Mattress corner lifting device

摘要

A mattress corner lifter that includes a base and a lifting mechanism supported by the base. Also, a platform is rotatably supported at the top of the lifting mechanism. The lifting has a compressed state, an extended state and an intermediate state between the compressed and extended states. In the compressed state the mattress lifter pushes up with a force of less than 25 lbs, but in its intermediate state the force with which the mattress lifter presses up increases as the mattress lifter extends, until it reaches a maximum of at least 40 lbs, and wherein at the extended state the mattress lifter resists compression with a force of at least 40 lbs.

主权项

1. A bed, comprising:
a) a base, having a rectangular top surface, defining end portions each including two interior corners of said base; b) a mattress having two mattress end portions, each including two mattress corners, supported by said rectangular top surface; c) a mattress end portion lifter, having a variable height and being supported by said base at an end portion, beneath a first mattress end portion, said lifter having:
i) a compressed state, in which said variable height of said lifter is at a first height and in which, as an unavoidable consequence of being in said compressed state, said lifter exerts an upward force that is less than the weight of said mattress pushing down on said lifter;ii) an intermediate, partially-extended state, in which said variable height of said lifter is between a second height that is taller than said first height and a third height that is greater than said second height and in which, as an unavoidable consequence of being in said intermediate state, said lifter exerts an upward force that is greater than the weight of said mattress pushing down on said lifter;iii) an extended state, in which said variable height of said lifter is at said third height and in which, as an unavoidable consequence of being in said extended state, said lifter resists compression by a force great enough to resist being compressed by the downward force of the weight of said mattress; and d) whereby a user may release said lifter from its compressed state by lifting up on said first mattress end portion, thereby causing said lifter to push through its intermediate state into its extended state, and may place said lifter, from its extended state into its compressed state by pushing down on said first mattress portion, until said lifter is compressed into its compressed state.