Waterproof/dustproof structure

Details Waterproof/dustproof structure Waterproof/dustproof structure

2008-01-15

2008-01-15

Lee, K. Richard (Department: 2832)

Electricity: circuit makers and breakers

Electric switch details

Cases and bases

Reexamination Certificate

active

07319201

ABSTRACT:
A simple, inexpensive waterproof/dustproof structure for a movable mechanism such as a machine tool apparatus or the like, providing a liquid reservoir formed between the inner wall of a stationary member and the outer wall of a movable member at a portion equivalent to the entrance of a gap between the stationary member and the movable member. The leading edge of the movable member moves through a liquid LQ that fills the liquid reservoir. The liquid LQ seals off the interior of the apparatus from the exterior to prevent the entry of mist, dust and other foreign matter. The gap may be made comparatively broad without affecting the ability to prevent the entry of foreign matter. The direction of movement of the movable member may be longitudinal, lateral, reciprocal, rotary, or a combination thereof, depending on the type of movable mechanism to which the waterproof/dustproof structure is applied. The liquid LQ may be a working fluid used by a hydraulic bearing or a machining fluid used by a machine tool.

REFERENCES:
patent: 2366911 (1945-01-01), Laird
patent: 3167894 (1965-02-01), Seidel
patent: 3434706 (1969-03-01), Roder
patent: 5471022 (1995-11-01), Kiss et al.
patent: 5575380 (1996-11-01), Imai
patent: 5959271 (1999-09-01), Matsuhashi
patent: 1131402 (1996-09-01), None
patent: 1 652 083 (1967-10-01), None
patent: 2004-286109 (2004-10-01), None
European Search Report in corresponding Patent Application No. 06251203.3-2302.
Chinese Patent Office Action, mailed Jul. 7, 2007 and issued in corresponding Chinese Patent Application No. 2006100659090.

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