Referring now to Fig. 1, a seated occupant 8 is shown using the
swing seat and kneeling cushions of the present invention which
comprises upper seat cloth top 30 Fig. 3 and lower base 52 Fig.5.
He kneels into the lower cushion as indicated by the dot-dashed
line below the base frame in Fig. 1. The cross section of these
cushions are seen in Fig. 5. The upper seat is called a swing
seat and forms an upper wedge shape and shifts some of the weight
of the occupant from directly beneath the buttocks to behind the
upper leg and the rest of the body weight to the front of the
lower leg knees and shins to front portion of the lower cushion
rests on the curved frame 21 supporting most of the weight of the
occupant and when properly positioned extends from below the
occupant's knee across substantially the entire length of the
lower leg or shin. The higher the angularity of the upper seat
with the lower cushion positions the occupant so that the forces
of gravity are distributed more to the knees-ankles thereby
relieving oppressive forces against the spine and rear.
Fig. 1 shows the quick release strap attached to the top and bottom layers of the swing seat by button - snaps through the webbing strap 12 in all Figs. except Fig.2. The attaching snaps are seen in Fig. 1 but labelled 60 and better seen in Figs. 5 & 6. The seat is attached to the upper section of the wing rail 13 in Figs. 1 & 6 which consists of a few inches of Velcro latch. Velcro hook is attached to the bottom left side inside of the swing seat as also indicated in Figs. 1 & 6 by 14. The Vecro hook also connects to the Velcro latch on top of the wing rails best seen by the left 10 in Fig. 6. A strip of adhesive back Velcro latch 10 surrounds all the cut surfaces, except the bottom base rectangle, as seen in all Figs. except 5. This gives a nice appearance and an added texture trim.
In Fig. 7, the semipermanent wing rail seat is held by two strips of hook Velcro on a block of wood (72). The cloth latch Velcro (71) is attached to the top and bottom layers (30 & 52) of the swing seat. Here, each layer is inserted through the slot (70) on the left wing rail (15) and wraps around the block, bottom to bottom, top to top and pressed on the adhesive back hook Velcro on the wooden block on the inside of the wing rail under the swing seat. The concept here is that the weight pull through the slot pulls the block tightly against the wing rail (15) and pinches these end pieces of the swing seat. The heavier the body, the more the pull of cloth against the wing rail, the more friction against the cloth by pressure, hence with more friction and the cloth will not slide out back through the slot. Less pressure with lighter body weight but less body weight pulling the cloth through the slots so there is no slip. So the cloth's ability to rip off from the Velcro block is independent of the body weight. Also, we have 4 more right angle turns for each top and bottom cloth layer that greatly diminishes the pull on the block as compared to the normal quick release seat. The attachment of the right side of the wing rail is by means of the continuous double cloth and seams of the swing seat's top & bottom (30 & 52 Fig. 5), down the side of the right wing rail (26 in Fig .2) through the slot (29) there and encases (36) a wooden dowel (33) as seen in Figs. 3,4 & 5. The concept of Fig. 7 is similar to this except we don't need Velcro to join the 2 pieces since it's continuous and we have a round dowel here instead of a rectangular block to wrap the Velcro around. Note the quick release handle and the semipermanent is on the left side but can be switched to the right side by also switching the left and right wing rails 15 - 25 for the quick release but type 25 wing rail (slot 70 = 29) and no Velcro for both left & right for semipermanent seat.
The knee contoured support frame 21 is important because the weight is spread across the entire shin from the knee to instep in front of the ankle rather than at a few pressure points along the shin which could be painful. The frame is composed of flexible plywood of at least 1/2" thick as seen by the double dotted line in Figs. 1,2,3,6. In Fig. 4, the bottom or floor (21) is seen and Fig. 5 shows the cutaway rear supporting the kneeling cushion (55-57) above it. Fig. 5 shows how this curved frame is supported. On the left and right side (23 & 27), it is embedded into a supporting groove and reinforced in the center by another contoured frame seeing it's rear portion (43) with 2 screws and covering caps attaching 43 to the rear panel base frame (50 but invisible here). The rest of the center support is seen in Figs. 2 & 4, 42-43. In Fig. 4, the smaller dashed line is the bottom and attached to the front above the pulling handle (42) by 1 screw and covering cap connecting to the front base panel (34) and seen better in Fig. 3. Adjacent to each of the center floor support 42-43, there are front (44) and rear (45) blocks attached to the inside of their front and rear corresponding panels (34 & 50) as seen in Figs. 3-5.
Referring now to Fig. 5, an important aspect of the present invention is the utilization of multiple layers of the kneeling cushioning materials of different densities, shown in phantom in this figure as elements 55-57 additional, yet minute cushioning is provided by the base 21 explained above because it comprises 1/2" of flexible plywood layers suspended on a frame. The preferred embodiment includes a top layer 56 of microcell 2 lb/ft3 or neoprene rubber. The rest of the cushion comprises 5-7 layers of 1/4" thickness of firm small air bubble foam roll. This air bubble foam 57 is less dense. The purpose here is to have the top layer somewhat firm but not too soft that pushes against the front of the knee caps which could hurt later when standing if kneeling too long on the cushion. However, because of the much thicker accumulation of these layers, the whole leg sinks into the medium and feels and behaves like softness on the shin and knee with much of the body weight but no knee cap pressure. Thus, the microcell is slightly denser but more rigid and prevents the knee cap from sinking to far without hurting the thin skin covering the occupant's knees. More kneeling comfort is achieved by enclosing these layers with a 10 oz duck cloth canvas. This material acts as a strong non-stretch, non-skid medium (55). This compressibility provides a unique comfort and support to the knees and at every point along the occupants shins due the contoured kneeling pad. The encasement of the kneelig pad layers and snaps on only one side gives one access to these layers. In Fig. 5, the kneeling pad would be hidden except we pretended the rear base panel (50) is transparent except for the bottom, where it attaches to the sides (23 & 27) and the very top corners shown by the small horizontal line just below the 23 & 27 label that extends into the upper part of the kneeling pad but below the top. This is because the feet dangle over the rear panel Fig. 1, 50 Fig. 5, a Velcro trim (10) on top of the panel, not shown here but elsewhere because of the complexity in this area shown, the top layers and cover of the kneeling pad is extended to over top of the back panel 50 to keep the corners of the panel from cutting into the feet. This level down to 21 indicated by element 63 on both left and right in Fig. 5, represents the rear portion, corners only, of the cradle housing the kneeling pad. In reality, these 2 short lines continue and meet, then this whole rear cradle is visible, kneeling pad invisible, and a larger element 63 across the whole back top of the rear panel 50 appears.
