초록 ▼

An improved lumbosacral backrest having a back engaging contour which is adjustable under power or manual operation to accommodate users\backs which vary widely in configuration and dimension. It has a contour defined by a segmented regulator spindle inserted between a foundation frame and resilient

An improved lumbosacral backrest having a back engaging contour which is adjustable under power or manual operation to accommodate users\backs which vary widely in configuration and dimension. It has a contour defined by a segmented regulator spindle inserted between a foundation frame and resilient back support, the regulator spindle being adjustable along the back support and adapted to define a transverse plane of rigidity at the proper level and shape to provide comfortable support for the individual user\s back. The backrest includes appropriate power means for actuating the regulator spindle to effect massaging action on the lumbosacral region of the back. It further includes manual means for adjusting the regulator spindle and which is operable when the power means for effecting massaging action has been deenergized.

대표청구항 ▼

A lumbosacral backrest for use with chairs, beds, vehicle seats, and wheelchairs, comprising in combination: (a) an upstanding foundation frame; (b) a flexible back support fastened to said foundation frame in outwardly bowed relation therewith; (c) a regulator spindle disposed transversely of said

A lumbosacral backrest for use with chairs, beds, vehicle seats, and wheelchairs, comprising in combination: (a) an upstanding foundation frame; (b) a flexible back support fastened to said foundation frame in outwardly bowed relation therewith; (c) a regulator spindle disposed transversely of said foundation frame and said flexible back support and interposed therebetween to define a transverse plane of rigidity across said back support; (d) guide means adjacent the ends of said regulator spindle journaling same for rotational movement in a first direction longitudinally of said back support; and (e) means interposed between said guide means adapted to rotate relative to said back support in a direction opposite to said first direction.