Pump system
US11246725B2 · kind B2 · utility
0Cited by
186References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 9, 2020 |
| Grant date | Feb 15, 2022 |
| Priority date | — |
| Expiry date | Feb 23, 2040 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2002/802
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A vacuum suspension system includes a foot cover having a heel portion and a pump system located in the heel portion. The pump system includes upper and lower sections arranged to move in an axial direction relative to one another and a pump mechanism operatively connected to and positioned between the upper and lower sections. When the heel portion is loaded in stance the pump mechanism moves from an original configuration in which the volume of a fluid chamber defined by the pump mechanism is zero or near-zero, to an expanded configuration in which the volume of the fluid chamber is increased.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.