Patent · US Expired

Power driven saw with reciprocating saw blades

US4969270A · kind A · utility

11Cited by

10References

23Claims

0Family size

Assignee

BLACK & DECKER INC. · US

Inventors

Ulrich Berghauser · Traunstein, DE
Horst Grossmann · Brechen, DE
Karl Schmid · Denver, US
Ernst Staas · Limburg, DE

Key dates

Filing date	Oct 30, 1987
Grant date	Nov 13, 1990
Priority date	—
Expiry date	Oct 30, 2007

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T83/8878
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A power saw has two oppositely reciprocating saw blades guided and supported in a receiving slot in a support plate. The blades are supported during sawing along shoulders on their outside by lower edges of support sections of the support plate. The arrangement is such that forces generated in operation during cutting press the saw blades together in the area of their teeth. This prevents saw dust, chippings etc. penetrating between the two saw blades. Preferably, the thickness of the saw blade shoulders are not greater than half the thickness of the saw blades, and preferably no greater than the thickness of the support section edges. The teeth of the saw blades may be so ground and arranged that the resultant force on the teeth during cutting also forces the saw blades together at their teeth.

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