Patent · US Expired

Gear pump

US5462420A · kind A · utility

11Cited by

7References

15Claims

0Family size

Assignee

MAAG PUMP SYSTEMS AG · CH

Inventors

Roger Stehr · Bülach, CH
Urs A. Boelsterli · Bassersdorf, CH

Key dates

Filing date	Dec 15, 1993
Grant date	Oct 31, 1995
Priority date	—
Expiry date	Dec 15, 2013

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF04C15/0038
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A gear pump comprising a housing for housing gear pump rotors in a housing interior, said housing having a housing end at an end face side of the housing through which at least one pump rotor shaft is guided from the housing interior to outside the housing, a shaft bearing in the housing end for rotatably supporting the rotor shaft, and a labyrinth seal in the housing end which in use surrounds the rotor shaft, wherein the shaft bearing is arranged separately from the labyrinth seal at a position spaced axially inward toward the housing interior with respect to the labyrinth seal.

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