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Bleeding protective casing assembly for bearing system

  • US 3,937,494 A
  • Filed: 09/13/1973
  • Issued: 02/10/1976
  • Est. Priority Date: 09/13/1973
  • Status: Expired due to Term
First Claim
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1. A longitudinally expansible casing assembly for shielding internal operative members from the entrance of external dirt comprising:

  • outer wall means forming a vertically oriented annular chamber surrounding the operative members and subject to gradual leakage of liquid thereinto, said outer wall means including an annular cup-shaped case having a generally cylindrical outer sidewall and an open top, andan annular cap covering the open top of the case, including a downwardly depending sidewall disposed concentrically outwardly of the case sidewall in longitudinally expansible telescoping relation therewith, and check valve means for allowing liquid to bleed downwardly out of the chamber.

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