Brakes – Internal-resistance motion retarder – Including seal or guide
Patent
1979-11-20
1982-12-21
Kazenske, E. R.
Brakes
Internal-resistance motion retarder
Including seal or guide
267 8R, F16F 936
Patent
active
043644570
ABSTRACT:
A piston-cylinder unit including a cylinder assembly, a guide and seal assembly at one end of the cylinder assembly and a piston rod assembly axially movable relative to said cylinder assembly through the guide and seal assembly is formed with a cap assembly having an annular bottom, which is essentially normal to the axis of the unit, and a jacket with the piston rod assembly extending through the annular bottom and with the annular bottom being located adjacent the guide and seal assembly on a side thereof facing away from a hollow space defined within the cylinder assembly. The jacket bears against the outer circumferential surface of the cylinder assembly, and a tubular body which is elastically compressible in the axial direction is arranged on the outer portion of the piston rod assembly, with the tubular body being fastened in the axial direction on a fastening point of the piston rod assembly at a portion facing away from the cap assembly. The tubular body defines around a piston rod of the piston rod assembly an annular chamber which is open toward the cap assembly. A closing device on the cap assembly closes the annular chamber when the piston rod approaches its inner end position, and passages on the cap assembly connect the annular chamber with the atmosphere when that end of the tubular body facing toward the cap assembly has contact with the closing device. The invention is particularly structured with the closing device formed by an end face of the annular bottom which faces away from the guide and seal assembly and with the passages integrated in the cap.
REFERENCES:
patent: 3096897 (1963-07-01), Hansen
patent: 3661236 (1972-05-01), Wossner
patent: 3830347 (1974-08-01), Fader et al.
patent: 4235426 (1980-11-01), Sullivan et al.
Handke Gunther
Wossner Felix
Fichtel & Sachs A.G.
Kazenske E. R.
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