Piston cylinder device with a protective coating and method of p

Details Piston cylinder device with a protective coating and method of p Piston cylinder device with a protective coating and method of p

1992-11-10

1994-09-20

Reese, Randolph A.

Hydraulic and earth engineering

Earth treatment or control

Shoring, bracing, or cave-in prevention

405290, 405288, 4052111, E21D 1552, E02D 560

Patent

active

053484258

ABSTRACT:
A method is described for protecting piston cylinder devices against corrosion by a pressure resistant thermoset or cured material coating. At least the outer and inner cylindrical surfaces, for example, of a mine prop, that cooperate with a sealing device, are coated with a three-dimensionally cross-linked, cured or thermoset material having a sufficient thickness on the one hand for providing the intended protection against corrosion and on the other hand to avoid excessive radially directed elastic deformations of the coating. An additive is included in the coating to improve the dry lubricating characteristics, and thus the cooperation between the coating and the sealing devices. The three-dimensionally interlinked thermoset material fills all surface irregularities so that gas and water pockets, for example, in a mine prop, are avoided.

REFERENCES:
patent: 4415293 (1983-11-01), Engel et al.
patent: 4614461 (1986-09-01), Taniguchi et al.
patent: 4619557 (1986-10-01), Salama et al.
patent: 4640650 (1987-02-01), Koppers et al.
patent: 4892601 (1990-01-01), Norwood
patent: 4921555 (1990-05-01), Skiff
patent: 5049005 (1991-09-01), Lazare et al.
patent: 5051039 (1991-09-01), Heiliger
patent: 5087154 (1992-02-01), Crawford
patent: 5175973 (1993-01-01), Owen et al.

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