Patent ID: 11946393
Assignee: PIAGGIO & C. SPA
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 3:
4. The camshaft according to claim 1, wherein said switch comprises a slide valve, wherein said first thrust means and second thrust means are housed in a third pipe and a fourth pipe, respectively, each in fluid communication with said first pipe, wherein said slide valve is shaped so that, when positioned in said first position, said first pipe and said third pipe are put into communication so as to define a closed circuit, which allows the flow of said hydraulic fluid from said first pipe to said third pipe and from said third pipe to said first pipe while said first pipe and said fourth pipe are put into communication so as to define a blind circuit, which allows the flow of said hydraulic fluid only from said first pipe to said fourth pipe, and wherein said slide valve is shaped so that, when positioned in said second position, said first pipe and said third pipe are put into communication so as to define a blind circuit, which allows the flow of said hydraulic fluid only from said first pipe to said third pipe while said first pipe and said fourth pipe are put into communication so as to define a closed circuit, which allows the flow of said hydraulic fluid from said first pipe to said fourth pipe and from said fourth pipe to said first pipe.