DRIVE TOOL Russian patent published in 2013 - IPC B25F5/00 F16K24/00 

FIELD: process engineering.

SUBSTANCE: drive tool comprises oil container and container cap. Proposed cap comprises body and valve element. Cap body comprises connection channel communicating tank inner part with its outer part. Valve element is secured to cap body to cover said connection channel. Valve element has leaf part, elastic part and extending part. Elastic part has central section to be elastically deformed toward valve element inner and outer surfaces relative to elastic part peripheral section. Inner surface tales up the tank inner pressure while outer surface takes up the tank outside pressure. Extending part extends from elastic part and has a slot on its top section. Elastic part and extending parts can be deformed toward inner surface to open said extending part slot when tank outside pressure exceeds its inner pressure. Elastic part and extending parts can be deformed toward outer surface to open said extending part slot when tank inside pressure exceeds its outer pressure.

EFFECT: simplified design of drive tool valve.

5 cl, 9 dwg