Evacuation device
US8240112B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 11, 2007 |
| Grant date | Aug 14, 2012 |
| Priority date | — |
| Expiry date | Nov 19, 2029 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B35/04
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The evacuation device is configured to remove air from a container via a one-way valve element attached to the container. The evacuation device includes a motor with a rotating shaft that extends along an axis line. The shaft is operably interconnected to a reciprocating element reciprocally movable within a chamber along a direction parallel to the axis line. Reciprocal motion of the reciprocal element draws air into and exhausts air from the chamber. To facilitate the operable interconnection, the evacuation device includes a cam having a cylindrical sidewall mounted to the rotating shaft. Disposed circumferentially into the cylindrical sidewall is a channel. The evacuation device further includes a yoke connected to the reciprocal element and having a follower element received in the channel. Rotation of the cam causes the follower element to move with respect to the channel, thereby converting rotational motion to linear translation. The evacuation device may also include a pressure adjustment feature. In one embodiment, the pressure adjustment feature may include a rotating ring with a series of holes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.