| US 7,559,162 B2 | ||
| Lip assembly including side portions with projections | ||
| Robert S. Bierwith, 1331 Eastshore Hwy., Berkeley, Calif. 94710 (US) | ||
| Filed on Mar. 29, 2005, as Appl. No. 11/94,337. | ||
| Claims priority of provisional application 60/565233, filed on Apr. 23, 2004. | ||
| Prior Publication US 2005/0241195 A1, Nov. 03, 2005 | ||
| Int. Cl. E02F 3/40 (2006.01) | ||
| U.S. Cl. 37—444 [37/448; 172/701.3] | 12 Claims |
| 1. A lip assembly comprising:
a lip having an upper surface, a lower surface, a front portion, a rear portion, a first side portion, a second side portion,
corners between the front portion and the first and second side portions, and a plurality of holes disposed between the front
portion and the rear portion and extending from the upper surface to the lower surface, wherein the first and second side
portions are on opposite sides of the front portion of the lip, and wherein the front portion, the corners, the first side
portion, and the second side portion include projections and valleys, the first side portion substantially facing the second
side portion;
a plurality of tooth assemblies extending away from at least the front portion of the lip and respectively coupled to the
lip via the plurality of holes;
a first plurality of lip shrouds consecutively located and coupled to projections on the first side portion and the corner
between the first side portion and the front portion; and
a second plurality of lip shrouds consecutively located and coupled to projections on the second side portion and the corner
between the second side portion and the front portion,
wherein the first plurality of lip shrouds and the second plurality of lip shrouds from an excavating surface at the corners
and at the first and second side portions;
wherein the corners between the front portion and the first and second side portions are curved.
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