Bow drawback mechanism

• US 4,603,676 A
• Filed: 04/17/1984
• Issued: 08/05/1986
• Est. Priority Date: 04/17/1984
• Status: Expired due to Fees

• Current Assignee: Eugene H. Luoma
• Original Assignee: Eugene H. Luoma
• Inventors: Luoma, Eugene H.
• Primary Examiner(s): Pinkham, Richard C.
• Assistant Examiner(s): Layno, Benjamin
• Application Number:
  US06/601,231
• Time in Patent Office: 840 Days
• Field of Search: 124/23 R, 124/24 R, 124/41, 124/22, 124/35 A, 124/35 R, 124/25, 124/67, 124/37, 222/391
• US Class Current: 124/25
• CPC Class Codes: F41B 5/123 Compound crossbows
• CPC Class Codes: F41B 5/1469 Bow-string drawing or releasing devices F41B5/1473 takes precedence

Abstract

A crossbow having a bow prod with a string attached to its opposite ends, engageable by a releasable catch for holding the string at a cocked position spaced rearwardly from the bow prod. The releasable catch is mounted to a cocking mechanism that is slidably movable along a rod, the fore end portion of which is connected to the midsection of the bow prod. The cocking mechanism, when adjacent to the fore end portion of the rod, permits the bowstring to be drawn back by means of a mechanical leverage advantage obtained from the cocking mechanism.

Claims

1. In a bow having a bow prod, and a bow string coupled to the ends of said prod, an elongated rod fixedly mounted at its forward end to the center of said prod and extending rearwardly from said prod, and a cocking mechanism including a housing mounted on said rod for movement longitudinally of said rod, said mechanism including trigger means operable to releasably couple said string to said housing;

the improvement wherein said cocking mechanism further comprises a cocking plate and a lock lever each having a rod-receiving aperture therethrough dimensioned to accommodate longitudinal sliding movement of said rod relative to the plate and lock lever when the plate and lock lever are disposed perpendicular to the longitudinal axis of said rod and to lock said plate and lock lever to said rod to prevent longitudinal sliding movement of said rod relative thereto when tilted relative to the rod axis, first abutment means in said housing establishing a normal rest position of said cocking plate wherein said cocking plate is perpendicular to the axis of said rod, an actuating lever pivotally mounted in said housing for pivotal movement between a normal position and an actuated position, said actuating lever being engaged with the rearward side of said cocking plate and being operable upon movement from said normal position to said actuated position to tilt said cocking plate into locked engagement with said rod and to urge said cocking mechanism through one step of movement rearwardly relative to said rod and away from said bow prod, second abutment means in said housing establishing a normal rest position of said lock lever wherein said lock lever is tilted into locked engagement with said rod to prevent movement of said cocking mechanism relative to said rod, said second abutment means accommodating movement of said lock lever into perpendicular relation with said rod axis upon rearward movement of said cocking mechanism relative to said rod initiated by movement of said actuating lever into its actuated position and return of said locking lever to its normal rest position to prevent forward movement of said cocking mechanism relative to said rod whereby said cocking mechanism may be advanced rearwardly relative to said rod in step by step movement by successive movements of said actuating lever from its normal to its actuated position and further comprising;

lock button means operable to lock said lock lever in its normal rest position.

2. The invention defined in claim 1 further comprising release button means in said housing operable to maintain said lock lever in perpendicular relationship to said rod axis to accommodate free sliding movement of said cocking mechanism relative to said rod to enable the initial coupling of said trigger means to said bow string.