Multi adjustable chair
First Claim
1. An adjustable chair comprising a support frame, an adjustable seat assembly secured to said support frame, an adjustable backrest assembly secured to a back support frame, said adjustable backrest assembly having displaceable back support elements, backrest adjustment means to adjustably secure said back support elements to a desired position to adjust the vertical length of said backrest, said backrest having a back cushion secured thereto, said back cushion being secured to a cushion extension and retraction mechanism to retract or extend a portion of said cushion in synchronism with said back support elements as said back support elements are displaced along said back support frame to retract or extend said backrest assembly lengthwise, said adjustable seat assembly having a pair of laterally displaceable seat panels each secured to a common laterally displacing mechanism operable to a displace said panels to or away from one another in unison to provide equal lateral adjustment of said adjustable seat on opposed sides of a central plane aligned with said backrest, said adjustable seat assembly also having a displaceable front guide frame provided with a seat depth adjustable mechanism to extend and retract said front guide frame, and a seat cushion having opposed lateral sections extendable or retractable with the displacement of said seat panels and a frontal section extendable or retractable in unison with the displacement of said front guide frame.
1 Assignment
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Accused Products
Abstract
A multi adjustable chair is comprised of a support frame to which is secured an adjustable seat assembly and an adjustable backrest assembly. The backrest assembly has displaceable back support plates that are adjustable to a desired position. A back cushion is secured over the back support elements and is displaceable in unison therewith as said backrest is extended or retracted. The seat assembly has a pair of laterally displaceable seat panels as well as a front guide frame and the seat cushion is also extendable both laterally and forwardly as the seat panels and front guide frame are displaced to adjust the size of the seat assembly. The adjustable chair is preferably, but not exclusively, a wheelchair and it is provided with an adjustable support base assembly and a chair tilting mechanism.
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Citations
53 Claims
- 1. An adjustable chair comprising a support frame, an adjustable seat assembly secured to said support frame, an adjustable backrest assembly secured to a back support frame, said adjustable backrest assembly having displaceable back support elements, backrest adjustment means to adjustably secure said back support elements to a desired position to adjust the vertical length of said backrest, said backrest having a back cushion secured thereto, said back cushion being secured to a cushion extension and retraction mechanism to retract or extend a portion of said cushion in synchronism with said back support elements as said back support elements are displaced along said back support frame to retract or extend said backrest assembly lengthwise, said adjustable seat assembly having a pair of laterally displaceable seat panels each secured to a common laterally displacing mechanism operable to a displace said panels to or away from one another in unison to provide equal lateral adjustment of said adjustable seat on opposed sides of a central plane aligned with said backrest, said adjustable seat assembly also having a displaceable front guide frame provided with a seat depth adjustable mechanism to extend and retract said front guide frame, and a seat cushion having opposed lateral sections extendable or retractable with the displacement of said seat panels and a frontal section extendable or retractable in unison with the displacement of said front guide frame.
- 37. An adjustable chair seat comprising a seat support frame, a pair of laterally displaceable seat panels each secured to a common laterally displacing mechanism operable to displace said panels to or away from one another in unison to provide equal lateral adjustment of said adjustable seat on opposed sides of a central plane aligned with said backrest, said adjustable seat assembly also having a displaceable front guide frame provided with a seat depth adjustable mechanism to extend and retract said front guide frame and a seat cushion having opposed lateral sections extendable or retractable with the displacement of said seat panels and a frontal section extendable or retractable in unison with the displacement of said front guide frame.
- 46. An adjustable support base assembly for a wheelchair, said assembly comprising a multi-position wheel mounting plate secured to a support frame for securing axels of opposed wheels to said frame at a desired position, each mounting plate being secured to the support frame and has a front caster support slidingly secured to a connecting ramp of said mounting plate to provide a position adjustment for front casters of said front caster support relative to said seat assembly whereby to permit a user person to touch a floor support surface with its feet.
Specification