Lever hoist
AssigneeColumbus Mckinnon Industrial Products GmbH
InventorsDetlef STRUCK, Wolfram SCHNEEBECK
Life of this patent
Estimating the term…
Abstract
A lever hoist including a housing, in which a load chain wheel and a drive shaft are rotatably mounted. A drive torque is transmittable to the drive shaft via a lever. A load chain is moveable via the load chain wheel. The ratchet wheel has an internal thread and is axially displaceable on a threaded portion of the drive shaft having a brake thread. A damping spring is on a drive-side portion of the drive shaft between the threaded portion and an outer stop. If the load chain is blocked, when the load no longer continues to slip in a sliding manner, the ratchet wheel is pushed against the pressure of the damping spring until the pawl body is displaced out of the drive teeth into the untoothed disengagement portion.
Claims9
1-8. (canceled)
A lever hoist, comprising:
- a housing, in which a load chain wheel and a drive shaft configured to drive the load chain wheel via a gear mechanism, are rotatably mounted;
- a lever connected to the drive shaft, a drive torque transmittable to the drive shaft via the lever;
- a load chain connected to the load chain wheel, the load chain movable via the load chain wheel;
- a load pressure brake comprising:
- a pressure disk and a ratchet wheel which are arranged on the drive shaft, and
- a ratchet wheel disk between the pressure disk and the ratchet wheel, wherein
- the ratchet wheel comprising an internal thread is axially displaceable on a threaded portion of the drive shaft having a brake thread, and
- the ratchet wheel further comprises:
- drive teeth on an outer circumference of the ratchet wheel for engagement of a pawl body, and
- an untoothed disengagement portion on the outer circumference between the drive teeth and an end of the ratchet wheel facing the pressure disk;
- and
- a damping spring on a drive-side longitudinal portion of the drive shaft, between the brake thread and an outer stop of the drive shaft.
Dependencies are inferred from the claim text.