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US 6,640,479 B2Granted
Hammer release apparatus
AssigneeHeckler & Koch GmbH
InventorsManfred Gühring, Rudi Beckmann
Life of this patent
Estimating the term…
Abstract
A hammer release apparatus for a hand held firearm which reduces the force required to discharge the firearm is disclosed which includes a hammer, a pivotably mounted trigger, and a restraining lever. The restraining lever engages the cocked hammer which is biased towards a firing position by a hammer spring. The restraining lever counteracts the force of the hammer spring to reduce the pull resistance associated with the trigger of the firearm.
Claims13
For use with a firearm, a hammer release apparatus comprising:
- a pivotably mounted hammer including a stop notch and a projection;
- a hammer spring operably connected to the hammer for generating a rotational force biasing the hammer from a cocked position toward a firing position;
- a pivotably mounted trigger having an engagement nose disposed at one end;
- a trigger spring operably coupled to the trigger for biasing the trigger to a rest position, the trigger being actuatable against a force of the trigger spring from a rest position into a depressed position;
- a pivotably mounted trigger lever having one end disposed to engage the stop notch of the hammer, and an opposed end disposed to engage the trigger engagement nose;
- a pivotably mounted restraining apparatus having a catch disposed to restrainingly engage the projection of the hammer, the restraining apparatus shiftable between a first position in which only the trigger lever engages the hammer in the cocked position, creating a first pull resistance, and a second position in which the restraining apparatus and the trigger lever simultaneously engage the hammer in the cocked position, creating a second pull resistance lesser than the first pull resistance;
- and
- a restraining spring operably connected to the restraining apparatus and generating a force counter to the rotational force of the hammer spring.
5 more elements
For use with a firearm, a hammer release apparatus comprising:
- a pivotably mounted hammer including a stop notch, and a projection;
- a pivotably mounted trigger having an engagement nose disposed at one end;
- a hammer spring operably connected to the hammer for generating a rotational force biasing the hammer from a cocked position toward a firing position the hammer spring producing at least a portion of a pull resistance associated with the trigger;
- a trigger spring operably coupled to the trigger for biasing the trigger to a rest position, the trigger being actuatable against a force of the trigger spring from a rest position into a depressed position;
- a pivotably mounted trigger lever having one end disposed to engage the stop notch of the hammer, and an opposed end disposed to engage the trigger engagement nose;
- a pivotably mounted restraining apparatus having a catch disposed to restrainingly engage the projection of the hammer, the restraining apparatus shiftable between a first position in which only the trigger lever engages the hammer in the cocked position, and a second position in which the restraining apparatus and the trigger lever simultaneously engage the hammer in the cocked position;
- and
- a restraining spring operably connected to the restraining apparatus and generating a force counter to the rotational force of the hammer spring to reduce the pull resistance when the restraining apparatus is in the second position.
5 more elements
Dependencies are inferred from the claim text.