Abstract: A stationary exercising device which promotes cardiovascular exercise yet minimizes impact to critical joints, particularly the ankles and knees. A frame supports a linkage assembly having at least one linkage member with a camming surface. The linkage assembly is in turn connected to a coupling assembly attached to the frame. Structure is included which permits each foot of the user to move the linkage assembly in such a manner as to generate a preferred closed path movement for the feet and a preferred arcuate path for the hands minimizing unnecessary stress in the joints yet permitting a cardiovascular workout of both lower and upper body muscle groups.

Abstract: A stationary exercising device which promotes cardiovascular exercise yet minimizes impact to critical joints, particularly the ankles and knees. A frame supports a linkage assembly having at least one linkage member with a camming surface. The linkage assembly is in turn connected to a coupling system attached to the frame. Structure is included which permits each foot of the user to move the linkage assembly in such a manner as to generate a preferred closed path movement for the foot in a preferred anatomical pattern minimizing unnecessary stress in the joints yet permitting a cardiovascular workout.

Abstract: A stationary recumbent exercising apparatus which promotes cardiovascular exercise yet minimizes impact to critical joints. A base frame supports a chair adapted to place the user in a recumbent position. The frame also supports a pair of reciprocating members supported within. The foot of the user is positioned on foot pads generally at one end of the reciprocating members. The pivotal linkage assemblies also include arm members which are operatively associated with the reciprocating movement of the foot portion of each reciprocating member. This provides for more natural movement of the ankle, knees and hips eliminating unnecessary stress on these joints yet permitting a cardiovascular workout. The arm members also provide for a corresponding upper body exercise.

Abstract: A mobile exercising apparatus which promotes cardiovascular exercise yet minimizes impact to critical joints. A frame supports a pair of reciprocating members which are displace generally horizontally along the frame at one end yet reciprocate in a circular motion at the other through a coupling system attached to the frame. Structure is included which permits each foot of the user to move in a generally elliptical path during exercise and drive a wheel thereby propelling the apparatus. This allows simulation of walking or running without impact. The device may include linkage to facilitate a corresponding upper body exercise involving movement of the arm in which case each hand of the user is displaced along an arcuate path.

Abstract: A stationary exercising device which promotes cardiovascular exercise yet minimizes impact to critical joints, particularly the ankles and knees. A frame supports a linkage assembly having at least one linkage member with a camming surface. The linkage assembly is in turn connected to a coupling system attached to the frame. Structure is included which permits each foot of the user to move the linkage assembly in such a manner as to generate a preferred closed path movement for the foot in a preferred anatomical pattern minimizing unnecessary stress in the joints yet permitting a cardiovascular workout.

Abstract: A stationary exercising apparatus which promotes cardiovascular exercise yet minimizes impact on critical joints through the generation of a predetermined elliptical path movement while maintaining foot platforms substantially parallel with the floor. A base structure supports a pair of reciprocating members which are displaced in a horizontal direction parallel with the floor at one end yet reciprocate in circular motion at the other end through a coupling system attached to the frame. A linkage assembly is included which operates in conjunction with the reciprocation of one end of the reciprocating members to maintain the foot platforms substantially parallel with a reference plane while revolving the foot platforms in a substantially elliptical path. The apparatus may include additional linkage to facilitate a corresponding upper body exercise involving movement of the arms along a predetermined arc.

Abstract: A stationary exercising device which promotes cardiovascular exercise yet minimizes impact to critical joints, particularly the ankles and knees. A frame supports a linkage assembly having at least one linkage member with a camming surface. The linkage assembly is in turn connected to a coupling system attached to the frame. Structure is included which permits each foot of the user to move the linkage assembly in such a manner as to generate a preferred closed path movement for the foot in a preferred anatomical pattern minimizing unnecessary stress in the joints yet permitting a cardiovascular workout.

Abstract: A mobile exercising apparatus which promotes cardiovascular exercise yet minimizes impact to critical joints. A frame supports a pair of reciprocating members which are displace generally horizontally along the frame at one end yet reciprocate in a circular motion at the other through a coupling system attached to the frame. Structure is included which orients the foot of the user at a preferred acute angular orientation and permits each foot to move in a generally elliptical path during exercise and drive a wheel thereby propelling the apparatus. This allows simulation of walking or running without impact. The device may include linkage to facilitate a corresponding upper body exercise involving movement of the arm in which case each hand of the user is displaced along an arcuate path.

Abstract: A stationary exercising device which promotes cardiovascular exercise yet minimizes impact to critical joints. A base frame supports a pair of reciprocating members which are displaced in a horizontal direction parallel with the floor at one end yet reciprocate in a circular motion at the other end through a coupling system attached to the frame. Structure is included which permits each foot of the user to move in a generally elliptical path during the climbing exercise. This provides for more natural movement of the knee and ankle joints minimizing unnecessary stress on the joints yet permitting a cardiovascular workout. The device may include linkage to facilitate a corresponding upper body exercise involving movement of the arm in which case each hand of the user is displaced along an arc or a substantially elliptical path, again promoting a more natural movement of the ankle, knee, elbow and shoulder joints and permitting a cardiovascular workout.

