Bed arrangement
First Claim
1. A height adjustable bed comprisinga base,a vertically adjustable support frame vertically adjustable relative to said base,pivoted lifting arms pivotally connecting between said base and said vertically adjustable support frame,force application means for applying a lifting-movement-effecting torque to said pivoted lifting arms,said force application means having a power input zone,said force application means for applying a lifting-movement-effecting torque including intermediate torque compensation means in powertransmitting relation between said power input zone and said lifting arms for automatically applying a greater torque to said lifting arms in a lowered position than in a raised position of said lifting arms, for a given input power or torque applied at said power input zone.
2 Assignments
0 Petitions
Accused Products
Abstract
A bed having a torque-compensated parallelogram lifting arm arrangement. The bed has a subframe vertically adjustable by the parallelogram lifting arm arrangement and thereby retains a level relationship at all height adjustment levels.
An articulated mattress support surface is provided, which is formed by articulated pivotally interconnected head or back, seat, thigh and leg sections mounted on the level vertically adjustable subframe. The seat section is double-pivoted, and enables simple and effective Trendelenburg and Reverse Trendelenburg positioning independent of any position of the height-adjustable supporting subframe. The seat, thigh, and head sections are articulated by cam and cam follower drive arrangements. Selective pivot defeat means are provided to enable selective pivotal lowering of the thigh and head or back sections without pivoting the seat section, and independent of the supporting subframe position, enabling simple and effective hyperextension positioning. The back and thigh sections may be pivoted up and down to at and above horizontal by patient control; other movements and positioning are nurse-controlled by a foot end mounted nurse control panel. A cantilever bumper, having wall engaging rollers, is pivotally mounted at the head end of the bed on the base, and is automatically lowered when the bed height is lowered to assure spaced positioning of the bed from a wall. The bumper self-retains its set angular position by frictional action at its pivot mounting connection with the base. Sockets are provided on the vertically adjustable always level subframe at the corners and midsection for mounting IV rods, fracture frames, patient control pendant holders, etc. Vertical height adjustment and all mattress support surface articulation action can be selectively effected by electric motor control or hand crank.
57 Citations
37 Claims
-
1. A height adjustable bed comprising
a base, a vertically adjustable support frame vertically adjustable relative to said base, pivoted lifting arms pivotally connecting between said base and said vertically adjustable support frame, force application means for applying a lifting-movement-effecting torque to said pivoted lifting arms, said force application means having a power input zone, said force application means for applying a lifting-movement-effecting torque including intermediate torque compensation means in powertransmitting relation between said power input zone and said lifting arms for automatically applying a greater torque to said lifting arms in a lowered position than in a raised position of said lifting arms, for a given input power or torque applied at said power input zone.
-
4. A height adjustable bed comprising
a base, a vertically adjustable support frame vertically adjustable relative to said base, pivoted lifting arms pivotally connecting between said base and said vertically adjustable support frame, force application means for applying a lifting-movement-effecting torque to said pivoted lifting arms, said means for applying a lifting-movement-effecting torque including torque compensation means for applying a greater torque to said lifting arms in a lowered position than in a raised position of said lifting arms, said torque compensation means comprising a pivotally mounted bell crank, and connecting means for connecting said bell crank in variable torque transmitting relation between a power input means and said lifting arms, said connecting means including a force-transmitting connection between one end of said bell crank and one of said lifting arms, and a second force-transmitting connection between another end of said bell crank and said power input means, said connecting means further comprising a drag link, said bell crank being pivotally mounted on and carried by said drag link, and means pivotally connecting said drag link at spaced positions at each of said lifting arms.
-
9. A height-adjustable bed comprising
a base, a vertically adjustable support frame vertically adjustable relative to said base, pivoted lifting arms pivotally connecting between said base and said vertically adjustable support frame, force application means for applying a lifting-movement-effecting torque to said pivoted lifting arms, said means for applying a lifting-movement-effecting torque including torque compensation means for applying a greater torque to said lifting arms in a lowered position than in a raised position of said lifting arms, said lifting arms comprising a first pair of fixedly interconnected parallel arms laterally spaced apart and pivotally mounted on a common axis, and a second pair of fixedly interconnected arms laterally spaced apart and pivotally mounted on a common axis spaced from said first-mentioned common axis, said second pair of arms being inclined toward one another to form a triangle or truncated triangle laterally strong brace arm arrangement, and said second pair of arms forming two pivotal connections adjacent laterally differently spaced apart zones of said arms.
