Actuator unit for controlling hydraulic pump
US10641389B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 14, 2017 |
| Grant date | May 5, 2020 |
| Priority date | — |
| Expiry date | Nov 15, 2037 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H47/02
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An HST control mechanism includes a rotary member, a servo unit, a telescopic member, and a biasing device. The rotary member for controlling a displacement of a hydrostatic transmission (HST) is pivoted outside of a casing incorporating the HST. The servo unit includes a telescopically movable actuator and a valve controlling the telescopic movement of the actuator. The actuator is interlockingly connected to the rotary member. The servo unit is pivotally supported on the casing via a first pivot. The servo unit rotates centered on the first pivot as the rotary member rotates according to the telescopic movement of the actuator hydraulically controlled by the valve. The telescopic member is pivotally supported on the casing via a second pivot. The telescopic member is provided with the biasing device that biases the telescopic member and the rotary member toward a position corresponding to a neutral state of the HST.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.