U.S. patent application number 14/730677 was filed with the patent office on 2015-12-10 for chair with flex member.
The applicant listed for this patent is HNI TECHNOLOGIES INC.. Invention is credited to Trevor Brown, Jeremy Foreman.
Application Number | 20150351552 14/730677 |
Document ID | / |
Family ID | 54768575 |
Filed Date | 2015-12-10 |
United States Patent
Application |
20150351552 |
Kind Code |
A1 |
Brown; Trevor ; et
al. |
December 10, 2015 |
CHAIR WITH FLEX MEMBER
Abstract
A chair includes a first side member, a second side member, a
back cross member, a first flex member, and a second flex member.
The first side member supports a first side of the chair and the
second side member supports a second side of the chair. The back
cross member is situated between the first side member and the
second side member and rotates relative to the first side member
and the second side member. The first flex member is coupled to the
first side member and the back cross member and twists as the back
cross member rotates relative to the first side member and the
second side member. The second flex member is coupled to the second
side member and the back cross member and twists as the back cross
member rotates relative to the first side member and the second
side member.
Inventors: |
Brown; Trevor; (Salem,
IN) ; Foreman; Jeremy; (Bedford, IN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
HNI TECHNOLOGIES INC. |
Muscatine |
IA |
US |
|
|
Family ID: |
54768575 |
Appl. No.: |
14/730677 |
Filed: |
June 4, 2015 |
Related U.S. Patent Documents
|
|
|
|
|
|
Application
Number |
Filing Date |
Patent Number |
|
|
62007591 |
Jun 4, 2014 |
|
|
|
Current U.S.
Class: |
297/331 ; 29/428;
297/286; 297/299 |
Current CPC
Class: |
A47C 3/045 20130101;
Y10T 29/49828 20150115; A47C 7/448 20130101 |
International
Class: |
A47C 7/44 20060101
A47C007/44; A47C 3/04 20060101 A47C003/04 |
Claims
1. A chair comprising: a first side member to support a first side
of the chair on a surface; a second side member to support a second
side of the chair on the surface; a first cross member situated
between the first side member and the second side member, the first
cross member being rotatable relative to the first side member and
the second side member; a first flex member coupled to the first
side member and to the first cross member, the first flex member
configured to twist as the first cross member rotates relative to
the first side member and the second side member; and a second flex
member coupled to the second side member and to the first cross
member, the second flex member configured to twist as the first
cross member rotates relative to the first side member and the
second side member.
2. The chair of claim 1, wherein the first flex member is a first
torsion spring that twists as the first cross member rotates
relative to the first side member and the second side member and
the second flex member is a second torsion spring that twists as
the first cross member rotates relative to the first side member
and the second side member.
3. The chair of claim 1, wherein the first cross member has a cross
member longitudinal axis and the first cross member rotates
relative to the first side member and the second side member around
the cross member longitudinal axis.
4. The chair of claim 3, wherein the first flex member has a flex
member longitudinal axis that is parallel with the cross member
longitudinal axis and the first flex member twists around the flex
member longitudinal axis as the first cross member rotates around
the cross member longitudinal axis.
5. The chair of claim 1, wherein the first flex member is attached
to the first side member with a fastener and the first flex member
twists around a flex member longitudinal axis of the first flex
member that is parallel with a longitudinal axis of the
fastener.
6. The chair of claim 1, wherein at least one of the first flex
member and the second flex member is made of at least one of rubber
and polyurethane.
7. The chair of claim 1, comprising: a chair back coupled to the
first cross member and having a top that moves forward and backward
as the first cross member rotates relative to the first side member
and the second side member.
8. The chair of claim 1, wherein the first flex member is attached
to the first side member with at least one fastener, the first flex
member engaging with the at least one fastener to prevent further
rotation of the first cross member as the first cross member
rotates relative to the first side member and the second side
member.
9. The chair of claim 1, wherein the first flex member is coupled
to the first cross member by an attachment member, the first flex
member engaging with the attachment member to prevent further
rotation of the first cross member as the first cross member
rotates relative to the first side member and the second side
member.
10. The chair of claim 1, wherein: the first side member comprises:
a first leg; and a second leg coupled to the first leg; and the
second side member comprises: a third leg; and a fourth leg coupled
to the third leg.
11. The chair of claim 1, comprising: a second cross member coupled
to the first side member and the second side member; a seat support
connected to the second cross member; and a seat connected to the
seat support to rotate between an up position and a down position,
wherein the seat is supported by the second cross member for
sitting on in the down position.
12. The chair of claim 1, comprising: a first armrest coupled to
the first side member; and a second armrest coupled to the second
side member.
13. A chair comprising: a first side member to support a first side
of the chair on a surface; a second side member to support a second
side of the chair on the surface; a first cross member situated
between the first side member and the second side member, the first
cross member rotatable relative to the first side member and the
second side member; a first flex member secured to the first side
member with at least one first fastener, the first flex member
configured to deform to twist as the first cross member rotates
relative to the first side member and the second side member, and
the at least one first fastener to provide a first stop against the
first cross member to prevent further rotation of the first cross
member; and a second flex member secured to the second side member
with at least one second fastener, the second flex member
configured to deform to twist as the first cross member rotates
relative to the first side member and the second side member, and
the at least one second fastener to provide a second stop against
the first cross member to prevent further rotation of the first
cross member.
14. The chair of claim 13, wherein the first flex member is a first
torsion bar that twists as the first cross member rotates relative
to the first side member and the second side member and the second
flex member is a second torsion bar that twists as the first cross
member rotates relative to the first side member and the second
side member.
15. The chair of claim 13, wherein the first flex member twists
along a longitudinal axis of the first flex member that is parallel
with the longitudinal axes of the at least one first fastener.
16. The chair of claim 13, wherein at least one of the first flex
member and the second flex member is made of at least one of rubber
and polyurethane.
17. The chair of claim 13, comprising: a chair back coupled to the
first cross member and having a top that moves forward and backward
as the first cross member rotates relative to the first side member
and the second side member.
18. The chair of claim 17, wherein the first flex member is coupled
to the first cross member by an attachment member that couples the
chair back to the first cross member.
