Rebound exerciser

Claim 2

A rebound exerciser kit having component parts capable of being assembled at a given site so as to provide a rebound exerciser for use by an individual, the exerciser kit comprising: a frame means formed of two substantially symmetrical sections disposed opposite one another, each frame section having two end portions to provide two pairs of opposed end portions; a mat of flexible, resilient webbing; a plurality of coil springs, each of said plurality of coil springs having one end thereof releasably secured to said mat and the other end thereof releasably secured to said frame means; hinge and locking means for pivotally securing said symmetrical sections together and for releasably locking said sections during use of said exerciser, said hinge and locking means permitting said sections to be pivoted to a first compact position wherein said sections are spaced apart and superimposed to facilitate transportation and storage of said kit, said hinge and locking means further permitting said sections to be pivoted to a second extended position wherein said sections are in substantially the same plane to permit an individual to perform exercises on said mat, said hinge and locking means including two diametrically opposed hinge and locking assemblies, each said hinge and locking assembly including at least one plate means extending along each of said pairs of opposed end portions, a pivot member extending through each said plate means and each of said opposed end portions to provide two pairs of spaced pivot members, and a locking member extending through each plate means and each end portion between each of said pairs of spaced pivot members; and means for supporting said frame means in a position spaced above a surface onto which said rebound exerciser is placed, said supporting means adapted to be releasably secured to said frame means by manual manipulation when said sections are in said second extended position and adapted to be removed from said frame means by manual manipulation when said sections are in said first compact position.

Claim 3

The exerciser kit of claim 1 wherein said two symmetrical sections define a substantially hexagonal peripheral configuration in said second extended position.

Claim 4

The exerciser kit of claim 2 wherein said mat has a substantially hexagonal peripheral configuration.

Claim 5

The exerciser kit of claim 1 wherein said sections have an angular cross section which defines an outer portion and an upper portion.

Claim 6

The exerciser kit of claim 4 wherein each plate means comprises: a first elongated plate positioned contiguous to one face of the outer portion of said frame means; an elongated spacer plate positioned contiguous to the other face of the outer portion of said frame means; and a second elongated plate positioned contiguous to said elongated spacer plate, said pivot members and locking member for each of said opposed end portions extending through associated of said first, spacer, and second elongated plates, said elongated spacer plate and said second plate supporting said upper surface of said frame means when said sections are in said second extended position.

Claim 7

The exerciser kit of claim 5 wherein each of said first, spacer and second plates of each hinge assembly has a pair of spaced-apart, aligned bores therethrough which also extend through said frame means.

Claim 8

The exerciser kit of claim 6 wherein said locking member comprises: a substantially U-shaped rod having two threaded ends which are adapted to be inserted through said pair of spaced-apart, aligned bores when said sections are in said second extended position; and a pair of double threaded nuts adapted to be mated with said threaded ends when said threaded ends are inserted through said pair of bores so as to releasably secure said sections in said second extended position.

Claim 9

The exerciser kit of claim 1 wherein said frame means has a plurality of substantially cylindrical studs secured thereto and depending therefrom in substantially the identical direction, each of said studs having a channel formed therein intermediate the length thereof and having a resilient O-ring positioned in said channel, and wherein said supporting means comprising; a plurality of leg members corresponding in number to said plurality of studs, each of said leg members having a substantially hollow cylindrical configuration which has one closed end and one open end, and each of said leg members adapted to allow a separate one of said studs to be inserted through the open end thereof to compress said O-ring and form an interference fit therebetween.

Claim 10

The exerciser kit of claim 8 further comprising: means for gripping adapted to be releasably secured to an oppossed pair of said studs when said sections are in said first compact position so as to aid in manual transportation of said exerciser.

Claim 11

The exerciser kit of claim 9 wherein said gripping means comprises: a hollow, substantially cylindrical base having two open ends, said base adapted to be inserted over said opposed studs; a substantially U-shaped grip; and a pair of arm members having one end thereof secured at spaced apart locations about the circumference of said base, the other end of each of said pair of arm members being secured to a separate end of said grip, said base further adapted to be rotated about said opposed studs to position said grip and said pair of arm members within said frame means so as to facilitate storage of said exerciser kit.

