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US 4,988,145 AGranted
Seating furniture
AssigneeRoeder GmbH Sitzmoebelwerke
InventorHartmut S. Engel
Life of this patent
Estimating the term…
Abstract
A functional chair is described the backrest of which can be pivoted relative to the seat and in which the seat can also be lowered in the region of the front edge. For this purpose at least one lowering lever is provided which is mounted on the one hand relative to the seat and on the other hand relative to a fixed axle of the frame and which is adjustably connected, via a transmission for movement in the opposite direction, to a link which is connected with the backrest and is likewise pivotally mounted on a fixed axle of the frame.
Claims34
Seating furniture, comprising:
- a variably inclinable seat including front and rear portions and left and right sides;
- a variably inclinable backrest including upper and lower ends;
- means for connecting said rear portion of said seat to said backrest to permit relative movement therebetween;
- a frame disposed beneath said seat;
- axle means attached to said frame and disposed beneath said front portion of said seat, defining a transverse pivot axis;
- first and second links, situated respectively adjacent said right and left sides of said seat, said links extending generally from said axle means to said backrest and said links being pivotable about said transverse pivot axis;
- spring means positioned between said links and said frame for supporting said links in a cantilever manner extending rearwardly from said axle means, said spring means acting between said links and said frame such that said links are biased into a basic position relative to said frame, in which said seat is in its uppermost position;
- backrest pivot means for pivotally connecting a rear end of each said link to said backrest;
- first and second levers disposed beneath said seat respectively at the left and right sides thereof;
- seat pivot means for pivotally connecting a first end portion of each said lever to said seat;
- frame pivot means for pivotally connecting a second portion of said lever to said frame, said frame pivot means being connected to each said lever at a lever position spaced from said first end thereof;
- and
- means disposed between said links and said levers for transmitting movement of a front end of said links about said transverse pivot axis to said levers;
- said means for transmitting causing a lowering of a front region of the seat on increasing inclination of the seat and corresponding change in inclination of said links.
11 more elements
Seating furniture, comprising:
- a variably inclinable seat including front and rear portions and left and right sides;
- a variably inclinable backrest including front and rear portions and left and right sides;
- means for connecting said rear portion of said seat to said backrest to permit relative movement therebetween;
- a frame disposed beneath said seat, including a horizontally disposed transverse axis;
- first and second links, situated respectively at the left and right sides of said seat, each link including a front end portion and a rear end;
- frame pivot means, situated at said front end portions of said links, for pivotally connecting said links to said frame for pivotal movement about said transverse axis;
- means, situated at said rear ends of said links, for connecting said rear ends of said links to said backrest;
- spring means positioned between said links and said frame for supporting said links in a cantilever manner extending rearwardly from said axle means, said spring means acting between said links and said frame such that said links are biased into a basic position relative to said frame, in which said seat is in its uppermost position;
- lever means disposed generally at and beneath a front portion of said seat for pivotal movement about a horizontal axis, said lever means being pivotally connected at a first end portion to said front portion of said seat and adjacent a second portion to said frame;
- and
- means disposed between said links and said levers for transmitting movement of said links about said transverse axis to said lever means to produce lowering of said front portion of said seat on increasing inclination of said seat.
8 more elements
Seating furniture, comprising:
- a variably inclinable seat including front and rear portions and left and right sides;
- a backrest including upper and lower ends, said backrest variably inclinable as a function of seat inclination;
- means for pivotally connecting said rear portion of said seat to said lower end of said backrest to permit relative movement therebetween;
- a first pivot axle, attached to said frame beneath said front portion of said seat;
- a second pivot axle, attached to said frame and spaced apart from said first pivot axle;
- first and second two-armed levers, pivotally connected to said frame at said first pivot axle, disposed generally beneath said seat respectively at the left and right sides thereof;
- a seat pivot joint for pivotally connecting a first arm of each first and second two-armed lever to said seat;
- third and fourth levers, each having a short arm and a long arm adapted to serve as an armrest carrier, pivotally connected to said frame at said second pivot axle, said levers situated respectively adjacent said left and right sides of said seat;
- an upper end of each said long arm of said third and fourth levers pivotally connected to said backrest;
- slot and pins means for connecting each said short arm of said third and fourth lever with a second arm of each said first and second two-armed lever;
- and
- spring means acting between said third and fourth levers and said frame for biasing said third and fourth levers into a basic position relative to said frame, in which said seat is in its upper most position;
- said slot and pin means being, when in said basic position, disposed substantially on a line projecting from said second pivot axle to said first pivot axle;
- said seat pivot means being, when said seat is in a minimum elevation position, disposed on said projecting line;
- whereby increasing inclination of said seat is transmitted to said levers causing said front edge of said seat to become lowered.
12 more elements
Dependencies are inferred from the claim text.