An exercise machine with a two directional pivoting user support assembly has a user support or platform which supports the user and pivots about a first pivot axis during an exercise movement, and is also pivotable about at least one second pivot axis to involve the user's core muscles in balancing
An exercise machine with a two directional pivoting user support assembly has a user support or platform which supports the user and pivots about a first pivot axis during an exercise movement, and is also pivotable about at least one second pivot axis to involve the user's core muscles in balancing and maintaining the user support in a stable position. A manually operable locking device with a simple flip switch lever is provided for selectively locking the user support against rotation about the second pivot axis, so that the user can easily chose whether to perform the exercise with a stable support or to add a level of difficulty by using the unstable seat mode and exercising core muscles during the exercise.
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1. A movable user support assembly for supporting a user in a seated or kneeling position while performing an exercise on an exercise machine, comprising: a base;a two directional pivoting user support associated with the base and configured to support a user in an exercise position while performing
1. A movable user support assembly for supporting a user in a seated or kneeling position while performing an exercise on an exercise machine, comprising: a base;a two directional pivoting user support associated with the base and configured to support a user in an exercise position while performing an exercise, the user support being rotatable about a first pivot axis during the exercise;a pivotal connection between the base and the user support defining at least one second, non-vertical pivot axis for tilting of the user support about said at least one second, non-vertical pivot axis in at least two opposite directions between first and second end positions, the user support having a centered support position between said end positions;a locking device which is configured to selectively lock the user support against tilting about the second non-vertical pivot axis, the locking device having a first, locking position defining a stable support mode in which the user support rotates about the first pivot axis only and is locked against tilting about the second, non-vertical pivot axis, and a second, released position defining an unstable support mode in which the user support is free to tilt about said second, non-vertical pivot axis between said end positions; and a stop assembly between the base and user support which defines the respective first and second end positions and limits tilting movement of the user support from said centered support position. 2. The user support assembly of claim 1, wherein said user support is configured for free tilting movement in opposite directions about said second, non-vertical pivot axis in the unstable support mode. 3. The user support assembly of claim 2, wherein the stop assembly comprises first and second end stops which engage the user support at respective opposite ends of a predetermined angular range to define the respective first and second end positions. 4. The user support assembly of claim 3, wherein the predetermined angular range is from zero to approximately 5 degrees. 5. The user support assembly of claim 1, wherein the second, non-vertical pivot axis extends transversely through the user support to allow side to side swiveling motion of the user support in the unstable support mode. 6. The user support of assembly of claim 1, wherein the user support has at least one user support pad having a rear end, a forward end, and a central axis between the rear and forward ends, and the user support pad is configured for engagement by a user's knees and lower legs on opposite sides of the central axis with the user in a kneeling position. 7. The user support assembly of claim 1, wherein the user support has at least one user support pad configured to support a user in a seated position. 8. The user support assembly of claim 1, wherein the locking device comprises a first lock part having an opening and a second part comprising a releasable locking pin movable between a locked position engaging the opening to prevent rotation of the user support about the second non-vertical pivot axis and an unlocked position retracted from the opening, one of the lock parts being associated with the user support and the other lock part being associated with the base. 9. The user support assembly of claim 8, wherein the user support includes a user support platform and a user support pad on top of the platform on which the user is supported during an exercise, the first lock part comprises a lock plate secured to the user support platform and extending downwards from the platform and the second part is mounted on the base. 10. The user support assembly of claim 8, wherein the first lock part is secured to the base and the second part is secured to the user support. 