Multi-purpose spade

Details Multi-purpose spade Multi-purpose spade

2009-06-05

2011-11-22

Kramer, Dean (Department: 3652)

Handling: hand and hoist-line implements

Hand forks and shovels

Convertible and combined

C294S049000, C294S056000, C294S059000

Reexamination Certificate

active

08061745

ABSTRACT:
A multi-purpose spade includes a central plate, first and second edge plates, and a retreating crescent blade. The central plate is generally concave. The retreating crescent blade is formed along the tip portions of the central plate and the first and second plates. The inner edge portions of the first and second plates are connected to corresponding side portions of the central plate with a predetermined angle so as to form two crest portions on the front surfaces along the side portions of the central plate. The multi-purpose spade may further comprise an extending blade configured to be connected to the retreating crescent blade.

REFERENCES:
patent: 348161 (1886-08-01), Gregg
patent: 366099 (1887-07-01), Hinchman
patent: 421117 (1890-02-01), Voltz
patent: 808168 (1905-12-01), Reed
patent: 809840 (1906-01-01), Peisker
patent: 1209248 (1916-12-01), Beall
patent: 1437199 (1922-11-01), Same
patent: 1571818 (1926-02-01), Ternan et al.
patent: 4655494 (1987-04-01), Eads et al.
patent: 5529130 (1996-06-01), Suk

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