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US 5,353,689 AGranted
Impact damping means for power cylinders
AssigneeMosier Industries, Inc.
InventorsDavid J. Bolt, Ray H. Herner
Life of this patent
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AssigneeMosier Industries, Inc.
InventorsDavid J. Bolt, Ray H. Herner
Estimating the term…
An impact damping element is provided including an annular bumper portion and a seal portion surrounding the bumper portion for engaging an inner wall of a cylinder in sealing contact. The impact damping element is adapted to absorb the impact between a piston and the end of a cylinder wall. In one embodiment of the invention, a primary and a secondary bumper are provided wherein the primary bumper has a greater height than the secondary bumper such that the primary bumper absorbs an initial impact between the piston and the cylinder wall and the secondary bumper absorbs the remaining force to prevent direct contact between the piston and the cylinder wall. In an alternative embodiment of the invention, the bumper portion is formed to have different material characteristics than the seal portion whereby the bumper portion is particularly adapted to absorb impact energy and the seal portion is particularly adapted to exhibit low friction characteristics and have a high resistance to abrasion resulting from contact with the inner cylinder wall. The materials forming the seal portion and the bumper portion are preferably co-molded together such that the impact element is formed as an integral unit.
An impact damping element for use with a power cylinder having a piston positioned for reciprocating movement within a cylinder having opposing cylinder ends, said element being adapted to be mounted within said cylinder to cushion impact forces between said piston and said cylinder ends, said element comprising:
The element as in claim 16 wherein said bumper portion and said seal portion are formed as annular members and said element includes a flange portion extending radially inwardly for mounting said element to said piston.
An impact damping element for use with a piston positioned for reciprocating movement within a cylinder having opposing cylinder ends, said element being adapted to be mounted within said cylinder to cushion impact forces between said piston and said cylinder ends, said element comprising:
Dependencies are inferred from the claim text.