Claim 12

The exerciser kit of claim 1 wherein each of said coil springs terminates in a first hook shaped end which is secured to said mat via one of a plurality of apertures formed in said mat and in a second hook shaped end which is secured to said frame means via one of a plurality of apertures formed in said frame means.

Claim 13

The exerciser kit of claim 11 wherein the shank of said second hook shaped end is of a substantially greater length than the shank of said first hook shaped end.

Claim 14

The exerciser kit of claim 11 further comprising: at least one wear bushing adapted to be inserted into at least one of said plurality of apertures formed in said frame means, said wear bushing having a first substantially cylindrical portion and a second substantially cylindrical portion having a substantially greater diameter than said first portion and being secured to said first portion, said first and second portions defining a shoulder therebetween which abuts said frame means when said wear bushing is inserted into said one aperture, said first and second portions having a bore therethrough adapted to receive said second hook shaped end of one of said coil springs.

Claim 15

The exerciser kit of claim 11 wherein said frame means and said mat have at least four sides and wherein each edge of said mat defines a channel having two open ends, said channel having a plurality of apertures formed along the length thereof and having at least one rod inserted therein, said at least one rod having a length substantially identical to the length of said edge.

Claim 16

The exerciser kit of claim 1 further comprising: a pad adapted to be affixed by means of a plurality of adhesive pile strips to corresponding strips of adhesive hooks secured to said frame means when said sections are in said second extended position, said pad thereby protecting said springs from damage and said individual from injury during use of said exerciser.

Claim 17

The exerciser kit of claim 11 wherein said frame means and said mat have at least four sides, said exerciser kit further comprising: means for simultaneously adjusting the exact location at which said second hook shaped end of a plurality of said coil springs which are utilized to secure one side of said mat to one side of said frame is secured to said frame means.

Claim 18

The exerciser kit of claim 16 wherein said frame means has a hexagonal peripheral configuration and wherein said adjusting means is utilized on three contiguous sides thereof.

Claim 19

A rebound exerciser for use by an individual in performing a variety of exercises, the exerciser comprising: a frame means formed of two substantially symmetrical sections disposed opposite one another, each frame section having two end portions to provide two pairs of opposed end portions; a mat of flexible, resilient webbing; a plurality of coil springs, each of said plurality of coil springs having one end thereof releasably secured to said mat and the other end thereof releasably secured to said frame means; hinge and locking means for pivotally securing said symmetrical sections together and for releasably locking said sections during use of said exerciser, said hinge and locking means permitting said sections to be pivoted to a first compact position wherein said sections are spaced apart and superimposed to facilitate transportation and storage of said exerciser, said hinge and locking means further permitting said sections to be pivoted to a second extended position wherein said sections are in substantially the same plane to permit an individual to perform exercises on said mat, said hinge and locking means including two diametrically opposed hinge and locking assemblies, each said hinge and locking assembly including at least one plate means extending along each of said pairs of opposed end portions, a pivot member extending through each said plate means and each of said opposed end portions to provide two pairs of spaced pivot members and a locking member extending through each plate means and each end portion between each of said pairs of spaced pivot members; and means for supporting said frame means in a position spaced above a surface onto which said rebound exerciser is placed, said supporting means releasably secured to said frame means by manual manipulation when said sections are in said second extended position and adapted to be removed from said frame means by manual manipulation when said sections are in said first compact position.

