Abstract: A device for exercising Yoga has an elongated resiliently deformable element movable to a position in which it is concave but tends to become straight so that the practitioner holding the element is urged to bend forward.

Abstract: An archery bow is provided with a reverse stabilizer bar and a combined trigger and safety release mechanism. The reverse stabilizer bar tapers inwardly as it extends rearwardly from the bow and is made of a solid cross section so as to be capable of absorbing the shock of the bow when an arrow is released. An extension member is telescopically received within the rear of the stabilizer bar to provide variable length draw string positions. This telescoping extension member is provided with an offset end to mount a handle for receiving the combined trigger and safety release mechanism. The latter includes a cylindrical actuator spool which supports a rotatable arrow release member. The safety release mechanism is axially slidable on the actuator spool. Vertical movement of the safety release permits a trigger to be squeezed to shoot an arrow as the arrow release member rotates.

Abstract: Magazine for an immersed underwater crossbow containing a string and allowing for the rapid introduction by suction of the string and its natural arrangement by means of retracting means as well as its exit without difficulty.By pulling on the shank of the piston pump, a depression is produced within the magazine and the string rapidly enters the magazine across its end and, arranges itself naturally against the piston.One can thus arrange several meters without difficulty. The exit is accomplished in the same way.

Abstract: A variable resistance exercising device is described for executing isometric, isotonic and isokinetic exercises. The device includes a unitary, open-ended mandrel or bar which is shaped to define at least one shaft which is adapted to receive several turns of rope thereon, an open support loop for the rope situated near one end of the shaft, and an open guide loop at the other end of the shaft for holding the rope in proper engagement with the shaft. By virtue of the mandrel's open-ended construction, the rope may be easily engaged or disengaged from the device, and the resistance provided by the device may be changed quickly.

Abstract: The apparatus described herein includes a substantially rectangular and flat board having a longitudinal groove adapted to receive guide pins protruding from a disc-shaped weight resting on the upper surface of the board. The board is at an angle of about 30.degree. to 60.degree. with the floor or base on which the board is positioned. The raised end of the board is supported, preferably by an adjustable device, to provide the desired slant angle. Arms or straps are attached to the disc-shaped weight so that a person positioned at the raised end of the board can pull the weight upward along the surface of the board. The angle of the board allows a gravity force to be exerted on the weight, with the effect of gravity being increased by adjusting the slant of the board to a greater angle. Pulling the weight up the board and then releasing it gradually to allow its sliding back to a lower position and repeating the cycle, provides an effective exercising maneuver.

Abstract: A flexible force transmitting link assembly includes flexible links that extend between the bow limbs and are connectable to a bow string and bow limbs. Connecting link members extend rearwardly and connect a flexible link to a bow string. An arrow, when positioned for firing, engages one of the flexible links.

Abstract: A compound bow includes a pair of improved pivotally mounted cam assemblies having separate, specification profiled string cable segments and power cable segments constructed and arranged to produce a draw force curve representing a greater area of stored energy than that obtained with most existing compound bows. The draw length of the bow, among other parameters, is readily altered without compressing and dismantling the bow cable components by removing and replacing differently configured draw length cam modules associated with the power cable segments. Attachment and subsequent turning of each of the timing, string and power cables is easily accomplished by means of cable adjusters carried by each cam assembly.

Abstract: A hydrodynamic jumper is provided which can be interchangeably used by men, women and children alike in the water without substantial structural modification by simply adjusting its shoulder straps. The hydrodynamic jumper permits a large range of movement and controlled use of resistive forces. The hydrodynamic member includes an annular hydrodynamic member and shoulder straps which carry the annular hydrodynamic member about the waist of the user.

Abstract: An improved archery bowstring release aid is provided which has a preferably flexible, self-supporting resilient ledge generally perpendicular to the length of the release aid and having an opening for an arrow shaft, the opening being bordered by a pair of bowstring-engaging portions. A rear wrist-engaging support member, which can be in the form of a strap, rope or glove and a self-supporting intermediate portion interconnecting the ledge and rear support complete the release aid. The release aid is adapted to be positioned on the medial side of the archer's draw hand, with the bowstring-engaging portions of the ledge facing the archer's palm and temporarily supported by the curved archer's fingers. It may also include a transverse brace member across the intermediate portion. Upon reaching full draw, the archer relaxes his or her fingers and the release aid, particularly the ledge, and usually the intermediate portion, flexes to release the drawn bowstring to fire the arrow forward from the bowstring.

Abstract: A sling shot formed by two laterally-spaced guide members secured on a base member to project generally in the direction of propulsion and encompass a resilient member extending through the guide members and across the forward extremities thereof so as to engage a shot, arrow, or other projectile to enable efficient propulsion thereof.

