Chair with extendable and retractable ganging system

1. A chair device, comprising:

a) a frame having legs, a seat hoop carried by the legs, and a backrest extending above the seat hoop, the seat hoop having a thickness between upper and lower surfaces;

b) a seat carried by the seat hoop of the frame, and having a seat base with a cushion thereon;

c) the seat base having a perimeter lip circumscribing the seat base and resting over the seat hoop; and

d) a ganging member affixed to the seat base and extending laterally beyond the seat hoop between the perimeter lip of the seat base and the seat hoop of the frame, configured to engage another ganging member of an adjacent chair.

2. The chair device in accordance with claim 1 , wherein the ganging member is slidably coupled to the seat base so that the ganging member can extend and retract with respect to the seat base.

3. The chair device in accordance with claim 1 , wherein the ganging member comprises a rod bent in a U-shape and having free ends affixed to the seat base, horizontal arms resting over the seat hoop, and a closed end bent to extend vertically.

4. The chair device in accordance with claim 1 , further comprising:

a notch formed in a lower edge of the seat base of the seat and forming an aperture between the notch and the seat hoop of the frame; and the ganging member extending from the aperture between the seat base of the seat and the seat hoop of the frame.

5. The chair device in accordance with claim 1 , further comprising:

a bumper affixed to the seat base and extending laterally beyond the seat hoop between the perimeter lip of the seat base and the seat hoop of the frame, configured to abut to an adjacent chair or corresponding bumper of the adjacent chair.

6. The chair device in accordance with claim 1 , further comprising:

a guide disposed on a bottom of the seat base of the seat and clamping the ganging member to the bottom of the seat base.

7. The chair device in accordance with claim 1 , wherein the ganging member comprises:

at least one male-type ganging member disposed on one side of the seat base;

at least one female-type ganging member disposed on another opposite side of the seat base; and

the at least one male-type ganging member being configured to engage at least one female-type ganging member of an adjacent chair, the at least one female-type ganging member being configured to engage at least one male-type ganging member of another adjacent chair; wherein adjacent male-type and female-type ganging members engage and interlock.

8. The chair device in accordance with claim 1 , further comprising:

a bottom projection projecting from the seat base and into the seat hoop, and having a bottom surface substantially flush with the lower surface of the seat hoop.

9. The chair device in accordance with claim 1 , wherein the seat base has a thickness greater than the seat hoop and extends from the lower surface of the seat hoop to above the seat hoop.

10. The chair device in accordance with claim 1 , further comprising:

a) the seat base having a flexible and resilient corrugated interior capable of deflecting under weight and returning when the weight is removed; and

b) the seat base having an annular bottom projection projecting from the seat base between the perimeter lip and the corrugated interior and into the seat hoop, and having an annular bottom surface substantially flush with the lower surface of the seat hoop; and

c) the seat base being formed as a single continuous monolithic body.

11. The chair device in accordance with claim 10 , wherein the annular bottom surface of the seat base abuts to a top of a seat of a lower chair when stacked thereon to resist the seat hoop from sinking into the seat of the lower chair.

12. The chair device in accordance with claim 1 , further comprising:

a plurality of holes in an interior wall of the seat hoop; and

a plurality of corresponding tabs on the seat base.

13. A chair device, comprising:

a) a frame having legs, a seat hoop carried by the legs, and a backrest extending above the seat hoop, the seat hoop having a thickness between upper and lower surfaces;

b) a seat carried by the seat hoop of the frame, and having a seat base with a cushion thereon;

c) a perimeter lip circumscribing the seat base and resting over the seat hoop;

d) a bottom projection projecting from the seat base and into the seat hoop, and having a bottom surface substantially flush with the lower surface of the seat hoop;

e) at least one male-type ganging member disposed on one side of the seat base;

f) at least one female-type ganging member disposed on another opposite side of the seat base;

g) the at least one male-type ganging member and the at least one female-type ganging member affixed to the seat base and extending laterally beyond the seat hoop between the perimeter lip of the seat base and the seat hoop of the frame; and

h) the at least one male-type ganging member being configured to engage at least one female-type ganging member of an adjacent chair, the at least one female-type ganging member being configured to engage at least one male-type ganging member of another adjacent chair; wherein adjacent male-type and female-type ganging members engage and interlock.

14. The chair device in accordance with claim 13 , wherein each of the at least one male-type ganging member and the at least one female-type ganging member is slidably coupled to the seat base to extend and retract with respect to the seat base.

15. The chair device in accordance with claim 13 , further comprising:

a pair of notches each formed in a lower edge of the seat base of the seat on opposite sides of the seat base, and forming a pair of apertures between the pair of notches and the seat hoop of the frame; and each of the at least one male-type ganging member and the at least one female-type ganging member extending from different ones of the pair of apertures between the seat base of the seat and the seat hoop of the frame.

16. The chair device in accordance with claim 13 , wherein each of the at least one male-type ganging member and the at least one female-type ganging member comprises a rod bent in a U-shape and having free ends affixed to the seat base, horizontal arms resting over the seat hoop, and a closed end bent to extend vertically.

17. The chair device in accordance with claim 13 , further comprising:

a pair of guides disposed on a bottom of the seat base of the seat and each clamping a different one of the at least one male-type ganging member and the at least one female-type ganging member to the bottom of the seat base.

18. A chair device, comprising:

a) a frame having legs, a seat hoop carried by the legs, and a backrest extending above the seat hoop, the seat hoop having a thickness between upper and lower surfaces;

b) a seat carried by the seat hoop of the frame, and having a seat base with a cushion thereon;

c) a perimeter lip circumscribing the seat base and resting over the seat hoop;

d) a bottom projection projecting from the seat base and into the seat hoop, and having a bottom surface substantially flush with the lower surface of the seat hoop;

e) a ganging member affixed to the seat base and extending laterally beyond the seat hoop between the perimeter lip of the seat base and the seat hoop of the frame, configured to engage another ganging member of an adjacent chair;

f) a notch formed in a lower edge of the seat base of the seat and forming an aperture between the notch and the seat hoop of the frame; and the ganging member extending from the aperture between the seat base of the seat and the seat hoop of the frame; and

g) the ganging member is slidably coupled to the seat base so that the ganging member can extend and retract with respect to the seat base.

19. The chair device in accordance with claim 18 , wherein the ganging member comprises a rod bent in a U-shape and having free ends affixed to the seat base, horizontal arms resting over the seat hoop, and a closed end bent to extend vertically.

20. The chair device in accordance with claim 18 , further comprising:

a guide disposed on a bottom of the seat base of the seat and clamping the ganging member to the bottom of the seat base.