19. A method of making a chair comprising: fastening a first flex
member to a first side member; fastening a second flex member to a
second side member; and securing a chair back to a first cross
member, wherein securing the chair back to the first cross member
couples the chair back to the first flex member and the second flex
member.
20. The method of claim 19, comprising: fitting a first portion of
the first flex member into the first side member prior to fastening
the first flex member to the first side member.
21. The method of claim 20, comprising: fitting a second portion of
the first flex member into the first cross member prior to securing
the chair back to the first cross member.
22. The method of claim 19, wherein fastening the first flex member
comprises: bolting the first flex member to the first side
member.
23. The method of claim 19, comprising: attaching a second cross
member to the first side member and the second side member; and
rotatably coupling a seat to the second cross member.
24. A chair comprising: a base configured to support the chair on a
surface, the base having a first side and a second side; a seat
maintained by the base; a chair back having a reclined position and
an upright position; and a chair back flex assembly coupling the
chair back to the base, the chair back flex assembly including: a
cross member having a first end and a second end and a longitudinal
axis; a first flex member coupled to the cross member at the first
end of the cross member such that the first flex member elastically
deflects to permit rotation of the cross member about the
longitudinal axis of the cross member as the chair back is moved
from the upright position to the reclined position.
25. The chair of claim 24, further comprising a second flex member
coupled to the cross member at the second end of the cross member
such that the second flex member elastically deflects to permit
rotation of the cross member about the longitudinal axis of the
cross member as the chair back is moved from the upright position
to the reclined position.
26. The chair of claim 24, wherein the first flex member is formed
of a material having a durometer of 95 Shore A.
27. The chair of claim 24, wherein the first flex member is formed
of a substantially solid block of elastomeric material.
28. The chair of claim 24, wherein the first flex member is coupled
to the cross member by an attachment member, the first flex member
engaging with the attachment member to arrest movement of the chair
back beyond the reclined position.
29. The chair of claim 24, wherein a portion of the first flex
member is received within the cross member.
30. The chair of claim 24, wherein the first flex member causes the
chair back to return to the upright position from the reclined
position.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application claims priority to U.S. Provisional
Application No. 62/007,591, filed on Jun. 4, 2014, entitled CHAIR
WITH FLEX MEMBER, which is herein incorporated by reference in its
entirety.
BACKGROUND
[0002] Chair manufacturers continually strive to improve the
comfort, benefits, aesthetics, manufacturability, and utility of
the chairs they produce. Some chairs have features, such as
armrests and a reclining back, for comfort and support. Some chairs
have features, such as folding seats, to occupy less space. Folding
seats can be used in office or residential settings, on buses to
make room for equipment, such as wheelchairs or bicycles, in cars
to provide extra seating, and in stadiums and auditoriums to
facilitate ingress and egress from the seating area, for
example.
SUMMARY
[0003] Some embodiments described in this disclosure relate to a
chair that includes a first side member, a second side member, a
back cross member, a first flex member, and a second flex member.
The first side member supports a first side of the chair on a
surface and the second side member supports a second side of the
chair on the surface. The back cross member is situated between the
first side member and the second side member and rotates relative
to the first side member and the second side member. The first flex
member is coupled to the first side member and the back cross
member, and the first flex member twists as the back cross member
rotates relative to the first side member and the second side
member. The second flex member is coupled to the second side member
and the back cross member, and the second flex member twists as the
back cross member rotates relative to the first side member and the
second side member.
[0004] Some embodiments relate to a chair where the first flex
member is a first torsion spring that twists as the back cross
member rotates relative to the first side member and the second
side member and the second flex member is a second torsion spring
that twists as the back cross member rotates relative to the first
side member and the second side member.
[0005] Some embodiments relate to a chair where the back cross
member has a cross member longitudinal axis and the back cross
member rotates relative to the first side member and the second
side member around the cross member longitudinal axis. Some
embodiments relate to a chair where the first flex member has a
flex member longitudinal axis that is parallel with the cross
member longitudinal axis and the first flex member twists around
the flex member longitudinal axis as the back cross member rotates
around the cross member longitudinal axis.
[0006] Some embodiments described in this disclosure relate to a
chair that includes a first side member, a second side member, a
back cross member, a first flex member, and a second flex member.
The first side member supports a first side of the chair on a
surface and the second side member supports a second side of the
chair on the surface. The back cross member is situated between the
first side member and the second side member and the back cross
member rotates relative to the first side member and the second
side member. The first flex member is secured to the first side
member with at least one first fastener and the first flex member
twists as the back cross member rotates relative to the first side
member and the second side member. The second flex member is
secured to the second side member with at least one second fastener
and the second flex member twists as the back cross member rotates
relative to the first side member and the second side member. The
back cross member rotates and the at least one first fastener
provides a first stop against the back cross member and the at
least one second fastener provides a second stop against the back
cross member to substantially prevent further rotation of the back
cross member.
[0007] Some embodiments relate to a method of making a chair, which
includes: fastening a first flex member to a first side member;
fastening a second flex member to a second side member; and
securing a chair back to a back cross member. Where securing the
chair back to the back cross member couples the chair back to the
first flex member and the second flex member. Some embodiments
relate to a method that includes fitting a first portion of the
first flex member into the first side member prior to fastening the
first flex member to the first side member. Some embodiments relate
to a method that includes fitting a second portion of the first
flex member into the back cross member prior to securing the chair
back to the back cross member.
[0008] Some embodiments described in this disclosure relate to a
chair that includes a base, a seat maintained by the base, a chair
back, and a chair back flex assembly. The base is configured to
support the chair on a surface and has a first side and a second
side. The chair back has a reclined position and an upright
position and the chair back flex assembly couples the chair back to
the base. The chair back flex assembly includes a back cross member
and a first flex member. The back cross member has a first end and
a second end and a longitudinal axis and the first flex member is
coupled to the back cross member at the first end of the back cross
member such that the first flex member elastically deflects to
permit rotation of the back cross member about the longitudinal
axis of the back cross member as the chair back is moved from the
upright position to the reclined position. Some embodiments relate
to a chair including a second flex member coupled to the back cross
member at the second end of the back cross member such that the
second flex member elastically deflects to permit rotation of the
back cross member about the longitudinal axis of the back cross
member as the chair back is moved from the upright position to the
reclined position.