Abstract: A stationary exercising device which promotes cardiovascular exercise yet minimizes impact to critical joints, particularly the ankles and knees. A frame supports a linkage assembly having at least one linkage member with a camming surface. The linkage assembly is in turn connected to a coupling system attached to the frame. Structure is included which permits each foot of the user to move the linkage assembly in such a manner as to generate a preferred closed path movement for the foot in a preferred anatomical pattern minimizing unnecessary stress in the joints yet permitting a cardiovascular workout.

Abstract: A stationary exercising apparatus which promotes cardiovascular exercise yet minimizes impact to critical joints. A base frame supports a pair of reciprocating members which are displaced in a horizontal direction parallel with the floor at one end yet reciprocate in a circular motion at the other end through a coupling system attached to the frame. Structure is included which permits each foot of the user to move in a generally elliptical path during the climbing exercise. This provides for more movement of the foot platform in a substantially elliptical path while each foot platform, or a predetermined reference plane for each platform, remains substantially parallel with the floor through at least a portion of the lower half of the elliptical path proximate the forward end of the elliptical path.

Abstract: A crank assembly for use within an exercising device which promotes cardiovascular exercise yet minimizes impact on critical joints, particularly the ankles and knees. The crank assembly employs a dual coupler system which is interconnected for synchronized rotation. Linkage assemblies are provided which define a predetermined path having preferred anatomical pattern for foot movement of the user. The crank assembly can be used in an exercising device which promotes leg exercise primarily, or can be combined with two additional linkage assemblies to provide a combined hand motion with leg movement. In this manner, an enhanced cardiovascular workout is provided which minimizes stress on key joints, particularly the ankles and knees.

Abstract: A mobile exercising apparatus which promotes cardiovascular exercise yet minimizes impact to critical joints. A frame supports a pair of reciprocating members which are displace generally horizontally along the frame at one end yet reciprocate in a circular motion at the other through a coupling system attached to the frame. Structure is included which permits each foot of the user to move in a generally elliptical path during exercise and drive a wheel thereby propelling the apparatus. This allows simulation of walking or running without impact. The device may include linkage to facilitate a corresponding upper body exercise involving movement of the arm in which case each hand of the user is displaced along an arcuate path.

Abstract: An improved exercise apparatus, having two rails in parallel relation supported on a frame. Supported internally to each rail are two travellers, the four travellers for engagement with the limbs of the user. Each pair of travellers is supported internally to the rail one above the other, with the bottom travellers extending outwardly beyond the sides of the apparatus. The travellers ride within grooves in the rails. Also supported within each rail is an endless chain means. When the travellers are coupled to the endless chain means, the user encounters a resistive force from a force resistance system. Each set of travellers is selectively coupled to the respective endless chain means.

Abstract: An exercise device for simulated swimming strokes is disclosed. A cabinet supported on a frame serves as a base and has a body supporting platform thereabove, one portion supporting the torso and parallel duplicate hinge portions supporting the legs of the user. The user's arms reciprocate cable means and the user's legs reciprocate pivotal push rods extending into the cabinetry for rotating power consuming means comprising independent arm and leg powered fly wheels respectively connected to arm and leg powered means.

Abstract: A composite racquetball racquet comprises a molded synthetic plastic frame member on which is adhesively bonded a generally U-shaped channel and a synthetic plastic bumper strip is adhesively bonded over the channel outer periphery at the outer head portion of the frame. Mechanical interlock formations are provided between the plastic frame member and the metal channel side walls.

Abstract: A composite racquetball racquet comprises a molded synthetic plastic frame member on which is adhesively bonded a generally U-shaped channel and a synthetic plastic bumper strip is adhesively bonded over the channel outer periphery at the outer head portion of the frame. Mechanical interlock formations are provided between the plastic frame member and the metal channel side walls.

Abstract: A racquet for use in racquet sports is disclosed. In the preferred and illustrated embodiment, a composite racquet construction is set forth which utilizes an extruded metal frame which accepts multilayered, laminated, fiber reinforced, resin material typically including an epoxy base with graphite or fiberglass therein. The extruded section receives the laminate material prior to curing wherein the metal extruded section serves as a mold. After curing, the composite frame has improved properties over the metal extrusion, alone, and enhances frame strength, rigidity and flexure characteristics. The extruded frame incorporates a central webbing which is subsequently drilled with holes for stringing the racquet.

Abstract: In the preferred embodiment of the well bore apparatus of the present invention disclosed herein, a new and improved well tool is provided with a plurality of tool-positioning members that are pivotally coupled to the body of the tool and adapted for movement between their respective retracted and extended positions. To control the movements of the tool-positioning members, a selectively-reversible electric motor is cooperatively coupled to the pivotal members in such a manner that upon operation of the motor in one rotational direction, the members are released so as to be free to respectively move toward their extended positions in response to a biasing force selected to extend the members at a predetermined rapid speed of travel. Upon reversal of the motor, the members are recoupled and returned to their retracted positions.

Abstract: A game racquet comprising a composite metal and plastic frame having a stringing section and a handle, the composite frame formed from an extruded metal channel member surrounding and substantially enclosing an extruded plastic core member, the extruded metal and plastic core member being bonded together to form a unitary metal-plastic composite frame, .Iadd.wherein the horizontal neutral axis of the core member is closely aligned with the horizontal neutral axis of the metal channel member .Iaddend.and a bumper strip covering the outer surface of the composite frame, the bumper strip having a central groove to receive and protect the stringing.