CN105492857A

CN105492857A - Elastic projectile propulsion systems and methods

Info

Publication number: CN105492857A
Application number: CN201480046013.0A
Authority: CN
Inventors: 强纳森·C·波兰尼; 詹姆士·T·庞德
Original assignee: Serpent Rural Sports LLC
Current assignee: Serpent Rural Sports LLC
Priority date: 2013-08-19
Filing date: 2014-08-18
Publication date: 2016-04-13
Also published as: US20160161209A1; WO2015026702A1; US20150354916A1; CA2920367A1

Abstract

An elastic projectile propulsion system deploys a plurality of springs that bias a common launching cord via a plurality of block and tackle pulleys. Each sheave of the pulley is coupled to the moveable end of a spring such that the force of each spring contributes to the energy imparted to a projectile by the launching cord without adding significant friction or inertial resistance.

Description

Elasticity projectile propulsion system and method

Technical field

Cross reference

Subject application advocates that the title submitted on August 19th, 2013 is the 61/867th of " elasticity projectile propulsion system (ELASTICPROJECTILEPROPULSIONSYSTEM) " the, No. 383 and the title submitted on March 1st, 2014 are the 61/946th of " elasticity projection propulsion system (ELASTICPROJECTIVEPROPULSIONSYSTEM) " the, the rights and interests of No. 736 U.S. Provisional Application cases, described application case is incorporated herein by reference.

The present invention relates to the elastic energy of allotment storage to advance the compact propulsion system of projectile, and relate to the compact propulsion system for launching arrow and other flight projectile or rather.

Background technology

The existing method of launching arrow and other projectile allocates the elastic energy be stored in spring (such as, the leaf spring in bow, torsionspring and helical spring, rubber tube and band), and is stored in the elastic energy in the transmitting rope of stretching.The various combinations of these elements are known, and wherein some are included in the path of wriggling substantially a series of pulleys extending and guide transmitting rope.Such as, see the United States Patent (USP) 2,515,205A about the catapult-launching gear (CatapultDeviceforLaunchingAerialMachines) for launch craft authorizing Fieux that July 18 nineteen fifty promulgates.

But existing system has restriction.Although metal spring is more reliable compared with rubber spring in series of temperature, the heavier quality of metal spring imposes speed restriction.

Bow system is not compact (usually having at least 12 inches (30.48 centimetres) or larger width at the widest some place), and need larger loading force (cross bow has the pull weight of 125-2001bs (56.7-90.72 kilogram) usually), this overcomes by adding heavy, huge and the lever of complexity and ratchet, thereby increases size and the weight of device.

In addition, be limited in the ability that bow system is bent without the need to sustaining damage reuptaking the energy of storage during launching.Therefore, bow system needs the tractive force minimum arrow weight of mating pro rata with bow, so that away from bending dissipation energy and guaranteeing functional and damage without the need to causing bow system during launching.The professional standard of extensive employing recommends bow to be never deployed as transmitting (" doing fire ") when not having arrow, and arranges the minimum rate of arrow weight and tractive force, this forced speed restriction then.

Device disclosed herein provides the propelling that can overcome above restriction configuration.

Summary of the invention

One aspect of the present invention provides a kind of propulsion plant, and described propulsion plant comprises: the elongated cartridge unit of rigidity, and it has front portion (far-end) emission end and relative (near-end) bracket connecting end portion; A pair front portion (far-end) spring members, each being mounted to connects on the opposite flank of the cylinder of contiguous anterior (far-end) emission end at its far-end, and each front portion (far-end) spring has the far-end being connected to the cylinder relative with removable near-end; A pair rear portion (near-end) spring members, each being mounted to is connected to cylinder in its proximal end on the opposite flank of the cylinder of located adjacent proximal end carriage end; A pair removable front pulleys group, it is couple to near-end movable end and the removable assembly pulley of at least one near-end of each front springs parts separately, is connected to the far-end movable end of each Rear springs parts; Launch rope, it has each in opposed end and on the opposite flank of cylinder, engages far-end and removable both the assembly pulleys of near-end to provide a pair moveable reaction assembly pulley pulley to couple the elastic energy be stored in far-end and near-end spring members when the proximal direction of the bracket connecting end portion towards cylinder is pulled launching rope center.The assembly be made up of elastomeric material is resilient and allows assembly to spring back to after deformation force removes in predetermined shape.

A second aspect of the present invention provides a kind of method advancing the projectile of such as arrow.Said method comprising the steps of: propulsion plant is provided; There is provided projectile, described projectile has (far-end) end, front portion and the rear portion relative with forward end (near-end) end; Projectile is shelved on cylinder to be engaged on the center of the transmitting rope of rear portion (near-end) end of projectile; Be engaged on the transmitting rope in contiguous removable assembly pulley with tension in the center of (near-end) direction overhanging cable backward and the projectile of attachment, the removable assembly pulley of described vicinity is attached to far-end and near-end spring members on two opposite flanks of cylinder, and then stretches each in far-end and near-end spring members toward each other; Release launch rope and projectile with provide from back-moving spring and launch rope to energy mutual of projectile and while transmission.Alternatively, the linear projectile of such as arrow can be fastened in device after transmitting rope is strained completely, and afterwards, user discharges traction on projectile (such as, by pulls trigger, discharge and launch rope etc.), this makes energy be delivered to projectile from the spring of tension and transmitting rope.

One aspect of the present invention relates to propulsion plant.Suitable propulsion plant comprises: a) elongated cartridge unit, and it forms the chamber with elongated cartridge unit near-end and elongated cartridge unit far-end, wherein elongated cartridge unit near-end engagement installation bracket; B) a pair front springs parts, it has front springs member proximal end and front springs distal end separately, described right front springs parts are placed in the chamber of elongated cartridge unit, and wherein the far-end of front springs parts is connected to corresponding movable supporting frame and the near-end of front springs parts is connected to removable assembly pulley; C) a pair Rear springs parts, each have Rear springs member proximal end and Rear springs distal end, described right Rear springs parts are placed in the chamber of elongated cartridge unit, and wherein the far-end of Rear springs parts is connected to removable assembly pulley and the near-end of Rear springs parts is connected to corresponding movable supporting frame; D) at least one pair of front pulleys, each front pulleys is couple to front springs member proximal end and at least one rear pulleys, is connected to the far-end of each Rear springs parts; And e) launch rope, it has first end and the second end, described first end and the second end can any one place's attachment in the removable assembly pulley of the removable assembly pulley in front portion or rear portion and the path of wriggling of crossing around pulley to engage both front pulleys and rear pulleys.In at least some configuration, described right front pulleys and described rear pulleys can be configured to and comprise reaction assembly pulley pulley, when launching the bracket connecting end portion of rope towards cylinder by the elastic energy be stored in reaction assembly pulley pulley couplings described during rear haulage in front springs parts and Rear springs parts.In addition, track can be provided and track is positioned at the inside of cartridge unit.Described track also can be configurablely keep flatly static with vertically mobile simultaneously.In addition, firing lock and/or trigger sub-assembly can be provided.Propulsion plant is configurable to make them have 12 inches or less width.In some configurations, launch rope and be wound around more than three times or three times around distal pulley wheels.In addition, front springs parts combine with parallel group with Rear springs parts, wherein each group of one or more assembly pulley movably of engagement.

