Browse Prior Art Database

DOUBLE-FACED SEAL

IP.com Disclosure Number: IPCOM000023116D
Original Publication Date: 1976-Oct-31
Included in the Prior Art Database: 2004-Mar-27
Document File: 2 page(s) / 241K

Publishing Venue

Xerox Disclosure Journal

Abstract

Commercially available clutch and needle bearing units of the "drawn-cup" type with small radial sections do not have in- tegral contact seals. Where contact sealing is necessary, extrinsic lip seals are not satisfactory because they add considerably to the overall length of a unit and introduce higher drag forces on the shaft of the unit.

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XEROX DISCLOSURE JOURNAL

Double-Faced Seal
Raymond C. Kirsch

Proposed
U.S. Cl.
mt. Cl.

Classification
308/36,1

F16c 1/24

Commercially available clutch and needle bearing units of the
"drawn-cup" type with small radial sections do not have in-
tegral contact seals. Where contact sealing is necessary,
extrinsic lip seals are not satisfactory because they add
considerably to the overall length of a unit and introduce
higher drag forces on the shaft of the unit.

The illustrated seal was designed to overcome these problems,
and is very suitable for sealing units where axial space is
limited and low drag is desirable, Figure 1 shows a cross
section of the seal before installation in a unit, and
Figure 2 shows the same cross section after installation in
a unit. As can be seen, the seal has two very thin (approx-
imately 0.010") annular portions, each of which has an
annular wear bead around the outer periphery thereof. When
the seal is installed in a unit as shown in Figure 2, the
seal is under compression, and as a result the wear beads
contact the unit to prevent foreign materials from entering
the unit,

F/Gd

FIG. 2

Volume I Numbers 9/10 September/October 1976

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44 XEROX DISCLOSURE JOURNAL

Volume 1 Numbers 9/10 September/October 1976

[This page contains 1 picture or other non-text object]