Claim 20

A rebound exerciser for use by an individual in performing a variety of exercises, the exerciser comprising: a frame means formed of two substantially symmetrical sections disposed opposite one another, each frame section having two end portions to provide two pairs of opposed end portions; a mat of flexible, resilient webbing; a plurality of coil springs, each of said plurality of coil springs having one end thereof releasably secured to said mat and the other end thereof releasably secured to said frame means; hinge and locking means for pivotally securing said symmetrical sections together and for releasably locking said sections during use of said exerciser, said hinge and locking means permitting said sections to be pivoted to a first compact position wherein said sections are spaced apart and superimposed to facilitate transportation and storage of said exerciser, said hinge and locking means further permitting said sections to be pivoted to a second extended position wherein said sections are in substantially the same plane to permit an individual to perform exercises on said mat, said hinge and locking means including two diametrically opposed hinge and locking assemblies, each said hinge and locking assembly including at least one plate means extending along each of said pairs of opposed end portions, a pivot member extending through each said plate means and each of said opposed end portions to provide two pairs of spaced pivot members and a locking member extending through each plate means and each end portion between each of said pairs of spaced pivot members; and means for supporting said frame means in a position spaced above a surface onto which said rebound exerciser is placed, said supporting means releasably secured to said frame means by manual manipulation when said sections are in said second extended position and adapted to be removed from said frame means by manual manipulation when said sections are in said first compact position.

Claim 21

The exerciser of claim 18 wherein said two symmetrical sections define a substantially hexagonal peripheral configuration in said second extended position.

Claim 22

The exerciser of claim 19 wherein said mat has a substantially hexagonal peripheral configuration.

Claim 23

The exerciser of claim 18 wherein said sections have an angular cross section which defines an outer portion and an upper portion.

Claim 24

The exerciser of claim 21 wherein each plate means comprises: a first elongated plate positioned contiguous to the other face of the outer portion of said frame means; an elongated spacer plate positioned contiguous to the other fact of the outer portion of said frame means; and a second elongated plate positioned contiguous to said elongated spacer plate, said pivot members and locking member for each of said opposed end portions extending through associated of said first, spacer, and second elongated plates, said elongated spacer plate and said second plate supporting said upper surface of said frame means when said sections are in said second extended position.

Claim 25

The exerciser of claim 22 wherein each of said first, spacer and second plates of each hinge assembly has a pair of spaced-apart, aligned bores therethrough which also extend through said frame means.

Claim 26

The exerciser of claim 23 wherein said locking member comprises: a substantially U-shaped rod having two threaded ends which are inserted through said pair of spaced-apart, aligned bores when said sections are in said second extended position; and a pair of double threaded nuts mated with said threaded ends when said threaded ends are inserted through said pair of bores so as to releasably secure said sections in said second extended position.

Claim 27

The exerciser of claim 18 wherein said frame means has a plurality of substantially cylindrical studs secured thereto and depending therefrom in substantially the identical direction, each of said studs having a channel formed therein intermediate the length thereof and having a resilient O-ring positioned in said channel, and wherein said supporting means comprising; a plurality of leg members corresponding in number to said plurality of studs, each of said leg members having a substantially hollow cylindrical configuration which has one closed end and one open end, and each of said leg members having separate one of said studs inserted through the open end thereof to compress said O-ring and form an interference fit therebetween.

Claim 28

The exerciser of claim 18 wherein each of said coil springs terminates in a first hook shaped end which is secured to said mat via one of a plurality of apertures formed in said mat and in a second hook shaped end which is secured to said frame means via one of a plurality of apertures formed in said frame means.

Claim 29

The exerciser of claim 26 wherein the shank of said second hook shaped end is of a substantially greater length than the shank of said first hook shaped end.

Claim 30

The exerciser of claim 26 further comprising: at least one wear bushing inserted into at least one of said plurality of apertures formed in said frame means, said wear bushing having a first substantially cylindrical portion and a second substantially cylindrical portion having a substantially greater diameter than said first portion and being secured to said first portion, said first and second portions defining a shoulder therebetween which abuts said frame means, said first and second portions having a bore therethrough to receive said second hook shaped end of one of said coil springs.

Claim 31

The exerciser of claim 26 wherein said frame and said mat have at least four sides and wherein each edge of said mat defines a channel having two open ends, said channel having a plurality of apertures formed along the length thereof and having at least one rod inserted therein, said at least one rod having a length substantially identical to the length of said edge.

