Patents by Inventor Pradeep Chapagain

Pradeep Chapagain has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 9822883
    Abstract: A load ring for a seal assembly includes an inner axial surface, an outer axial surface, a first frustoconical surface, a second frustoconical surface, and a rib. The inner and outer axial surfaces are cylindrical and extend along a longitudinal axis. The outer axial surface is in outward radial relationship to the inner axial surface along a radial plane which is perpendicular to the longitudinal axis. The first and second frustoconical surfaces are annular and extend radially between the inner axial surface and the outer axial surface. The second frustoconical surface is in spaced relationship with respect to the first frustoconical surface along the longitudinal axis. The rib projects radially inwardly from the inner axial surface.
    Type: Grant
    Filed: November 28, 2016
    Date of Patent: November 21, 2017
    Assignee: Caterpillar Inc.
    Inventors: Darren B. Antoine, Sunil I. Mathew, Pradeep Chapagain, Brian S. Skauge
  • Publication number: 20170328033
    Abstract: A support assembly for ground engaging tools comprises a tool (106) operatively connected to a working edge (116) of a work implement (100); a support member (134) operatively connected to the working edge (116) separately from the tool a predetermined distance away (164) from the tool (106) along the sweep direction (S, S?); wherein the support member (134) and tool (106) are operatively associated with each other and are configured to provide a load path (128) between the tool (106) and the support member (134) along at least a portion of the sweep direction (S, S?).
    Type: Application
    Filed: May 13, 2016
    Publication date: November 16, 2017
    Applicant: Caterpillar Inc.
    Inventors: Patrick Simon Campomanes, Amit Panjabrao Wankhade, Pradeep Chapagain, Sunil I. Mathew
  • Publication number: 20170328038
    Abstract: A support member for use with a support assembly for ground engaging tools comprises a structural member; and a resilient member that includes a base, and a contact surface, and wherein the structural member defines a direction of assembly and the resilient member defines a length and a width that are perpendicular to each other and to the direction of assembly, wherein the length exceeds the width and the base defines a centerline that is parallel to the length, and the contact face defines a centerline that is parallel to the length.
    Type: Application
    Filed: May 13, 2016
    Publication date: November 16, 2017
    Applicant: Caterpillar Inc.
    Inventors: Patrick Simon Campomanes, Amit Panjabrao Wankhade, Pradeep Chapagain, Sunil I. Mathew
  • Publication number: 20170152951
    Abstract: A load ring for a seal assembly includes an inner axial surface, an outer axial surface, a first frustoconical surface, a second frustoconical surface, and a rib. The inner and outer axial surfaces are cylindrical and extend along a longitudinal axis. The outer axial surface is in outward radial relationship to the inner axial surface along a radial plane which is perpendicular to the longitudinal axis. The first and second frustoconical surfaces are annular and extend radially between the inner axial surface and the outer axial surface. The second frustoconical surface is in spaced relationship with respect to the first frustoconical surface along the longitudinal axis. The rib projects radially inwardly from the inner axial surface.
    Type: Application
    Filed: November 28, 2016
    Publication date: June 1, 2017
    Applicant: Caterpillar Inc.
    Inventors: Darren B. Antoine, Sunil I. Mathew, Pradeep Chapagain, Brian S. Skauge
  • Publication number: 20170146126
    Abstract: A self-adjusting seal for sealing a joint. The joint includes a support member, a mis-alignable component, and a changeable gap between the support member and the mis-alignable component. The seal includes a first part having a generally annular configuration formed of a resiliently crushable material and defining a planar outer seal face to statically seal to the support member and a first seal part opening extending therethrough. A second seal part axially adjoins the first part. The second seal part has a generally annular configuration formed of a rigid material and a second seal part opening extending therethrough in axial alignment with the first seal part opening. The first and second seal part openings define a non-rotation feature to prevent rotation of the seal on the support member, the second seal part defining a planer inner seal face configured to dynamically and sealingly interface with the mis-alignable component.
