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公开(公告)号：US11125122B1
公开(公告)日：2021-09-21
申请号：US16820930
申请日：2020-03-17
Applicant: Caterpillar Inc.
Inventor： Ashwin A. Hattiangadi , Abram M. Ingold , Sanjay Kumar , Adam D. Patrick
Abstract: A valve seat insert includes a top convex arcuate blend for improving fluid flow, and a valve seating surface for slowing down valve recession. The valve seating surface includes a radially outer convex arcuate segment defining an outer radius of curvature forming a first wear crown for contacting the valve at an early wear state, a radially inner convex arcuate segment defining an inner radius of curvature forming a second wear crown for contacting the valve at a later wear state, and a linear segment extending between the radially outer convex arcuate segment and the radially inner convex arcuate segment.
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公开(公告)号：US20200149440A1
公开(公告)日：2020-05-14
申请号：US16188547
申请日：2018-11-13
Applicant: Caterpillar Inc.
Inventor： Rong Qu , Ashwin Hattiangadi , Sanjay Kumar , Kevin D. Yoder
Abstract: An internal combustion engine includes a valve seat insert within an engine housing, and a gas exchange valve. The valve seat insert has a compound valve seat with a valve recession-resistive profile formed by a leading radius contacted by the valve seat at an early wear state of the valve head and valve seat insert, a trailing radius contacted by the valve head at a later wear state of the valve head and valve seat insert, and an outer seat face. The compound valve seat is shaped and proportioned to cushion contact by a gas exchange valve and retard valve recession.
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公开(公告)号：US09714587B2
公开(公告)日：2017-07-25
申请号：US14595770
申请日：2015-01-13
Applicant: Caterpillar Inc.
Inventor： David Andrew Cyborski , John Stephen Pipis, Jr. , Edwin H. Langewisch , Sanjay Kumar
CPC classification number: F01L1/26 , F01L1/146 , F01L1/2411 , F01L2001/054 , F01L2105/00 , F01L2250/02 , F01L2250/04 , F16K1/14 , F16K1/32
Abstract: A bridge assembly is disclosed for use with an internal combustion engine. The bridge assembly may have a valve bridge, a cylindrical housing disposed within the valve bridge, and a plunger disposed in the cylindrical housing and protruding from the valve bridge. The bridge assembly may also have a valve housing, a post located inside the valve housing, a plurality of obliquely angled ports passing through a straight annular wall portion of the valve housing, and a plurality of radially oriented ports passing through a tapered annular wall portion of the housing. The bridge assembly may further have a valve seat disposed at least partially inside the plunger, a ball disposed within the valve housing and movable between a distal end of the post and the valve seat, a first spring disposed over the post, and a second spring disposed within the cylindrical housing.
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公开(公告)号：US11480075B2
公开(公告)日：2022-10-25
申请号：US17343988
申请日：2021-06-10
Applicant: Caterpillar Inc.
Inventor： Ashwin A. Hattiangadi , Abram M. Ingold , Sanjay Kumar , Adam D. Patrick
Abstract: A valve seat insert includes a top convex arcuate blend for improving fluid flow, and a valve seating surface for slowing down valve recession. The valve seating surface includes a radially outer convex arcuate segment defining an outer radius of curvature forming a first wear crown for contacting the valve at an early wear state, a radially inner convex arcuate segment defining an inner radius of curvature forming a second wear crown for contacting the valve at a later wear state, and a linear segment extending between the radially outer convex arcuate segment and the radially inner convex arcuate segment.
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公开(公告)号：US20210293160A1
公开(公告)日：2021-09-23
申请号：US16821037
申请日：2020-03-17
Applicant: Caterpillar Inc.
Inventor： Ashwin A. Hattiangadi , Abram M. Ingold , Sanjay Kumar , Adam D. Patrick
Abstract: A valve seat insert includes a top convex arcuate blend for improving fluid flow, and a valve seating surface for slowing down valve recession. The valve seating surface includes a radially outer convex arcuate segment defining an outer radius of curvature forming a first wear crown for contacting the valve at an early wear state, a radially inner convex arcuate segment defining an inner radius of curvature forming a second wear crown for contacting the valve at a later wear state, and a linear segment extending between the radially outer convex arcuate segment and the radially inner convex arcuate segment.
