Actuating force generating device
AssigneeTokico Ltd.
InventorSusumu Sugiura
Life of this patent
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Abstract
An actuating force generating device has a multi-stage cylinder body consisting of a plurality of cylinders having different diameters and arranged in series; a plurality of pistons slidably fitted in the cylinders, respectively; fluid ports each provided in the cylinders to discharge or introduce fluid from or into the cylinders; a container provided in the rear of the multi-stage cylinder body; a piston rod forming an actuating end projecting from the multi-stage cylinder body, said rod extending through a rod guide and being affixed to the forward piston; and a resilient member adapted to urge the rearmost piston forwardly.
Claims4
An actuating force generating device comprising a two stage cylinder body consisting of small and large diameter cylinders arranged coaxially, small and large diameter pistons respectively slidably positioned in said cylinders, the forward end of each of said cylinders having a fluid port therein, a piston rod affixed to the end of said small diameter piston remote from said large diameter piston and having a forward actuating end projecting outwardly from the small diameter cylinder, a container disposed adjacent to the large diameter cylinder at the end of said cylinder body, remote from said small diameter cylinder, a connecting rod extending slidably through the large diameter piston in sealing relation therewith and connected to said small diameter piston, means on said connecting rod transmitting actuating force from the large diameter piston to the connecting rod, first resilient means disposed in said container coupled only to said large diameter piston, and second resilient means in said container coupled only to the rear end of said connecting rod, a portion of the force being transmitted of said first and second resilient means to said large diameter piston and the remainder of the force to said connecting rod, whereby, when hydraulic liquid which has been introduced into said small diameter cylinder is discharged therefrom said remainder portion of the force of said resilient means may be transmitted to said piston rod for generating an actuating force.
Dependencies are inferred from the claim text.