Sealing for machine elements which move back and forth

Details Sealing for machine elements which move back and forth Sealing for machine elements which move back and forth

1979-10-19

1981-08-18

Smith, Robert I.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 59, 277 70, F16J 1532

Patent

active

042842808

ABSTRACT:
A sealing for back and forth moving machine elements, particularly for the sealing of rods for hydraulic cylinders, with a seal which seals against the housing as well as against the axially back and forth moving machine part, a preceding protection element which is arranged between the seal and the pressurized chamber of the cylinder, and a stripper, which stripper is turned toward the atmosphere. The preceding protection element is provided with a lip, the lip being directed toward the oil pressurized chamber, which lip touches the back and forth moving piston rod and has openings, which openings produce a connection between the pressurized oil chamber and that oil chamber which is formed between the preceding protection element and the lip seal.

REFERENCES:
patent: 3214182 (1965-10-01), Herbruggen
patent: 3642290 (1972-02-01), Millsap
patent: 3659306 (1972-05-01), Stoltze
patent: 3738665 (1973-06-01), Bilco
patent: 3955859 (1976-05-01), Stella et al.

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