Fastener driver

A fastener driver includes: a cylinder; a movable piston positioned within the cylinder; and a drive vane attached to the piston and movable with the piston between a top dead center (TDC) position and a bottom dead center (BDC) position. The lifter is operable to move the drive blade from the BDC position toward the TDC position. A transmission is provided for providing torque to the lifter. The lifter includes a hub and a plurality of lugs extending from the hub. Each lug is engageable with the drive blade when the drive blade is moved from the BDC position toward the TDC position. The hub and the lugs are integrally formed as a single piece. The lifter includes a first side and an opposite second side. Each of the first side and the second side is flat. 一种紧固件驱动器包括：气缸；活动活塞，该活动活塞定位在气缸内；以及驱动叶片，该驱动叶片附接到活塞并且可与活塞一起在上止点TDC位置与下止点BDC位置之间移动。提升器可操作用于将驱动叶片从BDC位置朝向TDC位置移动。设置传动装置，用于向提升器提供扭矩。提升器包括毂和从毂延伸的多个凸耳。每个凸耳可在将驱动叶片从BDC位置朝向TDC位置移动时与驱动叶片接合。毂和凸耳一体地形成为单件。提升器包括第一侧和相反的第二侧。第一侧和第二侧中的每一者是平坦的。