-
10. A height-adjustable bed comprising
a base, a vertically adjustable support frame vertically adjustable relative to said base, pivoted lifting arms pivotally connecting between said base and said vertically adjustable support frame, force application means for applying a lifting-movement-effecting torque to said pivoted lifting arms, said means for applying a lifting-movement-effecting torque including torque compensation means for applying a greater torque to said lifting arms in a lowered position than in a raised position of said lifting arms, said lifting arms connecting with said vertically adjustable support frame and said base in a pivoted parallelogram arrangement.
-
12. A height-adjustable bed comprising
a base, a vertically adjustable support frame vertically adjustable relative to said base, pivoted lifting arms pivotally connecting between said base and said vertically adjustable support frame, force application means for applying a lifting-movement-effecting torque to said pivoted lifting arms, said means for applying a lifting-movement-effecting torque including torque compensation means for applying a greater torque to said lifting arms in a lowered position than in a raised position of said lifting arms, said lifting arms forming a parallelogram linkage, and a cantilever wall bumper pivotally mounted on said base and movable between a raised longitudinally retracted position and a lowered longitudinally extended position, said wall bumper movable downwardly and longitudinally outwardly as a function of lowering of said vertically adjustable support frame and the pivotal angular lowering movement of said vertically adjustable support frame in the same general longitudinally outward direction as said bumper.
-
18. A height-adjustable bed comprising
a base, a vertically adjustable support frame vertically adjustable relative to said base, pivoted lifting arms pivotally connecting between said base and said vertically adjustable support frame, force application means for applying a lifting-movement-effecting torque to said pivoted lifting arms, said means for applying a lifting-movement-effecting torque including torque compensation means for applying a greater torque to said lifting arms in a lowered position than in a raised position of said lifting arms, said force application means comprising an elevation drive screw and nut.
-
26. A height-adjustable bed comprising
a base, a vertically adjustable support frame vertically adjustable relative to said base, pivoted lifting arms pivotally connecting between said base and said vertically adjustable support frame, force application means for applying a lifting-movement-effecting torque to said pivoted lifting arms, said means for applying a lifting-movement-effecting torque including torque compensation means for applying a greater torgue to said lifting arms in a lowered position than in a raised position of said lifting arms, said lifting arms connecting with said vertically adjustable support frame and said base in a pivoted parallelogram arrangement, and articulated mattress support means on said vertically adjustable support frame, said vertically adjustable support frame being a subframe for said articulated mattress support means.
-
31. A height adjustable bed comprising
a base, a vertically adjustable support frame vertically adjustable parallel to said base, pivoted lifting arms pivotally connecting between said base and said vertically adjustable support frame, force application means for applying a pivotal lifting movement effecting force to said pivoted lifting arms, said lifting arms forming a parallelogram linkage, and a wall bumper pivotally mounted on said base and movable between a raised longitudinally retracted position and a lowered longitudinally extended position, said wall bumper movable downwardly and longitudinally outwardly as a function of lowering of said vertically adjustable support frame and the movement of said vertically adjustable support frame in the same general longitudinally outward direction as said bumper.
-
35. A height adjustable bed comprising
a base, a vertically adjustable support frame vertically adjustable relative to said base, pivoted lifting arms pivotally connecting between said base and said vertically adjustable support frame, force application means for applying a lifting-movement-effecting torque to said pivot lifting arms, said lifting arms comprising a first pair of fixedly interconnected arms laterally spaced apart and pivotally mounted on a common axis, and a second pair of fixedly interconnected arms laterally spaced apart and pivotally mounted on a common axis spaced from said first-mentioned common axis, said second pair of arms being inclined toward one another to form a triangle or truncated triangle laterally strong brace arm arrangement, and said second pair of arms forming two pivotal connections adjacent laterally differently spaced apart zones of said arms.
Specification