Motor vehicle vacuum pump

US11268514B2 · kind B2 · utility

Assignee

• PIERBURG PUMP TECHNOLOGY GMBH · DE

Inventors

• Stefan Hammer · Goldkronach, DE
• WOLFGANG PILENZ · Neukirchen-Vluyn, DE
• ENVER DES · Neuss, DE
• Stefan Sommer · Ergolding, DE
• Moritz Johannes Job · Goldkronach, DE

Key dates

• Filing date: Nov 2, 2015
• Grant date: Mar 8, 2022
• Expiry date: Feb 22, 2037

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F04C2240/805
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

An automobile vacuum pump includes a pump chamber with a pump rotor, an outlet chamber, a partition wall separating the pump chamber from the outlet chamber, and an outlet valve in the partition wall. A compressed gas is discharged from the pump chamber into the outlet chamber via the outlet valve. The outlet valve is formed by a valve opening in the partition wall, a valve seat arranged around the valve opening, and a leaf spring provided as a valve body. The leaf spring includes a spring body which includes a fastening site where the spring body is fixed to the partition wall, and a spring-body-side stopper. The spring-body-side stopper is arranged so that a first distance between the spring-body-side stopper and the fastening site is larger than a second distance between the fastening site and an opening edge of the valve opening which is closest to the fastening site.