ELECTRICALLY DRIVEN TOOL Russian patent published in 2015 - IPC B25D11/06 B25D17/26 B25F5/00 F16H57/27 

FIELD: electricity.

SUBSTANCE: invention relates to electrically driven tools. The electrically driven tool comprises a drive mechanism, enclosed containing space, a channel that ensures interconnection of the containing space and environment, a filtration chamber mounted in the channel, an inner passage in the channel in order to communicate the filtration chamber with the containing space, an outer passage in the channel in order to communicate the filtration chamber with environment, a filter and a choke. The enclosed containing space contains the drive mechanism and lubricant to lubricate the drive mechanism. The filter is placed in the filtration chamber to absorb the lubricant. The filter is spaced at distance from peripheral edge of the outer passage opening, which is open to the filtration chamber so that space is formed from the side of the filtration chamber opening. The choke is mounted in the above space in order to restrict air flow coming to the outer passage through the filter. The choke comprises a plate element overlapped on top of the filter; the element restricts the passage between the filter and the above space. The plate element is formed of circular elastic material. The choking passage is limited by peripheral surface of the plate element and peripheral wall surrounding the outer peripheral surface and ensures interaction of the filter with the above surface.

EFFECT: preventing lubricant leaks and adjusting inner pressure in containing space of the drive mechanism.

3 cl, 5 dwg