Claim 32

The exercisser of claim 18 further comprising: a pad affixed by means of a plurality of adhesive pile strips to corresponding strips of adhesive hooks secured to said frame means when said sections are in said second extended position, said pad thereby protecting said spring from damage and said individual from injury during use of said exerciser.

Claim 33

The exerciser of claim 26 wherein said frame means and said mat have at least four sides, said exercise further comprising: means for simultaneously adjusting the exact location at which said second hook shaped end of a plurality of said coil springs which are utilized to secure one side of said mat to one side of said frame is secured to said frame means.

Claim 34

The exerciser of claim 31 wherein said frame means has a hexagonal peripheral configuration and wherein said adjusting means is utilized on three contiguous sides thereof.

Claim 35

A rebound exerciser kit having component parts capable of being assembled at a given site so as to provide a rebound exerciser for use by an individual, the exerciser kit comprising: a frame means formed of two substantially symmetrical sections; a mat of flexible, resilient webbing; a plurality of coil springs, each of said plurality of coil springs having one end thereof releasably secured to said mat and the other end thereof releasably secured to said frame means; hinge means for pivotally securing said symmetrical sections together, said hinge means permitting said sections to be pivoted to a first compact position wherein said sections are spaced apart and superimposed to facilitate transportation and storage of said kit, said hinge means further permitting said sections to be pivoted to a second extended position wherein said sections are in substantially the same plane to permit an individual to perform exercises on said mat; and means for supporting said frame means in a position spaced above a surface onto which said rebound exerciser is placed, said supporting means adapted to be releasably secured to said frame means by manual manipulation when said sections are in said second extended position and adapted to be removed from said frame means by manual manipulation when said sections are in said first compact position, each of said coil springs terminating in a first hook-shaped end which is secured to said mat via one of a plurality of apertures formed in said mat and in a second hook-shaped end which is secured to said frame means via one of a plurality of apertures formed in said frame means, said frame means and said mat having at least four sides and each edge of said mat defining a channel having two open ends, said channel having a plurality of apertures formed along the length thereof and having at least one rod inserted therein, said at least one rod having a length substantially identical to the length of said edge, two opposed edges of said mat each having three rods inserted into said channel, the central rod being formed of a relatively flexible material to permit said sections to be pivoted on said first compact position.

Claim 36

A rebound exerciser kit having component parts capable of being assembled at a given site so as to provide a rebound exerciser for use by an individual, the exerciser kit comprising: a frame means formed of two substantially symmetrical sections; a mat of flexible, resilient webbing; a plurality of coil springs, each of said plurality of coil springs having one end thereof releasably secured to said mat and the other end thereof releasably secured to said frame means; hinge means for pivotally securing said symmetrical sections together, said hinge means permitting said sections to be pivoted to a first compact position wherein said sections are spaced apart and superimposed to facilitate transportation and storage of said kit, said hinge means further permitting said sections to be pivoted to a second extended position wherein said sections are in substantially the same plane to permit an individual to perform exercises on said mat; and means for supporting said frame means in a position spaced above a surface onto which said rebound exerciser is placed, said supporting means adapted to be releasably secured to said frame means by manual manipulation when said sections are in said second extended position and adapted to be removed from said frame means by manual manipulation when said sections are in said first compact position, each of said coil springs terminating in a first hook-shaped end which is secured to said mat via one of a plurality of apertures formed in said mat and in a second hook-shaped end which is secured to said frame means via one of a plurality of apertures formed in said frame means, said frame means and said mat having at least four sides and each edge of said mat defining a channel having two open ends, said channel having a plurality of apertures formed along the length thereof and having at least one rod inserted therein, said at least one rod having a length substantially identical to the length of said edge, two opposed edges of said mat each having three rods inserted into said channel, the central rod being formed of a relatively flexible material to permit said sections to be pivoted on said first compact position.

