Crossbow trigger mechanism
First Claim
1. A crossbow trigger mechanism for alternatively holding of a crossbow string in cocked position and release thereof comprisingstring holding cylinder means releasably engageable with a crossbow string and pivotably supported for rotation about its pivot axis between a first position for holding a string in cocked position when engaged therewith and a second position where a string is released from such engagement, and said string holding cylinder means being adapted to be rotated in response to movement of a crossbow string after the latter is released from its cocked positiontrigger lever means pivotably supported for rotation about its pivot axis between a latch position in mechanical engagement with said cylinder means for maintenance of said holding cylinder means in said first position and an unlatched position enabling said cylinder means to revolve toward said second position,locking lever means pivotably mounted on said frame for rotation about its pivot axis between a locked position in mechanical engagement with said trigger lever means to prevent rotation of said trigger lever means out of latching engagement with said cylinder means and an unlocked position permitting rotation of said trigger lever means to said unlatch position, said locking lever means, when in said unlocked position, adapted to be engaged by said cylinder means during revolution of said cylinder means to said string releasing position and rotated by said cylinder means in a direction toward the locked position of said locking lever means, andbiasing means connected with said locking lever means for biasing of said locking lever means to either its locked or unlocked positions.
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Accused Products
Abstract
A crossbow trigger mechanism is provided having three mechanically operable lever elements designated as a string holding cylinder, trigger lever and a locking lever. These three lever elements are mounted for pivotable rotation in a substantially common plane about parallel axes. Their axes are relatively positioned such that a mechanical interlock is formed between the cylinder and trigger lever when the cylinder is in a string holding position to prevent release of a string and between the trigger lever and locking lever when the locking lever is in a locking position with respect to the trigger lever to prevent the trigger lever from being moved. A torsion spring is provided and interconnected between the locking lever and trigger lever to provide a biasing force for rotation of the locking lever in either direction dependent upon whether the lever is in a locked position or an unlocked position. The cylinder and locking lever are positioned and mutually configured to cooperatively interengage during rotation of the cylinder in release of a bowstring to initiate return of the locking lever to its locked position. The torsion spring completes return of the locking lever to its locked position when a bowstring is again placed in restrained relationship on the string holding cylinder or by revolving the cylinder to its string holding position as an automatic consequence of that cocking operation.
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Citations
21 Claims
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1. A crossbow trigger mechanism for alternatively holding of a crossbow string in cocked position and release thereof comprising
string holding cylinder means releasably engageable with a crossbow string and pivotably supported for rotation about its pivot axis between a first position for holding a string in cocked position when engaged therewith and a second position where a string is released from such engagement, and said string holding cylinder means being adapted to be rotated in response to movement of a crossbow string after the latter is released from its cocked position trigger lever means pivotably supported for rotation about its pivot axis between a latch position in mechanical engagement with said cylinder means for maintenance of said holding cylinder means in said first position and an unlatched position enabling said cylinder means to revolve toward said second position, locking lever means pivotably mounted on said frame for rotation about its pivot axis between a locked position in mechanical engagement with said trigger lever means to prevent rotation of said trigger lever means out of latching engagement with said cylinder means and an unlocked position permitting rotation of said trigger lever means to said unlatch position, said locking lever means, when in said unlocked position, adapted to be engaged by said cylinder means during revolution of said cylinder means to said string releasing position and rotated by said cylinder means in a direction toward the locked position of said locking lever means, and biasing means connected with said locking lever means for biasing of said locking lever means to either its locked or unlocked positions.
Specification