The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 01, 1983
Filed:
Nov. 28, 1980
Peter Woerwag, Stuttgart, DE;
Duepro AG, Romanshorn, CH;
Abstract
Disclosed is an improvement in a vacuum cleaner having a roller-shaped brush mounted in the vacuum nozzle thereof. A separate rotational speed control is provided for the electric motor which operates the roller-shaped brush and in preferred embodiments this rotational speed control is adjustable by the operator of the vacuum cleaner. In a further embodiment, two separate rotational speed controls are provided, one controlling the speed of the roller-brush motor and the other controlling the speed of the vacuum-generating motor. A still further embodiment comprises a single rotational speed control which can be interchangeably switched into or out of connection with either the roller-brush motor or the vacuum-generating motor. A still further embodiment discloses a roller-brush motor speed control which can be added to existing vacuum cleaners.