Claim 37

A rebound exerciser kit having component parts capable of being assembled at a given site so as to provide a rebound exerciser for use by an individual, the exerciser kit comprising: a frame means formed of two substantially symmetrical sections; a mat of flexible, resilient webbing; a plurality of coil springs, each of said plurality of coil springs having one end thereof releasably secured to said mat and the other end thereof releasably secured to said frame means; hinge means for pivotally securing said symmetrical sections together, said hinge means permitting said sections to be pivoted to a first compact position wherein said sections are spaced apart and superimposed to facilitate transportation and storage of said kit, said hinge means further permitting said sections to be pivoted to a second extended position wherein said sections are in substantially the same plane to permit an individual to perform exercises on said mat; means for supporting said frame means in a position spaced above a surface onto which said rebound exerciser is placed, said supporting means adapted to be releasably secured to said frame means by manual manipulation when said sections are in said second extended position and adapted to be removed from said frame means by manual manipulation when said sections are in said first compact position, each of said coil springs terminating in a first hook-shaped end which is secured to said mat via one of a plurality of apertures formed in said mat and in a second hook-shaped end which is secured to said frame means via one of a plurality of apertures formed in said frame means, said frame means and said mat having at least four sides, said exerciser kit further comprising means for simultaneously adjusting the exact location at which said second hook-shaped end of a plurality of said coil springs which are utilized to secure one side of said mat to one side of said frame is secured to said frame means, said frame means having an angular cross section defining an outer portion and an upper portion and said one side of said frame means having a plurality of spaced-apart, elongated apertures formed therein which correspond in number to said plurality of coil springs attached to said one side of said frame means, said adjusting means comprising at least one rod sized to extend across all of said plurality of apertures in said one side of said frame means, said at least one rod being positioned adjacent one face of said upper portion; and means for variably positioning said at least one rod with respect to said outer portion of said frame means so as to variably position said at least one rod with respect to said plurality of apertures in said upper portion of said one side, each said second hook-shaped end of said plurality of coil springs being inserted through a separate aperture of said plurality of elongated apertures via the other face of said upper portion and extending around said at least one rod so that variably positioning said at least one rod will correspondingly alter the tension of said coil springs.

Claim 38

A rebound exerciser kit having component parts capable of being assembled at a given site so as to provide a rebound exerciser for use by an individual, the exerciser kit comprising: a frame means formed of two substantially symmetrical sections; a mat of flexible, resilient webbing; a plurality of coil springs, each of said plurality of coil springs having one end thereof releasably secured to said mat and the other end thereof releasably secured to said frame means; hinge means for pivotally securing said symmetrical sections together, said hinge means permitting said sections to be pivoted to a first compact position wherein said sections are spaced apart and superimposed to facilitate transportation and storage of said kit, said hinge means further permitting said sections to be pivoted to a second extended position wherein said sections are in substantially the same plane to permit an individual to perform exercises on said mat; means for supporting said frame means in a position spaced above a surface onto which said rebound exerciser is placed, said supporting means adapted to be releasably secured to said frame means by manual manipulation when said sections are in said second extended position and adapted to be removed from said frame means by manual manipulation when said sections are in said first compact position, each of said coil springs terminating in a first hook-shaped end which is secured to said mat via one of a plurality of apertures formed in said mat and in a second hook-shaped end which is secured to said frame means via one of a plurality of apertures formed in said frame means, said frame means and said mat having at least four sides, said exerciser kit further comprising means for simultaneously adjusting the exact location at which said second hook-shaped end of a plurality of said coil springs which are utilized to secure one side of said mat to one side of said frame is secured to said frame means, said frame means having an angular cross section defining an outer portion and an upper portion and said one side of said frame means having a plurality of spaced-apart, elongated apertures formed therein which correspond in number to said plurality of coil springs attached to said one side of said frame means, said adjusting means comprising at least one rod sized to extend across all of said plurality of apertures in said one side of said frame means, said at least one rod being positioned adjacent one face of said upper portion; and means for variably positioning said at least one rod with respect to said outer portion of said frame means so as to variably position said at least one rod with respect to said plurality of apertures in said upper portion of said one side, each said second hook-shaped end of said plurality of coil springs being inserted through a separate aperture of said plurality of elongated apertures via the other face of said upper portion and extending around said at least one rod so that variably positioning said at least one rod will correspondingly alter the tension of said coil springs.

