Extendable and retractable cleaning apparatus
US4646768A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 1984 |
| Grant date | Mar 3, 1987 |
| Priority date | — |
| Expiry date | Jun 29, 2004 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF22B37/483
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
An extendable and retractable cleaning apparatus includes a multi-stage extendable and retractable arm assembly formed of a plurality of cylindrical members assembled in a telescopic manner, an ejection nozzle provided at a tip end of the innermost cylindrical member of the arm assembly, a mount housing surrounding a substantially central portion of the arm assembly to rotatably support the arm assembly and a casing integrally formed at a base end of the outermost cylindrical member of the arm assembly to form a pressure chamber in cooperation with the assembly. A rotational driving device is provided within the housing for rotationally driving the arm assembly. A washing liquid feed hose is connected to the ejection nozzle. A compressed air feed pipe has one end mounted to the casing to communicate with the pressure chamber. A control device controls the amount and speed of extension and retraction of the arm assembly and includes a perforated metallic belt connected to a base end of the innermost cylindrical member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.