Patent ID: 6196112
Filing Date: 2001-03-06
Classification: F15B

Abstract:
A fluid pressure actuator comprisinga cylinder tube capable of accepting at least one piston;a closure element provided on a first end of said cylinder tube; anda manufactured insert inserted into said closure element;wherein respective sealing chamfers, each having a slope between 6 degrees and 12 degrees, are provided on said manufactured insert and on said first end of said cylinder tube and respective screws threads are provided on said closure element and said first end of said cylinder tube, near said respective sealing chamfers;wherein portions of said manufactured insert and said first end of said cylinder tube including said respective sealing chamfers are made of a material having a modulus of elasticity in a range between 60*103 N/mm.sup.2 and 250*103 N/mm.sup.2, plus or minus 10%, and an elastic limit in a range between 200 and 1050 N/mm.sup.2, over a temperature range of 0.degree. C. to 20.degree. C.; andwhereby, when said closure element is screwed on said first end of said cylinder tube by means of said respective screw threads, said respective sealing chamfers of said manufactured insert and said first end of said cylinder tube are pressed on each other and thus interact to prevent leakage of fluid between said closure element and said first end of said cylinder tube.