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US 6,745,876 B2Granted
Piston-cylinder assembly
AssigneeZF Sachs AG
InventorHubert Beck
Life of this patent
Estimating the term…
Abstract
A piston-cylinder assembly includes a cylinder, in which a piston rod with a piston is guided axially by a piston rod guide. A distance detection system is used to determine the position of the piston in the cylinder. The distance detection system includes a sensor and a transmitter. The sensor is mounted on the piston or on the bottom of the cylinder. Upon axial displacement of the piston, the transmitter travels a distance different from that traveled by the piston, the difference between the two distances being used to determine the position of the piston.
Claims7
A piston-cylinder assembly, comprising:
- a cylinder having a top end, a bottom end, and an inside wall;
- a piston rod having a piston movably arranged for axial movement in said cylinder;
- a piston rod guide arranged in said cylinder for guiding the axial movement of said piston rod;
- a distance detection system for detecting a position of said piston in said cylinder, said distance detection system comprising a sensor and a transmitter, said sensor being mounted on one of said piston and said bottom end of said cylinder, wherein said transmitter moves a first distance in response to an axial displacement of said piston in said cylinder by a second distance different than said first distance, wherein said distance detection system determines said position of said piston in response to the difference between said first and second distances;
- and
- a first spring arranged between said transmitter and said piston and a second sprint arranged between said transmitter and said bottom end of said cylinder, said transmitter supported by said first spring and said second spring.
3 more elements
Dependencies are inferred from the claim text.