Hydraulic variable pump set and excavator
US11280357B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 26, 2018 |
| Grant date | Mar 22, 2022 |
| Priority date | — |
| Expiry date | Dec 26, 2038 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B2211/20553
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Provided is a hydraulic variable pump set, including a pump body component and an oil supplement component. The pump body component includes a pump body, a first slide valve, and a first control valve. The first slide valve includes a spring end and a pilot cavity. The first control valve is provided with an oil inlet A, an oil inlet B, and an oil outlet T. The pump body includes a variable pump and a variable cylinder. The variable pump includes a swash plate. The variable cylinder includes a rod cavity and a rodless cavity. The variable cylinder is mechanically connected to the spring end and the swash plate. The oil supplement component is in communication with the pilot cavity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.