Dynamic seating components for wheelchairs
A wheelchair includes a pivotable mechanism. The pivotable mechanism allows for a pivoting movement about an axis defined by an interface between adjacent components. These components may be (a) a seat member and a back member, (b) a seat member and a footrest, (c) a foot rest and a footplate support, (d) a baseplate and a footplate, or (e) a back member and a headrest.
1. A mobile seating device comprising:
a seat frame defining a receiver; and
a pivotable leg connection secured to the seat frame, the pivotable leg connection comprising:
a connection element configured to be received in the receiver;
a pin;
two side plates rigidly connected to the connection element, wherein at least one of the two side plates comprises a curved outer edge and defines a plurality of openings, wherein at least one of the plurality of openings is disposed proximate the curved outer edge and is configured to receive the pin;
an axle disposed between the two side plates;
a hub disposed about the axle and between the two side plates, wherein the hub is pivotable relative to the axle; and
an upper housing secured to the hub, wherein a pivotal movement of the hub causes a corresponding pivotal movement of the upper housing.
2. The mobile seating device of claim 1 , wherein the pin is configured to limit a range of rotation of the axle.
3. The mobile seating device of claim 1 , wherein the pin is configured to prevent a rotation of the axle.
4. The mobile seating device of claim 1 , wherein the pin is configured to limit a range of rotation of the upper housing.
5. The mobile seating device of claim 1 , wherein the pin is configured to prevent a rotation of the upper housing.
6. The mobile seating device of claim 1 , wherein the pin extends from a side of the hub proximate a first plate of the two side plates to a side of the hub proximate a second plate of the two side plates.
7. The mobile seating device of claim 1 , wherein the pin is configured to set an initial position of the upper housing.
8. The mobile seating device of claim 7 , wherein the upper housing is configured to pivot from the initial position.
9. The mobile seating device of claim 1 , further comprising the pin.
10. The mobile seating device of claim 1 , further comprising a biasing element disposed between the axle and the hub.
11. The mobile seating device of claim 10 , wherein the biasing element comprises a plurality of biasing elements.
12. The mobile seating device of claim 1 , wherein the opening comprises a curved perimeter.
13. The mobile seating device of claim 12 , wherein the opening is round.
14. The mobile seating device of claim 1 , wherein the connection element is axially aligned with the receiver.
15. The mobile seating device of claim 1 , wherein the upper housing is disposed at an initial angle to the connection element.
16. The mobile seating device of claim 1 , wherein the pin is fixed during a pivotal movement of the upper housing.
17. The mobile seating device of claim 1 , further comprising a lower housing slidably engaged with the upper housing.
18. The mobile seating device of claim 17 , wherein the lower housing is axially rotatably engaged with the upper housing.
19. The mobile seating device of claim 17 , wherein the lower housing is at least partially disposed in the upper housing.
20. The mobile seating device of claim 1 , wherein the connection element is substantially cylindrical.