Back to results
US 4,754,532 AGranted
Adjustable quick release magnetic holding assembly
OwnerRichard E. Thomson, Peter G. Berranginventors
Life of this patent
Estimating the term…
Abstract
A variable strength magnetic holding assembly as disclosed. It includes an attachment plate with a section made of magnetic material and a holding and support assembly adapted to magnetically hold the attachment plate thereon. An adjustment knob is used to vary the magnetic coupling between the attachment plate and the holding and support assembly.
Claims18
A variable strength magnetic holding assembly, comprising:
- an attachment plate with a section thereof made of magnetic material;
- a holding and support assembly adapted to magnetically hold said attachment plate thereon, said assembly having an element made of magnetic material separated by a non-magnetic spacer from a permanent magnet positioned near said element, said magnet being magnetically coupled with said element and said attachment plate section, wherein said section, element, non-magnetic spacer and permanent magnet form a magnetic circuit;
- means for adjusting the magnetic coupling between said permanent magnet, element and said section of said attachment plate made of magnetic material, by varying the separation between the permanent magnet and at least one of said magnetically coupled materials in the direction of the magnetic flux, such that the magnetic holding force between said attachment plate and said magnetic holding and support assembly can be adjusted.
A magnetic holding assembly for use with a windsurfer harness having a hook adapted to be secured to a spreader bar, comprising:
- an attachment plate with a section thereof made of magnetic material and wherein said hook is secured thereto;
- a magnetic holding and support assembly forming part of said spreader bar and adapted to magnetically hold said attachment plate thereon, said magnetic holding and support assembly being comprised of an element made of magnetic material and a permanent magnet positioned near said element, magentically coupled to said element and said attachment plate section wherein said section, element and permanent magnet form a magnetic circuit;
- and means for adjusting the magnetic coupling between said permanent magnet, element and said section of said attachment plate made of magnetic material, by varying the separation between the permanent magent and at least one of said magnetically coupled materials in the direction of the magnetic flux, such that the magentic holding force between said attachment plate and said assembly can be adjusted.
Dependencies are inferred from the claim text.