Anti-scaling device

Details Anti-scaling device Anti-scaling device

2006-04-25

2006-04-25

Stodola, Daniel P. (Department: 3679)

Fences

Top guarded

Unstable

C256S003000, C256S011000

Reexamination Certificate

active

07032889

ABSTRACT:
An anti-scaling device comprises a hollow central body for mounting on a bar and several spike units extending outwardly from the body in different directions. Pairs of spike units are rotatably and preferably detachably mounted on opposite sides of the central body. The device may further comprise serrated webs extending outwardly from the central body between the spike units. The device may also comprise rows of sharp-edged teeth axially aligned along the central body. Alternatively, the spike units may be partially rotatable serrated propellers or may be pivotably rotatably mounted. The device may be moulded from plastic material.

REFERENCES:
patent: 435708 (1890-09-01), Poole
patent: 4739970 (1988-04-01), Francis
patent: 4815896 (1989-03-01), Fox et al.
patent: 8624656 (1987-01-01), None
patent: 0242092 (1987-10-01), None
patent: 2076038 (1981-11-01), None
patent: 2225598 (1990-06-01), None
patent: 2234273 (1991-01-01), None
patent: 2290565 (1996-01-01), None

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