The two sides of the kneeling cradle are indicated by 54 in Figs. 2,5 & 6. The front of the kneeling cradle by 62 Fig. 3. The effect of this kneeling is to keep the kneeling pad from sliding laterally and forward because of the tilt. The choice of 10 oz duck cloth strong non-stretch, non-skid canvas was also used for the swing seat as noted by the top and bottom layers (30 & 52) in Figs. 3 & 5. The microcell (53) is also used as the cushioning layer, as in 56 of the kneeling pad, for added comfort in the swing seat but of different dimension. This is added because of the different radii of curvature for the top and bottom layer as explained in 2. Swing Seat above under Construction. If the swing seat stretches, the occupant may be sitting on the back of his legs for a low angle kneel. This is why the thinnest material with support was chosen to be a cloth swing seat rather than a thicker rigid medium that would cut into the back of the thighs. To adjust the sitting angle, move the wing rail bumper stop (32) by moving the bolt (18) both in Figs. 1-6, up or down within the rear base frame slot (19) as seen in Figs. 1,6.
Notice, that in Fig. 6, the assembly was raised from Fig. 1. The wing nuts for loosening the assembly is indicated by 41 in Figs. 4 & 5 in conjunction with wing bolt 18. The bumper stop (32) is actually a short pipe conduit covered by strip Velcro hook (not shown) to act as a bumper and protect the Velcro latch on the bottom of the wing rail (10) in Figs. 1,2 & 6. Also, it aids in preventing the wing rail from sliding forward when seated due to the hook-latch adherance of the Velcro. This can also be used as a safety feature when transportating the Kneel Kush when carrying it with the handle (24) Figs. 1-4 for the Home Version (non-wheels). Not shown are the friction or external tooth lock washers between bumper stop (32) and the side base frames 23 & 27 in Figs. 4,5 along the slot inside the base frame 19 in Fig. 1. The outside dotted line denotes where the washers cling to the inside of the base against the wing nuts 41 Figs. 4 & 5. Same setup for slot 17 Fig 1. also. A flat metal washer on the outside base frame of slots 19 or better seen between 32 and 23 & 27 Fig. 5, allows the bumper stop (32) to be tightened against the frame without the pipe walls burrowing into it by distributing the force against the entire face of this washer. All these washer types are needed since this bumper and knurled head thumb screw 16 bolt support much of the body weight, more at a lower seating angle. The friction or external tooth lock washers are also not displayed there at 16 Fig. 1,4,5 also.
To adust the leg's thickness, knobs 16 and wing bolt 18 must be raised or lowered along slots 17 & 19 in conjunction with one another as best seen in Figs. 1,2 & 6. Knurled head thumb screw 16 moves vertically along slot in the base frame sides 17 in Figs. 1,5 & 6. For leg length adjustments, knob-bolt 16 moves along slot 11 cut in both wing rails (15 & 25) in Figs. 1,2,5,6. This allows the occupant to determine how much of the swing seat he wants for his buttocks. A secondary minor adjustment can also be made here by sliding the swing seat section 26 forward or backwards along the upper wing rail slot 29 Fig. 2 in conjunction with section 14 along 13 in Figs. 1,6 or the rectangular block along slot 70 Fig. 7.
The wing rails and base frame is constructed of 3/4" thermofused laminated particle board. The 4 base panels are connected by 2 screws in each corner joint with caps in Figs. 1,2,6 but labelled in Fig. 2 by 28. The panels are joined even more strongly by the use of the wheel (22 in Figs. 1,3,4,5) brackets (40 in Figs. 4,5). The screw holes (58 Fig. 5) are on the inside of the 4 panels joining the 4 corners. We doubled the brackets in order to strengthen the 4 leg levelers (20) in the corners. The leg levelers can move the whole Kneel Kush up or down a few inches without the wheels. This would be a Home Version of the Kneel Kush, instead of the Office Version wheels, for thick rugs or an uneven surface like a recreational room, patio or basement where we may have an irregular surface. Here, we would have a level kneeling base or we could reduce or increase the kneeling angle. The Office Version would have the wheels replacing the double brackets in the 4 corners. They are attached by the 3/4" U-clip and screw holes (35) in Figs. 3,5 but would be shifted to the corners for more stability with the leg levelers gone. The wheels will aid in pulling the Kneel Kush up to a desk, but getting into and out of the Kneel Kush could cause some unpreferred roll. To correct this, two of the wheels need brakes. While in the Kneel Kush, the rear wheels can not be reached but the front ones can when the occupant leans forward. So the brakes levers (46) are shown attached to the wheels in Figs. 3,4 & 6. With the pull handle (24) in Figs. 1-4, one call pull the Kneel Kush fom room to room by attaching a Velcro strap webbing kitty leash (not shown).