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US 4,232,518 AGranted
Sealed type fluid reservoir
AssigneeAisin Seiki Kabushiki Kaisha
InventorsMitsuyuki Suzuki, Atsushi Ohmi
Life of this patent
Estimating the term…
Abstract
A sealed type fluid reservoir in which a valve member is incorporated in a main cap which is coupled with an upper end of a casing. The pressure in the interior of the casing is maintained at atmospheric level by the valve member despite pressure variation in the interior of the casing.
Claims2
A sealed type fluid reservoir mounted on a brake master cylinder comprising:
- a casing which comprises transparent plastic material;
- a main cap which comprises a rubber material disposed on the casing and which includes an upper portion extending therefrom having a comparatively thin portion, said thin portion of said upper portion of the cap including a slit formed therein;
- a secondary cap mounted on the main cap;
- a plurality of projections formed on the secondary cap;
- air passage means formed between the secondary cap and said main cap by said projection;
- groove means formed on said secondary cap for communicating said air passage means to atmospheric air, said casing including a brake fluid containing interior;
- and
- a chamber formed between said thin portion and said main cap in open communication with the casing interior, said slit of said thin portion comprising a radial slit such that said thin portion comprises a normally closed valve member for controlling flow of air from said air passage means to said casing interior and vice versa when differential pressure therebetween exceeds a set limit.
5 more elements
Dependencies are inferred from the claim text.