[0009] While multiple embodiments are disclosed, still other
embodiments of the present invention will become apparent to those
skilled in the art from the following detailed description, which
shows and describes illustrative embodiments of the invention.
Accordingly, the drawings and detailed description are to be
regarded as illustrative in nature and not restrictive.
BRIEF DESCRIPTION OF THE DRAWINGS
[0010] FIG. 1 is a diagram illustrating a perspective view of a
chair, according to some embodiments.
[0011] FIG. 2 is a diagram illustrating a side view of the chair of
FIG. 1, according to some embodiments.
[0012] FIG. 3 is a diagram illustrating a top view of the chair of
FIG. 1, according to some embodiments.
[0013] FIG. 4 is a diagram illustrating a front view of the chair
of FIG. 1, according to some embodiments.
[0014] FIG. 5 is a diagram illustrating a back view of the chair of
FIG. 1, according to some embodiments.
[0015] FIG. 6 is a diagram illustrating an enlarged view of a chair
back attached to a chair back flex assembly, according to some
embodiments.
[0016] FIG. 7 is a cross-section diagram taken along the line A-A
in FIG. 6 and illustrating the chair back attached to the chair
back flex assembly, which is attached to the first side member on
the first side of the chair, according to some embodiments.
[0017] FIG. 8 is a diagram illustrating a perspective view of the
back of the first flex member, according to some embodiments.
[0018] FIG. 9 is a diagram illustrating a perspective view of the
front of the first flex member, according to some embodiments.
[0019] FIG. 10 is a diagram illustrating an enlarged front view of
the first side of the chair without the chair back, according to
some embodiments.
[0020] FIG. 11 is a diagram illustrating an enlarged back view of
the first side of the chair including the chair back, according to
some embodiments.
[0021] FIG. 12 is a cross-section diagram of the first side of the
chair taken along the line B-B in FIG. 11 and illustrating
fasteners securing the first flex member to the first side member,
according to some embodiments.
[0022] FIG. 13 is a cross-section diagram of the first side of the
chair taken along the line C-C in FIG. 11 and illustrating the
attachment member coupling the chair back to the back cross member
and the first flex member, according to some embodiments.
[0023] FIG. 14 is a cross-section diagram of the first side of the
chair taken along the line D-D in FIG. 11 and illustrating the
first front leg connected to the first leg extension, which is
attached to the first back leg, according to some embodiments.
[0024] FIG. 15 is a diagram illustrating a bottom perspective view
of the chair of FIG. 1, according to some embodiments.
[0025] FIG. 16 is a diagram illustrating a bottom view of the chair
of FIG. 1, according to some embodiments.
[0026] FIG. 17 is a diagram illustrating the chair of FIG. 1
including a seat that rotates between the down position for sitting
on and the upright position for saving space and storage, according
to some embodiments.
[0027] FIG. 18 is a diagram illustrating a perspective view of a
chair 200, according to some embodiments.
[0028] FIG. 19 is a diagram illustrating a side view of the chair
of FIG. 18, according to some embodiments.
[0029] FIG. 20 is a diagram illustrating a top view of the chair of
FIG. 18, according to some embodiments.
[0030] FIG. 21 is a diagram illustrating a front view of the chair
of FIG. 18, according to some embodiments.
[0031] FIG. 22 is a diagram illustrating a back view of the chair
of FIG. 18, according to some embodiments.
[0032] FIG. 23 is a diagram illustrating a bottom perspective view
of the chair of FIG. 18, according to some embodiments.
[0033] FIG. 24 is a diagram illustrating a bottom view of the chair
of FIG. 18, according to some embodiments.
[0034] FIG. 25 is a diagram illustrating the chair of FIG. 18
including a seat that rotates between the down position for sitting
on and the upright position for saving space and storage, and the
first and second armrests that rotate between a down position and
an upright position, according to some embodiments.
[0035] FIG. 26 is a diagram illustrating chairs stacked for
storage, according to some embodiments.
[0036] FIG. 27 is a diagram illustrating chairs aligned in a row
for storage, according to some embodiments.
[0037] FIG. 28 is a flowchart diagram illustrating a method of
building a chair, according to some embodiments.
DETAILED DESCRIPTION
[0038] FIGS. 1-6 are diagrams illustrating a chair 40 that includes
a chair back 42 that flexes for comfort, according to some
embodiments described in the disclosure. The chair 40 is a
lightweight, armless chair that includes a base 44, a seat 46, and
the chair back 42. The chair back 42 has an upright position and a
reclined position that is illustrated in dashed lines in FIG. 2.
The chair back 42 flexes backward toward the reclined position as a
user leans back in the chair 40 and the chair back 42 returns to
the upright position when the user stops leaning back in the chair
40. In some embodiments, the chair 40 includes armrests.
[0039] FIG. 1 is a diagram illustrating a perspective view of the
chair 40, according to some embodiments, and FIG. 2 is a diagram
illustrating a side view of the chair 40, according to some
embodiments. The base 44 supports the chair 40 on a surface, such
as the floor, and the base 44 maintains the seat 46 and the chair
back 42 off the surface. The base 44 includes a first side member
48 at a first side 50 of the chair 40 and a second side member 52
at a second side 54 of the chair 40. The first side member 48
supports the first side 50 of the chair 40 on the surface and the
second side member 52 supports the second side 54 of the chair 40
on the surface. The first side member 48 is coupled to the second
side member 52 to support the seat 46 and the chair back 42.
[0040] The first side member 48 includes a first front leg 56 and a
first back leg 58 and the second side member 52 includes a second
front leg 60 and a second back leg 62. The first front leg 56 has a
rounded curve shape and is coupled at one end to the first back leg
58 and curves forward toward the surface at the front of the chair
40. The first back leg 58 has a slightly rounded curve shape and is
coupled to the one end of the first front leg 56 and curves from
the coupling toward the surface at the back of the chair 40. The
second front leg 60 has a rounded curve shape and is coupled at one
end to the second back leg 62 and curves forward toward the surface
at the front of the chair 40. The second back leg 62 has a slightly
rounded curve shape and is coupled to the one end of the second
front leg 60 and curves from the coupling toward the surface at the
back of the chair 40.
