Dual lip rod wiping seal

Details Dual lip rod wiping seal Dual lip rod wiping seal

1976-06-04

1977-11-29

Maslousky, Paul E.

Expansible chamber devices

With guide or seal on cylinder end portion for piston or...

Non-metallic seal means between piston or member and end...

277186, 277205, F16J 1518

Patent

active

040600238

ABSTRACT:
A one-piece piston rod wiping seal member for cleaning reciprocating piston rods or plungers as the rod moves into the cylinder chamber for cleaning dust and other foreign matter from the surface of the rod to prevent the foreign matter from entering the working chamber and contaminating the interior thereof. The wiping seal member is of one-piece construction and includes an endless body portion of elastomeric material with a pair of lips projecting axially and radially with respect to an end wall of the body member. One of the lips is a rod engaging lip and projects radially inwardly to engage the surface of a piston rod. The other lip is a cylinder end cap engaging the lip for engaging the end cap of the cylinder. The body portion can be snap fitted into a groove in the end cap of the cylinder. When installed, clearances are provided between the surfaces of the mounting groove of the end cap and the surface of the body portion of the seal member to prevent over stressing of the wiping lips upon lateral movement of the piston rod.

REFERENCES:
patent: 2913269 (1959-11-01), Bremer et al.
patent: 3007723 (1961-11-01), Clarke
patent: 3310230 (1967-03-01), Wirth
patent: 3841204 (1974-10-01), Bennett et al.
patent: 3955479 (1976-05-01), McLuckie

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