Patent ID: 11919097
Assignee: MILWAUKEE ELECTRIC TOOL CORPORATION
Field: Machine tools (Mechanical engineering)
Classification: CPC B  F | IPC B  F

Claim 0:
1. A reciprocating saw comprising:
a housing assembly including a housing neck portion and a casing, the housing neck portion defining an aperture and a recess adjacent the aperture, the casing at least partially covering the aperture;
a motor positioned within the housing assembly, the motor including a pinion;
a drive mechanism positioned within the housing assembly, the drive mechanism including a gear coupled to and driven by the pinion, a hub coupled to the gear for rotation with the gear about an axis, a spindle reciprocatable relative to the housing assembly, and a connecting rod extending between the hub and the spindle to transmit rotation of the hub into reciprocation of the spindle; and
a clutch assembly coupled to the drive mechanism to selectively transmit a drive force from the gear to the hub, the clutch assembly including
a first disk coupled to the gear,
a second disk coupled to the hub,
a biasing member positioned between the hub and the first disk to bias the first and second disks into frictional engagement with each other, and
a threaded fastener having a threaded portion and a head, the threaded fastener extending through the gear and threadably engaging the hub to couple the hub to the gear, wherein tightening the threaded fastener pulls the hub toward the gear to preload the biasing member;

wherein the first disk, the second disk, and the biasing member are positioned within an opening in the gear, and wherein the biasing member biases the first and second disks into the opening; and
wherein the recess of the housing neck portion receives the threaded portion of the threaded fastener, and wherein the head of the fastener is disposed along the axis beyond the recess in a direction toward the casing.