[0041] Each of the legs 56, 58, 60, and 62 is attached to a
corresponding wheel or caster 64, 66, 68, and 70 near the surface.
The wheels or casters 64, 66, 68, and 70 roll on the surface, such
that the chair 40 can be rolled from one place to another place on
the surface. In some embodiments, each of the legs 56, 58, 60, and
62 includes a leg stub or cover at the surface to maintain the
chair 40 in one place after it has been placed in position on the
surface.
[0042] The seat 46 is coupled to the first side member 48 and the
second side member 52 via a seat support assembly 72 (shown in FIG.
2) and the chair back 42 is coupled to the first side member 48 and
the second side member 52 via a chair back flex assembly 74 (shown
in FIG. 2). In some embodiments, the seat 46 folds into an upright
position to save space and for storing the chair 40.
[0043] FIG. 3 is a diagram illustrating a top view of the chair 40,
according to some embodiments, and FIG. 4 is a diagram illustrating
a front view of the chair 40, according to some embodiments. As
shown in at least FIGS. 3 and 4, the first front leg 56 is coupled
to the first back leg 58 by a first leg extension 76 and the second
front leg 60 is coupled to the second back leg 62 by a second leg
extension 78. The first leg extension 76 is securely attached to
the first back leg 58 and extends from the first back leg 58 toward
the middle or a centerline 80 of the chair 40. The first front leg
56 is securely attached to the first leg extension 76 inside the
first back leg 58, toward the centerline 80 of the chair. The
second leg extension 78 is securely attached to the second back leg
62 and extends from the second back leg 62 toward the centerline 80
of the chair 40. The second front leg 60 is securely attached to
the second leg extension 78 inside the second back leg 62, toward
the centerline 80 of the chair. The first side member 48 includes
the first front leg 56, the first back leg 58, and the first leg
extension 76. The second side member 52 includes the second front
leg 60, the second back leg 62, and the second leg extension
78.
[0044] FIG. 5 is a diagram illustrating a back view of the chair
40, according to some embodiments, and FIG. 6 is a diagram
illustrating an enlarged view of the chair back 42 attached to the
chair back flex assembly 74, according to some embodiments.
[0045] The chair 40 includes the chair back 42 coupled to the base
44 by the chair back flex assembly 74. The chair back 42 includes a
chair back frame 82 and back support material 84. The chair back
frame 82 is a rigid frame that includes a lower crossbar member 86,
two upright members 88 and 90 that extend vertically from the lower
crossbar member 86, and an upper crossbar member 92 that connects
the two upright members 88 and 90 at the top of the chair back 42.
The back support material 84 is attached to the chair back frame
82, including the lower crossbar member 86, the two upright members
88 and 90, and the upper crossbar member 92, to support the back of
the user. In some embodiments, the chair back frame 82 is made from
a rigid material, such as plastic or metal. In some embodiments,
the chair back frame 82 is not a closed curve shape. In some
embodiments, the chair back frame 82 is a different shape having
one or two upright frame members attached to a lower crossbar
member, but without an upper crossbar member.
[0046] The chair back flex assembly 74 includes a back cross member
94, a first flex member 96, and a second flex member 98. The back
cross member 94 includes a first end 100, a second end 102, and a
cross member longitudinal axis 104. The first flex member 96 is
coupled to the back cross member 94 at the first end 100 and the
second flex member 98 is coupled to the back cross member 94 at the
second end 102. Also, the first flex member 96 is coupled to the
first leg extension 76 of the first side member 48 and the second
flex member 98 is coupled to the second leg extension 78 of the
second side member 52, such that the back cross member 94 is
situated between the first side member 48 and the second side
member 52.
[0047] The chair back 42 is coupled to the chair back flex assembly
74 by the lower crossbar member 86, and the chair back flex
assembly 74 couples the chair back 42 to the first side member 48
and the second side member 52 of the base 42. The lower crossbar
member 86 of the chair back frame 82 is coupled to the back cross
member 94 and to each of the first and second flex members 96 and
98 of the chair back flex assembly 74. The back cross member 94
fits into a slot in the lower crossbar member 86, such that the
lower crossbar member 86 fits around the back cross member 94. As
seen from the front of the chair 40, the lower crossbar member 86
covers the front of the back cross member 94 and front portions of
the first and second flex members 96 and 98. As seen from the back
of the chair 40, the lower crossbar member 86 leaves the back of
the back cross member 94 and back portions of the first and second
flex members 96 and 98 uncovered, where a bottom portion 86a of the
lower crossbar member 86 extends below the back cross member 94 and
an upper portion 86b of the lower crossbar member 86 extends above
the back cross member 94. The bottom portion 86a of the lower
crossbar member 86 includes four connection blocks 106a-106d.
Attachment members (not shown in FIG. 6) pass through the upper
portion 86b of the lower crossbar member 86 and the back cross
member 94 and into the four connection blocks 106a-106d to secure
the chair back 42 to the chair back flex assembly 74. The
attachment member secured into connection block 106a also passes
through the first flex member 96, which is inserted into the back
cross member 94, and the attachment member secured into connection
block 106d also passes through the second flex member 96, which is
inserted into the back cross member 94.
[0048] In operation, the chair back 42 is moved between the upright
position and the reclined position, such that the top 108 of the
chair back 42 moves backward and forward and the back cross member
94 rotates around or about the cross member longitudinal axis 104.
The first flex member 96 and the second flex member 98 twist as the
back cross member 94 rotates relative to the stationary first and
second side members 48 and 52. In some embodiments, the top 108 of
the chair back 42 moves between 0.5 and 4 inches. In some
embodiments, the top 108 of the chair back 42 moves between 1.5 and
2 inches. In some embodiments, the flex members 96 and 98 twist or
rotate between 0.125 and 0.25 inches. In some embodiments, less
than 5 pounds of force on the chair back 42 causes the chair back
42 to flex backward.