11. An exercise machine, comprising: a stationary main frame;a user support assembly mounted on the main framethe user support assembly comprising a base pivotally mounted on the main frame for rotation about a first, vertical pivot axis, a user support adapted to support a user in an exercise position during an exercise, and a pivot connection between the user support and the base configured for allowing tilting of the user support about at least one second, non-vertical pivot axis in at least two opposite directions from a centered user support position;an exercise arm assembly movably mounted relative to the main frame and having a user engaging portion which is adapted for engagement by a part of a user's body to perform an exercise when a user is supported in an exercise position on the user support; anda locking device between the user support and the base which is configured to selectively lock the user support against tilting about the second, non-vertical pivot axis, the locking device comprising a lock pin, a pin housing having a fixed rear edge, and a cam member attached to the lock pin, the locking device having a first, locking position defining a stable support mode in which the user support is locked against tilting about the second, non-vertical pivot axis during an exercise and the lock pin extends out of the lock pin housing, and a second, released position defining an unstable support mode in which the user support is free to tilt about said second, non-vertical pivot axis during an exercise and the cam member and the attached lock pin are forced into a retracted position by the fixed rear edge of the pin housing. 12. The exercise machine of claim 11, further comprising a stop assembly between the base and user support which defines respective first and second end positions and limits tilting of the user support in the unstable support mode in each direction from said centered support position to a predetermined angular range. 13. The exercise machine of claim 12, wherein the stop assembly comprises first and second end stops defining the respective first and second end positions. 14. The exercise machine of claim 11, wherein the first vertical pivot axis is perpendicular to the second, non-vertical pivot axis. 15. The exercise machine of claim 11, further comprising a connecting linkage between the user support assembly and exercise arm assembly which links movement of the exercise arm assembly during an exercise to movement of the user support assembly about said first pivot axis, and a load which resists movement of at least one of the user support assembly, the exercise arm assembly and the connecting linkage. 16. The exercise machine of claim 13, wherein the user support includes a user support platform and the second, non-vertical pivot axis is a tilting pivot axis in a plane parallel to the user support platform. 17. The exercise machine of claim 16, wherein the end stops comprise resilient bumpers mounted on one of the base and the user support platform on opposite sides of the tilting pivot axis. 18. The exercise machine of claim 17, wherein the end stops are resilient bumpers mounted on the base. 19. The exercise machine of claim 11, wherein the locking device comprises a first lock part having an opening and a second part comprising a releasable locking pin movable between a locked position engaging the opening to prevent tilting of the user support about the second, non-vertical pivot axis and an unlocked position retracted from the opening, one of the lock parts being associated with the user support and the other lock part being associated with the base. 20. The exercise machine of claim 19, wherein the user support includes a user support platform and a user support pad on top of the platform on which the user is supported during an exercise, the first lock part comprises a lock plate secured to the user support platform and extending downwards from the platform and the second part is mounted on the base. 21. The exercise machine of claim 19, wherein the first lock part is secured to the base and the second part is secured to the user support. 22. The exercise machine of claim 19, wherein the lock parts are located under the user support. 23. The exercise machine of claim 19, wherein the second part of the locking device further comprises a lock pin housing secured to the user support or base, the locking pin being slidably mounted in the lock pin housing for movement between an extended locked position engaging the opening and a retracted, unlocked position, and a manually operable lock release tab mounted for rotation relative to the housing between first and second end positions corresponding to the locked and unlocked positions of the locking pin. 24. The exercise machine of claim 23, wherein the second part further comprises a cam member associated with the lock release tab and configured to urge the locking pin into the extended locked position on rotation of the lock release tab from the first to the second end position, and a biasing spring in the lock pin housing configured to urge the locking pin back into the retracted, unlocked position on rotation of the lock release tab from the second to the first end position. 25. The exercise machine of claim 23, further comprising a sleeve rotatably mounted on the housing, the manually engageable lock tab being mounted on the sleeve and extending radially outward from the sleeve. 26. The exercise machine of claim 16, wherein the user support comprises a user support platform configured to support a user in a generally forward facing direction. 27. The exercise machine of claim 26, wherein the tilting pivot axis extends beneath the user support platform in a plane parallel to the user support platform in a direction generally towards the forward end of the main frame at a start position of an exercise, and is configured for side-to-side tilting movement of the user support platform to the right and left of the centered user support position. 