Another aspect of the present invention relates to linear archery system.Described linear archery system comprises: a) elongated cartridge unit, and it forms the chamber with elongated cartridge unit near-end and elongated cartridge unit far-end, wherein elongated cartridge unit near-end engagement installation bracket; B) one or more front springs parts, each in described one or more front springs parts has front springs member proximal end and front springs distal end, described one or more front springs parts are placed in the chamber of elongated cartridge unit, and the far-end of wherein said one or more front springs parts is connected to movable supporting frame and the near-end of described front springs parts is connected to removable assembly pulley; C) one or more Rear springs parts, each in described one or more Rear springs parts has Rear springs member proximal end and Rear springs distal end, described one or more Rear springs parts are placed in the chamber of elongated cartridge unit, and the far-end of wherein said one or more Rear springs parts is connected to removable assembly pulley and the near-end of Rear springs parts is connected to corresponding movable supporting frame; D) one or more front pulleys, each in described one or more front pulleys is couple at least one and at least one rear pulleys in one or more front springs member proximal end, is connected to the far-end of Rear springs parts; And e) launch rope, it has first end and the second end, described first end and the second end can any one place's attachment in the removable assembly pulley of the removable assembly pulley in front portion or rear portion and the path of wriggling of crossing around pulley to engage both front pulleys and rear pulleys.In at least some configuration, described right front pulleys and described rear pulleys can be configured to and comprise reaction assembly pulley pulley, when launching the bracket connecting end portion of rope towards cylinder by the elastic energy be stored in reaction assembly pulley pulley couplings described during rear haulage in front springs parts and Rear springs parts.In addition, the track of the inside being positioned at cartridge unit can be provided.Described track is also configurablely keep flatly static with vertically mobile simultaneously.In addition, firing lock and/or trigger sub-assembly can be provided.The configuration of system has 12 inches or less width.In addition, launch rope and be wound around more than three times or three times around distal pulley wheels.

Of the present invention relating on the other hand again, contains propulsion system certainly.Described from containing that propulsion system comprises: a) elongated cartridge unit, it forms the chamber with elongated cartridge unit near-end and elongated cartridge unit far-end, wherein elongated cartridge unit near-end engagement installation bracket; B) a pair front springs parts, it has front springs member proximal end and front springs distal end separately, described right front springs parts are placed in the chamber of elongated cartridge unit, and wherein the far-end of front springs parts is connected to corresponding movable supporting frame and the near-end of front springs parts is connected to removable assembly pulley; C) a pair Rear springs parts, each have Rear springs member proximal end and Rear springs distal end, described right Rear springs parts are placed in the chamber of elongated cartridge unit, and wherein the far-end of Rear springs parts is connected to removable assembly pulley and the near-end of Rear springs parts is connected to corresponding movable supporting frame; D) a pair front pulleys, each front pulleys is couple to one and at least one rear pulleys in front springs member proximal end, is connected to Rear springs distal end; And e) launch rope, it has first end and the second end, described first end and the second end can any one place's attachment in the removable assembly pulley of the removable assembly pulley in front portion or rear portion and the path of wriggling of crossing around pulley to engage both front pulleys and rear pulleys, wherein said right front pulleys and rear pulleys comprise reaction assembly pulley pulley, when launching the bracket connecting end portion of rope towards cylinder by the elastic energy be stored in reaction assembly pulley pulley couplings described during rear haulage in front springs parts and Rear springs parts.In addition, the track of the inside being positioned at cartridge unit can be provided.Described track can be configurablely keep flatly static with vertically mobile simultaneously.Some configurations will comprise firing lock and/or trigger sub-assembly.As other configuration, described system has 12 inches or less width.Launch rope and be wound around more than three times or three times around distal pulley wheels.

Another aspect of the present invention relates to the method according to any disclosed configuration operation system.Said method comprising the steps of: propulsion plant is provided; In backward directions, traction is launched rope and is launched rope and stretching, extension front springs parts and each backward in spring members toward each other strain; And release launches rope to provide from back-moving spring and energy mutual of launching rope and transmission simultaneously.In addition, described method can comprise provides linear projectile; And linear projectile is placed in the cylinder of propulsion system with engage launch rope, wherein provide linear projectile and by linear projectile the step be placed in the cylinder of propulsion system be traction launch rope step after perform.

Bibliography is incorporated to

All publication, Patent Case and the patent application case mentioned in this manual all as each indivedual publication, Patent Case or patent application case to be all specifically and the same degree be incorporated to way of reference through instruction is separately incorporated herein by reference, for all objects and as all repeated in this application.The bibliography paid close attention in addition comprises: the United States Patent (USP) 4,050,438A about " types of springs casting device (SPRINGTYPEPROJECTINGDEVICE) " authorizing Pfotenhauer that on September 27th, 1977 promulgates; The United States Patent (USP) 4,169,456A about " manomelia archery bow (SHORTLIMBARCHERYBOW) " authorizing VanHouse of promulgation on October 2nd, 1979; The United States Patent (USP) 4,411,248A about " launching structure (CATAPULTCONSTRUCTION) " authorizing Kiveson that October 25 nineteen eighty-three promulgates; The United States Patent (USP) 4,703,744A about " for shooting the equipment (APPARATUSFORSHOOTINGAPROJECTILE) of projectile " authorizing the people such as Taylor that on November 3rd, 1987 promulgates; The United States Patent (USP) 5,243,955A about " mechanical shooting device (MECHANICALSHOOTINGAPPARATUS) " authorizing Farless that on September 14th, 1993 promulgates; The United States Patent (USP) 5,673,677A about " projectile transmitter (PROJECTILELAUNCHINGAPPARATUS) " authorizing Wing that on October 7th, 1997 promulgates; The United States Patent (USP) 7,578,28962 about " there is compound archery bow (COMPOUNDARCHERYBOWWITHEXTENDEDINVERTEDSTROKE) stretching return stroke " authorizing Norkus of promulgation on August 25th, 2009; And disclosed in 8 days November in 2012, authorize the PCT publication WO2012/150387A1 about " the lance rifle (SPEARGUNFORUNDERWATERFISHING) for underwater fishing " of Lamine.

Accompanying drawing explanation

Novel feature of the present invention is careful elaboration in the dependent claims.The illustrative embodiment of the principle of the invention is wherein utilized to obtain the better understanding to Characteristics and advantages of the present invention with the following detailed description of its accompanying drawing with reference to setting forth:

Figure 1A is the plan view from above of propulsion system, described propulsion system comprises external frame, and Figure 1B is the identical view omitting external frame, and Fig. 1 C is the lateral elevational view comprising external frame, and Fig. 1 D is the view identical with Fig. 1 C omitting external frame equally;

Fig. 2 is the perspective view launching rope, and in fact it be wrapped between distal pulley wheels in their corresponding removable assembly pulley and near-end pulley, but not containing the removable assembly pulley of far-end;

Fig. 3 A is the lateral elevational view of device in contraction spring position, and Fig. 3 B is stretching the lateral elevational view in spring position or projectile transmitting ready state; Fig. 3 C is the close-up side view of the slide trigger device sub-assembly comprising external frame; Fig. 3 D is the close-up frontal sectional view of the slide trigger device sub-assembly comprising external frame;

Fig. 4 is the partial perspective view launching spring in ready state in extended position or projectile;

Fig. 5 is attached to the more detailed perspective view of removable pulley mechanism launching the spring in ready state in extended position or projectile;

Fig. 6 is the close up perspective view taking Fig. 4 and Fig. 5 at string place comprising arrow projectile, described in take the removable pulley of far-end that string place is adjacent to the spring be attached in punctured position;

Fig. 7 A is stretching the plan view from above being connected to support bracket fastened external frame shown in spring position or projectile transmitting ready state, and Fig. 7 B describes to have omission external frame to be better depicted in the fixing plan view from above be connected with movable supporting frame to spring in extended position, and Fig. 7 C illustrates to have omission external frame so that the plan view from above be connected with the fixing of spring and movable supporting frame in position during being better depicted in contraction, and Fig. 7 D illustrates to have and omits external frame to be better depicted in the plan view from above of the spring in punctured position,

Fig. 8 A-C is the schematic diagram representing rope, assembly pulley, pulley and spring that the replacement scheme of testing in the comparative example configures;

Fig. 9 A-H is the separate views of the such as rail mechanism shown in Fig. 1 and 7;

Figure 10 A-C is front view and the isometric view of describing the handle position be configured in integrated form firing lock;

Figure 11 A-F is local side view and the top view of passive security mechanism;

Figure 12 A-H describes anti-dry local side view and the top view beating (anti-dry-fire) mechanism in detail;

Figure 13 A-D is side view and isometric view that automatic contractile support leg mechanism is described;

Figure 14 A-C illustrates adjustable bracket; Wherein Figure 14 A-B is the partial side view that gamut adjustable is described in detail in detail, and Figure 14 C is the concrete proximal end view of the assembly of bracket relieving mechanism;

Figure 15 A-B is the equidistant close-up illustration of launching rope tension terminal; And

Figure 16 A-B is the top view with the arrow keeping system that spring stretches and arrow loading and spring contraction arrow do not load.

