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:
Aug. 02, 1988
Filed:
Mar. 30, 1987
Hans G Eckel, Hirschberg, DE;
Willi Schweikert, Heidelberg, DE;
Firma Carl Freudenberg, Weinheim/Bergstrasse, DE;
Abstract
An air spring, for suspension of a vibrating body on a base, comprising a bellows with an air-filled interior which can be connected as needed by a control valve to a compressed-gas reservoir or to the atmosphere. The control valve is actuated by a piston whose front face is acted upon by the internal pressure of the air spring bellows and whose rear face is acted upon by a gas cushion of variable pressure contained in a pressure chamber, and which produces a compensation of vibration-caused pressure changes in the bellows by feeding additional compressed air in or letting compressed air out. The pressure chamber is provided with a signal-operated inlet valve and a signal-operated outlet valve, and these valves are electrically connected to the signal transmitter of a displacement detector.