Actuation system
AssigneeGlobalforce IP Limited
InventorHamish William Hamilton
Life of this patent
Estimating the term…
Abstract
A device includes an actuation system with a dose chamber including an inlet for high pressure fluid. A working chamber extends away from the dose chamber. An annular wall separates a portion of the working chamber from the dose chamber such that the dose chamber encompasses the portion of the working chamber. In use an item to be driven along the working chamber is at least partially within the surrounded portion of the working chamber with the item at one end of its travel in the working chamber. A valve mechanism selectively allows high pressure fluid from the dose chamber to flow into the piston chamber.
Claims9
A device comprising:
- a dose chamber including an inlet for high pressure fluid;
- a working chamber having an inlet end;
- a valve member with an annular sealing surface surrounding the inlet end of the working chamber, wherein with the valve member in a closed condition the sealing surface meets with an annular seat;
- and with the valve member in an open condition a gap is presented between the annular sealing surface and the seat as an outlet from the dose chamber to the working chamber;
- and
- a triggering mechanism including a hammer to unseat the valve member to the open condition, wherein the hammer is movable between positions, including a first position extending through a port into the working chamber to bear on the valve member, and a second position withdrawn from contacting the valve member.
A device comprising:
- a dose chamber including an inlet for high pressure fluid;
- a working chamber having an inlet end;
- a valve member with an annular sealing surface surrounding the inlet end of the working chamber, wherein with the valve member in a closed condition the sealing surface meets with an annular seat;
- and with the valve member in an open condition a gap is presented between the annular sealing surface and the seat as an outlet from the dose chamber to the working chamber;
- and
- a triggering mechanism including a hammer to unseat the valve member to the open condition;
- wherein the hammer is movable between positions including a first position extending through a port into the working chamber to bear on the valve member, and a second position withdrawn from contacting the valve member, and the hammer seals with the port in the first position, but not in the second position.
Dependencies are inferred from the claim text.