System For Providing Cyclic Motion
AssigneeBloemer, Meiser & Westerkamp, LLC
InventorsEdward Westerkamp, Daniel Meiser
Life of this patent
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Abstract
In one embodiment, a system for providing cyclic motion includes a magnetic drive having an electrically conductive coil defining a bore and a magnetic member movable through the bore. A control provides current to the coil and selectively reverses the direction of the current to move the magnetic member through the bore. In another embodiment, the system includes a counterbalance. The counterbalance includes a biasing member for reacting against a load applied to a support, and a lever arm coupled to the biasing member for varying a preload of the biasing member. In another embodiment, the magnetic drive and the counterbalance may be incorporated into an apparatus for reciprocating a person.
Claims9
A magnetic drive, comprising:
- an electrically conductive coil defining a bore and having first and second oppositely disposed ends;
- a magnetic member movable from a first position outside said bore and adjacent said first end of said coil, through said bore, to a second position outside said bore and adjacent said second end of said coil;
- and
- a control operable to selectively provide current to said electrically conductive coil and to reverse a direction of the current provided to said electrically conductive coil.
A counterbalance, comprising:
- a biasing member adapted to be coupled to a load support for reacting against a load applied to the load support;
- and
- a lever arm operatively coupled to said biasing member and selectively positionable relative to said biasing member to vary a preload of said biasing member.
Dependencies are inferred from the claim text.