Patent ID: 6116140
Filing Date: 2000-09-12
Classification: F15B

Abstract:
A telescoping system, comprising:a multi-stage telescopic cylinder including at least a first tele cylinder and a second tele cylinder, said first tele cylinder including a first rod and a first piston head, and said second tele cylinder including a second rod, second piston head, and a first cylinder;said first piston head disposed in said second rod and connected to a first end of said first rod;said second piston head disposed in said first cylinder and connected to a first end of said second rod;said second rod including an inner cylindrical wall and an outer cylindrical wall, said inner cylindrical wall extending through said first piston head into said first rod, said outer cylindrical wall having an inner barrel and an outer barrel defining a first passageway;said inner barrel, said first rod and said first piston head defining a first chamber, and said inner barrel including a second passageway between said first chamber and said first passageway;said outer barrel, said second piston head and said first cylinder defining a second chamber, said outer barrel including a third passageway between said first passageway and said second chamber; andsaid first rod and said first piston head defining a fourth passageway communicating with said first chamber.