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US 4,787,626 AGranted
Sit-up support device
AssigneeNone recorded
InventorTimothy Gallagher
Life of this patent
Estimating the term…
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AssigneeNone recorded
InventorTimothy Gallagher
Estimating the term…
This sit-up support device is designed to hold a person's feet when they are performing bent knee sit-ups. Primarily, it consists of a base plate that is rendered stationary to the floor by a clamp that fastens to a door. The device also includes quick-release straps on the base plate, for comfortably holding the user's feet, and a threaded shaft and sleeve are provided in conjunction with the clamp, to force the base plate hard down to the floor.
A sit-up support device comprising, a substantially rectangular base including foot strap means, a clamp adapted to be secured to a door bottom by clamp screw means, hinge means pivotally connecting said base to said clamp, and an adjustable length shaft means connected between said base and said clamp so as to prevent upward movement of said base.
Dependencies are inferred from the claim text.
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No related US applications are recorded in the indexed filing history.
On a door or a door frame: for anchoring between a door and the floor
On a door or a door frame: for anchoring on a door
Abdomen: moving torso with immobilized lower limbs
Exercise devices: removably attached to wheelchair, home furnishing, or home structure
Term ended 3 Jul 2006 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
1. Field of the Invention
This invention relates to devices for physical fitness, and more particularly, to a sit-up support device.
2. Description of Prior Art
FIG. 1 is a perspective view of the present invention, showing the straps partly broken away;
FIG. 2 is a cross-sectional view, taken along the line 2--2 of FIG. 1;
FIG. 3 is a fragmentary perspective view of a modified form of door clamp for the invention;
A sit-up support device attachable to a door, comprising a base with a door clamp attached and including hinge means. The base further includes adjustable strap means for holding the feet of the user.
Accordingly, a device 10 is shown to include a rectangular base 11 having spaced cut-outs 12 therethrough. A rod 13 transverses the cut-outs 12 and strap brackets 14 are received on rod 13 and brackets 14 are secured to quick-release and adjustable straps 15 that are provided for holding the user's feet, whether they are in shoes or not. A hinge 16 is fixedly secured to one longitudinal side edge of base 11 at one end and is similarly secured to the bottom of a "U"-shaped clamp 17 that is designed to be received under a door 18 to hold device 10 stationary to the floor. Clamp 17 is provided with a set screw 19 for fastening clamp 17 to the door 18, and an internally threaded sleeve 20 is provided with an end fork 21 that is pivotally secured to a bracket 22 by a pin 22a. Bracket 22 is fixedly secured to clamp 17 and sleeve 20 threadingly receives a threaded shaft 23 that has a fork 23a fixedly secured to one end. A pivot pin 24 is received through fork 23a and a bracket 25 which is fixedly secured to the top center of base 11, and a knurled wing nut 26 is provided on shaft 23, so as to lock the adjustment of shaft 23 in sleeve 20 when nut 26 is in engagement with the bottom end of sleeve 20.
In use, device 10 clamps to the bottom of the door 18 by tightening the clamp 13 with the screw 19. The shaft 23 and the sleeve 20 are telescopingly adjusted until the base 11 is securely pressed to the floor. After the above have been effected, the user places both feet on the base 11 and places the nylon straps 15 thereon, and tightens straps 15 to a point where they are comfortable to the user.