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公开(公告)号：US12209667B2
公开(公告)日：2025-01-28
申请号：US17740569
申请日：2022-05-10
Applicant: CATERPILLAR INC.
Inventor： Ananda Sudhakar Ponnusamy , Rameshkrishnan Lakshminarayanan , Justin Douglas Speichinger , Cody Patrick Renshaw , Jaime E. Ruiz
IPC: F16J15/32 , F15B15/14 , F16J15/16 , F16J15/3232
Abstract: A combination of seals and wear guides for use in a hydraulic cylinder provides a sealed engagement between a piston rod of the hydraulic cylinder and an inner circumferential surface of a rod end of a cylinder barrel of the hydraulic cylinder through which the piston rod is axially movable. The combination includes a cylindrical metallic wear guide for seating within a first annular groove formed around the inner circumferential surface, a buffer seal assembly including an annular buffer seal cooperatively mated with an annular backup ring for seating within a second annular groove, a U-cup seal for seating within a third annular groove, a cylindrical plastic wear guide for seating within a fourth annular groove, and a triple lip wiper seal including three ringed lip portions for seating within a fifth annular groove.
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公开(公告)号：US11982138B2
公开(公告)日：2024-05-14
申请号：US17726678
申请日：2022-04-22
Applicant: Caterpillar Inc.
Inventor： Satish Nutakki , Kurt Steven Goslovich , Ananda Sudhakar Ponnusamy , Christopher John Demick
IPC: E21B19/084 , E21B7/02
CPC classification number: E21B19/084 , E21B7/022 , E21B7/025
Abstract: The pulldown apparatus may comprise a main stage and a secondary stage. The main stage may comprise a cylinder, a main head, a main gland, a piston and a main rod. The cylinder defines a chamber and includes a first end and a second end. The main gland and the piston is disposed in the chamber. The main rod is disposed in the chamber between the piston and the second end. The secondary stage includes a secondary head, a secondary gland, a secondary rod and a flange. The secondary gland is disposed in the chamber. The secondary rod is coupled to the flange. The flange is coupled to the main stage and disposed inside the cylinder between the piston and the secondary rod. The cylinder is slidable over the main rod, the piston and the secondary rod.
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公开(公告)号：US12196324B1
公开(公告)日：2025-01-14
申请号：US18220367
申请日：2023-07-11
Applicant: CATERPILLAR INC.
Inventor： Ananda Sudhakar Ponnusamy
IPC: F16J9/20
Abstract: An annular seal for use in a hydraulic device provides a static seal between two components of the hydraulic device that do not move relative to each other. The annular seal has a cross-section that is substantially M-shaped along one of an inner diameter circumferential surface of the annular seal or an outer diameter circumferential surface of the annular seal. The other of the inner diameter circumferential surface or the outer diameter circumferential surface of the annular seal includes opposite side cylindrical portions extending substantially parallel to a central axis of the annular seal with a concave central portion disposed between the opposite side cylindrical portions.
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公开(公告)号：US12152614B2
公开(公告)日：2024-11-26
申请号：US17740536
申请日：2022-05-10
Applicant: CATERPILLAR INC.
Inventor： Ananda Sudhakar Ponnusamy
IPC: F16J15/32 , F15B15/14 , F16J15/16 , F16J15/3204
Abstract: A seal assembly for a hydraulic cylinder piston rod of a hydraulic cylinder includes an annular buffer seal and an annular backup ring. A first axial pressure side of the annular buffer ring faces a rod end chamber of the hydraulic cylinder and fits adjacent a first axial side surface of an annular groove defined in a rod end of the hydraulic cylinder through which the piston rod passes, and a second axial seal side opposite from the first axial pressure side includes a radially outer annular seal surface and a radially inner annular seal surface, wherein the radially outer annular seal surface is spaced farther from the first axial pressure side of the annular buffer seal than the radially inner annular seal surface of the buffer seal such that an annular notch is formed around an inner diameter of the annular buffer seal on the second axial seal side of the annular buffer seal. The annular backup ring includes a radially extending leg portion that extends along substantially an entire radial extent of the radially outer annular seal surface of the annular buffer seal, and an axially extending leg portion that extends axially into the annular notch formed around the inner diameter of the annular buffer seal on the second axial seal side of the annular buffer seal.
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Patent Agency Ranking
公开(公告)号：US20230366466A1
公开(公告)日：2023-11-16
申请号：US17740569
申请日：2022-05-10
Applicant: CATERPILLAR INC.
