740results about "Spring guns" patented technology

A “cross-over” compound crossbow includes a stock and barrel assembly attached to a horizontally mounted compound bow. The compound bow component is similar to that of U.S. Pat. No. 7,047,958 and includes an alternative arrow support system to achieve higher arrow velocity at a reduced draw weight. The crossover compound bow also provides draw weight adjustability and positive cam synchronization.

A compound bow or crossbow employs bowstring cams with bowstring cam grooves and power cord cam grooves. Preferably a pair of generally identical power cord cam grooves are positioned axially above and below the bowstring cam groove. The power cords are anchored to a fixed anchor point, e.g., a pylon, on the near end of the riser or on the near side of the crossbow bar or stock. The power cords do not cross over to the other limb. The reduction in the number of cam wheels and pulleys and in the number of strings or cords results in greater efficiency and higher transfer of energy from the bow to the arrow or bolt. There is no drop-off in pull weight at full draw. The bolt or arrow accelerates throughout the travel of the bowstring, resulting in significantly higher velocity.

The nature of the current invention is an archery device that uses what I claim as Reverse Draw Technology. In essance, what this is, is pulling the launch string of a bow or crossbow in the opposite direction that it is pulled in all prior art. Pulling the launch string into the curve of the opposing limbs, instead of away from them, allows for a longer power stroke, thus increasing performance and allowing, if so chosen, a lower draw weight, which translates to less noise at the same arrow speed. Arrow speed is determined by the force required to pull the launch string from an at rest position to the ready to fire position, and the distance the string is pulled. This distance is called the power stroke. By increasing the power stroke and decreasing the drawing force, comparable arrow speed is achieved with much less noise and effort on the part of the archer.

A crossbow having an increased powerstroke and reduced noise. The powerstroke is increased by inverting the limb orientation from the standard crossbow arrangement and locating string guides at least partially forward and rearward of the ends of the limbs. The bowstring is drawn from the tops of the string guides to maximize the powerstroke, reducing noise and increasing the retained and delivered energy over existing crossbows.

An inverted compound archery bow including an extended-capacity cam system having two cams, each cam engaging the bowstring and separate cables extending to limbs of the bow. The bowstring and cables are counter-wound on the cams, producing tension opposite and proportional to the inverse ratio of windings. Drawing the bowstring winds the cables onto the cams, producing limb tension that propels an arrow when the bowstring is released. An arrow rest located between full-draw and rest excursions of the bowstring accommodates the extended draw length of the bow. A bowstring arrestor engages the bowstring at an intermediate-draw position. A slide stabilizes and supports a rear portion of the bow, and a receptacle on the slide engages an adapter for a bowstring release mechanism.

A crossbow having an increased powerstroke and reduced noise. The powerstroke is increased by inverting the limb orientation from the standard crossbow arrangement and locating string guides at least partially forward and rearward of the ends of the limbs. The bowstring is drawn from the tops of the string guides to maximize the powerstroke, reducing noise and increasing the retained and delivered energy over existing crossbows.

A trigger assembly has a housing, a trigger, a string holder, a bowstring catch biasing member, a safety pin, a safety lock, a pushing arm, a block, a block biasing member and a string stop. The housing has a mouth. The trigger has a trigger element and an actuating lever combined with the trigger element by dovetailed recess and protrusion. The bowstring catch has a string hook and a leg selectively engaging the hook on the actuating lever. The safety pin is moveably mounted in the housing and is supported on the actuating lever. The safety lock is moveably mounted in the housing and has a push rod. The pushing arm has a protrusion abutting the push rod. The block has a transverse rod selectively engaging the front end of the pushing arm. Accordingly, a trigger assembly with two safety features is provided.

A crossbow may include a main beam; a compound bow assembly mounted to the main beam including a riser and a pair of bow limbs; and a trigger mechanism mounted to the main beam for use in holding a bowstring in a cocked position. The crossbow may include wheels at opposite ends of the bow that operatively receive the bowstring. The wheels may be separated by a wheel distance (WD) when the crossbow is in an un-cocked position. The crossbow may also have a power stroke distance (PD) and the ratio WD / PD may be less than 2.0. The crossbow may include a foot stirrup being integral with the riser, the foot stirrup beginning behind the pair of bow limbs and extending beyond the bow limbs.

Compound bow in which a cable interfering with advance of an arrow is removed to improve shooting accuracy of the arrow, to prevent the distortion of the bow, and to simply manipulate equipment of the bow. The compound bow comprises: handle having fixing portions protruding from one surface thereof; wing units coupled to both ends of the handle; rotating units rotatably coupled to free ends of the wing units, respectively, by an eccentric shaft; a bow string connected between the respective rotating units; a pulley shaft-coupled to the fixing portion of the handle; cable members each having one end connected to each rotating unit and the other end connected to the free end of each wing unit via the pulley. Optionally tensioner member may be installed on one side of each cable member and ratchet member may be installed on the respective rotating units and wing units.

