Water supply device for divers
AssigneeAkira Yamaike
InventorJiunn Liang Chen
Life of this patent
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Abstract
A water supply device for divers includes a cylinder connected to a mouthpiece and a piston member is movably received in the cylinder so that when the piston member is moved by pushing a push rod connected to the piston member, water in the cylinder flows out from the cylinder and enters into the mouthpiece. The piston member has a central passage defined longitudinally therethrough and has a threaded portion defined in a periphery defining the central passage. The push rod extends through the central passage of the piston member and has a threaded section engaged with the threaded portion of the piston member. The push rod is disengaged from the threaded portion of the piston member and received in the cylinder when the push rod is not in use.
Claims5
A water supply device comprising:
- a cylinder connected to a mouthpiece which has a passage defined therein and the passage communicates with an interior of said cylinder, said cylinder having a closed end and an open end through which a spring is received, an inlet defined radially through said cylinder and a pipe engaged with said inlet, a bladder connected to said pipe;
- a piston member received in said cylinder and having a central passage defined longitudinally therethrough, said piston member engaged with an inner periphery of said passage and having a threaded portion defined in a periphery defining said central passage, said spring biased between said piston member and said closed end of said cylinder, and
- a push rod extending through said central passage of said piston member and having a threaded section defined in an outer periphery of said push rod, said threaded section engaged with said threaded portion of said piston member.
Dependencies are inferred from the claim text.