Exercise resistance device with magnets
First Claim
Patent Images
1. An exercise resistance device for use in an exercise apparatus of an overall size and configuration appropriate for bicycling-type exercise, the resistance device comprising:
- a rotatable shaft;
an impeller rotatable within a fluid filled sealed chamber; and
a rotating member joined for rotation with the rotatable shaft, the rotating member being external to the fluid filled sealed chamber and magnetically coupled to the impeller;
a housing forming the fluid filled sealed chamber, the housing including two joinable portions forming a stationary seal therebetween; and
a third housing portion joined to one of the two housing portions, the third housing portion supporting the rotating member in position to rotate and be magnetically coupled to the impeller.
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Accused Products
Abstract
An exercise resistance device for use in an exercise apparatus includes a rotatable shaft and an impeller rotatable within a fluid filled sealed chamber. A rotating member is joined for rotation with the rotatable shaft. The rotating member is external to the sealed chamber and is magnetically coupled to the impeller.
37 Citations
18 Claims
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1. An exercise resistance device for use in an exercise apparatus of an overall size and configuration appropriate for bicycling-type exercise, the resistance device comprising:
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a rotatable shaft;
an impeller rotatable within a fluid filled sealed chamber; and
a rotating member joined for rotation with the rotatable shaft, the rotating member being external to the fluid filled sealed chamber and magnetically coupled to the impeller;
a housing forming the fluid filled sealed chamber, the housing including two joinable portions forming a stationary seal therebetween; and
a third housing portion joined to one of the two housing portions, the third housing portion supporting the rotating member in position to rotate and be magnetically coupled to the impeller. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
a flywheel coupled to the shaft opposite the rotating member.
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4. The exercise resistance device of claim 1, wherein the stationary seal comprises an o-ring.
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5. The exercise resistance device of claim 1, further comprising stationary vanes mounted to the housing and disposed in the fluid filled sealed chamber.
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6. The exercise resistance device of claim 1, wherein the impeller includes a high-permeability magnetic material portion and at least one magnet.
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7. The exercise resistance device of claim 6, wherein the high-permeability magnetic material portion comprises a plate that is attached to the impeller and faces the rotating member, and wherein the magnet is joined to the plate between the plate and the impeller.
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8. The exercise resistance device of claim 6, wherein the rotating member includes a second high-permeability magnetic material portion and at least one magnet.
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9. The exercise resistance device of claim 8, wherein the second high-permeability magnetic material portion comprises a plate that is attached to the rotating member and faces the impeller, and wherein the magnet is joined to the plate between the plate and the rotating member.
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10. A bicycle exercise resistance device comprising:
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a support member;
a roller rotatable on the support member, the roller being adapted to engage a tire of a bicycle;
a rotatable shaft;
an impeller rotatable within a fluid filled sealed chamber;
a rotating member joined for rotation with the rotatable shaft, the rotating member being external to the fluid filled sealed chamber and magnetically coupled to the impeller;
a housing forming the fluid filled sealed chamber, the housing including two joinable portions forming a stationary seal therebetween; and
a third housing portion joined to one of the two housing portions, the third housing portion supporting the rotating member in position to rotate and be magnetically coupled to the impeller. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
a flywheel coupled to the shaft opposite the rotating member.
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13. The bicycle exercise resistance device of claim 10, wherein the stationary seal comprises an o-ring.
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14. The bicycle exercise resistance device of claim 10, further comprising stationary vanes mounted to the housing and disposed in the fluid filled sealed chamber.
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15. The bicycle exercise resistance device of claim 10, wherein the impeller includes a high-permeability magnetic material portion and at least one magnet.
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16. The bicycle exercise resistance device of claim 15, wherein the high-permeability magnetic material portion comprises a plate that is attached to the impeller and faces the rotating member, and wherein the magnet is joined to the plate between the plate and the impeller.
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17. The bicycle exercise resistance device of claim 15, wherein the rotating member includes a second high-permeability magnetic material portion and at least one magnet.
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18. The bicycle exercise resistance device of claim 17, wherein the second high-permeability magnetic material portion comprises a plate that is attached to the rotating member and faces the impeller, and wherein the magnet is joined to the plate between the plate and the rotating member.
Specification