[0049] The first flex member 96 and the second flex member 98
elastically deflect to permit rotation of the back cross member 94
about the cross member longitudinal axis 104 as the chair back 42
moves between the upright position and the reclined position. In
one aspect, the first flex member 96 is a first torsion spring that
twists as the back cross member 94 rotates relative to the first
side member 48 and the second side member 52, and the second flex
member 98 is a second torsion spring that twists as the back cross
member 94 rotates relative to the first side member 48 and the
second side member 52. The first flex member 96 and the second flex
member 98 cause the chair back 42 to return to the upright position
from the reclined position. In some embodiments, the first flex
member 96 has a flex member longitudinal axis that is parallel with
the cross member longitudinal axis 104 and the first flex member 96
twists or rotates around the flex member longitudinal axis as the
back cross member 94 rotates around the cross member longitudinal
axis 104. In some embodiments, the second flex member 98 has a flex
member longitudinal axis that is parallel with the cross member
longitudinal axis 104 and the second flex member 98 twists or
rotates around the flex member longitudinal axis as the back cross
member 94 rotates around the cross member longitudinal axis
104.
[0050] FIG. 7 is a cross-section diagram taken along the line A-A
in FIG. 6 and illustrating the chair back 42 attached to the chair
back flex assembly 74, which is attached to the first side member
48 on the first side 50 of the chair 40, according to some
embodiments. The front 120 of the chair 40 is at the top of FIG. 7
and the back 122 of the chair 40 is at the bottom of FIG. 7. The
first side 50 of the chair 40 and the second side 54 of the chair
40 are similar, except for being mirror images of each other, such
that describing the first side 50 suffices to describe the second
side 54.
[0051] The chair back 42 includes the chair back frame 82 and the
back support material 84. The back support material 84 is attached
to the chair back frame 82, including the lower crossbar member 86,
the two upright members 88 and 90, and the upper crossbar member
92. As illustrated in FIG. 7, the back support material 84 is
applied across the chair back frame 82 and secured in a slot 124 of
the chair back frame 82. In other embodiments, the back support
material 84 can be attached to the chair back frame 82 in another
suitable manner.
[0052] The chair back flex assembly 74 includes the back cross
member 94 attached to the first flex member 96. The back cross
member 94 is fit against the lower crossbar member 86 of the chair
back frame 82, with an alignment stub 126 of the lower crossbar
member 86 inserted into an alignment hole 128 of the back cross
member 94. Also, the first end 100 of the back cross member 94
receives a cross member portion 96a (also shown in FIGS. 8 and 9)
of the first flex member 96.
[0053] To couple the chair back 42 to the chair back flex assembly
74 on the first side 50, a first attachment member 130a is inserted
through the upper portion 86b (shown in FIG. 6) of the lower
crossbar member 86 and through holes in the back cross member 94
and the cross member portion 96a of the first flex member 96,
before being secured to the connection block 106a of the bottom
portion 86a (shown in FIG. 6) of the lower crossbar member 86.
Also, a second attachment member 130b is inserted through the upper
portion 86b of the lower crossbar member 86 and through holes in
the back cross member 94, before being secured to the connection
block 106b of the bottom portion 86a of the lower crossbar member
86. The first and second attachment members 130a and 130b and
similar attachment members on the second side 54 of the chair 40
secure the chair back 42 to the chair back flex assembly 74.
[0054] To attach the chair back flex assembly 74 to the first side
member 48 of the chair 40, an extension portion 96b (also shown in
FIGS. 8 and 9) of the first flex member 96 is inserted into the
first leg extension 76 of the first side member 48. Fasteners (not
shown in FIG. 7) are inserted through the extension portion 96b of
the first flex member 96 and secured to the first leg extension 76.
The second flex member 98 is similarly secured to the second leg
extension 78 on the second side 54 of the chair 40.
[0055] FIGS. 8 and 9 are diagrams illustrating the first flex
member 96, according to some embodiments described in the
disclosure. FIG. 8 is a diagram illustrating a perspective view of
the back of the first flex member 96, according to some
embodiments, and FIG. 9 is a diagram illustrating a perspective
view of the front of the first flex member 96, according to some
embodiments. The first flex member 96 and the second flex member 98
are similar, except for being mirror images of each other, such
that describing the first flex member 96 suffices to describe the
second flex member 98.
[0056] The first flex member 96 includes the cross member portion
96a, the extension portion 96b, and a middle portion 96c that is
between the cross member portion 96a and the extension portion 96b.
The outer perimeter of the middle portion 96c is larger than the
outer perimeter of the cross member portion 96a, and the outer
perimeter of the middle portion 96c is larger than the outer
perimeter of the extension portion 96b. As a result, after the
cross member portion 96a is inserted into the first end 100 of the
back cross member 94 and the extension portion 96b is inserted into
the first leg extension 76, the outer perimeter of the middle
portion 96c is flush with the back cross member 94 and the first
leg extension 76. Also, the middle portion 96c is visible between
the back cross member 94 and the first leg extension 76 and, in the
completed chair 40, visible from the back 122 of the chair 40.
[0057] The cross member portion 96a includes a through hole 140
that extends from the top 142 of the first flex member 96 through
the bottom 144 of the first flex member 96. The attachment member
130a is inserted through this hole 140 to couple the chair back 42
to the back cross member 94 and the first flex member 96. The cross
member portion 96a also includes two longitudinal slots 146a and
146b in the front of the first flex member 96. The longitudinal
slots 146a and 146b extend longitudinally from one side 148 of the
first flex member 96 to indentations 150a and 150b in the middle
portion 96c. The longitudinal slots 146a and 146b are for receiving
fasteners, such as bolts, that are slid into the middle portion 96c
and the extension portion 96b and secured to the first leg
extension 76.
[0058] The middle portion 96c and the extension portion 96b include
two longitudinal through holes 152a and 152b that extend from the
middle portion 96c through the other side 154 of the first flex
member 96. These two holes 152a and 152b receive the fasteners that
are inserted through the middle portion 96c and the extension
portion 96b and secured to the first leg extension 76 to secure the
first flex member 96 to the first side member 48. The heads of the
fasteners, such as the heads of bolts, are situated in the
longitudinal slots 146a and 146b of the cross member portion 96a to
hold the first flex member 96 tightly to the first leg extension
76.
