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US 4,314,623 AGranted
Vibration isolator
AssigneeKokka Kogyo Kabushiki Kaisha
InventorMasahito Kurokawa
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AssigneeKokka Kogyo Kabushiki Kaisha
InventorMasahito Kurokawa
Estimating the term…
A vibration isolator utilizes a force of magnetic repulsion which is produced by a pair of permanent magnets disposed so that poles of a like polarity oppose to each other. The vibration isolator includes an upper and a lower, annular magnet assembly which are axially magnetized and which are disposed coaxially on a common axis so that their opposing surfaces present poles of a like polarity. The respective magnet assemblies are covered, except for the opposing surfaces, by yoke members of a magnetizable material, whereby a magnetic flux is concentrated across the opposing surfaces of the magnetic assemblies to produce an increased force of magnetic repulsion therebetween. Bearing sleeves are disposed in the central region of each of the magnet assemblies. A connecting shaft has its opposite ends loosely fitted in the respective bearing sleeves, whereby one of the magnet assemblies is coupled to the other so as to be axially movable independently from each other.
A vibration isolator comprising an upper and a lower magnet assembly each magnetized in the vertical direction and formed with a central opening which extends vertically therethrough, the magnet assemblies being disposed coaxially on a common axis of the central opening so that their opposing surfaces present poles of a like polarity, a pair of yoke members of a magnetizable material disposed on the respective magnet assemblies so as to surround the side and the opposite surface from said opposing surfaces of the individual magnet assemblies, a pair of bearing members disposed in the central openings of the magnet assemblies and each formed with a through-opening in alignment with said axis, and a connecting shaft of magnetizable material loosely extending through the through-openings of the pair of bearing members and coupling one of the magnet assemblies to the other so as to be axially movable independently from each other.
Dependencies are inferred from the claim text.