    Type: Application
    Filed: November 25, 2015
    Publication date: May 25, 2017
    Applicant: Caterpillar Inc.
    Inventors: Charles Taylor Hudson, Sunil I. Mathew, Pradeep Chapagain
  • Publication number: 20170074306
    Abstract: A joint assembly includes a clamp member and a spacer plate. The clamp member includes a first jaw surface and a second jaw surface that define a gap therebetween. The spacer plate is connected to the clamp member such that the spacer plate is disposed within the gap between the first jaw surface and the second jaw surface. The spacer plate includes a body and a seal member. The body includes a perimeter. The seal member is connected to the body such that it is disposed adjacent the perimeter of the body. The seal member extends over a segment of the perimeter of the body. The seal member is in sealing engagement with the first jaw surface and the second jaw surface.
    Type: Application
    Filed: August 12, 2016
    Publication date: March 16, 2017
    Applicant: Caterpillar Inc.
    Inventors: Pradeep Chapagain, Sunil I. Mathew, Charles Taylor Hudson
  • Patent number: 9518789
    Abstract: A seal for a heat exchanger of a machine includes a pad and a sealing lip. The pad includes a perimeter, a core face, and a tank face. The core face is in opposing relationship to the tank face. The pad defines a pad plane and an opening which extends between the core face and the tank face. The scaling lip circumscribes the perimeter of the pad and includes a base end, which is connected to the perimeter of the pad, and a terminal end. The sealing lip extends outwardly along the pad plane from the pad perimeter and projects from the core face. The sealing lip including an outer lip wall which extends from the base end to the terminal end along a tip axis disposed at an oblique lip pitch angle relative to the pad plane.
    Type: Grant
    Filed: September 4, 2014
    Date of Patent: December 13, 2016
    Assignee: Caterpillar Inc.
    Inventors: Joseph L. Kennedy, Travis J. King, James Durand, Tyler Davis, Pradeep Chapagain
  • Publication number: 20160303728
    Abstract: A buffer for an upper surface of a power cell of a hammer is provided. The buffer includes a substantially cylindrical body having an upper surface, a lower surface and a sidewall. A recess extends into the body from the lower surface of the body for engagement with the upper surface of the power cell. The recess has a first section having a first interior wall extending inward relative to the body at a first angle with respect to a line parallel to the lower surface and a second section having a second interior wall extending inward relative to the body at a second angle with respect to the line parallel to the lower surface.
    Type: Application
    Filed: April 17, 2015
    Publication date: October 20, 2016
    Applicant: CATERPILLAR INC.
    Inventors: Pradeep Chapagain, Sunil I. Mathew, Rakesh Jagdale
  • Publication number: 20160290507
    Abstract: A spring seal for a joint assembly pivotally joining a lever arm to a machine frame includes an annular body having a W-shaped cross section. The W-shaped cross section includes a first cantilevered arm, a parallel and spaced apart second cantilevered arm, and a spring leg joining the first and second cantilevered arms. The spring seal is disposed between a bearing surface on the lever arm and a lug on the frame. The W-shaped cross section of the spring seal can collapse and relax to accommodate movement between the lever arm and the frame lug. A second spring seal can be disposed between a second bearing surface on the lever arm and a second frame lug opposite the first lug.
    Type: Application
    Filed: March 30, 2015
    Publication date: October 6, 2016
    Applicant: CATERPILLAR INC.
    Inventors: Pradeep Chapagain, Sunil I. Mathew, Charles Taylor Hudson
  • Patent number: 9409612
    Abstract: A seal assembly can be incorporated into a track joint assembly of an undercarriage of a track-type machine. The track joint can have a first member pivotable about a rotational axis relative to a second member thereof. The first member includes a seal member engagement surface defining, at least in part, an axially-extending seal cavity about the rotational axis and within which the seal assembly is disposed. The seal assembly can include a thrust ring and a seal member mounted to the thrust ring. The seal member includes a first member engagement surface, a second member engagement surface, a frusto-conical inner relief surface, a thrust ring engagement surface, and an outer relief surface.