[0059] The first flex member 96 is a torsion spring that twists
around or about a flex member longitudinal axis 156 as the chair
back 42 flexes backward. In one aspect, the first flex member 96 is
a torsion bar that twists as the back cross member 94 rotates
relative to the first side member 48 and the second side member 52.
The flex member longitudinal axis is parallel with the longitudinal
axes of the fasteners that connect the first flex member 96 to the
first leg extension 76. In some embodiments, the flex member
longitudinal axis 156 is parallel with the cross member
longitudinal axis 104 and the first flex member 96 twists around
the flex member longitudinal axis 154 as the back cross member 94
rotates around the cross member longitudinal axis 104.
[0060] In some embodiments, the first flex member 96 is formed of a
substantially solid block of elastomeric material. In some
embodiments, the first flex member 96 is made of at least one of
rubber, urethane, and polyurethane. In some embodiments, the first
flex member 96 is formed of a material having a durometer of 95
Shore A.
[0061] FIG. 10 is a diagram illustrating an enlarged front view of
the first side 50 of the chair 40 without the chair back 42,
according to some embodiments. As previously described, the first
side 50 of the chair 40 and the second side 54 of the chair 40 are
similar, except for being mirror images of each other, such that
describing the first side 50 suffices to describe the second side
54.
[0062] The first side member 48 includes the first front leg 56 and
the first back leg 58 connected to the first leg extension 76. The
extension portion 96b of the first flex member 96 is inserted into
the first leg extension 76 and fasteners (not shown in FIG. 10) are
inserted through the two holes 152a and 152b in the first flex
member 96 and secured to the first leg extension 76. This secures
the first flex member 96 to the first side member 48. The heads of
the fasteners, such as the heads of bolts, are situated in the
longitudinal slots 146a and 146b of the cross member portion 96a to
hold the first flex member 96 tightly to the first leg extension
76.
[0063] The chair back flex assembly 74 includes the first flex
member 96, the second flex member 98, and the back cross member 94.
The cross member portion 96a of the first flex member 96 is
inserted into the first end 100 of the back cross member 94 and the
through hole 140 in the cross member portion 96a is aligned with
top and bottom holes in the back cross member 94, such as top hole
162. After the first flex member 96 has been inserted into the
first leg extension 76 and the back cross member 94, the middle
portion 96c is visible between the back cross member 94 and the
first leg extension 76. Also, the outer perimeter of the middle
portion 96c is flush with the back cross member 94 and the first
leg extension 76.
[0064] The attachment member 130a (shown in FIG. 7) is inserted
through the upper portion 86b of the chair back frame 82 (not shown
in FIG. 10) and through the top hole 162 and a bottom hole in the
back cross member 94 and the hole 140 in the first flex member 96
and secured into the connection block 106a, to couple together the
chair back 42 and the back cross member 94 and the first flex
member 96 of the chair back flex assembly 74.
[0065] FIG. 11 is a diagram illustrating an enlarged back view of
the first side 50 of the chair 40 including the chair back 42,
according to some embodiments. As previously described, the first
side 50 of the chair 40 and the second side 54 of the chair 40 are
similar, except for being mirror images of each other, such that
describing the first side 50 suffices to describe the second side
54.
[0066] The first side member 48 includes the first front leg 56 and
the first back leg 58 connected to the first leg extension 76. The
extension portion 96b of the first flex member 96 is inserted into
the first leg extension 76 and fasteners (not shown in FIG. 11) are
inserted through the two holes 152a and 152b in the first flex
member 96 and secured to the first leg extension 76. This secures
the first flex member 96 to the first side member 48. The heads of
the fasteners are situated in the cross member portion 96a to hold
the first flex member 96 to the first leg extension 76.
[0067] The cross member portion 96a of the first flex member 96 is
inserted into the first end 100 of the back cross member 94. The
through hole 140 in the cross member portion 96a is aligned with a
hole in the upper portion 86b of the chair back frame 82 and the
top hole 162 and the bottom hole in the back cross member 94. After
the first flex member 96 has been inserted into the first leg
extension 76 and into the back cross member 94, the middle portion
96c is visible between the back cross member 94 and the first leg
extension 76. Also, the outer perimeter of the middle portion 96c
is flush with the back cross member 94 and the first leg extension
76.
[0068] The attachment member 130a (shown in FIG. 7) is inserted
through the hole in the upper portion 86b and through the top hole
162 and the bottom hole in the back cross member 94 and the hole
140 in the first flex member 96 and secured into the connection
block 106a. This couples the chair back 42 to the back cross member
94 and the first flex member 96 and to the first side member
48.
[0069] FIG. 12 is a cross-section diagram of the first side 50 of
the chair 40 taken along the line B-B in FIG. 11 and illustrating
fasteners 164a and 164b securing the first flex member 96 to the
first side member 48, according to some embodiments. The front 120
of the chair 40 is at the left side of FIG. 12 and the back 122 of
the chair 40 is at the right side of FIG. 12. As previously
described, the first side 50 of the chair 40 and the second side 54
of the chair 40 are similar, except for being mirror images of each
other, such that describing the first side 50 suffices to describe
the second side 54.
[0070] The back cross member 94 is a rectangular hollow tube that
fits into a slot 166 in the lower crossbar member 86 of the chair
back frame 82. The slot 166 is at least partially defined by the
bottom portion 86a and the upper portion 86b of the lower crossbar
member 86. The bottom portion 86a of the lower crossbar member 86
extends below the back cross member 94 and the upper portion 86b of
the lower crossbar member 86 extends above the back cross member
94. The back support material 84 of the chair 40 is attached to the
lower crossbar member 86 in front of the back cross member 94.
[0071] As shown in FIGS. 10-12, the first side member 48 includes
the first front leg 56 and the first back leg 58 connected to the
first leg extension 76 and the extension portion 96b of the first
flex member 96 is inserted into the first leg extension 76. The
fasteners 164a and 164b are inserted through the two holes 152a and
152b in the first flex member 96 and secured to the first leg
extension 76. This secures the first flex member 96 to the first
side member 48. The heads of the fasteners 164a and 164b are
situated in the longitudinal slots 146a and 146b of the cross
member portion 96a to hold the first flex member 96 to the first
leg extension 76.
