WO2003087696A1 - A tiller, bow and trigger mechanism for a crossbow, and a crossbow - Google Patents
A tiller, bow and trigger mechanism for a crossbow, and a crossbow Download PDFInfo
- Publication number
- WO2003087696A1 WO2003087696A1 PCT/PL2002/000030 PL0200030W WO03087696A1 WO 2003087696 A1 WO2003087696 A1 WO 2003087696A1 PL 0200030 W PL0200030 W PL 0200030W WO 03087696 A1 WO03087696 A1 WO 03087696A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- bowstring
- crossbow
- bow
- limb
- limbs
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41B—WEAPONS FOR PROJECTING MISSILES WITHOUT USE OF EXPLOSIVE OR COMBUSTIBLE PROPELLANT CHARGE; WEAPONS NOT OTHERWISE PROVIDED FOR
- F41B5/00—Bows; Crossbows
- F41B5/12—Crossbows
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41B—WEAPONS FOR PROJECTING MISSILES WITHOUT USE OF EXPLOSIVE OR COMBUSTIBLE PROPELLANT CHARGE; WEAPONS NOT OTHERWISE PROVIDED FOR
- F41B5/00—Bows; Crossbows
- F41B5/14—Details of bows; Accessories for arc shooting
- F41B5/1442—Accessories for arc or bow shooting
- F41B5/1469—Bow-string drawing or releasing devices
Definitions
- the invention relates to a tiller, bow and trigger mechanism for a crossbow, and to a crossbow containing at least one of the aforementioned parts.
- Crossbows having a bow (or prod) equipped with pulleys for a bowstring mounted on a tiller provided with a butt, trigger mechanism and aiming device, cocked by means of various cocking mechanisms, have been known for long time.
- EP 0 132 017 Bl discloses a crossbow having a tiller which carries a prod and a bowstring arrestor, and having a release mechanism. Said prod is mounted for reciprocal movement relative to the tiller to facilitate cocking the bow.
- the crossbow is cocked with the use of a cocking mechanism comprising a crank lever which has one of its ends pivotally mounted to the stock by means of a stock pin and has its opposite end pivotally connected between the ends of a connecting lever by means of a crank pin.
- the "slider" of the cocking mechanism comprises a draw block to which one end of the connecting lever is mounted by means of a block pin.
- the connecting lever extends beyond the pivotal connection at the crank pin to provide a grip portion by which the cocking mechanism can be operated.
- the grip portion of the connecting lever is manipulated so that it is pushed away from the stock to pivot about the block pin. This action causes the draw block to slide along a forend tube towards an adjacent shoulder of the stock, whereby the grip and the bowstring are moved rearwardly together, as a unit.
- the crossbow stock is provided with a bowstring arrestor and release mechanism which automatically arrests the bowstring when it enters the mechanism. In this known cocking mechanism the crank lever is relatively short which limits possible maximum launch force.
- EP 0 223 797 Bl discloses a crossbow equipped with an integrated drawing device which is supposed to facilitate fast cocking of the bowstring and placing said mechanism in a position where it does not hinder handling the crossbow and shooting.
- the drawing device consists of two elements, a pusher and a draw lever rotatably mounted in a support of the crossbow to pivot about a horizontal axis transverse to the longitudinal axis of said support. Said axis is situated in the front part of a metal insert between a bow and a bowstring.
- the draw lever is provided with a longitudinally extending recess into which the pusher of lesser thickness engages and is hinged at a point of rotation at a certain distance from said axis.
- the recess is so dimensioned that it can completely receive the pusher in the inserted position of the drawing device, except for its free end.
- This free end exhibits an indentation which in the drawing operation can engage a complementary or positively formed projection of trigger slide.
- the metal insert and the adjacent front part of the support are provided with corresponding longitudinal groove sections which are so dimensioned that the drawing device when folded back into the extended (rest) position, together with the pusher in the recess of the draw lever, is completely received by the support.
- the draw lever is locked in the support by a latch provided on the front end of support, which engages in a notch on the front end of the draw lever.
- the object of this invention is to provide modular parts of a crossbow which when combined with each other or when combined with suitable elements of various known crossbows, will overcome the aforementioned problems.
- One aspect of the invention provides a tiller for a crossbow having a cocking lever in the form of an upper arm and a lower arm, said arms being pivotally connected with each other about an axis in the front part of the tiller, whereas in the rear part of the tiller said upper arm is connected with the upper end of a butt, and said lower arm is connected with the lower end of the butt in the folded state of the tiller by means of a snap fastener.