Detailed description of the invention

Referring to figs. 1 to 16, wherein in each view, similar reference number refers to similar assembly, wherein illustrate the novelty being used for elasticity projectile propulsion system and the device improved, described elasticity projectile propulsion system called after 100 generally in this article.Elasticity projectile propulsion system is system of linearly shooting an arrow.Elasticity projectile propulsion system 100 can be described to emitter or transmitter.Spatial orientation is labeled as " P " and " D " respectively with reference to " near-end " and " far-end " in the drawings, wherein near-end be positioned at apart from user the most nearby and far-end be positioned at apart from user farthest.Transmitting rope is placed between removable pulley by system and device.

Various described embodiment described herein provides multiple benefit, it comprises such as, stablize elastic metallic or cluster spring, described stable elastic metallic or cluster spring can be disposed has the reduction inertia burden that spring-mass gives in the speed of the projectile of such as arrow, because elasticity projectile propulsion system 100 utilizes removable pulley and attachment to launch rope couple the power of multiple spring and travel distance to accelerate to launch rope and attachment projectile exceeding under the speed of described intrasystem each independent spring translational speed simultaneously simultaneously.In addition, elasticity projectile propulsion system 100 is emitters, it can very narrow (such as, width is 12 inches (30.48 centimetres) or less), lightweight (such as, weight is 9 pounds (4.08kg) or less), compact (such as, volume is 500 cubic inches (8,193 cubic centimetres) or less).As an example of this benefit, compared with shooting crossbow with sports, realize high speed flight without the need to huge, wide and heavy bow arm body.Equally, stable metal in elasticity propulsion system 100 or cluster spring provide more reliable elastic performance compared with the propulsion plant utilizing caoutchouc elasticity under the weather condition of series of temperature, and this known has the elastic performance changed along with the temperature weather condition of broad range.

In addition, described embodiment provide to compare with crossbow with current operational bow make use compared with the arrow of light weight certainly contain propulsion system, this weight that have followed restriction arrow generally bends the industry guideline of the weight of the arrow of tractive force 5 grain to every pound.As those skilled in the art will understand, when launching with identical drawing length and power (such as, power stroke), arrow light compared with heavier arrow can obtain much higher speed.Propulsion system 100 can launch projectile safely, and such as every pound of tractive force is less than the arrow of the arrow weight of 5 grains.The low-down trailing weight being less than 125 pounds is for another advantage of configuration provided herein.This allows the direct percussion lock of user, and does not need the percussion lock utilizing remarkable mechanical dominance.As those skilled in the art will understand, most of crossbow between 125-200 pound (56.7-90.72 kilogram) trailing weight scope and need or as independent device or as the percussion servicing unit of integrated assembly to obtain mechanical dominance.Device and system

Turn to Figure 1A now, which illustrate the plan view from above of elasticity projectile propulsion system 100, described elasticity projectile propulsion system is included in the elongated external frame 111 that wherein length is greater than width.Figure 1B is the identical view of the elasticity projectile propulsion system 100 omitting external frame.Fig. 1 C is the lateral elevational view of the elasticity projectile propulsion system 100 comprising elongated external frame 111.Fig. 1 D is the lateral elevational view of the elasticity projectile propulsion system 100 omitting external frame.According to the present invention, elasticity projectile propulsion system 100 has elongated external frame 111, elongated central orbit parts 110, described external frame has the chamber having inner surface and outer surface wherein, the relative bracket connecting end portion 110b that the anterior emission end 110a that described central orbit parts have far-end placement places with near-end.Elongated central orbit parts 110 can be configured to a part of inner surface connecting elongated external frame 111 along the length bottom the inwall of elongated external frame 111.Connection between elongated external frame 111 and elongated center track component 110 can in fixed position illustrated in such as Figure 1A and Fig. 1 C.One or more fixed support 220,230 can the inner surface of elongated external frame 111 and perpendicular on the inwall of elongated external frame 111 for being connected to elongated external frame 111, each fixed support 220,230 can be positioned on the opposed end place of elongated external frame 111, such as, proximal location in illustrated in such as Figure 1A-D fixed position and remote location.

That elongated center track component 110 and fixed support 220,230 integrally can form rigidity together with elongated external frame 111 in fixed position and sane barrel structure or shell.Can install front springs parts 120 that a pair far-end place, 120' so that the opposite flank being in the elongated center track component 110 being adjacent to the anterior emission end 110a that far-end is placed at its remote spring end 120a, 120'a to be connected to fixed support 220 via movable supporting frame 127a, 127'a, each front springs parts 120,120' have near-end spring end 120b, the 120'b relative with remote spring end 120a, 120'a.Similarly, can install Rear springs parts 130 that a pair near-end place, 130' so that the opposite flank being mounted opposite the elongated center track component 110 of bracket 160 being in the near-end that is adjacent to connecting end portion 110b at its near-end spring end 130a, 130'a and placing to be connected to fixed support 230 via movable supporting frame 137a, 137'a, wherein remote spring end 130b, 130'b are relative with near-end spring end 130a, 130'a.Each front springs parts 120,120' and Rear springs parts 130,130' can be connected to multiple removable assembly pulley or pulley block system 140 (shown in Fig. 2, Fig. 5, Fig. 6 and Figure 15 A-B more details), described pulley block system 140 disposes the removable assembly pulley 125 of the removable assembly pulley of near-end 135,135' and far-end, 125', and comprises transmitting rope 150.As illustrated in fig. 6, should note what the removable assembly pulley of far-end 125,125' were made up of the lower shaft portion of top removable assembly pulley connecting rod 125a, 125'a and movable supporting frame 127b, 127'b, and be connect with by pulley wheel wheel shaft 129,129' fixing pulley wheel 126a, 126b, 126'a, 126'b.In addition, illustrated by Figure 15 A-B, removable assembly pulley 135,135' are made up of top removable assembly pulley connecting rod 135a, 135'a and bottom removable assembly pulley connecting rod 135b, 135'b, and be connect with by pulley wheel wheel shaft 139,139' fixing pulley wheel.

As shown in Figure 1 D, for handheld apparatus, the use handle 161 that it is still preferential or support member or the installation bracket 160 in the proximal end of elongated center track component 110.Although described device can be configured to directly manually extend and release transmitting rope 150, but also can use and launch rope latch 170, described transmitting rope latch 170 is activated by the trigger 180 being connected to elongated center track 110 by trigger sub-assembly 185.In addition, the diameter of the removable assembly pulley of far-end 125,125' and the removable assembly pulley of near-end 135,135' is wide unlike front springs parts 120,120' and Rear springs parts 130,130', to keep compact (such as, there is the diameter from 1/4 inch to 3/4 inch) of elasticity projectile propulsion system 100.Pulley or sheave (it is the wheel of the with groove of a part as assembly pulley) can comprise bearing (not shown), to reduce friction, or are provided as without the need to bearing.

Fig. 2 launches the perspective view of rope 150, and in fact it be wrapped between distal pulley wheels in their corresponding removable assembly pulley and near-end pulley (without the need to the removable assembly pulley of far-end is described).As described, at least one near-end pulley 136,136' are the remote spring ends being connected or coupled to each Rear springs parts by movable supporting frame 137b, 137'b by the removable assembly pulley of near-end 135,135', and at least one distal pulley wheels 126a, 126b and 126'a, 126'b couple or be connected to near-end spring end by the removable assembly pulley of far-end of each front springs parts (being positioned at far-end).Launch rope 150 to there is transmitting rope first end 150a and launch rope second end 150b (relative to transmitting end portion), it is engaged on the removable pulley of near-end 136 in group 135,135', 136' and distal pulley wheels 126a, 126b and 126'a in their corresponding removable assembly pulley (description), 126'b, and on tackle system opposed end to draw to (near-end) after launching rope center 150c time provide a pair reaction assembly pulley pulley to couple the elastic energy be stored in front springs parts and Rear springs parts.

