Adjustable crankpin throw structure having improved throw stabilizing means
US6092993A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 14, 1997 |
| Grant date | Jul 25, 2000 |
| Priority date | — |
| Expiry date | Aug 14, 2017 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B2400/074
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A stabilizing structure for a throw adjusting eccentric cam in a two-stage reciprocating compressor is provided. The compressor includes a block that has at least one cylinder with an associated compression chamber and piston, a crankshaft that includes an eccentric crankpin, and a reversible motor for rotating the crankshaft in a forward and a reverse direction. An eccentric, two position cam is rotatably mounted over the crankpin. The cam rotates to and operates at a first position relative to said crankpin when the motor is running in the forward direction and rotates to and operates at a second position relative to said crankpin when the motor is running in the reverse direction. The combined eccentricities of the crankpin and the cam cause the piston to have a first stroke when the motor operates in the forward direction and a second stroke when the motor operates in the reverse direction. There is also provided a control for selectively operating the motor either in the forward direction or in the reverse direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.