- Another aspect of the invention provides a bow for a crossbow with pulleys for a bowstring, said bow having two limbs, the first limb having on its respective ends a front pulley and a back pulley, and a second limb having on its respective ends a front pulley and a back pulley, said limbs being pivotally connected by means of bolts with a central cross-bar carrying a pre-cocking mechanism to which a bowstring is fastened, wherein the first end of the bowstring is fastened to the pre-cocking mechanism on its side facing the second limb, from where the bowstring runs to the front pulley of the first limb and then, along the diagonal of the bow, to the back pulley of the second limb, and then to the back pulley of the first limb from where it runs, along the diagonal of the bow, to the front pulley of the second limb and then to the place at which its second end is fastened, said place being situated on the pre-cocking mechanism on its side facing the first
- said bow limbs are provided at their both ends with recesses in which the pulleys are fixed and through which the bowstring runs.
- the recesses are triangular with vertices directed towards the middle of the limbs,.
- the pre-cocking mechanism is positioned centrally between the limbs, and has a body with a longitudinal slotted guide for a draw pin, said guide passing through said body in the direction of the limbs, and the ends of the bowstring are fastened on the sides of the body to the ends of the draw pin from where the bowstring runs to the front pulleys of the limbs, through a notch on the top of the body adjacent to a threaded hole for a draw screw connected with the draw pin.
- a trigger mechanism for a crossbow having a case containing a nut in the form of a cylinder with a cut-out for the bowstring and an indentation located oppositely to said cut-out and accommodating a first ball from a set of at least two locking balls positioned one on the top of the other in the case, wherein the nut is connected with an stopper which abuts a spring-loaded retainer for said stopper, and the set of locking balls includes a working ball which on its one side is co-axially adjacent to a pusher connected with a trigger, and on its opposite side is adjacent to a working element of a counterrecoil mechanism, said working element being loaded with a recoil spring.
- the trigger mechanism has the working element in the form of a ball.
- a crossbow having a cocking mechanism and a bow with pulleys for a bowstring, said bow being mounted on a tiller including a projectile guide and provided with an aiming mechanism and a trigger mechanism, characterized by having the above defined tiller of the invention as its tiller and/or the above defined bow of the invention as its bow, and/or the above defined trigger mechanism of the invention as its trigger mechanism.
- the crossbow of the invention can be assembled by combining any suitable conventional bow and any suitable conventional trigger mechanism with the tiller of the invention; or by combining any suitable conventional tiller and any suitable conventional trigger mechanism with the bow of the invention; or by combining any suitable conventional tiller and any suitable conventional bow with the trigger mechanism of the invention; or by combining any suitable conventional tiller with the bow of the invention and the trigger mechanism of the invention; or by combining any suitable conventional bow with the tiller of the invention and the trigger mechanism of the invention; or by combining any suitable conventional trigger mechanism with the tiller of the invention and the bow of the invention.
- the crossbow of the invention having the bow of the invention and/or the trigger mechanism of the invention has preferred features defined above in relation to said bow and trigger mechanism.
- the crossbow of the invention can be used for any purpose, as a hunting crossbow, for sports competitions, to put animals to sleep, as a weapon etc. It can be adapted for any projectiles, e.g. arrows, bolts, harpoons and narcotising projectiles.
- the tiller of the invention provides a cocking mechanism in the scissors-like form which allows to cock the crossbow by applying a minimal force to the end of the lower arm of the cocking lever.
- the bow Due to the modular construction of the bow it can be readily mounted on or removed from the tiller, which enables fast assembling and dismantling of the crossbow. This makes it very convenient for handling and transporting. Furthermore the structure of the bow results in the substantial reduction of the kick effect and diminishes the impact of inertial force on the person shooting the crossbow.
- the bow of the invention has a distinct advantage in that it can be up to 50 % narrower than various conventional bows, and yet it still ensures exceptionally good cocking parameters.
- the structure of the bow, and in particular its pivotal connection about the bolts, provides for considerable reduction of friction between the bowstring and the projectile guide when the bowstring is drawn.
- the trigger mechanism of the invention is sturdy but simultaneously it has a high sensitivity, and thus requires a minimal force to release the bowstring for shooting a projectile. It provides also a high safety, as the trigger mechanism is easily protected against self-release by blocking the working element (ball) of a counterrecoil mechanism.
- the structure of the modular parts of the crossbow, the tiller, bow and trigger mechanism makes it possible to assembly a compact crossbow of a small width, easy to cock with a minimal effort, yet providing a large draw force.
- the crossbow is fast-firing and allows for discharging projectiles with a high initial velocity.
- FIG. 1 is a top view of a crossbow of the invention having a tiller and bow of the invention.