Claim 39

The excerciser kit of claim 34 wherein said variable positioning means comprises at least two bolts, each bolt having a head and a threaded shank which is mated with a separate threaded bore in said at least one rod, said head abuting said outer portion of said frame means.

Claim 40

The exerciser kit of claim 35 wherein said variable positioning means comprises four of said bolts.

Claim 41

A rebound exerciser for use by an individual in performing a variety of exercises, the exerciser comprising: a frame means formed of two substantially symmetrical sections; a mat of flexible, resilient webbing; a plurality of coil springs, each of said plurality of coil springs having one end thereof releasably secured to said mat and the other end thereof releasably secured to said frame means; hinge means for pivotally securing said symmetrical sections together, said hinge means permitting said sections to be pivoted to a first compact position wherein said sections are spaced apart and superimposed to facilitate transportation and storage of said exerciser, said hinge means further permitting said sections to be pivoted to a second extended position wherein said sections are in substantially the same plane to permit an individual to perfom exercises on said mat; and means for supporting said frame means in a position spaced above a surface onto which said rebound exerciser is placed, said supporting means releasably secured to said frame means by manual manipulation when said sections are in said second extended position and adapted to be removed from said frame member by manual manipulation when said sections are in said first compact position, each of said coil springs terminating in a first hook-shaped end which is secured to said mat via one of a plurality of apertures formed in said mat and in a second hook-shaped end which is secrued to said frame means via one of a plurality of apertures formed in said frame means, said frame means and said mat having at least four sides and each edge of said mat defining a channel having two open ends, said channel having a plurality of apertures formed along the length thereof and having at least one rod inserted therein, said at least one rod having a length substantially identical to the length of said edge, two opposed edges of said mat each having three rods inserted into said channel, the central rod being formed of a relatively flexible material to permit said sections to be pivoted to said first compact position.

Claim 42

A rebound exerciser for use by an individual in performing a variety of exercises, the exerciser comprising: a frame means formed of two substantially symmetrical sections; a mat of flexible, resilient webbing; a plurality of coil springs, each of said plurality of coil springs having one end thereof releasably secured to said mat and the other end thereof releasably secured to said frame means; hinge means for pivotally securing said symmetrical sections together, said hinge means permitting said sections to be pivoted to a first compact position wherein said sections are spaced apart and superimposed to facilitate transportation and storage of said exerciser, said hinge means further permitting said sections to be pivoted to a second extended position wherein said sections are in substantially the same plane to permit an individual to perfom exercises on said mat; and means for supporting said frame means in a position spaced above a surface onto which said rebound exerciser is placed, said supporting means releasably secured to said frame means by manual manipulation when said sections are in said second extended position and adapted to be removed from said frame member by manual manipulation when said sections are in said first compact position, each of said coil springs terminating in a first hook-shaped end which is secured to said mat via one of a plurality of apertures formed in said mat and in a second hook-shaped end which is secrued to said frame means via one of a plurality of apertures formed in said frame means, said frame means and said mat having at least four sides and each edge of said mat defining a channel having two open ends, said channel having a plurality of apertures formed along the length thereof and having at least one rod inserted therein, said at least one rod having a length substantially identical to the length of said edge, two opposed edges of said mat each having three rods inserted into said channel, the central rod being formed of a relatively flexible material to permit said sections to be pivoted to said first compact position.

