Swash plate type compressor wherein piston head has inner sliding portion for reducing local wear
US6484621B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 24, 2000 |
| Grant date | Nov 26, 2002 |
| Priority date | — |
| Expiry date | May 24, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B27/0878
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Swash plate type compressor including a cylinder block having cylinder bores arranged along a circle, a drive shaft aligned with the circle, a swash plate rotated with the drive shaft, and single-headed pistons each including a head portion engaging the cylinder bore, and a neck portion engaging the swash plate, and wherein each piston is reciprocated by the swash plate rotated by the drive shaft, and the head portion includes a circular body portion, and an outer sliding portion and an inner sliding portion which are disposed between the body portion and the neck portion and which slidably engage respective circumferential portions of the cylinder bore which correspond to respective radially outer and inner portions of the cylinder block. Length from the end face of the body portion to the remote end of the inner sliding portion is larger than the corresponding length of the outer sliding portion. The inner sliding portion has a distal sliding part spaced from the end face by at least 40% of the entire piston length and having a central angle of not larger than 120° and a length of at least 5% of the entire piston length.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.