- Fig. 2 is a side view of a crossbow of the invention having a tiller and bow of the invention.
- Fig. 3 is a side view of a disassembled tiller of the invention provided with a trigger portion and aiming device.
- Fig. 4 is a side view of a crossbow of the invention with its tiller open and ready for drawing a bowstring.
- Fig. 5 is a perspective view of a bow of the invention.
- Fig. 6 is a top view of a bow of the invention in its uncocked state.
- Fig. 7 is a top view of a bow of the invention in its cocked state.
- Fig 8 is a top view with a part section of a pre-cocking mechanism in a bow with a non- drawn bowstring.
- Fig. 9 is a side view of the pre-cocking mechanism of Fig. 8.
- Fig. 10 is a top view with a part section of a pre-cocking mechanism in a bow with a drawn bowstring.
- Fig. 11 is a side view of the pre-cocking mechanism of Fig. 10.
- Fig. 12 is a schematic view of a trigger mechanism of the invention at its blocked position.
- Fig. 13 is a schematic view of a trigger mechanism of Fig. 12 after the bowstring has been released.
- Fig. 1 shows a crossbow of the invention in its uncocked state with its tiller folded and snapped, as described below.
- Fig. 2, 3 and 4 show the crossbow of Fig. 1, folded, disassembled (only the tiller, aiming device and trigger portion are shown) and unfolded respectively.
- the tiller on which the bow (12) is mounted has a cocking lever in the form of two arms, an upper arm 1 and a lower arm 2, which are pivotably connected about an axis X in the front part of the tiller.
- the upper arm 1 has a projectile guide 3 which abuts a butt bracket 4 through which the upper arm 1 is connected with the butt 5 in the rear part of the tiller.
- the upper arm 1 is connected with the upper end of a butt 5, and said lower arm 2 is connected in the folded state of the tiller with the lower end of the butt 5 by means of a rear snap fastener 6.
- the rear snap fastener 6 is formed by a finger 7a on the butt 5 and a hook 7b at the end of the lower arm 2.
- a trigger mechanism 8, described with details further below, is situated between the arms
- the front snap fastener 9 consists of a finger 10a situated on the trigger mechanism 8, in its bottom part, and a hook 10b located on the lower arm 2 of the cocking lever.
- Fig. 5, 6 and 7 show the bow J_2 of the invention which can be mounted on a conventional tiller or on the tiller of the invention.
- the bow 12 is pivotably connected about an axis XI with the lower arm 2 of the cocking lever.
- the bow Y2 has two limbs 13, 14, both provided on their respective ends with front pulleys J_5a, 15b and back pulleys 16a, 16b.
- the limbs 13, 14 are pivotally connected by means of bolts 17a, 17b with a central cross-bar 8 which carries a pre-cocking mechanism J_9 to which a bowstring 20 is fastened.
- the limbs 13, 1_4 can be positioned parallelly to the shot axis, but their rotatable attachment to the central cross-bar 18 allows to deflect them in relation to the plane of shot determined by the tiller and the central cross-bar 1_8, at a small angle to the shot axis. Such a deflection is advantageous since it reduces friction of the bowstring 20 against the projectile guide 3.
- the bow 12 can be fixed to the tiller with the use of any suitable locking means, e.g. a bayonet lock (not shown).
- the bowstring 20 is fastened to a pre-cocking mechanism J_9 and guided by the pulleys 15a, 15b, 16a, 16b.
- the first end of the bowstring 20 is fastened to the pre-cocking mechanism 19 on its side facing the second limb 14.
- the bowstring 20 runs to the front pulley J_5a of the first limb 13 and then, along the diagonal of the bow 12, to the back pulley 16b of the second limb 1_4, and then to the back pulley 16a of the first limb J_3 from where it runs, along the diagonal of the bow 12, to the front pulley 15b of the second limb 14 and then to the place at which its second end is fastened, said place being situated on the pre-cocking mechanism !_9 on its side facing the first limb 13.
- the limbs 13, 1_4 of the bow 1_2 are provided with recesses 21, advantageously of substantially triangular shape with vertices directed to the middle of the limbs.
- the pulleys !_5a, 15b, 16a, 16b are mounted on their axles in the recesses 2 and the bowstring 20 passes through said recesses.
- the bow 12 is provided with a pre-cocking mechanism, in a preferred embodiment designed as shown in Fig. 8 - 11.
- the pre-cocking mechanism 19 is positioned centrally between the limbs 13, 14. It has a body 22 with a longitudinal slotted guide 23 for a draw pin 24.
