Method of controlling the coordinative lifting of bottom...

Details Method of controlling the coordinative lifting of bottom... Method of controlling the coordinative lifting of bottom...

2005-03-22

2005-03-22

Masih, Karen (Department: 2837)

Electricity: motive power systems

Automatic and/or with time-delay means

Motor load, armature or primary or secondary circuit current

C318S746000, C318S744000

Reexamination Certificate

active

06870341

ABSTRACT:
A method of controlling the coordinative lifting of bottom sections of lying furniture such as a bed that has a back bottom section for lifting the back portion of a lying person and a knee bottom section for lifting his/her knee portion, in which the respective bottom sections can be lifted by the lifting mechanisms respectively provided for them, characterized in that the back bottom section is provided with an external force detecting means for detecting the external force in the sliding direction acting on the back of the lying person when the back bottom section is lifted while the knee bottom section is kept lifted, that when the back bottom section is pivotally rotated and lifted to be kept inclined from a flat state where all the bottom sections are kept down to lie flat, the knee bottom section is also adequately lifted, and that when the external force in the sliding direction acting on the back of the lying person, detected by said external force detecting means, has risen to a preset value, the knee bottom section is controlled to descend.

REFERENCES:
patent: 4799276 (1989-01-01), Kadish
patent: 5469591 (1995-11-01), Nomura
patent: 6287253 (2001-09-01), Ortega et al.

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