Fastener driving tool having pressurized power source
AssigneeIlinois Tool Works Inc.
InventorMarc Largo
Life of this patent
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Abstract
A fastener driving tool is disclosed having a self contained pre-pressurized pneumatic power source. Operator actuation of a trigger mechanism causes a pressurized medium supplied by the self contained pre-pressurized power source to flow through a valve and to propel a piston connected to a driver blade towards a nosepiece assembly end of the tool. The flow of the pressurized medium through the valve further recoils a spring-biased activating bolt which resets the trigger mechanism.
Claims17
A portable pneumatic power tool having a fastener feed source to supply collated fasteners to a nose piece assembly end of the tool for impacting into a workpiece, comprising:
- a housing having a cavity with a housing port adjacent one end;
- a self contained pre-pressurized power delivery source;
- and
- a reciprocating driver blade at least partially positioned within the housing and driven by the self-contained pre-pressurized power delivery source;
- and
- a trigger mechanism connected to said housing and including a valve configured for enabling at least a portion of the delivery source to power said driver blade;
- wherein said valve is configured for being actuated by a valve opening member upon actuation of said trigger mechanism, said valve opening member having a piston reciprocal in said cavity and a seal encircling at least a portion of said piston, said valve opening member configured for preventing unwanted flow of at least a portion of the delivery source toward said housing port in said cavity upon an actuation of said trigger mechanism.
A trigger mechanism for a fastener driving tool having a self contained pre-pressurized power source and a magazine for storing and sequentially urging fasteners toward a nosepiece assembly through which a driver blade travels to impact and drive the fasteners into a workpiece, the trigger mechanism comprising:
- a valve-opening member including a piston reciprocal in a cavity and a seal encircling at least a portion of said piston;
- a trigger configured to hold said valve opening member in a set position until actuation of said trigger;
- and
- a valve configured for being opened and closed by reciprocation of said valve opening member, wherein said valve controls a flow of a pressurized medium from the self contained pre-pressurized power source;
- wherein said seal prevents the flow of the pressurized medium from passing through said bore upon actuation of said trigger mechanism for powering said driver blade.
A portable pneumatic power tool having a fastener feed source to supply collated fasteners to a nose piece assembly end of the tool for impacting into a workpiece, comprising:
- a housing having a sealed chamber sealed by a valve and configured for receiving a self contained pre-pressurized power delivery source filling said sealed chamber;
- a reciprocating driver blade at least partially positioned within the housing and driven by the delivery source upon an opening of said valve;
- and
- a trigger mechanism connected to said housing configured for preventing the passage of said at least a portion of said source from said sealed chamber prior to actuation of said trigger mechanism and powering said driver blade;
- wherein said valve is opened by actuation of a valve opening member upon actuation of said trigger mechanism.
Dependencies are inferred from the claim text.