Robust low profile shaker
OwnerRandolph J. Crowson, IIinventor
Life of this patent
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Abstract
An electrodynamic shaker apparatus is disclosed for providing shaking and/or vibrational motion. The shaker includes armature and stator assemblies as well as a distributed spring assembly. The shaker apparatus of the present invention is robust, supports increased off-center loads, and has a low profile such that it may be easily placed under an item of furniture in order to impart vibrational motion in response to electrical signals from a variety of sources.
Claims20
A moveable assembly for imparting motion to an object of furniture in response to electrical signals from audio/video equipment, comprising:
- a bottom portion;
- a moveable top portion opposing the bottom portion;
- an electromagnetic assembly, a portion of the electromagnetic assembly being integrated with the top portion and another portion of the electromagnetic assembly being integrated with the bottom portion in order to produce motion corresponding to a combination of frequencies in at least the top portion in synchronization with the electrical signals from the audio/video equipment;
- and
- a spring assembly capable of supporting the load from the object of furniture by providing resilient support between the bottom portion and the top portion, wherein the spring assembly comprises at least three discrete springs located at the periphery of the electromagnetic assembly such that at least part of each spring is co-planar with at least part of the electromagnetic assembly, and wherein the height of the spring assembly is substantially equal to the maximum distance between the bottom portion and the top portion.
A moveable assembly for imparting variable motion to an object of furniture, comprising:
- a bottom portion;
- a moveable top portion opposing the bottom portion;
- an electromagnetic assembly, a portion of the electromagnetic assembly being integrated with the top portion and another portion of the electromagnetic assembly being integrated with the bottom portion in order to produce variable motion in at least the top portion;
- a spring assembly capable of supporting the load from the object of furniture by providing resilient support between the bottom portion and the top portion, wherein the spring assembly comprises a uniformity of springlike material within the moveable assembly that compresses to support the weight of the object and functions to align the top portion with the bottom portion during said compression.
A moveable assembly shaped and suited for use between a fixed surface and moveable object, comprising:
- a bottom portion, the bottom portion comprising a rigid surface for contacting the fixed surface;
- a top portion opposing the bottom portion, the top portion comprising a substantially planar rigid surface for receiving at least a portion of the moveable object;
- a spring assembly for providing resilient support between the bottom portion and the top portion, the spring assembly comprising a plurality of discrete spring elements for supporting the top portion;
- and
- an electromagnetic assembly, the electromagnetic assembly comprising a plurality of opposing coil-magnet pairs being operatively integrated with the top portion and with the bottom portion in order to produce variable motion substantially along a single axis in at least the top portion.
Dependencies are inferred from the claim text.