US 2014/0190719 A1Published application

Double-valve mechanism

AssigneeHyphone Machine Industry Co., Ltd.

InventorsChih-Ming TING, Tien LIN, Po-Jen LAI

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Abstract

A double-valve mechanism and a pneumatic tool including the same are provided. The double-valve mechanism is mounted in a main body of the pneumatic tool. The main body has an exhausting passage and an outlet passage communicating therewith, and an entrance passage and an inlet passage communicating therewith. The double-valve mechanism is operable from outside of the main body to move relative to the main body so as to selectively seal an entry of the inlet passage and an exit of the outlet passage. Whereby, the stop of the tool is effectively ensured after the double-valve mechanism is closed, no gas leakage will occurs, the waste of pressurized air energy and defects of the tool will be avoided, and the rotation of the rotor can be quickly stopped.

Claims15

Dependent claims

A double-valve mechanism, adapted to mount in a main body of a pneumatic tool, the main body including an exhaust passage, an outlet passage, an entrance passage and an inlet passage, the exhaust passage adapted for exhausting air outside, the outlet passage and the exhaust passage being communicated, the entrance passage and the inlet passage being communicated, an entrance control vale of the double-valve mechanism being located between the entrance and inlet passages, an exhaust control vale of the double-valve mechanism being located between the outlet and exhaust passages, the double-valve mechanism being operable from outside of the main body to move the entrance and exhaust control vales in a single operation, the double-valve mechanism being movable relative to the main body so as to selectively seal an entry of the inlet passage via the entrance control vale and seal an exit of the outlet passage via the exhaust control vale so that the inlet and outlet passages are pneumatically uncommunicated with the entrance and exhaust passages respectively.

Dependencies are inferred from the claim text.