Cylinder piston unit

Details Cylinder piston unit Cylinder piston unit

1980-04-10

1984-01-10

Hershkovitz, Abraham

Expansible chamber devices

Collapsible chamber wall portion

Wall portion formed of flexible material

92 865, 92153, F01B 1900

Patent

active

044247397

ABSTRACT:
Apparatus including an elastomeric hose arranged alternately to stretch longitudinally and then contract in operation of the apparatus, and a contact member disposed so as to be in sliding contact with a surface of the hose during said stretching and/or during said contraction of the hose, a lubricant being supplied between the contact member and the hose to lubricate said sliding contact, wherein the improvement comprises said hose having a longitudinal region which is so clamped or is so disposed that it undergoes little or no stretching and contraction in operation of the apparatus, an axially extending annular gap being disposed between the said contact member and the hose at said longitudinal region, the lubricant being fed to said gap.

REFERENCES:
patent: 2027979 (1936-01-01), Hopkins
patent: 2191861 (1940-02-01), Rymal
patent: 3212447 (1965-10-01), Browne
patent: 3902404 (1975-09-01), Breit
patent: 4384510 (1983-05-01), Frey

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