- the guide 23 passes through said body 22 and has its respective outlets facing the limbs 13, 14.
- the ends of the bowstring 20 are fastened on the sides of the body 22 to the ends of the draw pin 24. From these fixation sites the bowstring 20 runs to the front pulleys 15a, 16a of the limbs 13, 1_4 through a notch 25 on the top of the body 22 adjacent to a threaded hole for a draw screw 26 connected with the draw pin 24.
- the slotted guide 23 and the threaded hole for the draw screw 26 are situated diagonally in relation to the longitudinal axis of the body 22.
- Fig. 12 and 13 show a trigger mechanism of the invention with the bowstring 20 arrested and released respectively.
- the trigger mechanism 8 has a case 27 containing a nut 28 in the form of a cylinder with a cut-out 29 for the bowstring 20, and an indentation 30 located oppositely to said cut-out 29 and accommodating a first ball 3J_ from a set of at least two locking balls 3_1 positioned one on the top of the other in the case 27.
- the indentation 30 is shown as spherical, yet it can have a form of any cut-out able to accommodate the first ball 3L
- the nut 28 is connected with an stopper 32 which forces the return of the nut 28 to its pre-shot position in which the bowstring 20 can be introduced into the nut 28 through the slot 39 in the case 27 of the trigger mechanism.
- the stopper 32 abuts a spring-loaded retainer 33 of the stopper 32.
- the set of locking balls 3J_ includes a working ball 34 which on its one side is co-axially adjacent to a pusher 35 connected with a trigger 36, and on its opposite side is adjacent to a working element 37 of a counterrecoil mechanism, said working element 37 being loaded with a recoil spring 38.
- the working element 37 is a ball.
- the bow 1_2 with the bowstring 20 pre-drawn by means of the pre-cocking mechanism 19 is mounted on the tiller.
- the bowstring 20 To shot the crossbow the bowstring 20 must be fully drawn.
- the rear snap fastener 6 and the front snap fastener 9 are opened and the lower arm 2 is turned in relation to the upper arm 1 about the axis X, which simultaneously causes certain pivotal movement about the axis XI and shifts the bow J_2 towards the trigger mechanism 8.
- This combined displacement of the bow 12 shifts the bowstring 20 along the projectile guide 3 towards the trigger mechanism 8 and introduces the bowstring 20 through the slot 39 in the case 27 into the cut-out 29 in the nut 28.
- a final draw to the bowstring 20 is applied by folding the tiller, i.e. by turning the lower arm 2 of the cocking lever back till the front snap fastener 9 and the rear snap fastener 6 are both snapped.
- the crossbow is ready to be shot.
- the trigger 36 is pulled, the set of locking balls 3 . becomes destabilized since the pusher 35 pushes out one of the balls 3J_ which acts as a working ball 34.
- the working ball 34 pushes the working element 37 of a counterrecoil mechanism which is loaded with the recoil spring 38.
- the draw force of the bowstring 20 turns the nut 28 by about 60° to the left till its rotation is stopped by the stopper 32.
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- General Engineering & Computer Science (AREA)
- Pulleys (AREA)
- Jib Cranes (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
- Medicines Containing Material From Animals Or Micro-Organisms (AREA)
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Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/PL2002/000030 WO2003087696A1 (en) | 2002-04-12 | 2002-04-12 | A tiller, bow and trigger mechanism for a crossbow, and a crossbow |
AT02807222T ATE366401T1 (en) | 2002-04-12 | 2002-04-12 | CROSSBOW STOCK AND TRIGGER MECHANISM, AND CROSSBOW |
CA2481600A CA2481600C (en) | 2002-04-12 | 2002-04-12 | A tiller and bow for a crossbow, and a crossbow |
US10/511,118 US7204242B2 (en) | 2002-04-12 | 2002-04-12 | Tiller, bow and trigger mechanism for a crossbow, and a crossbow |
DE60221049T DE60221049T2 (en) | 2002-04-12 | 2002-04-12 | ARMBRUSTSCHAFT, ARMBRUSTBOGEN AND ARMBRUST |
