Appeal No. 2006-0004 Παγε 7
Application No. 09/497,359
device which is relatively simple in construction, which is easy to control, and which
provides uniform lifting force at the respective four corner portions thereof so that the
platform will be maintained substantially horizontal when being elevated. Rodosta
teaches (column 2, lines 8-30) that:
Referring to the drawings, 11 generally designates an improved
power-operated automobile lift assembly constructed in accordance with the
present invention. The assembly 11 comprises four hollow corner posts 12, 13,
14 and 15 which are rigidly-fixed to the floor, for example, by the provision of
base flanges 16 on the posts through which anchoring bolts 17 may be engaged
so as to rigidly-secure the posts in upstanding vertical positions . The posts are
shown as being square in cross-section, but obviously, may have any other
desired cross-sectional shape. Posts 12, 13, 14 and 15 are arranged to define a
substantially rectangular enclosure with the posts 12 and 13 and the posts 14
and 15 at the opposite end thereof. The posts 14 and 12 are rigidly-connected at
their top ends by a longitudinal tie rod 18 and posts 15 and 13 are similarly
rigidly-connected at their top ends by another longitudinal tie rod 19. The top
ends of the end posts 12 and 13 are rigidly-connected by a transverse tie rod 20.
The transverse tie rod 20 comprises a hollow tube having a shaft 21 axially
secured therein, as by the provision of bearing collars 22 and 23 in the opposite
end portions of the tubular tie rod 20, as shown in FIGURE 3.
In the rejection before us in this appeal, the examiner determined (answer, p. 3)
that:
It would have been obvious to one having ordinary skill in the static
structure art at the time the invention was made to have positioned a
compression member between the pair of rigid structures of Miller's elevator
system [i.e., Miller's beams 52 and 64] as taught by Rodosta to prevent the rigid
structures from bending due to non-vertical load.
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