EXTENDABLE CYCLINDER, DRILL HEAD AND METHOD
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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N/A
Issued Date -
N/A
app pub date -
Apr 2, 2015
filing date -
Apr 2, 2015
priority date (Note) -
Published
status (Latency Note)
Importance
Abstract
The invention relates to an extendable cylinder (10), in particular an extendable cylinder for a drill head (2000), a drill head comprising an extendable cylinder, and a method of operating a drill head. The extendable cylinder comprises a shaft (100) with a shaft ring volume (101) between an inner part (110) and an outer part (120) of the shaft; a piston (200) with a piston ring volume (201) between an inner part (120) and an outer part (220) of the piston; the piston being moveable with respect to the shaft along a longitudinal axis (LX); a proximal end of the outer part of the piston being arranged between the inner and outer part of the shaft; and a distal end of the inner part of the shaft being arranged between the inner and outer part of the piston; and wherein the extendable cylinder is extendable and/or retractable along the longitudinal axis.
First Claim
Other Claims data not available