Two-cylinder pump
US6331101A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 21, 2001 |
| Grant date | Dec 18, 2001 |
| Priority date | — |
| Expiry date | Mar 21, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B39/121
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A two-cylinder air compressor has a motor with a through drive shaft. Identical housings are provided at each end of a cylindrical spacer sleeve that surrounds the motor. The housings include cylinder housing extensions each of which mounts a cylinder sleeve, a valve plate, and a head. The heads are part of a one-piece cylinder head member. Wobble pistons are mounted on each end of the motor shaft and operate in the cylinder sleeves. The cylinder sleeves rest on a floor in the housing which has integrally formed passages for cooling air to circulate around the cylinder sleeves. The one-piece cylinder head member includes integral tubes connecting the heads. The integral tubes span the distance between the beads and are spaced from the outside of the spacer. The housings may be joined by through bolts or without bolts by press fitting the bearings in the housing, press fitting the housings to the spacer sleeve, and press fitting the motor shaft into the bearings. The one-piece cylinder head serves as the final retention member, clamping the housings axially while maintaining radial orientation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.