Caging seal for hydraulic elevator or the like

Details Caging seal for hydraulic elevator or the like Caging seal for hydraulic elevator or the like

1982-11-04

1984-10-16

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...

277 58, 277125, 277189, 277205, F16J 1518

Patent

active

044767722

ABSTRACT:
An improvement in a sealing combination for sealing intermediate a cap ring on the hydraulic cylinder or the like and a rod running concentrically therethrough characterized by, in addition to the usual cage assembly on the cylinder assembly, a stuffing box and a wiper ring box for holding respective seals and ring wiper, bearing for maintaining the rod centralized within the central assembly and facilitating longitudinal movement, primary seal disposed about the rod and within the sealing box, a rod wiper disposed about the rod and within the wiper ring box, secondary seal disposed about the rod and intermediate the primary seal and the rod wiper and stop device disposed intermediate the primary seal and the secondary seal and adapted to stop longitudinal movement of the bearing to prevent crushing the second seal. Also disclosed are specific preferred embodiments.

REFERENCES:
patent: 1836776 (1931-12-01), Shimer
patent: 2692584 (1954-10-01), Armington et al.
patent: 3172334 (1965-03-01), Wuellner et al.
patent: 3540741 (1970-11-01), LeFebure

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