Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
257 words
In a chair having a frame, a seat and a backrest, frame mounting means adapted to be fixed to the frame of the chair, manual handle means, means to mount said manual handle means for pivotal movement on said frame mounting means, a primary actuator link, means to mount said primary actuator link for pivotal movement relative to said manual handle means on an axis parallel to and spaced from the pivotal axis of said manual handle means on said frame mounting means, a sequence drive link pivoted to said primary actuator link, means to pivotally connect said sequence drive link to said frame mounting means, a sequence control link pivotally connected to the pivotal connection of said primary actuator link to said sequence drive link, a seat link adapted to be attached to the seat of said chair, a rear bell crank pivoted to said frame mounting means, a rear carrier link pivoted to said seat link, means to pivotally connect said rear bell crank to said rear carrier link below the pivotal connection of said rear carrier link to said seat link, said rear carrier link having an arm extending downwardly below the pivotal connection of said rear bell crank to said rear carrier link, said arm being formed with a longitudinal slot, slider means on said sequence control link slidable in said slot, a backrest mounting link adapted to be attached to the backrest of said chair, and means controlled by said sequence drive link to move said backrest mounting link up and down.
Claim 2
Dependent Claim
257 words
In a chair having a frame, a seat and a backrest, frame mounting means adapted to be fixed to the frame of the chair, manual handle means, means to mount said manual handle means for pivotal movement on said frame mounting means, a primary actuator link, means to mount said primary actuator link for pivotal movement relative to said manual handle means on an axis parallel to and spaced from the pivotal axis of said manual handle means on said frame mounting means, a sequence drive link pivoted to said primary actuator link, means to pivotally connect said sequence drive link to said frame mounting means, a sequence control link pivotally connected to the pivotal connection of said primary actuator link to said sequence drive link, a seat link adapted to be attached to the seat of said chair, a rear bell crank pivoted to said frame mounting means, a rear carrier link pivoted to said seat link, means to pivotally connect said rear bell crank to said rear carrier link below the pivotal connection of said rear carrier link to said seat link, said rear carrier link having an arm extending downwardly below the pivotal connection of said rear bell crank to said rear carrier link, said arm being formed with a longitudinal slot, slider means on said sequence control link slidable in said slot, a backrest mounting link adapted to be attached to the backrest of said chair, and means controlled by said sequence drive link to move said backrest mounting link up and down.
Claim 3
Dependent Claim
75 words
The combination of claim 1, the distance from the pivotal connection of said sequence drive link and said sequence control link with said primary actuator link, to the pivotal connection of said sequence drive link with said frame mounting means, being equal to the distance from the location of said slider meaNs on said sequence control link to said pivotal connection of said sequence drive link and sequence control link with said primary actuator link.
Claim 4
Dependent Claim
77 words
The combination of claim 2, the distance from the pivotal connection of said sequence drive link with said primary actuator link, to the pivotal connection of said sequence drive link to said frame mounting means being equal to the distance from the pivotal connection of said rear carrier link with said rear bell crank to the slider means, when the slider means is at the bottom of the slot in said arm of said rear carrier link.
Claim 5
Dependent Claim
75 words
The combination of claim 1, a pin fixed to said manual handle means, and positioned to engage said primary actuator link when the pivotal connection of said manual handle means to said frame mounting means is past a center line through the pivotal connections of said primary actuator link to said manual handle means and to said sequence drive link, upon moving said manual handle means in a direction to lower said backrest mounting link.
Claim 6
Dependent Claim
68 words
The combination of claim 1, a front bell crank pivoted to said frame mounting means, a link connecting said rear and front bell cranks, a front carrier link pivoted to said frame mounting means and to said seat link, legrest linkage pivotally connected to said seat link and to said front carrier link, and means controlled by said front bell crank to project and retract said legrest linkage.
Claim 7
Dependent Claim
80 words
The combination of claim 6, said means controlled by said primary actuator link comprising a sequence drive link, and means to stop rotation of said manual handle means back to the lowered position of said backrest mounting means, after the pivotal connection of said manual handle means to said frame mounting plate is past a center line through the pivotal connections of said primary actuator link to said arm of said manual handle means and to said sequence drive link.
Claim 8
Dependent Claim
27 words
The combination of claim 7, legrest linkage connected to said seat link, and means controlled by said rear bell crank to project and retract said legrest linkage.
Claim 9
Dependent Claim
72 words
The combination of claim 8, said means to lock said rear carrier link comprisingg a sequence control link pivoted to the pivotal connection of said primary actuator link to said sequence drive link, said seat carrier link having a downwardly extending arm formed with a longitudinal slot and a pin on said sequence control link disposed at the lower end of said slot when said backrest mounting link is in lowered position.
Claim 10
Dependent Claim
71 words
The combination of claim 9, said pivotAl connection of said primary actuator link to said sequence drive link and sequence control link being movable to coaxial position with respect to the pivotal connection of said rear carrier link to said rear bell crank upon rotating said manual handle means from its position in which the backrest mounting link is lowered to its position in which the backrest mounting link is raised.
Claim 11
Dependent Claim
51 words
The combination of claim 10, said means controlled by said primary actuator link further comprising a secondary actuator link pivoted to said sequence drive link, a primary bell crank pivoted to said frame mounting plate, and means controlled by said primary bell crank to control movement of said backrest mounting link.