Shock absorber including noise reducing means

Claim 2

A shock absorber assembly comprising, an elongated pressure cylinder defining a first cylindrical surface, a piston reciprocally disposed within said cylinder and connected to one end of a piston rod projecting axially outwardly from said cylinder, a cylindrical reserve tube extending concentrically around said pressure cylinder and defining a second cylindrical surface and an elongated cylindrical reservoir of predetermined radial dimension therewith, said reservoir being partially filled with a quantity of hydraulic damping fluid and partially with a quantity of gas, a base valve in the lower end of said pressure cylinder for selectively communicating damping fluid between said cylinder and said reservoir upon reciprocation of said piston, and a noise reducing member disposed within said reservoir at a position spaced away from the axially opposite ends thereof and fixedly secured against relative axial movement therewithin, said member being of a substantially solid, non-deformable construction and said member being in the form of a hollow right circular cylinder substantially one forth the axial length of the reservoir and having inner and outer cylindrical faces, one of said faces contiguously engaged with one of said surfaces and one of said faces defining a restricted flow path with one of said surfaces.

Claim 3

A shock absorber assembly comprising, an elongated pressure cylinder, a piston reciprocally disposed within said cylinder and connected to one end of a piston rod projecting axially outwardly from said cylinder, a cylindrical reserve tube extending concentrically around said pressure cylinder and defining an elongated cylindrical reservoir of predetermined radial dimension therewith, said reservoir being partially filled with a quantity of hydraulic damping fluid and partially with a quantity of gas, a base valve in the lower end of said pressure cylinder for selectively communicating damping fluid between said cylinder and said reservoir upon reciprocation of said piston, and a hollow cylindrical noise reducing member disposed within said reservoir at a position spaced away from the axially opposite ends thereof and fixedly secured against relative axial movement therewithin, said member having a radial thickness predeterminately less than said radial dimension of said reservoir so as to define a restricted fluid flow path with the inner periphery of said reservoir, whereby fluid may flow axially within said reservoir through said flow path between positions above and below said member, said member having the inner periphery thereof contiguously engaged with the outer periphery of said pressure cylinder and the outer periphery thereof contiguously engaged with the inner periphery of said reserve tube, with the inner and outer peripheries of said member being formed with a plurality of circumferentially staggered recesses extending the entire length of said member and defining said flow path.

Claim 4

A shock absorber assembly comprising, an elongated pressure cylinder, a piston reciprocally disposed within said cylinder and connected to one end of a piston rod projecting axially outwardly from said cylinder, a cylindrical reserve tube extending concentrically around said pressure cylinder and defining an elongated cylindrical reservoir of predetermined radial dimension therewith, said reservoir being partially filled with a quantity of hydraulic damping fluid and partially with a quantity of gas, a base valve in the lower end of said pressure cylinder for selectively communicating damping fluid between said cylinder and said reservoir upon reciprocation of said piston, and a hollow cylindrical noise reducing member disposed within said reservoir at a position spaced away from the axially opposite ends thereof and fixedly secured against relative axial movement therewithin, said member having a radial thickness predeterminately less than said radial dimension of said reservoir so as to define a restricted fluid flow path with the inner periphery of said reservoir, whereby fluid may flow axially within said reservoir through said flow path between positions above and below said member, said member having the inner periphery thereof contiguously engaged with the outer periphery of said pressure cylinder and the outer periphery thereof contiguously engaged with the inner periphery of said reserve tube, with the inner and outer peripheries of said member being formed with a plurality of circumferentially staggered recesses extending the entire length of said member and defining said flow path.