Magnetic detent for rotatable knob
AssigneeTerumo Cardiovascular Systems Corporation
InventorMichael K. Domroese
Life of this patent
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Abstract
A roller pump including a stator and a rotor assembly disposed within the stator. The rotor assembly includes a rotor hub, a first roller slide and a second roller slide slidingly disposed within the rotor hub. Each of the roller slides rotatably supports a roller. An occlusion adjustment knob for adjusting a radial position of the first and second roller slides and a magnetic detent assembly for providing an audible indicator as the occlusion adjustment knob is rotated.
Claims10
A knob assembly comprising:
- a rotatable knob having an under surface and a top surface;
- a notched plate rotatable with said rotatable knob and arranged proximate to said under surface of said rotatable knob;
- a magnetic detent assembly disposed substantially stationary proximate to said notched plate, wherein said magnet detent assembly includes a base member having at least one sealed enclosure, said at least one enclosure including a magnetically attractable member and a magnet;
- wherein rotation of said rotatable knob and said notched plate over said magnetic detent assembly provides a user with an audible indicator of rotation.
A magnetic detent assembly for generating audible feedback during relative movement past a magnetizable structure, comprising:
- a base member having a top surface and a bottom surface;
- at least one magnetically attractable member disposed in a recess in said base member, said recess being elongated between a pair of opposite sides formed within said base member;
- and
- at least one magnet disposed in said base member between said recess and said botton surface;
- wherein said at least one magnetically attractable member is movably contained in said recess between said top surface of said base member and said at least one magnet, and wherein said at least one magnetically attractable member strikes at least one of said opposite sides during movement of said magnetizable structure past said top surface to generate said audible feedback.
Dependencies are inferred from the claim text.