Scroll apparatus with pressurizable fluid chamber for axial scroll bias
US3994633A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 24, 1975 |
| Grant date | Nov 30, 1976 |
| Priority date | — |
| Expiry date | Mar 24, 1995 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C2240/807
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A positive fluid displacement apparatus employing scroll members having interfitting spiroidal wraps angularly and radially offset such that as one of the scroll members is orbited, moving fluid pockets of variable volume and different fluid pressures are formed. Axial load carrying of the scroll members is achieved pneumatically through the introduction of a fluid into a pressurizable fluid chamber within the housing and in axial force applying relationship with the orbiting scroll member. The pressurizable fluid chamber may constitute essentially all or only a part of the internal volume of the housing and it is isolated from the fluid pockets. This type of axial load carrying materially reduces the loads which must be carried through the crankshaft and decreases the size and complexity of the bearings. The apparatus is particularly well suited to compressors operating at high exhaust pressures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.