A portable linear fastener driving tool is provided that drive staples, nails, or other linearly driven fasteners. The tool uses a gas spring principle, in which a cylinder filled with compressed gas is used to quickly force a piston through a driving stroke movement, while a driver also drives a fa
A portable linear fastener driving tool is provided that drive staples, nails, or other linearly driven fasteners. The tool uses a gas spring principle, in which a cylinder filled with compressed gas is used to quickly force a piston through a driving stroke movement, while a driver also drives a fastener into a workpiece. The piston/driver is then moved back to its starting position by use of a rotary-to-linear lifter, and the piston again compresses the gas above the piston, thereby preparing the tool for another driving stroke. The driver has protrusions along its edges that contact the lifter, which lifts the driver during a return stroke. A pivotable latch is controlled to move into either an interfering position or a non-interfering position with respect to the driver protrusions, and acts as a safety device, by preventing the driver from making a full driving stroke at an improper time.
대표청구항▼
1. A fastener driving tool, comprising: (a) a guide body that has a receiving end, an exit end, and a passageway therebetween, said guide body being configured to receive a fastener that is to be driven from said exit end;(b) a driver actuation device having a movable member that creates a displacem
1. A fastener driving tool, comprising: (a) a guide body that has a receiving end, an exit end, and a passageway therebetween, said guide body being configured to receive a fastener that is to be driven from said exit end;(b) a driver actuation device having a movable member that creates a displacement volume;(c) an elongated driver member having a first end and a second end, said first end being in mechanical communication with said movable member of the driver actuation device, said second end being sized and shaped to push a fastener from said exit end of the guide body through at least a portion of said passageway of the guide body, and said driver member having at least one longitudinal edge with a plurality of spaced-apart protrusions;(d) a lifter member which exhibits a contact surface that, at predetermined locations along said contact surface, makes contact with said plurality of spaced-apart protrusions of said driver member such that, when said lifter member is moved in a first direction, it causes a return stroke of an operating cycle and moves said driver member from a driven position toward a ready position, and when said lifter member is moved to a holding position, it temporarily holds said driver member at said ready position by use of a holding contact between said lifter member and said driver member; and(e) a main storage chamber that is in fluidic communication with said displacement volume of the driver actuation device, wherein: (i) said main storage chamber and said displacement volume are charged with a pressurized gas,(ii) when actuated for a driving stroke of said operating cycle, said lifter member moves in said first direction from said holding position and releases said driver member from said holding contact, and said movable member of the driver actuation device is moved by said pressurized gas and moves said driver member from said ready position to said driven position, and(iii) said pressurized gas is not exhausted to atmosphere after said driving stroke, but instead is re-used for a plurality of said operating cycles;(f) an energy source used for causing movement of said lifter member; and(g) a housing that substantially contains said driver actuation device, said elongated driver member, said lifter member, and said main storage chamber, with no external energy source cable and no external hose. 2. The fastener driving tool as recited in claim 1, wherein said energy source comprises an attachable/detachable battery. 3. The fastener driving tool of claim 1, wherein: (a) said lifter member, under first predetermined conditions, forces said driver member to undergo said return stroke and move toward said ready position; and(b) said lifter member, under second predetermined conditions, is moved to a non-engagement position to allow said driver member to undergo said driving stroke and move toward said driven position without interference. 4. The fastener driving tool as recited in claim 1, wherein: (a) said driver actuation device comprises: a hollow cylinder having a cylindrical wall and containing a movable piston therewithin which comprises said movable member, said hollow cylinder having two opposite ends, said hollow cylinder containing said displacement volume, which is created by a stroke of said piston;(b) said receiving end of the guide body is substantially adjacent to one of the ends of the cylinder; and(c) said driver member is in mechanical communication with said piston at the first end of said driver member. 5. The fastener driving tool as recited in claim 1, wherein: said main storage chamber and said displacement volume are charged with a pressurized gas during all portions of said operating cycle. 6. The fastener driving tool as recited in claim 1, wherein: (a) said lifter member is rotated, under said first predetermined conditions, by a drive shaft that is in mechanical communication with said lifter member;(b) said contact surface of the lifter member comprises a plurality of extensions that protrude from a surface of the lifter member and, under said first predetermined conditions, said plurality of extensions are brought into mechanical contact with said at least one plurality of spaced-apart protrusions along said at least one longitudinal edge of the driver member, and thereby, under said first predetermined conditions, moves said driver member from said driven position toward said ready position, and(c) said lifter member is positionable, under said second predetermined conditions such that said plurality of extensions of the lifter member are prevented from mechanically interfering with said at least one plurality of spaced-apart protrusions along said at least one longitudinal edge of the driver member during said driving stroke, in which said driver member is moved from said ready position toward said driven position. 7. The fastener driving tool as recited in claim 1, further comprising a prime mover that provides motive force for said lifter member; and wherein said energy source comprises an electrical power source which provides energy to said prime mover. 8. The fastener driving tool of claim 1, further comprising a fastener magazine for holding a plurality of fasteners, and for supplying said plurality of fasteners to the guide body so as to be driven by said driver member during said driving stroke. 9. The fastener driving tool as recited in claim 1, further comprising a latch element that acts as a safety device with respect to movements of said driver member. 