    Type: Grant
    Filed: April 15, 2014
    Date of Patent: August 9, 2016
    Assignee: Caterpillar Inc.
    Inventors: Sunil Mathew, Mark Kiesel, Pradeep Chapagain
  • Publication number: 20160097454
    Abstract: A seal member for a joint between a pivot member movable about a rotational axis of a shaft includes a ring, a flange, and a resiliently flexible intermediate portion interposed therebetween. The ring includes annular distal and proximal ring faces disposed in spaced relationship to each other along a longitudinal axis. The flange includes a pair of flange faces disposed in spaced relationship to each other along the longitudinal axis. The flange includes outer and inner flange surfaces extending along the longitudinal axis between the pair of flange faces at, respectively, outer and inner flange perimeters thereof. The intermediate portion is connected to the proximal ring face of the ring and to the inner circumferential flange surface of the flange such that the ring is relatively movable with respect to the flange.
    Type: Application
    Filed: August 27, 2015
    Publication date: April 7, 2016
    Inventors: Pradeep Chapagain, Sunil I. Mathew, Charles Taylor Hudson
  • Publication number: 20160097455
    Abstract: A seal member for a joint between a pivot member movable about a rotational axis of a shaft includes a ring, a flange, and a resiliently flexible intermediate portion interposed therebetween. The ring includes annular distal and proximal ring faces disposed in spaced relationship to each other along a longitudinal axis. The flange includes a pair of flange faces disposed in spaced relationship to each other along the longitudinal axis. The flange includes outer and inner flange surfaces extending along the longitudinal axis between the pair of flange faces at, respectively, outer and inner flange perimeters thereof. The intermediate portion has a ring end that circumscribes, and is connected to, an outer circumferential ring surface of the ring and a flange end that is connected to the inner flange surface of the flange such that the ring is relatively movable with respect to the flange.
    Type: Application
    Filed: August 27, 2015
    Publication date: April 7, 2016
    Inventors: Pradeep Chapagain, Sunil I. Mathew, Charles Taylor Hudson
  • Publication number: 20160069620
    Abstract: A seal for a heat exchanger of a machine includes a pad and a sealing lip. The pad includes a perimeter, a core face, and a tank face. The core face is in opposing relationship to the tank face. The pad defines a pad plane and an opening which extends between the core face and the tank face. The scaling lip circumscribes the perimeter of the pad and includes a base end, which is connected to the perimeter of the pad, and a terminal end. The sealing lip extends outwardly along the pad plane from the pad perimeter and projects from the core face. The sealing lip including an outer lip wall which extends from the base end to the terminal end along a tip axis disposed at an oblique lip pitch angle relative to the pad plane.
    Type: Application
    Filed: September 4, 2014
    Publication date: March 10, 2016
    Applicant: CATERPILLAR INC.
    Inventors: Joseph L. KENNEDY, Travis J. KING, James DURAND, Tyler DAVIS, Pradeep CHAPAGAIN
  • Publication number: 20140319905
    Abstract: A seal assembly can be incorporated into a track joint assembly of an undercarriage of a track-type machine. The track joint can have a first member pivotable about a rotational axis relative to a second member thereof. The first member includes a seal member engagement surface defining, at least in part, an axially-extending seal cavity about the rotational axis and within which the seal assembly is disposed. The seal assembly can include a thrust ring and a seal member mounted to the thrust ring. The seal member includes a first member engagement surface, a second member engagement surface, a frusto-conical inner relief surface, a thrust ring engagement surface, and an outer relief surface.
    Type: Application
    Filed: April 15, 2014
    Publication date: October 30, 2014
    Applicant: Caterpillar Inc.
    Inventors: Sunil Mathew, Mark Kiesel, Pradeep Chapagain