Weight-training apparatus having selectable weight plates

• US 7,121,988 B2
• Filed: 01/27/2005
• Issued: 10/17/2006
• Est. Priority Date: 01/27/2005
• Status: Active Grant

• Current Assignee: BowFlex, Inc.
• Original Assignee: DKB Group LLC
• Inventors: Walkerdine, Kenneth M.
• Primary Examiner(s): Crow, Stephen R.
• Assistant Examiner(s): Chhabra, Arun S.
• Application Number:
  US11/044,410
• Publication Number:
  US 20060189458A1
• Time in Patent Office: 628 Days
• Field of Search: 482105-109, 482/908
• US Class Current: 482/106
• CPC Class Codes: A63B 21/00065 by increasing or reducing the number of resistance units
• CPC Class Codes: A63B 21/0728 with means for fixing weights on bars, i.e. fixing olympic discs or bumper plates on bar-bells or dumb-bells
• CPC Class Codes: A63B 21/075 with variable weights , e.g. weight systems with weight selecting means for bar-bells or dumb-bells
• CPC Class Codes: A63B 71/0036 Accessories for stowing, putting away or transporting exercise apparatus or sports equipment A63B47/00, A63B55/00, A63B60/56 take precedence
• CPC Class Codes: Y10S 482/908 Adjustable

Abstract

An adjustable weight-training apparatus is provided having a plurality of weight plates, each of the weight plates including a protrusion. The weight-training apparatus has longitudinally opposing ends, each of the ends having longitudinally outer and inner groups of weight plates. A rotatable bar is also included in the apparatus and includes an inner control shaft and an outer control shaft. The inner control shaft is configured to rotate within the outer control shaft. The rotatable bar is configured to rotate within central holes of the weight plates. The inner control shaft has a first plurality of longitudinally spaced lobes. The inner control shaft is rotatable to position selected ones of the first plurality of lobes in engagement with the protrusions of selected weight plates of at least one of the outer groups of weight plates. The outer control shaft has a second plurality of longitudinally spaced lobes. The outer control shaft is rotatable to position selected ones of the second plurality of lobes in engagement with the protrusions of selected weight plates of at least one of the inner groups of weight plates.

Claims

1. An adjustable weight-training apparatus, comprising:

a plurality of weight plates, each of said weight plates having a protrusion, said weight-training apparatus having longitudinally opposing end portions, each of said ends portions having longitudinally outer and inner groups of said weight plates; and

a rotatable bar comprising an inner control shaft and an outer control shaft, said inner control shaft configured to rotate within and independently of said outer control shaft and said rotatable bar configured to rotate within central holes of said weight plates;

said inner control shaft having a first plurality of longitudinally spaced lobes, said inner control shaft being rotatable to position selected ones of said first plurality of lobes in engagement with said protrusions of selected weight plates of at least one of said outer groups of weight plates to secure said selected weight plates of said outer groups to said inner control shaft; and

said outer control shaft having a second plurality of longitudinally spaced lobes, said outer control shaft being rotatable to position selected ones of said second plurality of lobes in engagement with said protrusions of selected weight plates of at least one of said inner groups of weight plates to secure said selected weight plates of said inner groups to said outer control shaft.

2. The adjustable weight-training apparatus as recited in claim 1, further including a non-rotatable sleeve extending through said central holes, said rotatable bar being configured to rotate within said sleeve.

3. The adjustable weight-training apparatus as recited in claim 2, further including fins extending outwardly from and secured to said sleeve, said fins sized to pass through a slot of each of said weight plates, said slot extending generally vertically upwardly from said central hole to a periphery of said weight plates.

4. The adjustable weight-training apparatus as recited in claim 2, wherein said sleeve includes a pair of channels positioned at opposing ends thereof and configured to expose said first and second plurality of longitudinally spaced lobes.

5. The adjustable weight-training apparatus as recited in claim 2, further including an interior selector ring attached to said outer control shaft for rotation therewith.

6. The adjustable weight-training apparatus as recited in claim 5, further including a pair of interior dividers extending radially outwardly from said sleeve, one of said interior dividers being positioned proximate each of said inner groups of weight plates such that a gripping area is defined between said interior dividers.

