Patent ID: 8485087

Claim:
A fluid distributor apparatus comprising: a body having distribution ports; a spool adapted for controlling said distribution ports and mounted sliding in a first sliding seat obtained in said body, said first sliding seat communicating with said distribution ports; a copying-member mounted sliding and sealed in a second seat obtained in said spool; supply means for a controlled supply of said fluid to said second seat such to provide a controlled sliding of said copying-member, said supply means comprising: chamber means containing said fluid and communicating with said second seat; and pushing means of said fluid mounted sliding and sealed in said chamber means, wherein said pushing means are driven with reciprocating driving means, wherein said driving means comprise cam means adapted to be engaged with said pushing means, and rotary driving means of said cam means, wherein said cam means define a pushing profile, adapted for contact with said pushing means, wherein said pushing means comprise a pushing piston, and wherein a rolling element is placed between said pushing piston and said pushing profile, said rolling element being free to rotate around a rotation pin supported at one end of said pushing piston facing said cam means.