Pump device
US4118151A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 22, 1976 |
| Grant date | Oct 3, 1978 |
| Priority date | — |
| Expiry date | Oct 22, 1996 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B19/027
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A pump device comprises a pump for pumping a liquid from a liquid source, a rotational driving power source operable continuously, transmission means for transmitting rotational driving power from the power source to the pump, detecting means for detecting the pressure of the liquid pumped and delivered by the pump, and clutch means provided in the power transmission path of the transmission means. The liquid pressure detecting means is adapted to operate accordingly when said liquid pressure fluctuates from a predetermined set pressure to controllably vary the rate of power transmission of said clutch means, while causing the operation of said rotational driving power source to continue uninterruptedly, thereby to control the pump delivery pressure at a constant value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.