Without excess friction by adding the power of multiple spring matched, couple each removable assembly pulley and bear with the inertia that the pulley that is associated overcomes metal spring with movement together with spring.In addition, as illustrated in figure 2 (it omits the spring being attached to each removable assembly pulley), preferably provide three of the transmitting rope 150 between distal pulley wheels 126a, 126b and near-end pulley 136 to be wound around, and three of transmitting rope 150 between near-end pulley 126'a, 126'b and near-end pulley 136' are wound around.The spring of this configuration and pulley also schematically show in Fig. 8 C.

With launch the spring of restricting when discharging cooperate mutually movement pulley between multiple launch to restrict to be wound around and the combination of projectile can realize larger emission rate, simultaneously method improves to launch the speed that the power of stroke is delivered to projectile, and contribute to compact, lightweight, steadily and surely and design reliably.First, should understand emission rate will be proportional with the product launching stroke with emissivity, and wherein launching stroke is the distance that power is applied through.The second, the speed that is appreciated that now is by proportional for the speed that can apply with emissivity.But, helical spring is not by those skilled in the art is favored for propelling of shooting an arrow, this is because helical spring has been in the compromise point of these factors because by more greatly or stronger spring increase emissivity and or stroke be subject to the restriction of spring-mass and the proportional increase of inertia.Although elastomer or elastomeric material provide high energy to mass density, described material is insecure below 40 °F (4.4 degrees Celsius).In addition, reusing of material may make material degradation or cracking with environmental exposure, and is subject to the physical damage of other material that they may contact.Generally, metal and combined helical spring compared with elastomer or elastomeric material for more reliable during these conditions.

Fig. 3 A is the lateral elevational view of device in contraction spring position, and Fig. 3 B is stretching the lateral elevational view in spring position or projectile transmitting ready state.Fig. 3 C is the close-up side view of the slide trigger device sub-assembly comprising external frame, and Fig. 3 D is the close-up frontal sectional view of the slide trigger device sub-assembly comprising external frame.When projectile 10 (such as, arrow) when launching, the removable assembly pulley 125 of far-end, the 125' that are connected to movable supporting frame 127b, 127'b are distally pulled by front springs parts 120,120', and the removable assembly pulley 135 of the near-end being connected to movable supporting frame 137b, 137'b, 135' are proximally pulled by Rear springs parts 130,130'.Therefore, as shown in fig. 3, in contraction spring position, the removable assembly pulley of far-end 125,125' are separated with removable assembly pulley 135,135' with distance (the first distance L1), described first distance as shown in Figure 3 B, is reduced to small distance (second distance L2) from the first distance L1 after loading or stretching, extension.Launching stroke is (Ll-L2) x, wherein x be launch rope cross or the removable assembly pulley 135 of the removable assembly pulley of opposite proximal end 125,125' and near-end, winding between 135' number, it comprises as shown in Figure 3 B when the interpolation of launching rope center 150c when loading or in extended position.In this example, L1-L2=7.5 inch, is then multiplied by 4 (3 pulleys are wound around the interpolation adding 1, to explain the utilization of axial cord 150c), and therefore produces the transmitting stroke of 30 inches.

As shown in Fig. 3 A-3B, multiple parallel spring can be adopted with by being engaged to the removable assembly pulley 135 of the removable assembly pulley of each far-end 125,125' or near-end, 135' to the connection of movable supporting frame 127b, 127'b and 137b, 137'b.

Illustrated by Fig. 3 A-D, transmitting rope latch 170 and handle 161 can be attached to the removable trigger sub-assembly 185 can advanced along the length of elongated center track 110.As depicted in figs. 3 c and 3d, the top corners of trigger sub-assembly 185 is roller bearing installed part 186a, 186'b and 187a, the 187'b (186a is not shown in partial view) in the gap stretched upwards through the bottom lengths spreading elongated external frame 111.Transmitting rope latch 170,170' extend through identical two gaps of either side vertical spread elongated external frame 111 length at elongated center track 110.Be attached to roller bearing installed part 186a, 186'b and 187a, 187'b end be guide in shape the roller bearing 186 be traveling on the either side of elongated center track 110,186' and 187,187'(186 not shown in partial view at passage).When keeping for good and all being attached to elongated center track 110, this configuration makes to launch rope latch 170, handle 161 and trigger sub-assembly and to advance on near-end and far-end two kinds of directions the length of elongated center track 110.This mechanism provide by for or percussion or remove the handle 161 of percussion lock and stretch and discharge the method for launching rope 150.As shown in figs. 3 a-3 c, trigger combination part 185 is for good and all attached to snap close 181, and described snap close 181 can connect from the static latch 162 be for good and all attached installation bracket 160 and disconnect.

Fig. 4 is the partial perspective view launching spring in ready state in extended position or projectile.Fig. 5 is attached to the more detailed perspective view launching the removable pulley mechanism of the spring in ready state in extended position or projectile.Fig. 6 is the close up perspective view taking Fig. 4 and Fig. 5 at string place comprising arrow projectile 10, described in take the removable pulley of far-end that string place is adjacent to the spring be attached in punctured position.Multiple windings between the pulley in the removable assembly pulley of far-end 125,135 that relative spring is associated can increase transmitting or power stroke.But, because spring moves after the release of transmitting rope simultaneously, be back to remainder or equilbrium position, and inertia restriction still exists, so the contribution of each spring to emission rate is added, this be wound around by multiple pulley the larger power stroke evaluated and combine and can overcome these inertial spring barriers and the emission rate greatly improving the projectile of such as arrow 10.In addition, as as shown in second embodiment of Fig. 3-6, configured in parallel can add to provide additional force in extra spring to each movable supporting frame being connected to removable assembly pulley, and do not enlarge markedly physical size, except laterally slightly increasing height along elongated center track component 110.

As shown in Figure 5, be preferably connected to front springs parts 120, movable supporting frame 127b, 127'b of near-end of 120' connected by bridge 225, this connection extends through and crosses elongated center track component 110.Bridge 225 also extends through any projectile of such as arrow 10.

As shown in Figure 6, launch rope center 150c be removably can be attached to projectile take string place 300, described projectile such as arrow 10 and the projectile for the release when flying.Taking string place 300 is the recesses in the last end of arrow, and it is in order to keep along with the traction arrow of bow is at string or in launching on rope 150 suitable position.But launching rope 150 in the projectile situation of complexity can be coupled to projectile by the more accurate middle groups component (not shown) run together with elongated center track 110, and projectile is launched from middle sub-assembly.Therefore, elongated center track 110 can be deployed to and guide projectile.When arrow projectile, track can configure by minimally, but especially cannot disturb the flight of arrow wing.When other projectile, elongated center track 110 can be larger, and need not to be linear.

As relative to Fig. 3-6 discuss, front springs parts 120,120' can be combined in parallel group with Rear springs parts 130,130', the each group of one or more removable assembly pulley of engagement, but preferably dispose four metals or combined helical spring in portion's spring members 120,120' in each of front, preferably in each Rear springs parts 130,130', dispose three metals or combined helical spring.Spring tension in front springs parts and Rear springs parts should be balance with the mechanical dominance of the pulley be associated, and shrinks during launching to make front springs parts and Rear springs parts simultaneously.When using the unified spring sizes being used for each spring, when spring being in extended position, the number of the transmitting rope 150 of each removable assembly pulley can being connected to by coupling and determining to balance with the number springs in each spring members.As an example, as shown in Figure 5, in spring stretches position, being attached to Rear springs parts 130, each removable assembly pulley place of 130' forms 3 and launches rope and connect, and therefore each spring members comprises 3 springs.Similarly, being attached to front springs parts 120, two removable assembly pulley places of 120' form 4 and launch ropes 150 and connect, and therefore each spring members comprises 4 springs.Alternatively, in front and rear spring members, different spring sizes can be used for the equilibrium realizing having pulley advantage.Spring members is optional metals or combined helical spring.Spring is being deployed in tension force preferably, but the configuration with at least some spring in compact model is possible.

