LOCKABLE RECLINING ADJUSTMENT DEVICE TO CONTROL THE TILTING OF THE SEAT FRAME OF A MANUAL WHEELCHAIR
First Claim
1. A reclining adjustment device to control the reclining angle of a tiltable seat frame of a manual wheelchair, the device comprising:
- a stepped shaft for adjusting the reclining angle of the seat frame to a desired angle selectable from a fixed number of angles between a fully reclined position and a fully upright position, the steps on the shaft each defining one of the fixed number of angles;
a slider with three ball bearings positioned equally spaced relative to one another along the stepped shaft for releasably engaging the stepped shaft when the reclining angle of the seat frame is at the desired angle to fix the stepped shaft in place;
a lock cylinder locking the ball bearings to the stepped shaft at the desired angle; and
an actuating mechanism, wherein upon actuation of the actuating mechanism, the ball bearings are released from the stepped shaft to permit the stepped shaft to be adjusted to the desired angle.
1 Assignment
0 Petitions
Accused Products
Abstract
Disclosed is a reclining adjustment device to control the reclining angle of a tiltable seat frame of a manual wheelchair. The device in accordance with the teachings of this invention includes a guiding mechanism for adjusting the reclining angle of the seat frame to a desired angle selectable from a fixed number of angles between a fully reclined position and a fully upright position, an engaging mechanism releasably engaging the guiding mechanism when the reclining angle of the seat frame is at the desired angle to fix the guiding mechanism in place, a locking mechanism for locking the engaging mechanism to the guiding mechanism at the desired angle, an actuating mechanism, wherein upon actuation of the actuating mechanism, the engaging mechanism is released from the guiding mechanism to permit the guiding mechanism to be adjusted to the desired angle. Preferably the guiding mechanism is a stepped shaft, the engaging mechanism is a slider with three ball bearings positioned equally spaced relative to one another along the stepped shaft, and the locking mechanism is a lock cylinder.
26 Citations
19 Claims
-
1. A reclining adjustment device to control the reclining angle of a tiltable seat frame of a manual wheelchair, the device comprising:
-
a stepped shaft for adjusting the reclining angle of the seat frame to a desired angle selectable from a fixed number of angles between a fully reclined position and a fully upright position, the steps on the shaft each defining one of the fixed number of angles; a slider with three ball bearings positioned equally spaced relative to one another along the stepped shaft for releasably engaging the stepped shaft when the reclining angle of the seat frame is at the desired angle to fix the stepped shaft in place; a lock cylinder locking the ball bearings to the stepped shaft at the desired angle; and an actuating mechanism, wherein upon actuation of the actuating mechanism, the ball bearings are released from the stepped shaft to permit the stepped shaft to be adjusted to the desired angle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A reclining adjustment device to control the reclining angle of a tiltable seat frame of a manual wheelchair, the device comprising:
-
a guiding mechanism for adjusting the reclining angle of the seat frame to a desired angle selectable from a fixed number of angles between a fully reclined position and a fully upright position; an engaging mechanism releasably engaging the guiding mechanism when the reclining angle of the seat frame is at the desired angle to fix the guiding mechanism in place; a locking mechanism for locking the engaging mechanism to the guiding mechanism at the desired angle; and an actuating mechanism, wherein upon actuation of the actuating mechanism, the engaging mechanism is released from the guiding mechanism to permit the guiding mechanism to be adjusted to the desired angle. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
-
Specification