10. The fastener driving tool as recited in claim 1, further comprising a latch member that has a catching surface and a sliding surface, such that: (a) under third predetermined conditions, said latch member is controlled by a separate device and is forced into a non-catching position such that its catching surface does not interfere with said at least one plurality of spaced-apart protrusions of said driver member, thereby allowing said driver member to move in a third direction from said ready position to said driven position; and(b) under fourth predetermined conditions, during which said driver member is being moved in a second direction from said driven position to said ready position, said separate device releases said latch member so that the latch member is not forced into a non-catching position, said latch member is directed toward a catching position, however, said sliding surface of the latch member allows said at least one plurality of spaced-apart protrusions of the driver member to slide along the latch member without being stopped so long as the driver member remains moving in the second direction; and(c) under fifth predetermined conditions, if said driver member moves in said third direction, and if said separate device is not forcing said latch member into said non-catching position, then said latch member is free to engage its catching surface against one of said at least one plurality of spaced-apart protrusions of said driver member, thereby preventing said driver member from further movement in said third direction. 11. A fastener driving tool, comprising: (a) a guide body that has a receiving end, an exit end, and a passageway therebetween, said guide body being configured to receive a fastener that is to be driven from said exit end;(b) a driver actuation device having a movable member that creates a displacement volume;(c) an elongated driver member that is in mechanical communication with said movable member of the driver actuation device at a first end of said driver member: (i) said driver member having a second, opposite end that is sized and shaped to push a fastener from said exit end of the guide body, wherein said passageway of the guide body allows said driver member to pass therethrough toward said exit end during a driving stroke of an operating cycle and toward said receiving end during a return stroke of said operating cycle, said driver member, when at a driven position, protruding toward said exit end of the guide body, and said driver member, when at a ready position, being withdrawn into said guide body, and(ii) said driver member having at least one longitudinal edge with at least one plurality of spaced-apart protrusions;(d) a lifter member that exhibits a contact surface that, at predetermined locations along said contact surface, makes contact with said at least one plurality of spaced-apart protrusions of said driver member such that, if said lifter member is moved in a first direction, it causes said driver member to be moved from said driven position toward said ready position;(e) a main storage chamber that, during said operating cycle, is always in fluidic communication with said displacement volume of the driver actuation device, wherein said main storage chamber and said displacement volume are both charged with a pressurized gas;(f) a housing that substantially contains said driver actuation device, said elongated driver member, said lifter member, and said main storage chamber; and(g) a fastener magazine for holding a plurality of fasteners, and for serially supplying said plurality of fasteners through an opening of the guide body to a position that is coincident with a path of said driver member during said driving stroke;wherein:(h) said lifter member, under first predetermined conditions, forces said driver member to undergo said return stroke and move toward said ready position, and then holds said driver member at said ready position by use of a holding contact between said lifter member and said driver member;(i) said lifter member, under second predetermined conditions, moves in said first direction until it releases said driver member from said holding contact; and said driver actuation device, under said second predetermined conditions, forces said driver member to undergo said driving stroke and move toward said driven position; and(j) said pressurized gas is not exhausted to atmosphere after a driving stroke, but instead it is re-used for a plurality of said operating cycles. 12. The fastener driving tool as recited in claim 11, wherein: (a) said first direction of said lifter member is a rotational direction; and(b) when said lifter member rotates in said first direction, it causes said driver member to move in a substantially linear direction of movement. 13. The fastener driving tool as recited in claim 11, wherein said lifter member exhibits a variable distance driving stroke capability by causing said lifter member to make a different number of rotations during said first predetermined conditions, as said driver member is moved from said driven position toward said ready position. 14. The fastener driving tool as recited in claim 11, wherein: (a) said driver actuation device comprises: a hollow cylinder having a cylindrical wall and containing a movable piston therewithin which comprises said movable member, said hollow cylinder having two opposite ends, said hollow cylinder containing said displacement volume, which is created by a stroke of said piston;(b) the receiving end of said guide body is substantially adjacent to one of the ends of said cylinder; and(c) said driver member is in mechanical communication with said piston at the first end of said driver member. 15. The fastener driving tool as recited in claim 14, wherein said cylinder and piston act as a gas spring, under said second predetermined conditions, to move said driver member from said ready position toward said driven position, using said pressurized gas of both said main storage chamber and said displacement volume acting on said piston. 16. The fastener driving tool as recited in claim 11, further comprising a prime mover that provides motive force for said lifter member. 17. The fastener driving tool as recited in claim 16, further comprising an electrical power source which provides energy to said prime mover. 18. The fastener driving tool as recited in claim 17, wherein said electrical power source comprises an attachable/detachable battery. 19. The fastener driving tool as recited in claim 11, further comprising a one-way mechanism that prevents said lifter member from moving in an opposite rotational direction, and thereby holds said driver element in place at said ready position, wherein said ready position is thereby the tool's rest position. 20. The fastener driving tool as recited in claim 11, further comprising a latch element that acts as a safety device with respect to movements of said driver member.
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이 특허에 인용된 특허 (18)
Lee,Yi Kuan, Air path arrangement for pneumatic nail gun.
Porth,Chris H.; Moeller,Larry M.; Walthall,Barry C.; Henry,Clayton O., Nail advancement systems for nail arrays disposed within nailing tool magazines.
Sollberger Roger W. (5614 Beechmont Ave. Cincinnati OH 45230) Webb Walter J. (5117 Colerain Ave. Cincinnati OH 45223), Portable electric fastener driving apparatus.
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