In addition, dispose metal or work with other torsionspring making guiding launch the pulley displacement of rope to stretch some emitters, their performance can by adding the second removable pulley of being connected to compression or tension spring or removable assembly pulley is got back to torsionspring parts with winding of transmittings being restricted before transmitting rope engagement projectile and is improved.

Fig. 7 A is stretching the plan view from above being connected to support bracket fastened external frame shown in spring position or projectile transmitting ready state, and Fig. 7 B describes to have omission external frame to be better depicted in the fixing plan view from above be connected with movable supporting frame to spring in extended position, and Fig. 7 C illustrates to have omission external frame so that the plan view from above be connected with the fixing of spring and movable supporting frame in position during being better depicted in contraction, and Fig. 7 D illustrates to have and omits external frame to be better depicted in the plan view from above of the spring in punctured position.

In addition, movable supporting frame 127a, 127'a and movable supporting frame 137a, 137'a can be used for allowing freely to advance respectively by fixed support 220,230, and described fixed support 220,230 is securely attached to inwall at the opposed end place of elongated external frame 111 and elongated center track 110.Illustrated by Fig. 7 A-D, the far-end of one or more damper 128,128' to movable supporting frame 127a, the 127'a on the distal face being positioned at fixed support 220 is installed, the near-end of one or more damper 138,138' to movable supporting frame 137a, the 137'a on the proximal end face being positioned at fixed support 230 is installed.As shown in Fig. 7 A-B, in extended position, front springs parts 120,120' power draw movable supporting frame 127a, 127'a in the proximal direction, therefore pull one or more damper 128, distal face that 128' abuts against the fixed support 220 being attached to elongated external frame 111 securely, and simultaneously Rear springs parts 130,130' power draw movable supporting frame 137a, 137'a in a distal direction, therefore pull damper 138,138' to abut against securely to be attached to the proximal end face of the fixed support 230 of elongated external frame 111.During contraction process, power in front springs parts 120,120' moves movable supporting frame 127b, 127'b in a distal direction until keep the halt at static place launching rope center 150c, then due to the projectile of such as arrow 10 continue up at far-end transmit direction so that with take string place 300 drop out of gear.Meanwhile, the power in Rear springs parts 130,130' moves movable supporting frame 137b, 137'b in the proximal direction until keep the halt at static place at transmitting rope 150.The power not being applied to projectile 10 continues to be advanced through front springs parts 120,120' and Rear springs parts 130,130'.Front springs parts 120, 120' continues to move in a distal direction, and then promote movable supporting frame 127a, 127'a is by fixed support 220, therefore damper 128 is moved in a distal direction, 128' is away from fixed support 220 (being attached to the far-end of elongated external frame 111), and simultaneously Rear springs parts 130, 130' continues to move in the proximal direction, and then promote movable supporting frame 137a, 137'a is by fixed support 230, therefore damper 138 is moved at proximal direction, 138' is away from fixed support 230 (being attached to the near-end of elongated external frame 111).One or more damper 128, 128' and movable supporting frame 127a, 127'a continues to move until at front springs parts 120 in a distal direction, reaction force in 120' arrives balance and contains their far-end traveling process, therefore them are moved at proximal direction backward, and return one or more damper 128, 128' is to their initial position, the distal face abutting against fixed support 220 flushes, and simultaneously damper 138, 138' and movable supporting frame 137a, 137'a continues to move until at Rear springs parts 130 in the proximal direction, reaction force in 130' arrives balance and contains their near-end traveling process, therefore them are moved in a distal direction backward, and return damper 138, 138' is to their initial position, the proximal end face that described initial position abuts against fixed support 230 flushes, namely, stable state in contraction spring position, illustrated by Fig. 7 C and Fig. 7 D.Therefore, these configurations make the excessive power of the projectile not being applied to such as arrow 10 again be absorbed Sum decomposition in system, and do not cause Continuous Damage to system.

Fig. 8 A-C is the schematic diagram representing rope, assembly pulley, pulley and spring that the replacement scheme of testing in the comparative example configures, the assembly pulley only illustrated on central orbit side is wherein described, comprises the half of the symmetry be associated of launching rope.In addition, around the pulley that the common axis of single assembly pulley or wheel shaft rotate shown in Fig. 8 A-C, launch cord circuit footpath as vertically spaced apart better to illustrate and launch rope first end 150a, the terminal that described transmitting rope first end defines half transmitting rope 150 connects.The direction of its transmitting is pointed in the projectile of such as arrow 10 by front springs parts 120 and Rear springs parts 130.Fig. 8 C corresponds to the embodiment of Fig. 1 and Fig. 2.Both the configurations should noting in Fig. 8 A and Fig. 8 B all dispose two assembly pulleys 125,135 and respectively two pulley wheels 126a, 126b and 136a, 136b each in, between pulley, form four windings to make launching rope.But, in fig. 8 a, because anterior or distal pulley wheels group 125 have been attached in the fixing point of the far-end of elongated center track 110, thus only near-end assembly pulley 135 owing to being attached to spring but moveable.Fig. 8 C as shown in figs. 1 a-b, wherein only utilizes three pulley wheels in two removable assembly pulleys.In the removable assembly pulley 125 of far-end that two pulley wheels 126a, 126b are placed on the near-end being attached to front springs parts 120, and a pulley wheel 136 is placed in the removable assembly pulley 135 being attached to near-end spring (in remote spring end), and string or transmitting rope 150 end directly end at near-end spring 130.Bowstring or transmitting rope 150 are advanced around three pulley wheels now on the either side of central orbit.

Contrast test result shows the configuration illustrated in Fig. 8 C and produces excellent arrow speed, and its result discusses in more detail in following part of detecting.But, the summary of described result is made drawing a conclusion: if be immovable with one group of pulley or be fixed to the stationary part of embodiment or launch compared with fixed position that the end of restricting is attached to relative to elongated center track component 110, associate each removable assembly pulley 125,135 with correspondingly with the elastomeric element in the relative direction of the spring members of tension, front springs parts 120 and Rear springs parts 130 or pulley relative in assembly pulley configures individually movement provide higher emission rate.Because frictional force is introduced in each winding of the transmitting rope 150 around pulley 126,136, so wish that the pulley winding of launching rope 150 drops to minimum, still obtain simultaneously the additional delivered power of relative spring and stroking distance from, described relative spring comprises front springs parts 120 and Rear springs parts 130.

Fig. 9 A-H is the separate views of the such as rail mechanism shown in Fig. 1 and 7.Fig. 9 A-C depicts has larger-diameter projectile, such as arrow 10, and Fig. 9 D-E describes the projectile with small diameter, such as arrow 10.As illustrated in Fig. 9 A-H, the over-molded central orbit 112 that elongated center track 110 can be configured with interpolation aligns so that the arrow of rising or reduction different-diameter takes string place 300 with the projectile and arrow that keep such as arrow 10 with transmitting rope center 150c.Over-molded central orbit 112 is nested on the top of elongated center track 110, and be configured over-molded central orbit 112 can be raised and lower simultaneously keep with elongated center track 110 parallel alignment, to hold the arrow of different-diameter.In the adjacent side of over-molded central orbit 112, angled recess has been positioned at the near-end 112b of over-molded central orbit 112, center and far-end 112a region.Each recess 112c, 112'c, 112d, 112'd and 112e of over-molded central orbit 112,112'e are shelved on and can be installed to wherein and along on the latch 113 of the adjacent side of over-molded central orbit 112.Recess 112c, 112'c are shelved on latch 113a, 113'a, and recess 112d, 112'd are shelved on latch 113,113', and recess 112e, 112'e are shelved on latch 113b, 113'b.Fig. 9 F-H is the zoomed-in view of the mechanism for adjusting over-molded central orbit 112.In the proximal end of over-molded central orbit 112, adjustment screw 114 is installed to over-molded central orbit 112 by grommet 116.The far-end of adjustment screw 114 is connected to U-shaped folder end 117.Over-molded central orbit 112 is connected to U-shaped folder end 117 by slotted link 119 subsequently, and the flute profile end of connecting rod is captured by U-shaped folder latch 118 in U-shaped folder end 117.As shown in fig. 9h, when adjusting screw 114 and turning clockwise, along with the angled recess in over-molded central orbit 112 is advanced can be arranged on the latch 113 in over-molded central orbit 112 side, adjustment screw draws over-molded central orbit 112 on near-end and upward direction.

