Patent · US Expired

Pneumatic nail driver

US4448338A · kind A · utility

25Cited by

5References

1Claims

0Family size

Assignee

Hilti Aktiengesellschaft · LI

Inventors

Eugen Graf · Pfullingen, DE
Edwin Kindle · Triesen, LI

Key dates

Filing date	Dec 8, 1981
Grant date	May 15, 1984
Priority date	—
Expiry date	Dec 8, 2001

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB25C1/008
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

In a pneumatic nail driver, compressed air drives a working piston in the driving direction within a working cylinder. An inlet valve controls the flow of compressed air into the working cylinder. A sensing element mounted on the front end of the driver moves opposite to the driving direction when it is pressed against the receiving material for the nail. The sensing element pivots a shift lever which in turn moves a safety valve for controlling in one position the flow of compressed air to the control space associated with the inlet valve and in another position to connect the control space to the ambient atmosphere.

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