28. The exercise machine of claim 11, wherein the machine is a rotary torso exercise machine. 29. The exercise machine of claim 11, wherein the machine is an abdominal exercise machine. 30. A rotary torso exercise machine, comprising: a main frame;a lower torso support rotatably mounted on the frame for rotation about a first, vertical axis between a forward facing position and opposite left and right swiveled positions, the lower torso support confined to support a lower torso of a user;an upper torso support mounted on the frame for supporting the upper torso of the user in a fixed position while the lower torso is rotated;the lower torso support comprising a base mounted on the frame for rotation about the first, vertical axis between left and right swiveled positions and the forward facing position, and an unstable user support platform pivotally mounted on the base for rotation in at least two opposite directions between a centered orientation and first and second tilted orientations about at least one second, non-vertical pivot axis;a locking device between the user support platform and the base which is configured to selectively lock the user support platform against rotation about the second pivot axis, the locking device having a first, locking position defining a stable support mode in which the user support platform is locked against rotation about the second pivot axis during an exercise, and a second, released position defining an unstable support mode in which the user support platform is free to rotate about said second pivot axis during an exercise; anda stop assembly between the base and user support platform configured to limit tilting of the user support platform to a predetermined angular range between the centered position and each tilted orientation. 31. The exercise machine of claim 30, wherein the left and right swiveled positions are adjustable to provide adjustable left and right starting positions for a user's lower torso when performing a rotary torso exercise. 32. The exercise machine of claim 31, further comprising a load which resists rotation of the user support platform from the left or right starting position to the forward facing position. 33. The exercise machine of claim 30, wherein the second pivot axis is horizontal and the centered orientation of the user support platform lies in a horizontal plane. 34. The exercise machine of claim 30, wherein the user support platform has at least one user support pad having knee support portions configured to support a user's knees and at least part of the user's lower legs with the user in a kneeling position, and defining a center line of the pad extending between the knee support portions. 35. The exercise machine of claim 34, wherein the second pivot axis is beneath and parallel to the center line of the user support pad and configured for side-to-side tilting movement of the user support platform to the right and left of the centered orientation. 36. The exercise machine of claim 30, wherein the locking device comprises a first lock part having an opening and a second part comprising a releasable locking pin movable between a locked position engaging the opening to prevent rotation of the user support platform about the second pivot axis and an unlocked position retracted from the opening, one of the lock parts being associated with the user support platform and the other lock part being associated with the base. 37. The exercise machine of claim 36, wherein the first lock part comprises a lock plate secured to the user support platform and extending downwards from the platform and the second part is mounted on the base. 38. The exercise machine of claim 36, wherein the lock parts are located under the user support platform. 39. The exercise machine of claim 37, wherein the second part of the locking device further comprises a lock pin housing secured to the base, the locking pin being slidably mounted in the lock pin housing for movement between an extended locked position engaging the opening and a retracted, unlocked position, and a manually operable lock release tab mounted for rotation relative to the housing between first and second end positions corresponding to the locked and unlocked positions of the locking pin. 40. The exercise machine of claim 39, wherein the second part further comprises a cam member associated with the lock release tab and configured to urge the locking pin into the extended locked position on rotation of the lock release tab from the first to the second end position, and a biasing spring in the lock pin housing configured to urge the locking pin back into the retracted, unlocked position on rotation of the lock release tab from the second to the first end position. 41. The exercise machine of claim 39, further comprising a sleeve rotatably mounted on the housing, the manually operable lock release tab being mounted on the sleeve and extending radially outward from the sleeve.
Hoover Richard L. (5928 E. Dynamite Blvd. Carefree AZ 85377) Rountree Wendy (137 W. Libby St. Phoenix AZ 85023), Combination chair and exercise apparatus and method therefor.
Wilkinson William T. (Severnside Farm ; 300 Kyle Rd. Crownsville MD 21032-0572) Nelson John J. (Levitown PA), Combination twister and stepper exercise device.
Webber, Randall T.; Brennan, Christopher E.; Hockridge, Bruce; Meredith, Jeffrey O., Upper back exercise machine with self-aligning pivoting user support.
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