Sealing and replenishment gasket

Details Sealing and replenishment gasket Sealing and replenishment gasket

2007-04-03

2007-04-03

Pickard, Alison K. (Department: 3673)

Seal for a joint or juncture

Seal between relatively movable parts

Piston ring or piston ring expander or seat therefor

C277S439000, C277S567000, C277S928000, C277S560000

Reexamination Certificate

active

10806462

ABSTRACT:
The annular sealing cup with axis Δ, a so-called replenishment cup, which is intended to be positioned between a hydraulic cylinder and piston and which has a <<U>> axial section and has application to braking circuits comprises:a static branch (10) defining a static sealing annular lip,a dynamic branch (12) defining a dynamic sealing annular lip,and a core (14) connecting the static (10) and dynamic (12) branches and defining a annular bead (15) opposite the lips.According to the invention, the cup is characterized in that the connecting surface (24) between the static branch (10) and the core (14), located opposite the bead (15), has a concave shape corresponding to a local reduction in the thicknesses of the static branch (10) and of the core (14) at the connecting region between the static lip and the core (14), so as to define a rotation area (21).

REFERENCES:
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patent: 5575484 (1996-11-01), Burke
patent: 6877633 (2005-04-01), Niese
patent: 343194 (1960-01-01), None

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