[0072] In operation, the chair back 42 is flexed from the upright
position to the reclined position, such that the top 108 of the
chair back 42 moves backward and the back cross member 94 rotates
around or about the cross member longitudinal axis 104. The first
flex member 96 twists as the back cross member 94 rotates relative
to the stationary first side member 48. To help prevent further
backward movement of the chair back 42 and to help prevent further
rotation of the first cross member 94, the fastener 164a engages
the back cross member 94 toward the front 120 of the chair 40 and
the back cross member 94, knocking against the back cross member 94
to stop rotation of the back cross member 94 and backward movement
of the chair back 42.
[0073] Also, if the chair back 42 is flexed forward, such that the
top 108 of the chair back 42 moves forward and the back cross
member 94 rotates around or about the cross member longitudinal
axis 104. To help prevent further forward movement of the chair
back 42 and to help prevent further rotation of the first cross
member 94, the fastener 164b engages the back cross member 94
toward the front 120 of the chair 40 and the back cross member 94,
knocking against the back cross member 94 to stop rotation of the
back cross member 94 and forward movement of the chair back 42.
[0074] FIG. 13 is a cross-section diagram of the first side 50 of
the chair 40 taken along the line C-C in FIG. 11 and illustrating
the attachment member 130a coupling the chair back 42 to the back
cross member 94 and the first flex member 96, according to some
embodiments. The front 120 of the chair 40 is at the left side of
FIG. 13 and the back 122 of the chair 40 is at the right side of
FIG. 13. As previously described, the first side 50 of the chair 40
and the second side 54 of the chair 40 are similar, except for
being mirror images of each other, such that describing the first
side 50 suffices to describe the second side 54.
[0075] The attachment member 130a extends through a hole in the
upper portion 86b of the lower crossbar member 86, such that the
head of the attachment member 130a is situated above the upper
portion 86b. The shaft of the attachment member 130a passes through
the top hole 162 (shown in FIG. 10) and a bottom hole in the back
cross member 94 and through the hole 140 (shown in FIGS. 8-10) in
the cross member portion 96a of the first flex member 96. The
attachment member 130a is secured to the connection block 106a to
couple together the chair back 42, the back cross member 94, and
the first flex member 96. Also, as described above, the fasteners
164a and 164b are inserted through the two holes 152a and 152b in
the first flex member 96 and secured to the first leg extension 76
to secure the first flex member 96 to the first side member 48.
Thus, the chair back 42 is coupled to the back cross member 94, the
first flex member 96, and the first side member 48.
[0076] In operation, the chair back 42 flexes from the upright
position to the reclined position, such that the top 108 of the
chair back 42 moves backward. The attachment member 130a engages
the back cross member 94 and the first flex member 96 as the chair
back 42 flexes backward, and the first flex member 96 twists as the
back cross member 94 rotates relative to the stationary first side
member 48. The twisting first flex member 96 arrests further
rotation of the back cross member 94 as it rotates relative to the
first side member 48 and the second side member 52.
[0077] FIG. 14 is a cross-section diagram of the first side 50 of
the chair 40 taken along the line D-D in FIG. 11 and illustrating
the first front leg 56 connected to the first leg extension 76,
which is attached to the first back leg 58, according to some
embodiments. The front 120 of the chair 40 is at the left side of
FIG. 14 and the back 122 of the chair 40 is at the right side of
FIG. 14. As previously described, the first side 50 of the chair 40
and the second side 54 of the chair 40 are similar, except for
being mirror images of each other, such that describing the first
side 50 suffices to describe the second side 54.
[0078] The first front leg 56 is a hollow tubular member and the
first leg extension 76 is inserted into one end 170 of the first
front leg 56. A leg fastener 172 is connected to the first leg
extension 76 and inserted inside the first front leg 56 to secure
the first front leg 56 to the first leg extension 76. The fasteners
164a and 164b (shown in FIG. 12) are inserted through the first
flex member 96 and secured to the first leg extension 76 in the
holes 174a and 174b to secure the first flex member 96 to the first
side member 48.
[0079] FIGS. 15 and 16 are diagrams illustrating the bottom of the
chair 40 and support for the seat 46, according to some embodiments
described in the disclosure. FIG. 15 is a diagram illustrating a
bottom perspective view of the chair 40, according to some
embodiments, and FIG. 16 is a diagram illustrating a bottom view of
the chair 40, according to some embodiments.
[0080] The base 44 supports the chair 40 on a surface and the base
44 maintains the seat 46 and the chair back 42 off the surface. The
base 44 includes the first side member 48 at the first side 50 of
the chair 40 and the second side member 52 at the second side 54 of
the chair 40. The first side member 48 supports the first side 50
of the chair 40 on the surface and the second side member 52
supports the second side 54 of the chair 40 on the surface. The
first side member 48 includes the first front leg 56, the first
back leg 58, and the first leg extension 76, and the second side
member 52 includes the second front leg 60, the second back leg 62,
and the second leg extension 78.
[0081] The seat 46 is coupled to the first side member 48 and the
second side member 52 via the seat support assembly 72 that
includes a seat cross member 180 and a seat support 182. The seat
cross member 180 is attached to the first front leg 56 and the
second front leg 60 and couples the first side member 48 to the
second side member 52. The seat support 182 includes a U-shaped
bracket 184 connected to the seat cross member 180 and a seat
platform 186 rotatably connected to the U-shaped bracket 184. The
seat 46 is connected to the seat platform 186, such that the seat
rotates between a down, sitting position and an upright position.
In the down, sitting position the seat 46 is supported by the seat
cross member 180 for sitting on in the down position. The seat 46
folds from the sitting position to the upright position to save
space and for storing the chair 40.
[0082] FIG. 17 is a diagram illustrating the chair 40 including the
seat 46 that rotates between the down position for sitting on and
the upright position for saving space and storage, indicated in
dashed lines, according to some embodiments.
