Chair with coupling companion stool base

1. A convertible desk chair consisting of a pedestal base and a chair portion releasably attachable to said base; wherein:

said chair portion includes a seat, a backrest, and a molded plastic frame;

said frame including a first portion supportingly attached to the backrest, and second portion supportingly underlying and attached to said seat, said second portion integrally forming a set of fore-and-aft extending rails substantially beneath said seat for supporting said chair portion on a surface when detached from said base portion;

the pedestal base having a single columnar support and a generally quadrilateral saddle fixedly mounted to the top of said support;

said frame second portion configured to couple with the saddle beneath said seat and between said rails to releasably secure the chair portion to the pedestal base;

said second frame portion carrying a fixed attachment element in the form of a claw member configured to engage said saddle at a first location and, spaced rearwardly therefrom, a movable attachment element configured to engage said saddle at another location;

said rails being of such depth relative to the seat as to engage a support surface only when the chair portion is decoupled from the saddle and placed on a support surface.

2. The convertible desk chair described in claim 1 wherein the rails are configured to provide various pitch angles for the chair portion, when the chair portion is separated from the base and placed with said rails on a substantially flat support surface.

3. A convertible desk chair as described in claim 1 wherein the fixed attachment element is disposed forwardly of the seat relative to the moveable attachment element.

4. A convertible desk chair as defined in claim 1 wherein the pedestal base comprises a plurality of radial legs radiating outwardly from to the bottom end of said columnar support.

5. A convertible desk chair as defined in claim 4 wherein the columnar support of the pedestal base is adjustable in height.

6. A convertible desk chair as defined in claim 1 wherein the pedestal base incorporates manually operable tilt and swivel mechanisms.

7. A convertible desk chair as defined in claim 1 wherein the height of the pedestal base is such as to make the saddle accessible as a writing surface to a user seated in the chair portion when separated from the pedestal base and resting on a floor adjacent the pedestal base.

8. A convertible desk chair consisting essentially of a pedestal base and a chair portion releaseably attachable to said pedestal base wherein:

said chair portion includes a seat, a backrest, and a substantially rigid frame extending between and attached to the seat and the backrest to join the seat and backrest into a unit;

said frame further including a set of fore-and-aft extending rails that underlie the seat and extend downwardly there from and substantially within a vertical projection thereof;

the pedestal base includes radial legs, a columnar support and a saddle mounted on top of said columnar support and having a generally quadrilaterally arranged set of peripheral side edges;

an attachment mechanism including a claw fixedly attached to the front of the chair frame for engagement with the saddle at a forward location and manually operable latching mechanism carried by the frame for engagement with and disengagement from the saddle at a location rearwardly of the claw whereby the chair can be locked to and unlocked from and disengaged from the saddle; and

said fore-and-aft extending rails being configured so as to lie against a support surface to support the chair portion when the chair portion is disengaged from the saddle and placed on a support surface.

9. The convertible desk chair as defined in claim 8 wherein the rails are shaped to permit the chair portion, when disengaged from the saddle and resting on said support surface, to assume different pitch angles.

10. A desk chair convertible into a low-to-the-floor game chair and a base providing a companion work table for a person sitting in the low-to-the-floor game chair wherein the desk chair consists of:

a game chair having seat and a backrest and a frame interconnecting the seat and backrest, said frame also integrally forming a pair of spaced apart, fore-and-aft extending, floor-engaging legs under the game chair with floor-engaging longitudinal surfaces that allow the game chair to assume at least two different pitch angles on the floor, and to support the game chair on the floor when decoupled from the base;

a pedestal base forming said companion work table when decoupled from the game chair, said pedestal base including a saddle top which can be securely coupled to the game chair at a position immediately under said seat and between said legs, said saddle top being configured for use as a work surface when the game chair is decoupled from the saddle top; and

the height of the pedestal base being such that the saddle top, when the base is decoupled from the game chair, is accessible to a person sitting in the gaming chair on the floor adjacent to the decoupled base.

11. The desk chair defined in claim 10 wherein the frame and legs are fabricated from plastic.

12. The desk chair defined in claim 10 further including a coupling mechanism for releasably joining the game chair to the saddle, said mechanism being operable without the use of tools.

13. The desk chair defined in claim 12 wherein said coupling mechanism includes a claw mounted in the front of the seat and engagable with said saddle when said seat is placed on said saddle to restrict movement between said seat and saddle.