Figure 10 A-C is front view and the isometric view of describing the handle position be configured in integrated form firing lock.In addition, handle 161 can be configured to two displaceable members, that is, be attached to removable handle 161, the 161' of trigger combination part 185 with two hinges 183,183', as in Figure 10 A-C describe, with the percussion of servicing unit or remove percussion.Scope mount 201 also can be attached to elongated external frame 111 to install gun sight 200.

Figure 11 A-F is local side view and the top view of passive security mechanism.In addition, as in Figure 11 A-F describe, the mechanism in trigger combination part 185 can be configured to during percussion process, activate release mechanism (it forbids the deployment of propulsion system) passively.In order to make trigger 180 discharge launch rope latch 170,170'(and dispose propulsion system), trigger 180 must rotate around its axle latch 182, described axle latch away from be connected to launch latch 170 of restricting, top that far end party that the latch 175 of 170' contacts rotates up trigger 180.As shown in Figure 11 E, when safety pin 174 move in proximal location (home), exceed spherical column 176 and enter into the safety pin snap close groove at the top of trigger 180 time, trigger 180 cannot rotate to and make to launch rope latch 170,170' disposes the position of propulsion system.The end of safety pin 174 to the first toggle arm 173a be combined in ridged mode perpendicular to the second toggle arm 173b is installed.It is pivotable that two toggle arms are on axle latch 172 at the point that the first toggle arm 173a and the second toggle arm 173b combines.When the second toggle arm 173b moves up, the safety pin 174 of attachment is moved to home by the first toggle arm 173a by the second toggle arm 173b.The latch 175 of transmitting rope latch 170,170' is positioned at below the second toggle arm 173b.Launch rope latch 170,170' to be arranged in trigger combination part 185 by axle latch 171, make during percussion process when launch rope latch 170,170' top with launch rope center 150c contact and launch when exceeding the far end party of launching rope center 150c and moving up latch 170 of restricting, 170' can tilt backwards (proximally).Tilt backwards owing to launching rope latch 170,170', its latch 175 moves up, and therefore move up the second toggle arm 173b, and therefore mobile security latch 174 in home, illustrated by Figure 11 C.Safety pin 174 can manually movement in a distal direction subsequently, leaves home, obtains activating (and disposing propulsion system) to allow trigger 180.

As shown in Figure 11, in another configuration, launch rope latch 170,170' can be deployed to the projectile of launching rope 150 and attachment for fixing, such as arrow (not shown) and at least one spring in extended position-until discharged by trigger 180.Spring can be metal or combined helical spring, preferably tension spring, but also can be elastomeric material, such as rubber tube etc.Front springs parts 120,120' and Rear springs parts 130,130' are parallel to elongated center track component 110 and install; But, as those skilled in the art will understand, front springs parts 120,120' and Rear springs parts 130,130' can be arranged on different orientation, the removable assembly pulley be wherein attached is deployed to be redirected launches rope 150 to advance the projectile of such as arrow 10 along central orbit direction, and these do not depart from the scope of the present invention.In addition, should be appreciated that elastic energy is stored in generally to launch in rope and spring.Therefore, not getting rid of all or part of transmitting rope is formed by rubber or elastomer (such as, belt or pipe), although this may be only desired in isothermal environment.

Figure 12 A-H describes anti-dry local side view and the top view beating (anti-dry-fire) mechanism in detail.In order to strengthen security further, illustrated by Figure 12 A-H, a mechanism can be increased to guarantee cannot not dispose containing propulsion system during the arrow ridden on string in transmitting rope.In instantaneous configuration, string snap close 164 is installed to installation bracket 160 top by hinge.As in Figure 12 C describe, depositing in case without projectile (such as take string place 300 by it and be connected to the arrow 10 launching rope center 150c), string snap close 164 allows to be shelved on to be launched on the 150c of rope center, and described transmitting rope center 150c can contain that launching rope center 150c advances to the position all disposed.The far-end of string snap close 164 is shaped at a certain angle, and this angle is slightly downward to guarantee that string snap close 164 does not stop percussion process near end.During percussion process, the angular shape of the far-end on string snap close 164 promotes that string snap close 164 is from its hinge mounting component upwards pivotable, and it is mobile by string snap close 164 in the proximal direction that this makes to launch rope center 150c, and significantly do not disturb.In addition, as shown in fig. 12g, pusher arm 165 is connected through the hinge and is connected to the downside of string snap close 164.Pusher arm 165 stretches downwards and is shelved on snap close 181.Deposit in case in the projectile without such as arrow 10 during removing percussion process, when snap close 181 upwards promotes, pusher arm 165 is also pushed upwardly, and it upwards promotes string snap close 164 then, and therefore along with its far end path and disengaging with transmitting rope center 151c of advancing downwards.This mechanism guarantees during going percussion, prevent string snap close 164 and launch rope center 150c interfere, and it is also like this for even taking when string place 300 is engaged to and launches rope center 150c not by it in the projectile of such as arrow 10.

Trigger combination part 185 is configured to be attached to installation bracket 160 by the snap close 181 be installed in trigger combination part 185.As shown in figure 12 c, snap close 181 is connected with the corresponding static latch 162 being arranged in the low portion of installation bracket 160.This mechanism makes trigger combination part 185 and the transmitting rope latch 170 that is associated, 170' are pulling the trigger completely or be fastened in the fixed position of the proximal end of elasticity projectile propulsion system 100 by transmitting rope center 150c during transmitting ready state.Illustrated by Figure 12 G, snap close 181 can from the corresponding static latch 162 installation bracket 160 drop out of gear, allow device go percussion while trigger sub-assembly 185 move freely in a distal direction.

Figure 13 A-D is side view and isometric view that automatic contractile support leg mechanism is described.Illustrated by Figure 13 A-D, in another configuration, elasticity projectile propulsion system 100 can comprise leg 221 to aid in percussion process.In current execution, leg 221 is attached through spring wall 220 by two leg installed parts 222,222'.On the near-end of each leg installed part 222,222', be attached with helical spring 223,223' abuts against elongated external frame 111 in punctured position to keep leg 221.This configuration makes leg increase obtainable leg space during use, and when not in use subsequently, leg is space-minimized to reduce other potential interference operated with elasticity projectile propulsion system 100.

Figure 14 A-C illustrates adjustable bracket; Wherein Figure 14 A-B is the partial side view that gamut adjustable is described in detail in detail, and Figure 14 C is the concrete proximal end view of the assembly of bracket relieving mechanism.As in Figure 14 A-C describe, adjustable gun stock can be contained in elasticity projectile propulsion system 100.Gun stock 231 is attached to the near-end of two bracket mounting bars 232,232'.The far-end of bracket mounting bar 232,232' is through that hole in installation bracket 160, the slotted eye in each release-push 233,233' and the hole in spring wall 230 install, to make bracket mounting bar 232,232' stretch in the proximal direction or towards installation bracket 160.Bracket mounting bar 232,232' each on the surface, what run through the length of each bar is a series of banded recess.Illustrated by Figure 14 C, release-push 233,233' be embed be installed in the either side of installation bracket 160, and can in the embedded model of installation bracket 160 on axle bolt 235,235' pivotable.Release-push 233,233' maintain their the relative extreme position of advancing by two helical springs 234,234', make their the outer peripheral arbitrary edge extending beyond installation bracket 160 separately.In this position, the inward flange of each slotted eye in each release-push 233,233' is promoted in the recess on the side of each bracket mounting bar 232,232'.In this position, bracket mounting bar is forbidden stretching or shrinking.Two release-pushes 233,233' can inwardly press to allow each bracket mounting bar 232,232' to stretch or release simultaneously.This configuration allows that bracket is to be adjusted coordinates the user with different physical requirement, and allows bracket between the non-operating period to obtain minimizing will drop to minimum with the transport of elasticity projectile propulsion system 100 or the potential interference of storage.

