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128 Each set of openings 56, 57, and 58 are symmetrically disposed relative to a longitudinal axis of the chassis 12 indicated by phantom line 55.
127 The arms 48 define openings 45, 47, and 50 in distal ends thereof for connecting caster blocks 51 (see FIG. 1) and caster wheels 14 to the chassis 12, as discussed below.
126 The lower chassis 38 and the upper chassis 40 each include a pair of elongated substantially parallel arms 48 that extend from the respective land portions 44 and 46.
125 Objects, features, advantages of the present invention will become apparent from a reading of the following specification, in conjunction with the drawings and the appended claims.
124 Conventional wheelchairs are typically manufactured of metal tubes which are cut to length, bent into shape, and welded together to form a tubular frame that supports a seat and back..
123 As with the embodiment 20 discussed above, in which the seat carriage 22¡¯ may be raised or lowered with a cable 92 to any desired position along the vertical track 26¡¯, the embodiment 20¡¯ using the linear actuator allows the user to stop the seat carriage 22¡¯ at any desired position along the vertical track 26¡¯, from a completely seated position to a full standing position.
122 In this embodiment, back support frame 40¡¯ is adapted to receive and support linear actuator 108.
121 An alternative embodiment 20¡¯ is disclosed in FIGS. 11 through 14.
120 The cable 92 runs over a pulley 94, which may be attached to the top rail 50.
119 A variety of means may be used for raising and lowering the seat carriage 22.

[1] [2] [3] [4] [5] [6] [7] [8] [9] [10] ´ÙÀ½10ÆäÀÌÁö

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