7. The adjustable weight-training apparatus as recited in claim 6, wherein said gripping area is sized to provide one-handed access.

8. The adjustable weight-training apparatus as recited in claim 6, wherein abutting faces of one of said interior dividers and said interior selector ring include a detent device to resiliently retain said inner selector ring and said outer control shaft in a manually selected rotational position.

9. The adjustable weight-training apparatus as recited in claim 2, further including an exterior selector dial attached to said inner control shaft for rotation therewith.

10. The adjustable weight-training apparatus as recited in claim 9, further including an exterior divider positioned proximate each of said outer groups of weight plates.

11. The adjustable weight-training apparatus as recited in claim 10, wherein abutting faces of one of said exterior dividers and said exterior selector dial include a detent device to resiliently retain said exterior selector ring and said inner control shaft in a manually selected rotational position.

12. The adjustable weight-training apparatus as recited in claim 1, further including a holder, said holder including a plurality of depressions sized to accept and properly position said outer and inner groups of weight plates for connection to said rotatable bar.

13. The adjustable weight-training apparatus as recited in claim 12, further including locking means operable to normally prevent rotation of said inner and outer control shafts except when said apparatus is seated in said holder.

26. The adjustable weight-training apparatus as recited in claim 1, wherein said inner control shaft includes inner shaft extensions coupled to opposing ends of said inner control shaft for rotation therewith, each of said inner shaft extensions projecting longitudinally beyond a respective opposing end of said outer control shaft, and said first plurality of longitudinally spaced lobes being located on each of said inner shaft extensions, whereby said inner control shaft is rotatable to simultaneously secure selected weights from each of said outer groups of weight plates at each of said end portions of said apparatus to said inner control shaft;

and wherein said second plurality of longitudinally spaced lobes are positioned in proximity to said opposed ends of said outer control shaft, whereby said outer control shaft is rotatable to simultaneously secure selected weights from each of said inner groups of weight plates at each of said end portions of said apparatus to said outer control shaft.

14. An adjustable weight-training apparatus, comprising:

a plurality of weight plates, each of said weight plates having a central hole and a slot, said slot extending generally vertically upwardly from said central hole to a periphery of said weight plate, the width of said slot being smaller than the diameter of said central hole, and the intersection of one side of said slot and said central hole forming a protrusion, said weight-training apparatus having longitudinally opposing end portions, each of said end portions having longitudinally outer and inner groups of said weight plates;

a rotatable bar comprising an inner control shaft and an outer control shaft, said inner control shaft configured to rotate within and independently of said outer control shaft and said rotatable bar configured to rotate within said central holes;

said inner control shaft having a first plurality of longitudinally spaced lobes, said inner control shaft being rotatable to position selected ones of said first plurality of lobes in engagement with said protrusions of said central holes of selected weight plates of said outer groups of weight plates, to secure said selected weight plates of said outer groups to said inner control shaft; and

said outer control shaft having a second plurality of longitudinally spaced lobes, said outer control shaft being rotatable to position selected ones of said second plurality of lobes in engagement with said protrusions of said central holes of selected weight plates of said inner groups of weight plates, to secure said selected weight plates of said inner groups to said outer control shaft; and

a non-rotatable sleeve extending through said central holes, said rotatable bar being configured to rotate within said sleeve, said sleeve including a pair of channels positioned at opposing ends thereof and configured to expose said first and second plurality of longitudinally spaced lobes.

15. The adjustable weight-training apparatus as recited in claim 14, further including an interior selector ring attached to said outer control shaft for rotation therewith.

16. The adjustable weight-training apparatus as recited in claim 14, further including an exterior selector dial attached to said inner control shaft for rotation therewith.

17. The adjustable weight-training apparatus as recited in claim 14, further including fins extending outwardly from and secured to said sleeve, said fins sized to pass through said slots of said weight plates.

18. The adjustable weight-training apparatus as recited in claim 14, further including a pair of interior dividers extending radially outwardly from said sleeve, one of said interior dividers being positioned proximate each of said inner groups of weight plates such that a gripping area is defined between said interior dividers.

