Patent · US Expired

Retractable rule assembly with improved blade opening

US6892468B2 · kind B2 · utility

22Cited by
37References
27Claims
0Family size

Assignee

Inventor

Key dates

Filing dateApr 17, 2003
Grant dateMay 17, 2005
Priority date—
Expiry dateApr 17, 2023

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG01B2003/1053
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

A retractable rule assembly includes wear resistant structure formed of a wear resistant material. The wear resistant structure is mounted at each lateral side of a blade opening of the rule assembly's housing to substantially protect the plastics material at the lateral sides from wear by the lateral side edges of the blade. An alternative retractable rule assembly has rollers rotatably mounted at each lateral side of the blade opening.

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