Abstract: A ball pitching device having an arm brake assembly for a ball pitching machine is provided that rapidly decelerates the throwing arm of the machine once a ball has been released from the arm, thereby reducing unwanted oscillations of the throwing arm and prolonging the useful life of the pitching machine. The brake assembly includes a brake pad fixedly mounted to the throwing arm, and a generally arcuate brake shoe rotatable from a position wherein the throwing arm brake pad is frictionally engaged by the shoe once a ball has been released from the throwing arm, to a position spaced apart from the brake pad when the throwing arm is rotated for pitching of a ball.

Abstract: A compound archery bow has a main frame with a pair of rigid arms extending outwardly from a central handle portion. A cam member is rotatably journaled on the end of each arm and a bowstring is connectable between the cam members. A resilient member, preferably a pair of rubber tubes, interconnects the main frame and each cam member at a point offset from its axis. When the cam rotates as the bowstring is drawn, the point of attachment of the resilient member to the cam member is brought into general alignment with the cam axle and the point of attachment of the resilient member to the main frame. Forces generated on the cam member by the resilient member at full draw are thus substantially radial. Both points of attachment of the resilient members are adjustable, and the applied tension of the resilient members is adjustable as well. A pulley is rigidly connected to each cam member, and the pulleys are interconnected by a cable to cause both cam members to rotate correspondingly.

Abstract: In an archery bow having a rigid handle portion and a pair of non-flexing limbs connected with the respective ends thereof, a pair of cams are mounted at the respective ends of the handle portion. The respective ends of the bowstring are connected with the cams and entrained over pulleys at the free ends of the limbs. Resilient members, secured to the handle portion, bear against the camming surface of the cams. As the bowstring is drawn, the cams force the resilient members toward the respective ends of the handle portion and stop the bowstring at full draw at the limit of cam rotation against the resilient members.

Abstract: An archery bow assembly includes a bow, a hand grip, and a ball and socket joint establishing a universal connection between the hand grip and the bow. The ball and socket joint is mounted on the bow by a piston movable in a cylindrical cavity formed in a mounting block mounted to the bow. A bias spring acting on the piston causes key and slot members to firmly interfit with one another to prevent relative movement of the hand grip and the bow. The key and slot members are moved apart when the bow string is drawn to permit limited universal movement of the ball relative to the socket and, accordingly, the hand grip relative to the bow. Hydraulic fluid within the cavity and a valve associated with the piston dampen the return movement of the hand grip after the arrow is released. The location of the hand grip is adjustable in two dimensions to adapt to the style of grip of the archer.

Abstract: A pulley adapted to be mounted at each end of a bow and so constructed as to permit adjustments in the eccentric axis of rotation relative to a bow. Each pulley at the end of a bow includes a pair of annular grooves positioned in spaced relation around the periphery of the pulley. A first and second set of slots extend radially through the rim portion of each pulley and into the first and second annular grooves respectively. The sets of slots are diametrically opposed on the rim. The cable is reeved about each pulley and positioned in a selected pair of slots so that a preselected amount of cable is positioned on the pulleys corresponding to a preselected draw length and/or draw weight of the bow.

Abstract: An exercise apparatus comprising structure for performing exercises which includes a handbar for being grasped by the hands of a user, a bar for restraining the feet of the user and a padded member for restraining the thighs of the user, the padded member being adjustable in location relative to the structure for restraining the feet of the user such that said structure allows the user to stress the user's muscles in the range of motion where the greatest stress is imposed by an activity such as sprinting.

Abstract: Apparatus and method for exercising torso rotation muscles of a person and in which a user's body is supported in a generally upright seated position, upper and lower torso portions are engaged so as to restrict movement of the user's body to rotary movement of the upper torso relative to the lower torso about an axis extending longitudinally of the user's body, and force is imposed to resist such movement.

Abstract: A bow string mounted peep sight has the form of a wheel with an elongated hollow hub tightly receiving the bow string and spokes connecting the hub to a rim. When the bow is in a braced condition with the bow string vertical the rim and spokes are horizontal and when the bow is drawn the sight is very close to the archer's eye and the rim is tilted revealing to the archer's eye sighting openings between the hub and rim irrespective of any rotation of the sight which may occur due to twisting of the bow string.

Abstract: A hunting bow is provided with a device for repeatedly signalling the exact length of bow string draw for an archer. The indicator particularly includes magnetic switch disposed in a forward position with respect to the body of the bow so as to be able to accommodate the use of arrows having broadhead tips. Furthermore, the indicator is multiply adjustable not only to accommodate the various types of arrows which are currently employed, but also to provide controllable sensitivity. The device provides an indication that the arrow is being drawn straight back. Lastly, the draw length indicator is detachably mountable to many of the archery bows which are currently in use.

Abstract: An exercise dumbbell having wheel weights on each end thereof that are each detachably attached to a grip bar by locking tabs on the grip bar and complementary stops on each wheel weight. The weights are engageable with each other on the grip bar and are locked thereon by rotating each weight relative to the grip bar thereby interlocking the complementary stops with the locking tabs.