Inventor： Ananda Sudhakar Ponnusamy , Rameshkrishnan Lakshminarayanan , Justin Douglas Speichinger , Cody Patrick Renshaw , Jaime E. Ruiz
IPC: F16J15/3232 , F15B15/14 , F16J15/16
CPC classification number: F16J15/3232 , F15B15/1452 , F16J15/166
Abstract: A combination of seals and wear guides for use in a hydraulic cylinder provides a sealed engagement between a piston rod of the hydraulic cylinder and an inner circumferential surface of a rod end of a cylinder barrel of the hydraulic cylinder through which the piston rod is axially movable. The combination includes a cylindrical metallic wear guide for seating within a first annular groove formed around the inner circumferential surface, a buffer seal assembly including an annular buffer seal cooperatively mated with an annular backup ring for seating within a second annular groove, a U-cup seal for seating within a third annular groove, a cylindrical plastic wear guide for seating within a fourth annular groove, and a triple lip wiper seal including three ringed lip portions for seating within a fifth annular groove.
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公开(公告)号：US20250020208A1
公开(公告)日：2025-01-16
申请号：US18220367
申请日：2023-07-11
Applicant: CATERPILLAR INC.
Inventor： Ananda Sudhakar Ponnusamy
IPC: F16J9/20
Abstract: An annular seal for use in a hydraulic device provides a static seal between two components of the hydraulic device that do not move relative to each other. The annular seal has a cross-section that is substantially M-shaped along one of an inner diameter circumferential surface of the annular seal or an outer diameter circumferential surface of the annular seal. The other of the inner diameter circumferential surface or the outer diameter circumferential surface of the annular seal includes opposite side cylindrical portions extending substantially parallel to a central axis of the annular seal with a concave central portion disposed between the opposite side cylindrical portions.
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公开(公告)号：US20240044779A1
公开(公告)日：2024-02-08
申请号：US17882511
申请日：2022-08-05
Applicant: Caterpillar Inc.
Inventor： Russell Ross Henderson , Ananda Sudhakar Ponnusamy , Abdul K. Maoued , Kurt Steven Goslovich
CPC classification number: G01N21/31 , G01N33/2835
Abstract: Manufactures and methods implement wear components containing a subsurface underlying incipient failure indicator, machinery parts including at least one wear component containing a subsurface underlying incipient failure indicator, and mechanical systems including at least one machinery part including at least one wear component containing a subsurface underlying incipient failure indicator. An elastomeric seal has one or more failure indicators including a spectrally distinguishable element and/or molecule from operating-native constituent matter of a mechanical system underlying at one or more subsurface distances, including at least one subsurface distance within an incipient failure region. Abrasive wear of an elastomeric seals can expose subsurface strata having failure indicators embedded therein, each exposure causing a spectrally distinguishable element and/or molecule to mingle with lubricant of the mechanical system. Based on detecting the failure-indicating characteristic spectrum, the mechanical system can be removed from operation and one or more elastomeric seals replaced.
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公开(公告)号：US20230366415A1
公开(公告)日：2023-11-16
申请号：US17740536
申请日：2022-05-10
Applicant: CATERPILLAR INC.
Inventor： Ananda Sudhakar Ponnusamy
IPC: F15B15/14 , F16J15/16 , F16J15/3204
CPC classification number: F15B15/1452 , F16J15/166 , F16J15/3204
Abstract: A seal assembly for a hydraulic cylinder piston rod of a hydraulic cylinder includes an annular buffer seal and an annular backup ring. A first axial pressure side of the annular buffer ring faces a rod end chamber of the hydraulic cylinder and fits adjacent a first axial side surface of an annular groove defined in a rod end of the hydraulic cylinder through which the piston rod passes, and a second axial seal side opposite from the first axial pressure side includes a radially outer annular seal surface and a radially inner annular seal surface, wherein the radially outer annular seal surface is spaced farther from the first axial pressure side of the annular buffer seal than the radially inner annular seal surface of the buffer seal such that an annular notch is formed around an inner diameter of the annular buffer seal on the second axial seal side of the annular buffer seal. The annular backup ring includes a radially extending leg portion that extends along substantially an entire radial extent of the radially outer annular seal surface of the annular buffer seal, and an axially extending leg portion that extends axially into the annular notch formed around the inner diameter of the annular buffer seal on the second axial seal side of the annular buffer seal.
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公开(公告)号：US20230340839A1
公开(公告)日：2023-10-26
申请号：US17726678
申请日：2022-04-22
Applicant: Caterpillar Inc.
Inventor： Satish NUTAKKI , Kurt Steven Goslovich , Ananda Sudhakar Ponnusamy , Christopher John Demick
IPC: E21B19/084 , E21B7/02
CPC classification number: E21B19/084 , E21B7/025 , E21B7/022
Abstract: The pulldown apparatus may comprise a main stage and a secondary stage. The main stage may comprise a cylinder, a main head, a main gland, a piston and a main rod. The cylinder defines a chamber and includes a first end and a second end. The main gland and the piston is disposed in the chamber. The main rod is disposed in the chamber between the piston and the second end. The secondary stage includes a secondary head, a secondary gland, a secondary rod and a flange. The secondary gland is disposed in the chamber. The secondary rod is coupled to the flange. The flange is coupled to the main stage and disposed inside the cylinder between the piston and the secondary rod. The cylinder is slidable over the main rod, the piston and the secondary rod.
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