Patent · US Active

Glass cylinder for a piston-cylinder assembly with reduced friction, and method for treating a glass cylinder for a piston-cylinder assembly

US12091358B2 · kind B2 · utility

0Cited by

3References

18Claims

0Family size

Assignees

SCHOTT PHARMA AG & CO. KGAA · DE
SCHOTT PHARMA SCHWEIZ AG · CH

Inventors

Eveline Rudigier-Voigt · Mainz, DE
Jovanna Djordjevic-Reiss · Mainz, DE
Thorsten Schneider · Buxtehude, DE
Joerg Geiger · Gais, CH
Daniel Grigas · South Dennis, US

Key dates

Filing date	Jan 2, 2020
Grant date	Sep 17, 2024
Priority date	—
Expiry date	May 10, 2042

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61M2207/00
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A method of treating a glass cylinder for a piston-cylinder arrangement for reducing the friction of a piston on an inner cylinder wall of the glass cylinder includes: elevating surface energy of glass of an interior bounded by the inner cylinder wall and hence lowering a contact angle of the glass with water. The contact angle is lowered by: a gas discharge that acts on the glass at the inner cylinder wall and is generated by an electric or electromagnetic field; or the action of ozone on the glass surface. The glass with the lowered contact angle is contacted with water to form a water film on the contacted glass.

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