Walk-behind trenching machine

Excavating – Ditcher – Having endless digger

Reexamination Certificate

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Reexamination Certificate

active

07805864

ABSTRACT:
A walk-behind trenching vehicle incorporating a trenching boom with an endless trenching chain. The trenching boom may be connected to a forward end of the vehicle via a pivot joint that is offset from a drive axis of the trenching chain. The boom may be movable between an operating position and a transport position via a single actuator, e.g., hydraulic cylinder.

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“All Hydraulic Mini Heavy Duty Trencher,” Models 912HM and 912RM. Barreto Manufacturing, Inc. [Online]. [retrieved on May 22, 2007]. Retrieved from the Internet: <URL:http://www.barretomfg.com/mini-heavy-duty-trencher.php>; 1 pg.
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“Document 1,” 8 pictures of a trenching machine taken at Northwest Rental Conference trade show, Pasco, WA, Nov. 5-7, 2007; 6 pgs.
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Product Brochure for “Zero Turning Radius Steerable Walk-Behind Trencher,” Models: Barreto 1324ST/1624ST, Barreto Manufacturing, Inc.; 2 pgs. Product believed to be introduced at least as early as Feb. 9, 2007.
Product Brochure for “Barreto 912 Self-Propelled Trencher,” Barreto Manufacturing, Inc.; 2 pgs. Product believed to be introduced at least as early as Feb. 2005.
“Kid Trencher (2 series Photos),” [online]. May 10, 2007 [retrieved on Apr. 24, 2008]. Kanga Loaders UK Ltd., Retrieved from the Internet:<URL:http:www.kangaloader.co.uk/photodetails.asp?category=2%20Series%20Photos&PhotoID=37>; 1 pg.
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“2 Series Photo #1 (2 series Photos),” [online]. Apr. 30, 2007[retrieved on Apr. 24, 2008]. Kanga Loaders UK Ltd., Retrieved from the Internet:<URL:http:www.kangaloader.co.uk/photodetails.asp?category=2%20Series%20Photos&PhotoID=20>; 1 pg.
U.S. Appl. No. 11/900,394, filed Sep. 11, 2007, Azure et al.

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