Actuator with approach pre-stroke and working stroke for operating a tool
AssigneeThe Aro Corporation
InventorsJean-Noël Boyer, Olivier Tiberghien, Daniel Chevassu
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Abstract
The invention concerns an actuator (21) comprising a pre-stroke rod (29) which can be fixed to the tool body, for example soldering pliers. Thus by pressurising the pre-stroke chamber (27) the working rod (34) for closing the pliers can be brought into an intermediate small opening position, the working piston (31) and the amplifying pistons (36 and 37) remaining retracted in the actuator. Since the rod (29) can then be locked relative to the actuator body (21), pressurisation of the working chamber (32) and the amplifying chambers (38 and 40) will then cause the working rod to be extracted (34) and the soldering pliers to be closed without any recoil from the actuator body.
Claims10
Actuator effecting an approach pre-stroke and a working stroke for maneuvering a tool, comprising an actuator body in which at least two pistons are mounted so as to be able to slide in the actuator body, either in the same direction or in opposite directions, when extracted from the actuator body, namely a pre-stroke piston and at least one working piston actuating the tool, said actuator further comprising locking means disposed between said actuator body and a pre-stroke rod joined to said pre-stroke piston, these locking means operating at least in the retraction direction thereof, characterised in that said working rod and said pre-stroke rod are displaced in the same direction between their retracted position inside said actuator body and their extracted position, the working rod being slidably mounted in an axial compartment of the pre-stroke rod.
Dependencies are inferred from the claim text.