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Patent Agency Ranking
公开(公告)号：US20210293159A1
公开(公告)日：2021-09-23
申请号：US16820930
申请日：2020-03-17
Applicant: Caterpillar Inc.
Inventor： Ashwin A. Hattiangadi , Abram M. Ingold , Sanjay Kumar , Adam D. Patrick
Abstract: A valve seat insert includes a top convex arcuate blend for improving fluid flow, and a valve seating surface for slowing down valve recession. The valve seating surface includes a radially outer convex arcuate segment defining an outer radius of curvature forming a first wear crown for contacting the valve at an early wear state, a radially inner convex arcuate segment defining an inner radius of curvature forming a second wear crown for contacting the valve at a later wear state, and a linear segment extending between the radially outer convex arcuate segment and the radially inner convex arcuate segment.
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公开(公告)号：US11473457B2
公开(公告)日：2022-10-18
申请号：US17343948
申请日：2021-06-10
Applicant: Caterpillar Inc.
Inventor： Ashwin A. Hattiangadi , Abram M. Ingold , Sanjay Kumar , Adam D. Patrick
Abstract: A valve seat insert includes a top convex arcuate blend for improving fluid flow, and a valve seating surface for slowing down valve recession. The valve seating surface includes a radially outer convex arcuate segment defining an outer radius of curvature forming a first wear crown for contacting the valve at an early wear state, a radially inner convex arcuate segment defining an inner radius of curvature forming a second wear crown for contacting the valve at a later wear state, and a linear segment extending between the radially outer convex arcuate segment and the radially inner convex arcuate segment.
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公开(公告)号：US20210301688A1
公开(公告)日：2021-09-30
申请号：US17343948
申请日：2021-06-10
Applicant: Caterpillar Inc.
Inventor： Ashwin A. Hattiangadi , Abram M. Ingold , Sanjay Kumar , Adam D. Patrick
Abstract: A valve seat insert includes a top convex arcuate blend for improving fluid flow, and a valve seating surface for slowing down valve recession. The valve seating surface includes a radially outer convex arcuate segment defining an outer radius of curvature forming a first wear crown for contacting the valve at an early wear state, a radially inner convex arcuate segment defining an inner radius of curvature forming a second wear crown for contacting the valve at a later wear state, and a linear segment extending between the radially outer convex arcuate segment and the radially inner convex arcuate segment.
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公开(公告)号：US11125123B1
公开(公告)日：2021-09-21
申请号：US16821037
申请日：2020-03-17
Applicant: Caterpillar Inc.
Inventor： Ashwin A. Hattiangadi , Abram M. Ingold , Sanjay Kumar , Adam D. Patrick
Abstract: A valve seat insert includes a top convex arcuate blend for improving fluid flow, and a valve seating surface for slowing down valve recession. The valve seating surface includes a radially outer convex arcuate segment defining an outer radius of curvature forming a first wear crown for contacting the valve at an early wear state, a radially inner convex arcuate segment defining an inner radius of curvature forming a second wear crown for contacting the valve at a later wear state, and a linear segment extending between the radially outer convex arcuate segment and the radially inner convex arcuate segment.
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公开(公告)号：US10731523B2
公开(公告)日：2020-08-04
申请号：US16188547
申请日：2018-11-13
Applicant: Caterpillar Inc.
Inventor： Rong Qu , Ashwin Hattiangadi , Sanjay Kumar , Kevin D. Yoder
Abstract: An internal combustion engine includes a valve seat insert within an engine housing, and a gas exchange valve. The valve seat insert has a compound valve seat with a valve recession-resistive profile formed by a leading radius contacted by the valve seat at an early wear state of the valve head and valve seat insert, a trailing radius contacted by the valve head at a later wear state of the valve head and valve seat insert, and an outer seat face. The compound valve seat is shaped and proportioned to cushion contact by a gas exchange valve and retard valve recession.
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