Pneumatic locking swivel caster
US7017228B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Sep 30, 2003 |
| Grant date | Mar 28, 2006 |
| Priority date | — |
| Expiry date | Sep 30, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60B33/021
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A pneumatic locking swivel caster comprises a swivel caster and a locking device which may be activated by fluid pressure. The swivel caster may be a dual wheel swivel caster. An improved theatrical prop or scenery element comprises a pneumatic locking swivel caster and a control system. The control system may comprise a tank filled with pressurized air and a control valve. A pneumatic locking swivel caster may be locked into position by activating the control valve and pressuring the caster with air. The pneumatic locking swivel caster may comprise a triple swivel caster adapted such that all three sets of wheels are locked by air pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.