Patent ID: 8484781
Filing Date: 2013-07-16
Classification: A47C,A61G

Abstract:
1. An adjustable bed comprising: a. an underframe crosstie; b. a pair of bed board support rollers supported by the underframe crosstie, wherein the underframe crosstie forms a track supporting the pair of bed board support rollers; c. a bed board support formed as a frame, wherein the bed board support is supported by the pair of bed board support rollers; d. a fixed base plate secured to the bed board support; e. a back board; attached in a hinged connection to the fixed base plate; f. a first back board support, wherein the first back board support has a first revolution axis mounted on an upper end of the first back board support, wherein a back board roller is mounted on the first revolution axis, wherein the back board roller rolls on a lower surface of the back board when raising the back board, wherein the first back board support has a back board support lower end pivotally connected to the under frame crosstie, wherein the first back board support has rigid permanent connection to a front part bridge piece such that the angle between the first back board support and the front part bridge piece does not change, wherein the front part bridge piece acts as a lever to raise the backboard by raising the first back board support having the back board roller, wherein the front part bridge piece is shorter than the first back board support; g. a second back board support that supports the back board; wherein the second back board support is pivotally connected to the underframe crosstie, and wherein the second back board support is pivotally connected to the back board; h. a first electrical motor assembly which has a first electrical motor assembly extending arm for increasing length; wherein the front part bridge piece is pivotally connected to the first electrical motor assembly extending arm; i. a thigh board attached in a hinged connection to the fixed base plate; j. a thigh board support mounted under the thigh board; wherein the thigh board support has a thigh board roller mounted on an upper end of the thigh board support, wherein the thigh board roller rolls on a lower surface of the thigh board when raising the thigh board, wherein the thigh board support is pivotally mounted to the underframe crosstie, wherein the thigh board support is rigidly connected to an electrical machinery bridge piece that acts as a lever for raising the thigh board; k. a second electrical motor assembly which has a second electrical motor assembly extending arm for increasing length; wherein the electrical machinery bridge piece is pivotally connected to the second electrical motor assembly extending arm to lift the thigh board when the second electrical motor assembly is controlled by a controller to increase in length; and l. a calf board attached in a hinged connection to the thigh board.