Figure 15 A-B is the equidistant close-up illustration of launching rope tension terminal.Should understand and launch the near-end that rope 150 first end 150a and the second end 150b can be attached to front springs parts, but preferably be attached to the far-end of Rear springs parts 130,130'.In at least some configuration, as in Figure 15 A-B describe, transmitting rope first end 150a and transmitting rope second end 150b is attached to two corresponding transmitting rope tensioning mechanisms of the bottom being positioned at least one near-end pulley 136, below 136' and near-end removable assembly pulley connecting rod 135b, 135'b, and it makes to launch rope 150 and is tightened up in precision increase.Launch rope tensioning mechanism form by being installed to pulley wheel wheel shaft 139, the end portion bobbin 151 of 139', 151' and ratchet 152,152' in fixed position, to make when the top of pulley wheel wheel shaft 139 or 139', along with when screw driver rotates, their follow rotation.Ratchet 153,153' are attached to assembly pulley link spigot pin 134,134', and to allow end portion bobbin 151,151' maintains pulley wheel wheel shaft 139,139' tightens up rear transmitting rope tension mode comes mesh ratchet gear 152,152'.

Removable assembly pulley can be attached to arbitrary far-end or near-end spring members, and described far-end or near-end spring members are disposed multiple being configured to and made each pulley in group independent of multiple pulleys that other pulley rotates.

But alternately, each winding of launching rope can connect multiple pulley being attached to spring end, and each removable assembly pulley has single pulley.

Figure 16 A-B is the top view with the arrow keeping system that spring stretches and arrow loading and spring contraction arrow do not load.In addition, illustrated by Figure 16 A-B, elasticity projectile propulsion system 100 can be configured to have extensive different length transmitting arrow and than the traction of device or the shorter arrow of the length of power stroke.When being attached at the arrow keep-spring 115 in elongated external frame 111 when launching rope latch 170, intermediate point between 170' and remote spring wall 220, arrow keep-spring 115 keeps the contact with the such as projectile of arrow 10 during the whole power stroke launching rope 150.Described configuration is guaranteed that the hole left in spring wall 220 does not produce with spring wall 220 by the arrow 10a of the projectile of such as arrow 10 and is contacted.Consequently, and not containing compared with any other longer, heavier arrow revised to elasticity projectile propulsion system 100, arrow that is shorter, lighter in weight can be launched safely and obtain higher arrow speed.

Method

Method comprises the operation of above disclosed device.In fact, user obtains linear projectile, such as arrow, installs projectile and launch rope to engage in the cylinder of device.Once projectile is fastened in device, user rear to direction on draw projectile with stretch launch rope and stretch each front springs and back spring.Afterwards, user is released in the traction (such as, by pulls trigger, discharge and launch rope etc.) on projectile, and this makes energy be delivered to projectile from the spring of tension and transmitting rope.Alternatively, the linear projectile of such as arrow can be fastened in device after transmitting rope is strained completely, and afterwards, user is released in traction on projectile (such as, by pulls trigger, discharge and launch rope etc.), this makes energy be delivered to projectile from the spring of tension and transmitting rope.

Test

Illustrated by Fig. 8 A-8C, various being configured to of test propulsive mechanism determines excellent arrow speed.In all tests, in order to launch the arrow of 1 ounce (28.35 grams), 33.5 inches (85.09 centimetres), power stroke is 30 ", wherein flight speed is used subsequently board doppler velocity sensor instrument is measured.

As shown in Figure 8 A, propulsion plant is configured to make front pulley 126a, 126b be attached to the distal securing portion of central orbit along with the removable assembly pulley 125 of far-end and keep static.Front springs parts 120,120' and Rear springs parts 130,130' be connected to be attached to the removable assembly pulley 135 of near-end series in.The rate results of a test is 163 feet per seconds (4968 cels).

As in fig. 8 a, the embodiment of Fig. 8 B uses four identical springs (two springs are positioned on every side of elongated center track 110), but, front springs parts 120 are attached to the far-end of elongated center track 110, and wherein the removable assembly pulley 125 of far-end is attached to (comprising two pulley wheels) near-end of front springs parts 120,120'.String end directly terminates in the front springs just below the removable assembly pulley 125 of far-end.Initial spring tension is identical relative to the example described by Fig. 8 A.Transmitting rope 150 or bowstring are advanced around four pulley wheels in each removable assembly pulley.Three test flight results are:

1) 197 feet per seconds (6005 cel),

2) 199 feet per seconds (6066 cel),

3) 196 feet per seconds (5974 cel).

The change of speed may be shelve due to the arrow slightly adjusted between each test to cause.

Propulsive mechanism as seen in fig. 8 c is also configured to as shown in figs. 1 a-b, wherein in two removable assembly pulleys, only utilizes three pulley wheels.Two pulley wheels 126a, 126b are placed in the removable assembly pulley 125 of far-end of the near-end being attached to the front springs parts 120 that far-end is placed, and a pulley wheel 136 is placed in the removable assembly pulley 135 being attached to near-end spring (in remote spring end), and string or transmitting rope 150 end directly terminate in near-end spring 130 place.Bowstring or transmitting rope 150 are advanced on the either side of central orbit around three pulley wheels now.The rate results of " test one " is 210 feet per seconds (6401 cels).Increase further by removing lax from transmitting rope significantly at bowstring or the initial tension launched in rope.When not measuring initial tension, not presenting to be separated and stretching spring coil.The rate results of " test two " is 228 feet per seconds (6949 cels).Initial tension increases to make initial tension depart from from spring further subsequently in bowstring or transmitting rope 150, and separate winding is no more than 1/8 ".The rate results of this test is 246 feet per seconds (7498 cels).

When use at test period the arrow of 270 grains the drawing length of 30 inches (76.2 centimetres) and the tractive force place of 781 pounds (35.38 kilograms) reach realize maximum speed to peak value 339 feet per second (1.033e+004 cel) time, find that some energy losses are in the transmitting rope 150 be stretched.Assuming that only use more sane transmitting rope 150 to produce much bigger speed.

Equally, draw a conclusion after velocity test: use identical springs silk and external diameter design and slightly increase its length and cause in power stroke, to generate the ability that identical or more energy accompanies by the remarkable reduction of drawing length.For example, identical springs design for all tests adds 0.9 in length " and cause drawing length to reduce 6 " creating the ability of the increase of in power stroke Foot-Pound about 2% simultaneously, all these has the tractive force of identical 78 pounds (35.38 kilograms).This launches tightening up of rope and increase the initial tension that the total amount being assigned to the power of the length of the traction stroke of shortening increases in the spring by relying on and realize.Also recognize that the raising of the more pulleys of increase and its pulley ratio caused uses shorter and more powerful spring to distribute their power on similar or much bigger drawing length by allowing.Have reason to believe that following test may disclose the increase of the arrow speed being matched with the drawing length of reduction along with shorter lighter arrow, wherein raising power stroke power a little will produce higher speed.Equally, general arrangement length can be reduced by the shorter drawing length consistent with compacter and maneuverable design.

The damage caused the whole system comprising elasticity projectile propulsion system 100 is assessed in the test carrying out shock mitigation system mentioned above, and described damage is because the transmitting of the such as projectile of arrow 10 does not meet the minimum Current standards of weight and tractive force ratio.The professional standard regulation certain ratio usually followed being arranged by international Gong Lie association (IBO) and maintained, described ratio illustrates that the usual tractive force for each pound at least weighs the arrow of 5 grains (producing arrow speed more than 290 feet per second (8839 cel) for bow).Test is that the arrow being low to moderate 270 grains (length is 30 ") by weight under the tractive force of 78 pounds (35.38 kilograms) performs, and creates test rate (generation is significantly higher than the arrow speed of 290 feet per second (8839 cel)) of approximate 3.5 grains of the traction of every pound.Although test does not proceed to the point of failure, repeat its transmission does not produce any observable damage to elasticity projectile propulsion system 100.When do not perform dry play test (not containing arrow) time, believe that the parameter that can adjust described shock mitigation system is beaten and not damage elasticity projectile propulsion system 100 to realize doing.The stored energy that what propulsion system 100 represented reuptake after discharge is not applied on arrow and therefore launch the ability of lighter arrow compared with the bow system of routine under identical tractive force, provides and increases arrow speed and can increasing traction or cause the advantage of the corresponding damage ability aspect to system.

