F5/10 ,  B22F7/00 ,  B22F3/16 ,  B22F3/24

CPC classification number: F01L3/08 ,  B22F3/16 ,  B22F3/26 ,  B22F5/106 ,  B22F7/002 ,  B22F2003/247 ,  B22F2201/02 ,  B22F2201/20 ,  B22F2301/10 ,  B22F2301/35 ,  B22F2302/40 ,  B22F2998/10 ,  F01L2301/00

Abstract: The present invention addresses the problem of providing a sintered alloy valve guide capable of inhibiting valve adhesion even in a high-temperature environment. The problem can be solved by a sintered alloy valve guide impregnated with a lubricating oil including pores that are sealed on the valve guide outer circumferential surface. More particularly, the problem is solved by the sealing step of performing a sealing treatment of pores on the outer circumferential surface of a sintered body impregnated with a lubricating oil.

公开(公告)号：US11686226B2

公开(公告)日：2023-06-27

申请号：US17922613

申请日：2021-04-27

Applicant: TPR Co., Ltd.

Inventor： Fumiya Ito ,  Shohtaroh Hara

IPC: F01L3/08 ,  B22F3/26 ,  B22F5/10 ,  B22F7/00 ,  B22F3/16 ,  B22F3/24

CPC classification number: F01L3/08 ,  B22F3/16 ,  B22F3/26 ,  B22F5/106 ,  B22F7/002 ,  B22F2003/247 ,  B22F2201/02 ,  B22F2201/20 ,  B22F2301/10 ,  B22F2301/35 ,  B22F2302/40 ,  B22F2998/10 ,  F01L2301/00

Abstract: The present invention addresses the problem of providing a sintered alloy valve guide capable of inhibiting valve adhesion even in a high-temperature environment. The problem can be solved by a sintered alloy valve guide impregnated with a lubricating oil including pores that are sealed on the valve guide outer circumferential surface. More particularly, the problem is solved by the sealing step of performing a sealing treatment of pores on the outer circumferential surface of a sintered body impregnated with a lubricating oil.