Beds – Hammocks
Reexamination Certificate
2007-06-26
2007-06-26
Santos, Robert G. (Department: 3673)
Beds
Hammocks
C005S109000
Reexamination Certificate
active
11453316
ABSTRACT:
A rocking machine automatically imparts a continuous, rocking motion to an occupant recumbent on a hammock. One end of the rocking machine is attached to a fixed location. The other end of the rocking machine is attached to a conventional hammock, which is attached to a second fixed location. The rocking machine has a container that houses a periodically reversing geared motor. Operation of the motor is controlled by an electrical circuit having a shaft attached to one end of a torsional spring. The other end of the torsional spring is connected to the hammock. A pressure sensitive switch becomes actuated and moves to a closed position, enabling supply of power to the geared motor that initiates a continuous rocking motion, when the hammock becomes occupied. The electrical circuit provides periodically reversing oscillations while monitoring current to the motor, and decreases the period between oscillations until it matches the natural period of oscillation of the spring-occupant weight system. Motor current is thereby maintained at a decreased value, increasing the efficiency of energy transfer from the motor to rocking motion for said hammock.
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Buff Ernest D.
Ernest D. Buff & Associates
Narasimhan Dave
Santos Robert G.
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