Retractable delineator post

Road structure – process – or apparatus – Traffic director – Yielding

Reexamination Certificate

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Reexamination Certificate

active

07377718

ABSTRACT:
An automatic retractable delineator with a housing containing a reciprocating delineator post that reciprocates through an opening in the top surface of the housing. A raising and lowering mechanism is disposed inside the housing and is mechanically coupled to the post. The housing defines an inside cavity that is provided with positive pressure to create a pressure differential between the cavity and the atmosphere. As a result, the housing is substantially protected from the elements as the pressure differential prevents foreign objects and moisture such as dirt, salt, ice, snow or the like from entering the cavity.

REFERENCES:
patent: 3530775 (1970-09-01), Bowersox
patent: 4576508 (1986-03-01), Dickinson
patent: 4595312 (1986-06-01), Corless
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patent: 5425595 (1995-06-01), Roper
patent: 5462384 (1995-10-01), Arlandis
patent: 5466088 (1995-11-01), Nasatka
patent: 5476338 (1995-12-01), Alberts
patent: 5499887 (1996-03-01), Verra
patent: 5560733 (1996-10-01), Dickinson
patent: 6099200 (2000-08-01), Pepe et al.
patent: 6349503 (2002-02-01), Gompertz et al.
patent: 6626606 (2003-09-01), Johnson
patent: 9745328 (1999-06-01), None
patent: 2267923 (1993-12-01), None

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