Patent ID: 6640689
Filing Date: 2003-11-04
Classification: F15B,Y10T

Abstract:
A double-rack-and-pinion apparatus comprising:a casing; a first cylinder bore and a second cylinder bore provided in parallel with each other in said casing; a flow path forming member mounted to a bottom of said casing, said flow path forming member being oriented substantially parallel to said first and second cylinder bores; a first piston and a second piston for sliding in said cylinder bores; racks provided to said respective pistons and a pinion engaged with said racks; first pressure chambers and second pressure chambers formed respectively on opposite ends of said respective pistons; a first port and a second port for supplying pressure fluid to said respective pressure chambers; and a first flow path connecting said first pressure chamber on one end of said first piston and said second pressure chamber on one end of said second piston and a second flow path connecting said second pressure chamber on the other end of said first piston and said first pressure chamber on the other end of said second piston, said first and second flow paths being formed between said bottom of said casing and said flow path forming member.