Conversion valve assembly
US6536074B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 9, 2001 |
| Grant date | Mar 25, 2003 |
| Priority date | — |
| Expiry date | May 9, 2021 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47L5/32
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A conversion valve arrangement for converting a vacuum cleaner from floor use to off-the-floor use. A valve door located in the suction duct leading from the nozzle body shuts off the suction airstream to the nozzle body when the vacuum cleaner is moved into the upright stored position. A projection on the motor housing located beneath the handle engages a resilient member cooperating with a crank arm on the valve door to close the valve door when the handle is moved to the upright position. The resilient member is comprised of a front valve arm and a rear valve arm pivotally linked together. The motion of the rear valve arm is transmitted to the front valve arm in one direction by a stop. The motion of the rear valve arm is transmitted to the front valve arm in the opposite direction by the stiffness of a spring disposed between them. The resiliency of the spring will allow the rear valve arm to rotate relative to the front valve arm should the valve door become stuck in the open position when the handle is moved to the upright position to prevent damage to the projection on the motor housing, the rear valve arm, front valve arm, torsional coil spring, and valve door.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.