STAIR SYSTEM

• US 20090235594A1
• Filed: 05/28/2009
• Published: 09/24/2009
• Est. Priority Date: 03/07/2007
• Status: Active Grant

• Current Assignee: Yong Hwan Won
• Original Assignee: Yong Hwan Won
• Inventors: Won, Yong Hwan
• Granted Patent: US 8,033,063 B2
• Time in Patent Office: Days
• US Class Current: 52/179
• CPC Class Codes: E04F 11/02 Stairways; Layouts thereof
• CPC Class Codes: E04F 11/108 of wood or with an upper layer of wood
• CPC Class Codes: E04F 11/16 Surfaces thereof; Protecting means for edges or corners thereof loosely laid coverings, floor fabrics, fastenings therefor A47G27/00

Abstract

A stair system including an upper tread having a substantially planar body portion, a stair nose portion located at one side of the planar body portion, and a dado located behind the stair nose portion, at least one lower tread, the lower tread having a substantially planar body portion, a stair nose portion located at one side of the planar body portion, a dado located behind the stair nose portion, and a groove located at a side opposite the stair nose portion, and at least two risers, each riser having a substantially planar body portion. In the stair system, one of the at least two risers is receivable between the dado of the upper tread and the groove of the lower tread and the other of the at least two risers is receivable in the dado of the lower tread.

Claims

1. A stair system comprising:

a tread having a substantially planar body portion, a stair nose portion located at one side of the planar body portion, a dado located behind the stair nose portion, and a first plurality of grooves located at a side opposite the stair nose portion;

a first riser having a substantially planar body portion, the first riser being received in one of the first plurality of grooves; and

a second riser having a substantially planar body portion, the second riser being received in the dado of the tread.

2. The stair system according to claim 1, wherein the first plurality of grooves are spaced closer towards the side opposite the stair nose portion.

3. The stair system according to claim 1, wherein the first plurality of grooves are substantially evenly spaced between the stair nose portion and the side opposite the stair nose portion.

4. The stair system according to claim 1, wherein at least one of the first plurality of grooves is selected from a rectangular cut-out, a substantially circular cut-out, and a triangular cut-out.

5. The stair system according to claim 1, wherein each of the first plurality of grooves is selected from a rectangular cut-out, a substantially circular cut-out, and a triangular cut-out.

6. The stair system according to claim 5, wherein all of the first plurality of grooves have substantially the same cut-out.

7. The stair system according to claim 1, further comprising a molding located beneath the tread and adjacent the dado of the tread.

8. The stair system according to claim 7, wherein the molding is affixed to at least one of the tread and the second riser.

9. The stair system according to claim 1, wherein the stair nose of the tread includes a second groove formed thererin.

10. The stair system according to claim 1, wherein the stair nose of the tread includes a plurality of second grooves formed thererin.

11. The stair system according to claim 10, wherein at least one of the second plurality of grooves is selected from a rectangular cut-out, a substantially circular cut-out, and a triangular cut-out.

12. The stair system according to claim 10, wherein each of the second plurality of grooves is selected from a rectangular cut-out, a substantially circular cut-out, and a triangular cut-out.

13. The stair system according to claim 12, wherein all of the second plurality of grooves have substantially the same cut-out.

14. A stair system comprising:

an upper tread having a substantially planar body portion, a stair nose portion located at one side of the planar body portion, and a dado located behind the stair nose portion;

at least one lower tread, the lower tread having a substantially planar body portion, a stair nose portion located at one side of the planar body portion, a dado located behind the stair nose portion, and a groove located at a side opposite the stair nose portion; and

at least two risers, each riser having a substantially planar body portion,

one of the at least two risers being receivable between the dado of the upper tread and the groove of the lower tread,

the other of the at least two risers being receivable in the dado of the lower tread.

15. The stair system according to claim 14, wherein the groove of the at least one lower tread is formed in an upper surface of the planar body portion.

16. The stair system according to claim 15, wherein the groove of the at least one lower tread is a rabbet.

17. The stair system according to claim 15, wherein the groove of the at least one lower tread is a dado.

18. The stair system according to claim 14, wherein the at least one lower tread includes a plurality of lower treads, each of the lower tread having a substantially planar body portion, a stair nose portion located at one side of the planar body portion, a dado located behind the stair nose portion, and a groove located at a side opposite the stair nose portion;

and

wherein the at least two risers includes a plurality of risers such that the number of risers corresponds to the number of lower treads plus the upper riser.

19. The stair system according to claim 14, wherein the stair nose portions of the upper tread has a thickness substantially equal to the thickness of the planar body portion of the upper tread and the stair nose portion of the at least one lower tread has a thickness substantially equal to the thickness of the planar body portion of the at least one lower tread.

20. The stair system according to claim 14, wherein the stair nose portions of the upper tread has a thickness greater than the thickness of the planar body portion of the upper tread and the stair nose portion of the at least one lower tread has a thickness greater than the thickness of the planar body portion of the at least one lower tread.

21. The stair system according to claim 14, further comprising:

at least two stringers, each stringer having a plurality of tread sides and a plurality of riser sides;

a plurality of tread sub-floorings corresponding to the plurality of tread sides, each of the plurality of tread sub-floorings spanning between the at least two stringers and affixed to corresponding tread sides;

a plurality of riser sub-floorings corresponding to the plurality of riser sides, each of the plurality of riser sub-floorings spanning between the at least two stringers and affixed to corresponding riser sides.

22. The stair system according to claim 21, wherein the upper tread is affixed to one of the plurality of tread sub-floorings, the at least one lower tread is affixed to another of the plurality of tread sub-floorings, and each of the at least two risers are affixed to different riser sub-floorings.

23. The stair system according to claim 21, wherein an end of each of the tread sub-flooring extends beyond the lower adjacent riser sub-flooring such that the riser sub-flooring is recessed behind the end of the tread sub-flooring.

24. The stair system according to claim 23, wherein the upper tread is affixed to one of the plurality of tread sub-floorings and the at least one lower tread is affixed to another of the plurality of tread sub-floorings.

25. The stair system according to claim 24, wherein each of the plurality of risers are affixed to the corresponding dado.

26. The stair system according to claim 25, wherein each of the plurality of risers are affixed to the end of the upper adjacent tread sub-flooring.