Chair with latch mechanism

Claim 2

In a chair, a stationary base frame, a second frame mounted on the base frame for longitudinal fore and aft movement between a forwardmost position and a rearmost position, a chair body having sides and carried by said second frame to move longitudinally with it, a forward toothed latch bracket, a rear toothed latch bracket, said brackets being mounted on said base frame and located to determine respectively said forwardmost and rearmost positions, a movable pawl pivotally mounted on the second of said frames on a horizontal axis and yieldably biased by gravity to operatively engage the teeth in said brackets, and manual means for moving the pawl to disengage it from said brackets, said manual means including a mechanical actuator switch mounted on said body adjacent the top of one of said sides and operable to actuate the pawl.

Claim 3

A chair as set forth in claim 1 including a support bracket and having a wire operatively connected to said pawl to move it and spring means between the support bracket and pawl to yieldably urge and bias the pawl into latching position to operatively engage the teeth in said brackets.

Claim 4

In a chair, a stationary base frame, a second frame mounted on the base frame for longitudinal fore and aft movement between a forwardmost position and a rearmost position, a forward toothed latch bracket, a rear toothed latch bracket, said brackets being mounted on one of said frames and located to determine respectively said forwardmost and rearmost positions, a movable pawl mounted on the other of said frames and yieldably biased to operatively engage the teeth in said brackets, manual means for moving the pawl to disengage it from said brackets, a chair body having sides and carried by said second frame, said manual means including a mechanical actuator switch mounted on said body adjacent the top of one of said sides and operable to actuate the pawl, said brackets being mounted on said base frame and said pawl being pivotally mounted on said second frame, a support bracket mounted on said second frame and located above said pawl, said manual means including a Bowden wire assembly based on said support bracket and having a wire operatively connected to said pawl to move it, spring means between the bracket and pawl to yieldably urge the pawl into latching position, said chair body carried on said second frame moving longitudinally with it and having arm rest portions, and a mechanical switch mounted on said chair body adjacent an arm rest and operatively connected to said Bowden wire assembly to activate it to move said pawl.

Claim 5

In a chair, a stationary base frame, a second frame mounted on the base frame for longitudinal fore and aft movement between a forwardmost position and a rearmost position, a forward toothed latch bracket, a rear toothed latch bracket, said brackets being mounted on one of said frames and located to determine respectively said forwardmost and rearmost positions, a movable pawl mounted on the other of said frames and yieldably biased to operatively engage the teeth in said brackets, manual means for moving the pawl to disengage it from said brackets, a chair body having sides and carried by said second frame, said manual means including a mechanical actuator switch mounted on said body adjacent the top of one of said sides and operable to actuate the pawl, said brackets being mounted on said base frame and said pawl being pivotally mounted on said second frame, a support bracket mounted on said second frame and located above said pawl, said manual means including a Bowden wire assembly based on said support bracket and having a wire operatively connected to said pawl to move it, spring means between the bracket and pawl to yieldably urge the pawl into latching position, said chair body carried on said second frame moving longitudinally with it and having arm rest portions, and a mechanical switch mounted on said chair body adjacent an arm rest and operatively connected to said Bowden wire assembly to activate it to move said pawl.

Claim 6

A chair as set forth in claim 3 wherein said second frame includes a cross piece at the rear thereof, said support bracket being secured at its rear end to the top of said cross piece, a pawl pivot bracket secured at its rear to the bottom of said cross piece, said pawl being pivoted at its rear to said pawl pivot bracket.

Claim 7

A chair as set forth in claim 4 wherein said ratchet brackets and said pawl are located substantially on a midline of the chair.

Claim 8

A chair as set forth in claim 5 wherein said chair body has a reclinable back and an extensible leg rest and is rockably mounted on said second frame, and including anti-rocker means operative to prevent rocking unless the second frame is in its forwardmost position and the leg rest is unextended.