Double acting cylinder with integral end position volume chambers
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United States of America Patent
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-
Mar 25, 2003
Grant Date -
Dec 12, 2002
app pub date -
Jun 8, 2001
filing date -
Jun 8, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A pneumatic cylinder having a cylinder tube with at least one open end coupled to an end cap to close the open end. The pneumatic cylinder includes a piston reciprocally movable in the cylinder and the piston has a first seal to create a substantially fluid-tight seal with the internal surface of the cylinder tube. The piston has a piston spear at the end portion thereof for cooperating with a piston spear receiving space in the end cap. A second seal is provided in the piston spear receiving space for creating a substantially fluid-tight seal between the piston spear and the piston spear receiving space thereby creating a volume chamber between the first and second seals. The volume chamber provides a compressible volume of volume which acts as an air cushion at the end of the piston stroke.
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