公开(公告)号：US11098674B2

公开(公告)日：2021-08-24

申请号：US16477232

申请日：2018-01-10

Applicant: H.E.F.

Inventor： Fabrice Prost ,  Christophe Heau ,  Romain Montelimard

IPC: F02F3/00 ,  F16J1/02 ,  F16J9/00

Abstract: Various implementations include a combustion engine piston, including a skirt in a counter-part and including a first contact area of the piston in the counter-part, a head which extends transverse to a central axis, and a ring carrier which comprises at least two lands and at least two grooves for receiving the rings, including a first land adjoining the head and a second land situated between the first land and the skirt, wherein the lands include at least one contact land having a diameter greater than a minimum diameter of the skirt to form a second contact area of the piston in the counter-part, and wherein at least one contact land comprises a friction-reducing surface coating, formed at least on a radial sector covering an angle of at least 30 degrees, and up to on a single sector covering an angle of 360 degrees.

公开(公告)号：US11001678B2

公开(公告)日：2021-05-11

申请号：US15741432

申请日：2016-07-01

Applicant: H.E.F.

Inventor： Constantin Iacob ,  Sébastien Bucher ,  Fabrice Prost

IPC: C09K5/14 ,  H01B1/22 ,  C08J3/12 ,  H01B1/02 ,  H01B1/08 ,  H01B1/12 ,  H01B1/24

Abstract: Some embodiments are directed to the manufacture of functional composites (electrical conductors, thermal conductors, etc.) produced from coated powders.

公开(公告)号：US11624399B2

公开(公告)日：2023-04-11

申请号：US16626594

申请日：2018-07-03

Applicant: H.E.F.

Inventor： Mohamadou Bocar Diew ,  Yves René Alexis Gachon ,  Fabrice Prost

IPC: F16C9/04 ,  F16C33/10 ,  F16C33/04 ,  F02F3/00

Abstract: The present invention relates to a mechanical system (1), comprising a bearing (4) and a shaft (10) coupled to the bearing (4), especially for an internal combustion engine, being subjected to average contact pressures of less than 200 MPa. The shaft (10) has at least one area (12) provided with an anti-seizing surface coating (20), having a surface hardness at least twice that of the bearing (4), and a microtexturation (30) comprised of a set of individual microcavities (31), distributed in said area (12). The invention also relates to a method for manufacturing such a mechanical system (1).

公开(公告)号：US10858720B2

公开(公告)日：2020-12-08

申请号：US15327116

申请日：2015-07-16

Applicant: H.E.F.

Inventor： Stéphan Grandjean ,  Fabrice Prost

IPC: C21D10/00 ,  C23C8/28 ,  B23K9/235 ,  B23K9/167 ,  B23K26/21 ,  C23C8/80 ,  B23K26/32 ,  B23K9/23 ,  B23K26/60 ,  B23K26/352 ,  C23C8/26 ,  B23K103/04

Abstract: In a method of treating a nitrided/nitrocarburized workpiece, at least a portion of the workpiece is subjected to a first step in which at least one laser beam is moved in at least one pass over the portion, until the surface layer of the portion is transformed in part or in full, and until the distribution of the nitrogen concentration in the diffusion zone is modified. In a second step at least one laser beam is moved in at least one pass over said portion so as to enable the nitrogen concentration in the underlying diffusion layer to be reduced.

公开(公告)号：US10125868B2

公开(公告)日：2018-11-13

申请号：US14912496

申请日：2014-08-12

Applicant: H.E.F. ,  MAHLE INTERNATIONAL GMBH

Inventor： Sandrine Henry ,  Christophe Heau ,  Fabrice Prost ,  Roland Lochmann ,  Marco Maurizi

IPC: F16J1/16 ,  C23C16/27 ,  C23C16/50 ,  C23C14/06 ,  C23C14/00 ,  C23C14/02

Abstract: The piston pin has an anti-seize coating limited to an angular sector corresponding at least to a friction area submitted to a contact pressure along a preferential direction.

公开(公告)号：US11111400B2

公开(公告)日：2021-09-07

申请号：US16331908

申请日：2017-09-08

Applicant: H.E.F.

Inventor： Constantin Iacob ,  Sébastien Bucher ,  Fabrice Prost ,  Christophe Heau

IPC: C09D11/037 ,  B01J13/02 ,  B33Y70/00 ,  B22F1/00 ,  C09D11/102 ,  B22F9/04

Abstract: Some embodiments are directed to a multimaterial powder used in the field of metallurgy and plasturgy. The multimaterial powder includes support particles having a median particle size distribution between 1 μm and 100 μm and functionalising particles having a median particle size distribution that is a factor of 10 to 1000 lower relative to the support particles. The powder is characterised in that the support particles and the functionalising particles form composite grains having a core-shell structure that each have a core formed by a support particle, and a shell, that covers between 10 and 100% of the surface of the support particle and which is formed by at least one surface layer of the functionalising particles.