Although illustrate and describe the preferred embodiments of the present invention in this article, those skilled in the art should be clear, and this type of embodiment only provides as an example.Those skilled in the art will recognize a large amount of variant, change and replacement now without departing from the present invention.Should be understood that each replacement scheme of embodiments of the invention described herein may be used to put into practice the present invention.Expection claims define scope of the present invention, and therefore contain the method and structure in the scope of these claims and its equivalent.

Claims

1. a propulsion plant, is characterized in that, comprising:

A) elongated cartridge unit, it forms the chamber with elongated cartridge unit near-end and elongated cartridge unit far-end, wherein said elongated cartridge unit near-end engagement installation bracket,

B) a pair front springs parts, it has front springs member proximal end and front springs distal end separately, described a pair front springs parts are placed in the described chamber of described elongated cartridge unit, wherein said front springs distal end is connected to corresponding movable supporting frame and described front springs member proximal end is connected to removable assembly pulley

C) a pair Rear springs parts, each Rear springs parts have Rear springs member proximal end and Rear springs distal end, described a pair Rear springs parts are placed in the described chamber of described elongated cartridge unit, wherein said Rear springs distal end is connected to described removable assembly pulley and described Rear springs member proximal end is connected to described corresponding movable supporting frame

D) at least one pair of front pulleys, each front pulleys is couple to described front springs member proximal end and at least one rear pulleys, is connected to each described Rear springs distal end, and

E) launch rope, it has first end and the second end, and wherein said first end engages described front pulleys and the second end engages described rear pulleys.

2. propulsion plant according to claim 1, it is characterized in that, described a pair front pulleys and described rear pulleys comprise reaction assembly pulley pulley, when the described described bracket connecting end portion of rope towards described cylinder of launching is by the elastic energy be stored in reaction assembly pulley pulley couplings described during rear haulage in described front springs parts and described Rear springs parts.

3. propulsion plant according to claim 1, is characterized in that, comprises the track being positioned at described cartridge unit inside further.

4. propulsion plant according to claim 3, is characterized in that, described track can be configured to vertically to move and keeps flatly static simultaneously.

5. propulsion plant according to claim 1, is characterized in that, comprises firing lock further.

6. propulsion plant according to claim 1, is characterized in that, has 12 inches or less width.

7. propulsion plant according to claim 1, is characterized in that, comprises trigger sub-assembly further.

8. propulsion plant according to claim 1, is characterized in that, described transmitting rope is wound around more than three times or three times around described distal pulley wheels.

9. propulsion plant according to claim 1, is characterized in that, front springs parts combine with parallel group with Rear springs parts, wherein each group of one or more assembly pulley movably of engagement.

10. linearly shoot an arrow a system, it comprises:

B) one or more front springs parts, each in described one or more front springs parts has front springs member proximal end and front springs distal end, described one or more front springs parts are placed in the described chamber of described elongated cartridge unit, the described far-end of wherein said one or more front springs parts is connected to movable supporting frame and the described near-end of described front springs parts is connected to removable assembly pulley

C) one or more Rear springs parts, each in described one or more Rear springs parts has Rear springs member proximal end and Rear springs distal end, described one or more Rear springs parts are placed in the described chamber of described elongated cartridge unit, the described far-end of wherein said one or more Rear springs parts is connected to described removable assembly pulley and the described near-end of described Rear springs parts is connected to described corresponding movable supporting frame

D) one or more front pulleys, each in described one or more front pulleys is couple at least one and at least one rear pulleys in described one or more front springs member proximal end, is connected to the far-end of described Rear springs parts, and

11. linear archery systems according to claim 10, is characterized in that, comprise the track being positioned at described cartridge unit inside further.

12. linear archery systems according to claim 11, is characterized in that, described track can be configured to vertically to move and keeps flatly static simultaneously.

13. linear archery systems according to claim 10, is characterized in that, comprise firing lock further.

14. linear archery systems according to claim 10, is characterized in that having 12 inches or less width.

15. linear archery systems according to claim 10, is characterized in that, comprise trigger sub-assembly further.

16. linear archery systems according to claim 10, is characterized in that, described transmitting rope is wound around more than three times or three times around described distal pulley wheels.

Certainly contain propulsion system for 17. 1 kinds, it comprises:

C) a pair Rear springs parts, each have Rear springs member proximal end and Rear springs distal end, described a pair Rear springs parts are placed in the described chamber of described elongated cartridge unit, wherein said Rear springs distal end is connected to described removable assembly pulley and described Rear springs member proximal end is connected to corresponding movable supporting frame

D) a pair front pulleys, each front pulleys is couple to one and at least one rear pulleys in described front springs member proximal end, is connected to described Rear springs distal end, and

E) launch rope, it has first end and the second end, and wherein said first end engages described front pulleys and the second end engages described rear pulleys,

Wherein said a pair front pulleys and rear pulleys comprise reaction assembly pulley pulley, when the described described bracket connecting end portion of rope towards described cylinder of launching is by the elastic energy be stored in reaction assembly pulley pulley couplings described during rear haulage in described front springs parts and described Rear springs parts.

18. is according to claim 17 from containing propulsion system, it is characterized in that, comprise the track being positioned at described cartridge unit inside further.

19. is according to claim 18 from containing propulsion system, and it is characterized in that, described track can be configured to vertically to move and keeps flatly static simultaneously.

20. is according to claim 17 from containing propulsion system, it is characterized in that, comprise firing lock further.

21. is according to claim 17 from containing propulsion system, it is characterized in that having 12 inches or less width.

22. is according to claim 17 from containing propulsion system, it is characterized in that, comprise trigger sub-assembly further.

23. is according to claim 17 from containing propulsion system, it is characterized in that, described transmittings is restricted and be wound around more than three times or three times around described distal pulley wheels.

The method of 24. 1 kinds of action advances systems, said method comprising the steps of:

A) propulsion plant is provided, described propulsion plant has: a) elongated cartridge unit, it forms the chamber with elongated cartridge unit near-end and elongated cartridge unit far-end, wherein said elongated cartridge unit near-end engagement installation bracket, b) a pair front springs parts, it has front springs member proximal end and front springs distal end separately, described a pair front springs parts are placed in the described chamber of described elongated cartridge unit, the described far-end of wherein said front springs parts is connected to corresponding movable supporting frame and the described near-end of described front springs parts is connected to removable assembly pulley, c) a pair Rear springs parts, each Rear springs parts have Rear springs member proximal end and Rear springs distal end, described a pair Rear springs parts are placed in the described chamber of described elongated cartridge unit, wherein said Rear springs distal end is connected to removable assembly pulley and described Rear springs member proximal end is connected to corresponding movable supporting frame, d) a pair front pulleys, each front pulleys is couple to one and at least one rear pulleys in described front springs member proximal end, be connected to described Rear springs distal end, and e) launch rope, it has first end and the second end, wherein said first end engages described front pulleys and the second end engages described rear pulleys,

B) in backward directions, described transmitting rope is drawn to strain described transmitting rope and each in described front springs parts and Rear springs parts to be stretched toward each other, and

C) described rope of launching is discharged to provide from described back-moving spring and to launch the mutual of rope and energy transferring simultaneously.

The method of 25. action advances systems according to claim 24, is characterized in that, comprising:

Linear projectile is provided, and

Described linear projectile is placed on to engage described transmitting rope in the described cylinder of described propulsion system,

Described linear projectile is wherein provided and by described linear projectile the described step be placed in the described cylinder of described propulsion system be traction described launch rope step after perform.