Claim 43

A rebound exerciser for use by an individual in performing a variety of exercises, the exerciser comprising: a frame means formed of two substantially symmetrical sections; a mat of flexible, resilient webbing; a plurality of coil springs, each of said plurality of coil springs having one end thereof releasably secured to said mat and the other end thereof releasably secured to said frame means; hinge means for pivotally securing said symmetrical sections together, said hinge means permitting said sections to be pivoted to a first compact position wherein said sections are spaced apart and superimposed to facilitate transportation and storage of said exerciser, said hinge means further permitting said sections to be pivoted to a second extended position wherein said sections are in substantially the same plane to permit an individual to perform exercises on said mat; means for supporting said frame means in a position spaced above a surface onto which said rebound exerciser is placed, said supporting means releasably secured to said frame means by manual manipulation when said sections are in said second extended position and adapted to be removed from said frame member by manual manipulation when said sections are in said first compact position, each of said coil springs terminating in a first hook-shaped end which is secured to said mat via one of a plurality of apertures formed in said mat and in a second hook-shaped end which is secured to said frame means via one of a plurality of apertures formed in said frame means said frame means and said mat having at least four sides, said exerciser further comprising means for simultaneously adjusting the exact location at which said second hook-shaped end of a plurality of said coil springs which are utilized to secure one side of said mat to one side of said frame is secured to said frame means, said frame means having an angular cross section defining an outer portion and an upper portion and said one side of said frame means having a plurality of spaced-apart, elongated apertures formed therein which correspond in number to said plurality of coil springs attached to said one side of said frame means, said adjusting means comprising at least one rod sized to extend across all of said plurality of apertures in said one side of said frame means, said at least one rod being positioned adjacent one face of said upper portion; and means for variably positioning said at least one rod with respect to said outer portion of said frame means so as to variably position said at least one rod with respect to said pluraliy of apertures in said upper portion of said one side, each said second hook-shaped end of said plurality of coil springs being inserted through a separate aperture of said plurality of elongated apertures via the other face of said upper portion and extending around said at least one rod so that variably positioning said rod will correspondingly alter the tension of said coil springs.

Claim 44

A rebound exerciser for use by an individual in performing a variety of exercises, the exerciser comprising: a frame means formed of two substantially symmetrical sections; a mat of flexible, resilient webbing; a plurality of coil springs, each of said plurality of coil springs having one end thereof releasably secured to said mat and the other end thereof releasably secured to said frame means; hinge means for pivotally securing said symmetrical sections together, said hinge means permitting said sections to be pivoted to a first compact position wherein said sections are spaced apart and superimposed to facilitate transportation and storage of said exerciser, said hinge means further permitting said sections to be pivoted to a second extended position wherein said sections are in substantially the same plane to permit an individual to perform exercises on said mat; means for supporting said frame means in a position spaced above a surface onto which said rebound exerciser is placed, said supporting means releasably secured to said frame means by manual manipulation when said sections are in said second extended position and adapted to be removed from said frame member by manual manipulation when said sections are in said first compact position, each of said coil springs terminating in a first hook-shaped end which is secured to said mat via one of a plurality of apertures formed in said mat and in a second hook-shaped end which is secured to said frame means via one of a plurality of apertures formed in said frame means said frame means and said mat having at least four sides, said exerciser further comprising means for simultaneously adjusting the exact location at which said second hook-shaped end of a plurality of said coil springs which are utilized to secure one side of said mat to one side of said frame is secured to said frame means, said frame means having an angular cross section defining an outer portion and an upper portion and said one side of said frame means having a plurality of spaced-apart, elongated apertures formed therein which correspond in number to said plurality of coil springs attached to said one side of said frame means, said adjusting means comprising at least one rod sized to extend across all of said plurality of apertures in said one side of said frame means, said at least one rod being positioned adjacent one face of said upper portion; and means for variably positioning said at least one rod with respect to said outer portion of said frame means so as to variably position said at least one rod with respect to said pluraliy of apertures in said upper portion of said one side, each said second hook-shaped end of said plurality of coil springs being inserted through a separate aperture of said plurality of elongated apertures via the other face of said upper portion and extending around said at least one rod so that variably positioning said rod will correspondingly alter the tension of said coil springs.

Claim 45

The exerciser of claim 38 wherein said variable positioning means comprises at least two bolts, each bolt having a head and a threaded shank which is mated with a separate threaded bore in said at least one rod, said head abuting said outer portion of said frame means.

Claim 46

The exerciser of claim 39 wherein said variable positioning means comprises four of said bolts.