Caterpillar Inc.

Rameshkrishnan Lakshminarayanan

Justin Douglas Speichinger

Ananda S Ponnusamy

Cody P Renshaw

Jaime E Ruiz

Kurt Steven Goslovich

Sivakumar Ramanathan

An actuator for a machine includes a cylinder barrel and a piston arrangement received within the cylinder barrel. The actuator further includes a first cylinder received within the cylinder barrel and a first member coupled to the first cylinder at a first cylinder end of the first cylinder. The actuator also includes a second cylinder received within the first cylinder and a second member coupled to the second cylinder at a second cylinder end of the second cylinder. The actuator includes a third cylinder received within the first cylinder and a third member coupled to the third cylinder at a third cylinder end of the third cylinder. At least one of the first member, the second member, and the third member is threadedly coupled to the first cylinder, the second cylinder, and the third cylinder, respectively.

Actuator for machine

Hydraulic cylinder

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.

Hydraulic cylinder sealing arrangement

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Chennai, India

Rameshkrishnan Lakshminarayanan