An archery bow includes a main riser frame with limbs extending therefrom. Each of the limbs has forward ends extended from the main riser frame. A bowstring has wound ends that are wound onto each of wheel cams that are attached to the limbs. The bowstring has a middle section that is not wound onto the wheel cams and that begins and ends at points on the wheel cams that are proximate to the farthest points along the wheel cams from the main riser frame. An elongate tube is mounted to the main riser frame through the central bore, and has a front handle attached to the elongate tube outer surface, and positioned between the first and second pairs of limbs. A push rod is slidably mounted at least partially inside the elongate tube, and has a rearward handle disposed outside the elongate tube rearward end.

Disclosed herein is a small unmanned air vehicle repulsing apparatus including a capturing body adapted to capture a drone, a target to be captured; and a capturing body launching apparatus adapted to launch the capturing body at the drone, in which the capturing body launching apparatus can quickly capture the drone by launching the capturing body even if the suspicious drone flies into an area to be protected so as to protect the interest and safety of law-abiding people.

In some embodiments, an archery bow comprises a rotatable member configured for rotation about a first rotatable member axis. A cable anchor is attached to the rotatable member and rotatable with respect to the rotatable member about an anchor axis. The anchor axis is offset from the rotatable member axis. The bow can further comprise a power cable anchored to said cable anchor.

A compound spring-loaded archery bow, which retains the appearance of a traditional bow, has a rigid bow frame that is formed by a central riser with a handgrip and arrow rest, an upper limb extending upward from the central riser and a lower limb extending downward from the central riser. Cam mechanisms are mounted at the upper end of the upper limb and the lower end of the lower limb and a bowstring is secured to and extends between the upper and lower cam mechanisms. When the bowstring is drawn from an initial preset position to shoot an arrow, there is a synchronized actuation of the upper and lower cam mechanisms. The upper and lower limbs are tubular and contain separate upper and lower spring assemblies for applying tension to the bowstring through the cam mechanisms only when the bowstring is drawn from its initial preset position. The degree of initial compression of the springs in the upper and lower spring assemblies can be independently adjusted to adjust the magnitude of the forces exerted on the bowstring by the assemblies when the bowstring is drawn to thereby set the maximum drawing force for the bowstring and the relative forces exerted on the bowstring by the assemblies.

A bow includes a bow frame with a geometric center, and a window surrounding the geometric center. A bow handle is attached to the bow frame at a position offset from the geometric center, such that a user can fire an arrow through the window, through the geometric center of the bow. A gimbal may be disposed within the window, the bow handle being pivotally attached to the gimbal, so as to allow free pivoting of the bow about two substantially orthogonal axes.

A rapid fire toy dart launch apparatus employing a feeding / anti-jamming mechanism including a simply yet unique continuous belt that penetrates a dart magazine releasing each dart from the magazine and simultaneously employing protrusion elements at the belt advancing each released dart into an energy generating mechanism for rapidly firing darts from the toy apparatus without mis-fed darts jamming up in the launcher.

Improved compound archery bow features a cable guard that separates the crossing inside cable segments allowing the intersection locus of the crossing cable inside segments to freely glide through the guard as the bow is drawn and released, a dual cam power pulley having a power lobe cam presenting a power cable race spiraling outward on a side face of an elliptical draw lobe cam presenting a draw-lobe cable race where the power cable winds as the inside drawstring cable segment unwinds from around the power cable race of the power lobe cam, and the outside drawstring cable segment unwinds from and winds-up around the draw-lobe cable race of the elliptical draw lobe cam as the bow is drawn and released, and bow-limb mounting and limb-pod structures at the respective ends of the bow riser for anchoring, aligning and supporting extending bow limbs for flexure.

An archery bow string vibration suppressor includes a telescoping arm having a hollow member and an internal slideable elongate shaft. A bumper is affixed to the distal end of the elongate shaft. Furthermore, the vibration suppressor includes a male threaded coupling for affixing the telescoping arm to the rear mounting hole of a bow. In additional embodiments, the vibration suppressor includes an offset adapter bracket for affixing the vibration suppressor to the rear mounting hole of a bow or extension adapter bracket for affixing the vibration suppressor to the front mounting hole of a bow.

An adjustable cam for a crossbow has a main disk, a weight-adjusting block and a length-adjusting block. The main disk has two sides, a group of string hooks, a group of weight-selecting holes, and a group of length-selecting holes. The group of string hooks is formed on one side of the main disk. The group of weight-selecting holes and the group of length-selecting holes are defined through the main disk in different areas. The weight-adjusting and the length-adjusting blocks are pivotally and coaxially mounted on the other side of the main disk. Each block has a securing hole to engage the one hole in a corresponding group. By attaching a bowstring to different string hooks and engaging the blocks to the corresponding hole in the groups, tension degrees and draw lengths are adjustable in various modifications to make the crossbow have versatile options to satisfy different users.