Transmission assembly having an expansion bladder
US9046114B1 · kind B1 · utility
2Cited by
13References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 30, 2012 |
| Grant date | Jun 2, 2015 |
| Priority date | — |
| Expiry date | Jan 5, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D31/02
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A transaxle includes an expansion bladder disposed in a sump for a hydraulic transmission, where the expansion bladder forms an air chamber separate from the sump and open to atmospheric pressure. The expansion bladder includes a set of ribs formed on an internal surface of a wall structure and extending into the air chamber to prevent unwanted collapse of the expansion chamber and improve its ability to collapse in a controlled manner as oil in the sump expands.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.