Cocking mechanism for crossbow

• US 4,719,897 A
• Filed: 04/24/1986
• Issued: 01/19/1988
• Est. Priority Date: 04/24/1986
• Status: Expired due to Fees

• Current Assignee: Jacques Gaudreau
• Original Assignee: Jacques Gaudreau
• Inventors: Gaudreau, Jacques
• Primary Examiner(s): Dorner, Kenneth J.
• Assistant Examiner(s): Cuomo, Peter M.
• Application Number:
  US06/855,386
• Time in Patent Office: 635 Days
• Field of Search: 124/25, 124/31, 124/37, 124/35 R, 124/22, 124/21, 124/35 A, 124/24 R, 124/23 R, 124/80, 124/16, 124/26
• US Class Current: 124/25
• CPC Class Codes: F41B 5/14 Details of bows; Accessories for arc shooting sighting devices for bows F41G1/467
• CPC Class Codes: F41B 5/1469 Bow-string drawing or releasing devices F41B5/1473 takes precedence

Abstract

The crossbow has an elongated frame formed at one end with a stock containing a triggering mechanism including a trigger and a latch. The other end of the crossbow is a barrel which includes a slide to mount an arrow. A bow and string combination is disposed on the barrel at the front part thereof to be associated with the slide. The cocking mechanism comprises a sliding channel formed in the barrel, whose rearward end extends to the triggering mechanism and is in open communication therewith. A string engaging member is slidably disposed in the channel and has a hooking device thereon to engage the string. The string engaging member is arranged to engage the string while the latter is in released position and to slide in the channel with the string hooked thereto until the latter is in cocked position and becomes engaged by the latch. A spring or the like then retracts the string engaging member at the forward end of the channel. This cocking mechanism requires less strength to operate than other known devices and is much easier and cheaper to manufacture.

Claims

1. A cocking mechanism for a crossbow, said crossbow including an elongated frame formed at one end with a stock containing a triggering mechanism including a trigger and a latch member and a barrel member at the other end, said barrel having a front part and a rear part, said barrel member including a slide to mount an arrow, and a bow and string combination disposed on said barrel at the front part thereof and associated with said slide, said cocking mechanism comprising

a sliding channel formed in said barrel, said sliding channel being rectangular and having a forward end and a rearward end, said rearward end extending to said triggering mechanism in open communication therewith,

a string engaging member slidably disposed in said channel, said string engaging member comprises a U-shaped device having a flat bottom and upstanding side walls, each upstanding side wall formed with a hook near the upper end thereof facing said rearward end of said channel, said hook being engageable with said string, said rectangular channel having a depression formed therein at said forward end thereof so that when said U-shaped device is at the forward end of said rectangular channel it sits therein at a lower level than when it slides in said channel toward said triggeringmechanism, thereby preventing said U-shaped device including said hooks from obstructing said arrow upon release thereof,

said slide is disposed in said channel, said U-shaped device is adapted to travel between the bottom of said channel and said slide, said slide comprising a pair of flanges at the forward end of said channel, said flanges terminating in upwardly inclined steps, an inclined ramp formed in said channel to connect said depression to the bottom of said channel so that when pulling said U-shaped device toward said triggering mechanism, said U-shaped device will rise by riding on said ramp and said hooks will rest against said flanges until reaching said upwardly inclined steps when they engage said string,

2. A cocking mechanism according to claim 1, which comprises a recess formed in said stock to receive said triggering mechanism, said trigger comprising a first pivot member articulated at one end thereof and formed with a catch, and a first spring member disposed between said pivot member and the wall of said recess to urge said trigger in engagement with said latch by means of said catch, said latch comprising a second pivot member articulated near one end thereof, said second pivot member formed with a tip at the other end thereof to be engaged by said catch, said one end of said second pivot member being formed with a first wing member and a second wing member, both defining a jaw, and a second spring member disposed between said second pivot member and the wall of said recess to urge said latch in releasing said string upon acting on said trigger, said first wing member adapted to engage said string in cocked position thereof and said second wing member adapted to cause articulation of said second pivot member upon being forced by said string engaging member, so that said tip becomes engaged by said catch.

3. A cooking mechanism according to claim 1, wherein each said upstanding wall is formed with a partial extension having a front edge and a rear edge, said hook being formed on said rear edge, a spring provided for each partial extension, each spring being connected between the forward end of said sliding channel and the front edge of said partial extension, said springs to constitute said resilient means.

4. A cocking mechanism according to claim 1, which comprises a cocking lever pivoted at one end rearwardly of said barrel and disposed therebelow, a handle at the opposite end of said cocking lever and a lower channel to receive said cocking lever in non-operative position of the latter, a cable operatively connecting said U-shaped device to said cocking lever, and pulley means for winding said cable when cocking said lever.

5. A cocking mechanism according to claim 4, wherein said cable is attached to said flat bottom of said U-shaped device.

6. A cocking mechanism according to claim 4, wherein said cocking lever is pivoted at said one end at the rear end of said barrel.

7. A cocking mechanism according to claim 6, wherein said cable is attached at one end on said cocking lever at one point between said one end and said handle, said cable being attached at the other end on said U-shaped device, said cable winding around two freely rotatable pulleys, one pulley being mounted in said barrel at a lower level and opposite said one point of said cocking lever, a second pulley being mounted in said barrel at a higher level and opposite said trigger mechanism, so that said cable from said one point first winds around said one pulley to thereafter be directed towards said second pulley and wind around same, after which it is directed toward said string engaging member.

8. A cocking mechanism according to claim 6, wherein said cable is attached at one end on said barrel interiorly thereof and at the other end to said flat bottom of said U-shaped device, said cable winding around three freely rotatable pulleys, one pulley being mounted in said barrel at a lower level and ahead of a point where said one end of said cocking lever is pivoted at the rear end of said barrel, a second pulley mounted in said barrel at a higher level and opposite and closer to said trigger mechanism, a third pulley mounted on said cocking lever ahead of said first and second pulleys so that said cable winds around said three pulleys and when said cocking lever is pulled down said string engaging member hooks into said string to bring the latter into cocking position.

9. A cocking mechanism according to claim 4, wherein said cocking lever is pivoted at said one end on said stock rearwardly of said triggering mechanism.

10. A cocking mechanism according to claim 9, wherein said cable is attached at one end on said cocking lever at one point between said one end and said handle, said cable being attached at the other end on said U-shaped device, said cable winding around two freely rotatable pulleys, one pulley being mounted in said barrel at a lower level and opposite said one point of said cocking lever, a second pulley being mounted in said barrel at a higher level and above said first pulley, so that said cable from said one point first winds around said first pulley to thereafter be directed toward said second pulley and wind around same, after which it is directed toward said string engaging member.

11. A cocking mechanism according to claim 9, wherein said cable comprises a first part and a second part, said first part being attached at one end on said cocking lever at one point between said one end of said cocking lever and said handle, said second part being attached at one end on said U-shaped device, a first freely rotatable pulley mounted in said barrel at a higher level and opposite point of attachment of said first part on said cocking lever, a second pulley of smaller radius than said first freely rotatable pulley, said second pulley being eccentrically fixed to said first pulley, the other end of said first cable part being attached to said second pulley to wind therearound, and the other end of said second cable part being attached to said first pulley to wind therearound, so that when cocking said lever, said first cable part will cause leverage rotation of said second pulley as a result of the fact that it is eccentrically mounted on said first pulley to rotate said first pulley and draw said U-shaped device toward said triggering mechanism until said crossbow is cocked.