[0083] FIGS. 18-25 are diagrams illustrating a chair 200 that is
the same as the chair 40 with the exception that the chair 200
includes a first armrest 202 and a second armrest 204, according to
some embodiments described in the disclosure. As in the chair 40,
the chair 200 includes the chair back 42 that has an upright
position and a reclined position, illustrated in dashed lines in
FIGS. 2 and 19. The chair back 42 flexes backward toward the
reclined position as a user leans back in the chair 200 and the
chair back 42 returns to the upright position when the user stops
leaning back in the chair 200. Since the chair 200 is similar to
the chair 40, the components of the chair 200 that are the same as
the components of the chair 40 have like numerals. Also, to avoid
being unnecessarily repetitive, the components and features of the
chair 200 that have been previously described in relation to the
chair 40 will not be repeated here.
[0084] FIG. 18 is a diagram illustrating a perspective view of the
chair 200, according to some embodiments, and FIG. 19 is a diagram
illustrating a side view of the chair 200, according to some
embodiments. The first armrest 202 includes a first armrest support
member 202a and a first armrest pad member 202b, and the second
armrest 204 includes a second armrest support member 204a and a
second armrest pad member 204b. The first armrest support member
202a is connected to the first back leg 58 of the first side member
48 at the top of the first back leg 58, and the first armrest pad
member 202b is connected to the first armrest support member 202a.
The second armrest support member 204a is connected to the second
back leg 62 of the second side member 52 at the top of the second
back leg 62, and the second armrest pad member 204b is connected to
the second armrest support member 204a. In some embodiments, the
first armrest pad member 202b is rotatably connected to the first
armrest support member 202a to rotate into at least a partially
upright vertical position. In some embodiments, the second armrest
pad member 204b is rotatably connected to the second armrest
support member 204a to rotate into at least a partially upright
vertical position as indicated in dashed lines in FIG. 19.
[0085] FIG. 20 is a diagram illustrating a top view of the chair
200, according to some embodiments, FIG. 21 is a diagram
illustrating a front view of the chair 200, according to some
embodiments, and FIG. 22 is a diagram illustrating a back view of
the chair 200, according to some embodiments. Also, FIG. 23 is a
diagram illustrating a bottom perspective view of the chair 200,
according to some embodiments, and FIG. 24 is a diagram
illustrating a bottom view of the chair 200, according to some
embodiments.
[0086] As shown in at least FIGS. 20-24, the first armrest 202
including the first armrest support member 202a and the first
armrest pad member 202b is aligned with the first back leg 58,
outside the first front leg 56 and further away from the centerline
80 than the first front leg 56. Also, the second armrest 204
including the second armrest support member 204a and the second
armrest pad member 204b is aligned with the second back leg 62,
outside the second front leg 60 and further away from the
centerline 80 than the second front leg 60.
[0087] FIG. 25 is a diagram illustrating the chair 200 including
the seat 46 that rotates between the down position for sitting on
and the upright position for saving space and storage, indicated in
dashed lines, and the first and second armrests 202 and 204 that
rotate between a down position and an upright position, according
to some embodiments. The second armrest pad member 204b is
rotatably connected to the second armrest support member 204a and
rotates between the down position and at least a partially vertical
upright position, indicated in dashed lines in FIG. 25.
[0088] FIGS. 26 and 27 are diagrams illustrating chairs 250 stacked
and aligned for storage, according to some embodiments described in
the disclosure. In some embodiments, at least one of the chairs 250
is similar to chair 40. In some embodiments, at least one of the
chairs 250 is similar to chair 200.
[0089] FIG. 26 is a diagram illustrating the chairs 250 stacked for
storage, according to some embodiments. The chairs 250 are stacked
one on top of the other with the seats, such as seat 46, in the
down, sitting position. In some embodiments, the chairs 250 have
armrests, such as first and second armrests 202 and 204, and the
armrests are in the upright position for stacking the chairs
250.
[0090] FIG. 27 is a diagram illustrating chairs 250 aligned in a
row for storage, according to some embodiments. The chairs 250 are
aligned one in front of the other with the seats, such as seat 46,
in the upright position. In some embodiments, the chairs 250 have
armrests, such as first and second armrests 202 and 204, and the
armrests are in the upright position for aligning the chairs 250 in
a row.
[0091] FIG. 28 is a flowchart diagram illustrating a method of
building a chair, such as chair 40 and chair 200, according to some
embodiments described in the disclosure.
[0092] At 300, the method includes the step of fastening a first
flex member 96 to a first side member 48 of the chair. In some
embodiments, the method includes fitting an extension portion 96b
of the first flex member 96 into the first side member 48 prior to
fastening the first flex member 96 to the first side member 48. In
some embodiments, the method includes securing the first flex
member 96 to the first leg extension 76 with fasteners, such as
screws or bolts.
[0093] At 302, the method includes the step of fastening a second
flex member 98 to a second side member 52 of the chair. In some
embodiments, the method includes fitting an extension portion of
the second flex member 98 into the second side member 52 prior to
fastening the second flex member 98 to the second side member 52.
In some embodiments, the method includes securing the second flex
member 98 to the second leg extension 78 with fasteners, such as
screws or bolts.
[0094] At 304, the method includes the step of securing the chair
back 42 to the back cross member 94, where securing the chair back
42 to the back cross member 94 couples the chair back 42 to the
first flex member 96 and the second flex member 98. In some
embodiments, securing the chair back 42 to the back cross member 94
includes fitting or inserting a cross member portion 96a of the
first flex member 96 into one end of the back cross member 94 and
inserting a cross member portion of the second flex member 98 into
the other end of the back cross member 94. In some embodiments,
securing the chair back 42 to the back cross member 94 includes
inserting attachment members, such as the attachment member 130a,
through the upper portion 86b of the lower crossbar member 86 of
the chair back frame 82 and the back cross member 94 and the first
and second flex member 96 and 98 before securing the attachment
members to connection blocks, such as connection blocks 106a and
106d. In some embodiments, securing the chair back 42 to the back
cross member 94 includes inserting attachment members, such as the
attachment member 130b, through the upper portion 86b of the lower
crossbar member 86 of the chair back frame 82 and the back cross
member 94 and securing the attachment members to connection blocks,
such as connection blocks 106b and 106c.
[0095] Various modifications and additions can be made to the
exemplary embodiments discussed without departing from the scope of
the present invention. For example, while the embodiments described
above refer to particular features, the scope of this invention
also includes embodiments having different combinations of features
and embodiments that do not include all of the above described
features.
* * * * *