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US 12,263,568 B2Granted
Head valve system for air spring power tool
AssigneesRobert Bosch Power Tools GmbH, Basso Industry Corp.
InventorsRamon Tam, Peter Wierzchon, Chien-Kuo Po
Life of this patent
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Abstract
A power tool includes an air spring cylinder. A piston is movably positioned within the cylinder. A head valve assembly of the power tool includes a flapper valve configured to seal the air spring cylinder from an air accumulator when the flapper valve is in a non-firing position.
Claims20
A power tool, comprising:
- an air spring cylinder;
- a piston located within the air spring cylinder;
- an air accumulator;
- and
- a head valve assembly including a flapper valve configured to seal the air spring cylinder from the air accumulator when the flapper valve is in a non-firing position.
2 more elements
A method of operating a power tool, comprising:
- moving a flapper valve, of a head valve assembly, configured to seal an air spring cylinder from an air accumulator when the flapper valve is in a non-firing position, to a firing position;
- disengaging a lifter gear from a rack fixedly attached to a piston positioned in the air spring cylinder;
- and
- moving the piston within the air spring cylinder upon disengagement of the lifter gear from the rack using compressed air from the air accumulator thereby driving a fastener with a driver blade fixedly attached to the piston.
1 more element
Dependencies are inferred from the claim text.