Patent ID: 11938603
Assignee: ILLINOIS TOOL WORKS INC.
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A gas-operated fixing tool comprising:
a working chamber;
a piston slidably mounted in the working chamber and including a driving rod having a first longitudinal end configured to drive a first fixing element and a second longitudinal end connected to a head that separates the working chamber into a first portion and into a second portion that is traversable by the driving rod;
an elastically deformable member in the first portion of the working chamber, the elastically deformable member elastically compressible by the piston during movement of the piston to a rest position and elastically expandable to cause the piston to move from the rest position to drive the first fixing element;
a combustion chamber in fluid communication with the second portion of the working chamber such that a rise in pressure in the combustion chamber due to combustion of a mixture of air and fuel in the combustion chamber causes movement and return of the piston toward the rest position such that the driving rod is ready to drive a second fixing element, wherein the combustion chamber is not in fluid communication with the first portion of the working chamber; and
a piston movement blocking element engageable with a front of the first longitudinal end of the driving rod in the rest position.