Patent · US Expired

Torque limiting screwdriver

US6487943B1 · kind B1 · utility

46Cited by

6References

6Claims

0Family size

Assignee

KAPMAN AB · SE

Inventors

Conny Jansson · Hagfors, SE
Mattias Magnusson · Enköping, SE
Håkan Bergkvist · Bromma, SE

Key dates

Filing date	Oct 10, 2000
Grant date	Dec 3, 2002
Priority date	—
Expiry date	Oct 10, 2020

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB25B23/1427
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A torque-limiting screwdriver includes a shank disposed within a handgrip. A rear end of the shank engages the handgrip to enable an axial force to be transmitted from the handgrip to the shank. A release mechanism is provided to transmit rotation from the handgrip to the shank. The release mechanism is axially movable relative to both the handgrip and the shank and is spring biased into rotation transmitting relationship with the shank, whereby the rotation transmitting force applied to the shank is substantially independent of the axial force applied from the handgrip to the shank.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.