Patent · US Expired

Automatically locking chuck for drill or the like

US5174588A · kind A · utility

54Cited by

11References

15Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Wilbert Reibetanz · Leinfelden, DE
Karl Wanner · Echterdingen, DE
Otto Baumann · Echterdingen, DE
Rolf Muller · St. Georgen, DE

Key dates

Filing date	Oct 11, 1991
Grant date	Dec 29, 1992
Priority date	—
Expiry date	Oct 11, 2011

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T279/32
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A chuck for use in a percussion drill or the like has a unit for securing the chuck jaws against unintentional loosening during operation. The securing unit moves from an unlocked position in which a tool can be received by the chuck jaws to a locked position automatically for drilling operations without the use of a key. The securing unit includes a first surface (22) upon which a sliding member (21) is slidable to be received in a recess (26) during the shaking caused by drilling, so that coupling members (15, 19) between a securing sleeve (17) and a clamping sleeve (13) engage with one another.

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