초록 ▼

An indirect firing fastener driving tool is provided including a barrel (51), a piston (6) sliding in the barrel for driving a fastener (3) housed in a fastener guide (7). Between the barrel (51) and the fastener guide (7) are disposed a rigid ring (22) and a resilient ring (24). Inside the resilien

An indirect firing fastener driving tool is provided including a barrel (51), a piston (6) sliding in the barrel for driving a fastener (3) housed in a fastener guide (7). Between the barrel (51) and the fastener guide (7) are disposed a rigid ring (22) and a resilient ring (24). Inside the resilient ring (24) is disposed a rigid ring (27) for limiting the stroke of the ring (22) intended to be received in a recess (25) provided at the rear part of the fastener guide (7). The head (14) of the piston is of a truncated cone shape and may cooperate with a bore (23) of corresponding shape in the rigid ring (22). The rings serve as absorber for the piston (6) whose stroke is thus controlled.

대표청구항 ▼

An indirect firing fastener driving tool, including a piston mounted in a barrel for, under the action of the combustion gases of a propulsive charge, driving a fastener for fixing a work piece on a support, means for absorbing the piston energy being provided between the barrel and a fastener guide

An indirect firing fastener driving tool, including a piston mounted in a barrel for, under the action of the combustion gases of a propulsive charge, driving a fastener for fixing a work piece on a support, means for absorbing the piston energy being provided between the barrel and a fastener guide disposed in front of the barrel, for absorbing the excess propulsion energy of the piston and limiting its stroke, the absorbing means comprising, in combination, a ring arranged for cooperating with the piston, a first intermediate ring, made from a resilient material, disposed between the ring cooperating with the piston and the fastener guide, and a scond intermediate ring, made from a rigid but slightly deformable material, movable axially between the ring cooperating with the piston and the fastener guide, characterized in that the fastener guide and the second intermediate ring are arranged so the the length of the axial displacement of this second intermediate ring is equal to the maximum reduction of the axial dimension of the first intermediate ring after compression said first and second intermediate rings being concentrically disposed relative to each other.