Road structure – process – or apparatus – Drain or gutter
Reexamination Certificate
2005-09-01
2009-12-29
Will, Thomas B (Department: 3671)
Road structure, process, or apparatus
Drain or gutter
C403S348000, C404S004000
Reexamination Certificate
active
07637687
ABSTRACT:
The invention relates to a tree grille system for covering tree grates. Said system consists of grille sections (1), which are interconnected by couplings (7) to form a self-supporting tree grille. The couplings (7) consist of two fixed coupling parts (8) configured on the grille sections (1) and a coupling part (9) that can be inserted between the other parts and then rotated into a locking position. An arc-shaped rib (18) is configured on the underside of the fixed coupling parts (8), the outer peripheral face (21) of said rib being configured as a ramp-type clamping surface (23). One section of said surface (23) is provided with undulating fluting (24). When the displaceable coupling part (9) is rotated into the locking position, teeth (34) that are formed on said part slide over the fluting (24), causing the displaceable coupling part (9) to be locked by a friction and positive fit in the locking position. Inserts (40), which can be introduced into two receiving holes (35) of the displaceable coupling part (9), comprise a pin (41) that projects outwards and engages in one of several arched bores (42) of the fixed coupling parts (8). This permits a more secure, positive-fit locking position to be achieved for the displaceable coupling part (9).
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Cahn & Samuels LLP
F. Von Langsdorff Licensing Ltd.
Risic Abigail A
Will Thomas B
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