Patent ID: 11857830
Assignee: KYNETT HOLDING B.V.
Field: Furniture, games (Other fields)
Classification: CPC A | IPC A

Claim 11:
12. A physical training apparatus comprising:
a housing;
a flywheel mechanism accommodated in the housing, said flywheel mechanism including a spindle, at least one flywheel mounted on the spindle and bearings to support the spindle in the housing;
a windable pull element which is arranged to be wound up the spindle and unwound from the spindle;
a handgrip attached to the pull element;
wherein the spindle includes a spindle end portion, wherein the flywheel is exchangeably mounted on the spindle end portion against a stop located on the spindle, and wherein a fastening knob is releasably coupled to the spindle end portion and adapted to engage the flywheel and force the flywheel against the stop located on the spindle;
wherein a first set of one or more radial projections are formed on the spindle end portion, wherein the central aperture of the flywheel has one or more recesses in its outer contour corresponding with the pattern of the one or more radial projections of the first set such that the flywheel can be moved beyond the one or more radial projections, and wherein the engagement opening of the fastening knob is defined by a radially inwardly extending flange having one or more recesses such that the recesses of the flange can be aligned with the radial projections and when the spindle end portion is inserted in the engagement opening and when the projections are moved beyond the flange, the recesses of the flange can be misaligned with the radial projections of the first set by rotation of the knob relative to the spindle end portion so as to form a bayonet catch wherein the spring element forces the projection(s) of the first set of one or more radial projections into engagement with the flange.