19. The adjustable weight-training apparatus as recited in claim 18, wherein said gripping area is sized to provide one-handed access.

20. The adjustable weight-training apparatus as recited in claim 18, wherein abutting faces of one of said interior dividers and said interior selector ring include a detent device to resiliently retain said inner selector ring and said outer control shaft in a manually selected rotational position.

21. The adjustable weight-training apparatus as recited in claim 14, further including an exterior divider positioned proximate each of said outer groups of weight plates.

22. The adjustable weight-training apparatus as recited in claim 21, wherein abutting faces of one of said exterior dividers and said exterior selector dial include a detent device to resiliently retain said exterior selector dial and said inner control shaft in a manually selected rotational position.

23. The adjustable weight-training apparatus as recited in claim 14, further including a holder, said holder including a plurality of depressions sized to accept and properly position said outer and inner groups of weight plates for connection to said rotatable bar.

24. The adjustable weight-training apparatus as recited in claim 23, further including locking means operable to normally prevent rotation of said inner and outer control shafts except when said apparatus is seated in said holder.

25. The adjustable weight-training apparatus as recited in claim 14, wherein said channels of said sleeve and said inner and outer shafts are configured and dimensioned such that when said inner and outer shafts are rotated to position at least one of said lobes to engage said protrusions of weight plates that are selected for connection to said rotatable bar, upward movement of said rotatable bar and sleeve lifts said selected weight plates upwardly, whereas all of said lobes that are not positioned to engage said protrusions of non-selected weight plates permit said rotatable bar and said sleeve to freely pass upwardly through said slots of said non-selected weight plates without lifting said non-selected weight plates.

27. The adjustable weight-training apparatus as recited in claim 14, wherein said inner control shaft includes inner shaft extensions coupled to opposing ends of said inner control shaft for rotation therewith, each of said inner shaft extensions projecting longitudinally beyond a respective opposing end of said outer control shaft, and said first plurality of longitudinally spaced lobes being located on each of said inner shaft extensions, whereby said inner control shaft is rotatable to simultaneously secure selected weights from said outer groups of weight plates at each of said end portions of said apparatus to said inner control shaft;

and wherein said second plurality of longitudinally spaced lobes are positioned in proximity to said opposed ends of said outer control shaft, whereby said outer control shaft is rotatable to simultaneously secure selected weights from said inner groups of weight plates at each of said end portions of said apparatus to said outer control shaft.

28. In a weight-training apparatus of the type having a plurality of longitudinally spaced weight plates arranged in groups adjacent the opposite end portions of the apparatus, the weight plates each having a central hole and a slot extending generally vertically upwardly from said central hole to a periphery of said weight plate, the width of said slot being smaller than the diameter of said central hole, and the intersection of one side of said slot and said central hole forming a protrusion, and a rotatable bar passing through said central holes and provided with a plurality of longitudinally spaced lobes selectively engageable with selected ones of said protrusions upon rotation of said bar, the improved method of selecting weight plates for securement to said bar comprising:

forming said bar of coaxial and independently rotatable inner and outer control shafts, said inner control shaft being rotatable within said outer control shaft;

rotating said inner control shaft to one or more predetermined positions to secure selected weight plates from a first sub-set of weight plates located adjacent the opposite end portions of the apparatus to said inner control shaft, and rotating said inner control shaft to other predetermined positions to unlock selected weights from said inner control shaft;

rotating said outer control shaft to one or more predetermined positions to secure selected weight plates from a second sub-set of weight plates located adjacent the opposite end portions of the apparatus to said outer control shaft, and rotating said outer control shaft to other predetermined positions to unlock selected weights from said outer control shaft, said first and second sub-sets of weight plates being mutually exclusive.

29. The method of claim 28 wherein rotation of said inner control shaft simultaneously selects corresponding weight plates from said first sub-set of weight plates at both opposite end portions of the apparatus.

30. The method of claim 28 wherein rotation of said outer control shaft simultaneously selects corresponding weight plates from said second sub-set of weight plates at both opposite end portions of the apparatus.