Cylinder apparatus
AssigneeAndo Seisakujo Co., Ltd.
InventorEtuo Ando
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Abstract
A cylinder apparatus capable of effectively restraining a loss of energy with a simple structure at a low cost. When a piston 16 of a main cylinder 11 cuts off a communication between a subchamber 20 and a supply/exhaust passage 32, a pressure of the subchamber 20 is pushed by the piston 16 and thereby increased. However, an exhaust fluid from the subchamber 20 having the increased pressure is fed to a subcylinder 62. A piston 48 is moved while controlling a velocity by a flow rate control valve 70 in synchronization with the piston 16. This arrangement eliminates a necessity for a special position detector, etc.. The structure is therefore simplified, and the cost decreases. Simultaneously, the energy can be effectively utilized because of employing the exhaust fluid.
Claims6
A cylinder apparatus comprising:
- a main cylinder incorporating a cylinder chamber partitioned into two subchambers by a piston;
- a pair of supply/exhaust passages, connected to said two subchambers of said main cylinder, for supplying and exhausting a fluid to and from said two subchambers;
- a cut-off member, provided on said piston of said main cylinder, for cutting off a communication between said one subchamber from which the fluid is pushed and said one supply/exhaust passage on a low pressure side when said piston moves toward one stroke end and reaches the vicinity of said one stroke end;
- a subcylinder incorporating a cylinder chamber partitioned into two subchambers by a piston;
- a connection passage for always connecting any one of said subchambers of said subcylinder to said one subchamber of said main cylinder and causing a movement of said piston of said subcylinder by leading the fluid of said one subchamber of said main cylinder having an increased pressure due to a cut-off by said cut-off member into said subchamber of said subcylinder;
- an escape passage for connecting the middle of said connection passage to said one supply/exhaust passage on the low pressure side and escaping the fluid of said connection passage to said one supply/exhaust passage on the low pressure side;
- and
- a flow rate control valve, provided in the middle of said escape passage, for controlling a flow rate of the fluid to be escaped.
Dependencies are inferred from the claim text.