AU2002367866A AU2002367866A1 (en) | 2002-04-12 | 2002-04-12 | A tiller, bow and trigger mechanism for a crossbow, and a crossbow |
EP02807222A EP1495278B1 (en) | 2002-04-12 | 2002-04-12 | A tiller, bow and trigger mechanism for a crossbow, and a crossbow |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/PL2002/000030 WO2003087696A1 (en) | 2002-04-12 | 2002-04-12 | A tiller, bow and trigger mechanism for a crossbow, and a crossbow |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003087696A1 true WO2003087696A1 (en) | 2003-10-23 |
Family
ID=29245102
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/PL2002/000030 WO2003087696A1 (en) | 2002-04-12 | 2002-04-12 | A tiller, bow and trigger mechanism for a crossbow, and a crossbow |
Country Status (7)
Country | Link |
---|---|
US (1) | US7204242B2 (en) |
EP (1) | EP1495278B1 (en) |
AT (1) | ATE366401T1 (en) |
AU (1) | AU2002367866A1 (en) |
CA (1) | CA2481600C (en) |
DE (1) | DE60221049T2 (en) |
WO (1) | WO2003087696A1 (en) |
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WO2000043724A1 (en) * | 1999-01-23 | 2000-07-27 | Dolcan Limited | Crossbows |
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US3783852A (en) * | 1972-09-28 | 1974-01-08 | R Shepherd | Elastic type arrow projecting gun |
US4942861A (en) * | 1985-09-20 | 1990-07-24 | Bozek John W | Cross bow with improved cocking mechanism |
US5215069A (en) * | 1992-01-29 | 1993-06-01 | Liu Cha Chang | Cross bow having a safety device |
-
2002
- 2002-04-12 AT AT02807222T patent/ATE366401T1/en not_active IP Right Cessation
- 2002-04-12 DE DE60221049T patent/DE60221049T2/en not_active Expired - Fee Related
- 2002-04-12 CA CA2481600A patent/CA2481600C/en not_active Expired - Lifetime
- 2002-04-12 US US10/511,118 patent/US7204242B2/en not_active Expired - Lifetime
- 2002-04-12 EP EP02807222A patent/EP1495278B1/en not_active Expired - Lifetime
- 2002-04-12 WO PCT/PL2002/000030 patent/WO2003087696A1/en active IP Right Grant
- 2002-04-12 AU AU2002367866A patent/AU2002367866A1/en not_active Abandoned
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US3670711A (en) * | 1971-02-22 | 1972-06-20 | Max Firestone | Crossbow cocking device |
EP0132017B1 (en) | 1983-03-04 | 1991-08-07 | Oakwood Sport and Survival Limited | Crossbow |
GB2158726A (en) * | 1984-05-14 | 1985-11-20 | Barnett Int Inc | Crossbow trigger apparatus |
US4667649A (en) * | 1985-05-20 | 1987-05-26 | Humphrey Stanley A | Archery bow |
EP0223797B1 (en) | 1985-06-01 | 1990-08-08 | SCHALLBERGER, Werner | Crossbow |
US4722317A (en) * | 1986-10-20 | 1988-02-02 | Hartwig Jim L | Archery bow |
US4711228A (en) * | 1987-01-12 | 1987-12-08 | Gillespie Noah N | Vertical cross bow and removable stock assembly therefor |
US4976250A (en) * | 1988-12-02 | 1990-12-11 | J.L.J. Manufacturing, Inc. | Adjustable compound bow |
US5685286A (en) * | 1995-02-28 | 1997-11-11 | Summers; Gregory E. | Bowstring release devices |
US5566664A (en) * | 1995-05-04 | 1996-10-22 | Todd; Gary J. | Bow string release with roller string retention members |
WO2000043724A1 (en) * | 1999-01-23 | 2000-07-27 | Dolcan Limited | Crossbows |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011141771A1 (en) * | 2010-05-12 | 2011-11-17 | Nec Plus Ultra S.R.L. | Device for launching a projectile or a launch object in general |
WO2016048180A1 (en) | 2014-09-25 | 2016-03-31 | Marcin Dziekan | Bow for a crossbow |
US10018443B2 (en) | 2014-09-25 | 2018-07-10 | Marcin Dziekan | Bow for a crossbow |
CN107796264A (en) * | 2016-09-02 | 2018-03-13 | 保联企业股份有限公司 | Roll over the string pulling device of bow |
EP3324145A1 (en) * | 2016-11-21 | 2018-05-23 | Poe Lang Enterprise Co., Ltd. | Spanning device for crossbows |
Also Published As
Publication number | Publication date |
---|---|
CA2481600A1 (en) | 2003-10-23 |
US7204242B2 (en) | 2007-04-17 |
EP1495278A1 (en) | 2005-01-12 |
DE60221049T2 (en) | 2008-03-06 |
DE60221049D1 (en) | 2007-08-16 |
CA2481600C (en) | 2010-06-22 |
US20050279338A1 (en) | 2005-12-22 |
ATE366401T1 (en) | 2007-07-15 |
AU2002367866A1 (en) | 2003-10-27 |
EP1495278B1 (en) | 2007-07-04 |
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