Ladder motor pump system
US12139883B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 29, 2022 |
| Grant date | Nov 12, 2024 |
| Priority date | — |
| Expiry date | Jan 12, 2043 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60Y2200/412
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A ladder motor pump system comprises a hydraulic fluid tank that holds hydraulic fluid, a hydraulic pump that draws and pressurizes the hydraulic fluid from the hydraulic fluid tank, a one-way electric motor that drives the hydraulic pump, a hydraulic ladder actuator that actuates a ladder in first and second patterns, a hydraulic fluid circuit that routes the hydraulic fluid from the hydraulic ladder actuator to the hydraulic fluid tank, and a regulator that routes the pressurized hydraulic fluid from an outlet of the hydraulic pump to the hydraulic fluid tank when a pressure of the pressurized hydraulic fluid exceeds a preselected threshold pressure, mixing the pressurized hydraulic fluid with the unpressurized hydraulic fluid in the hydraulic fluid tank and reducing temperature of the pressurized hydraulic fluid. The electric motor and the pump include bosses providing increased ground connections to the electrical ground, thereby reducing electrical resistance and heat generated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.