Pneumatic device
OwnerYueh-Pei Liuinventor
Life of this patent
Estimating the term…
Abstract
A pneumatic device includes a casing unit defining a first chamber, a receiving space and a front space; a cylinder movably received in the receiving space, defining a second chamber and a releasing room, and having an air passage unit and an annular groove; and a hollow piston rod in sliding engagement with the cylinder, and having an inlet channel, a communicating room and an air hole unit. The cylinder and the piston rod are movable to change between a pneumatic state, where the air hole unit is communicated with the inlet channel, the annular groove, the communicating room and the second chamber, and an air discharging state, where the air passage unit is communicated with the second chamber, the receiving space and the releasing room.
Claims9
A pneumatic device adapted to be connected to an air supply device, said pneumatic device comprising:
- a casing unit surrounding an axis, defining a first chamber, a receiving space and a front space that are arranged along the axis, and having an air inlet that is adapted to allow entry of air from the air supply device, said receiving space being disposed between and in spatial communication with said first chamber and said front space;
- a cylinder movably received in said receiving space, and having
- a surrounding wall that surrounds the axis,
- a partition wall that extends in a direction transverse to the axis, and that is surrounded by and connected to said surrounding wall such that said partition wall divides an inner space of said surrounding wall into a second chamber opened towards said first chamber, and a releasing room opened towards said front space,
- an air passage unit that is formed in said surrounding wall, and
- an annular groove that is indented from an inner surface of said surrounding wall, and that is disposed about the axis;
- a hollow piston rod movably extending from said first chamber into said second chamber, and being in sliding engagement with said inner surface of said surrounding wall, said piston rod having
- an inlet channel that extends along the axis and that is in spatial communication with said first chamber,
- a communicating room that is separated from said inlet channel, and that is in spatial communication with said second chamber, and
- an air hole unit in spatial communication with said inlet channel and said communicating room;
- an impact unit detachably mounted in said releasing room of said cylinder and having an impact portion that is exposed outwardly from said casing unit;
- and
- a resilient member disposed in said front space and connected resiliently between said casing unit and said impact member for pushing said impact unit towards said piston rod;
- wherein said cylinder and said piston rod are movable reciprocally relative to each other along the axis to change between
- a pneumatic state, where said air hole unit spatially communicates said inlet channel with said annular groove and spatially communicates said annular groove with said communicating room and said second chamber, such that the air is allowed to travel from said inlet channel into said second chamber, so as to move said impact portion of said impact unit away from said casing unit, and
- an air discharging state, where said air passage unit spatially communicates said second chamber with said receiving space, and spatially communicates said receiving space with said releasing room, such that the air is allowed to travel from said second chamber into said releasing room and to be discharged out of said casing unit, so as to move said impact portion of said impact unit towards said casing unit by restoring action of said resilient member.
Dependencies are inferred from the claim text.