Dipstick with pressure relief valve
AssigneeEstan Manufacturing Company
InventorsWalter E. Haines, Mason E. Richardson
Life of this patent
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Abstract
A dipstick assembly including a pressure relief valve comprising a handle member having a passageway extending therethrough between the ends thereof, a measuring blade connected to the handle member, a sealing device for perfecting a seal between the dipstick assembly and an access tube adapted to receive the assembly and a valve located within the passageway of the handle member for maintaining a predetermined pressure within a vessel to which the access tube is connected.
Claims12
A dipstick assembly for measuring the fluid level within a sealed chamber, such as a vehicle transaxle, wherein the dipstick is removably received within an access tube, said dipstick assembly comprising:
- a handle member having a passageway extending therethrough between the ends thereof for establishing communication between the interior and exterior of the access tube,
- a measuring blade connected to said handle member,
- sealing means supported by said handle member for perfecting a seal between said assembly and the interior of the access tube when said dipstick assembly is inserted therein, and
- one-way check valve means located within said passageway of said handle member for automatically releasing pressure within the chamber when the pressure exceeds a predetermined maximum.
Dependencies are inferred from the claim text.