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:
Nov. 12, 2002
Filed:
Jul. 03, 2001
Alf Siebke, Munich, DE;
Knorr-Bremse Systeme fuer Nutzfahrzeuge GmbH, Munich, DE;
Abstract
The invention relates to a pressure spring arrangement for brake cylinders, especially of the type installed in commercial vehicles. When using a pressure spring which comprises at least one retracted end, the facing support for the final winding is configured such that when the spring tip of the final winding is applied, a degree of freedom of the deformation exists for the final winding of the pressure spring which exists with a negative angle of incidence, i.e. with an inclination direction contrary to the angle of inclination of the springy windings of the pressure spring. When the final winding of the pressure spring emerges into the adjacent spring winding and during simultaneous deformation along the negative angle of incidence, the pressure spring absorbs additional energy which can be converted into increased spring action during a lifting movement. A roll-off ramp advantageously predetermines the degree of freedom of the deformability of the final winding along a negative angle of incidence. Said roll-off ramp is either directly configured on the side of the piston or of the base, said side facing the pressure spring, or is configured on the facing side of an insert which can be separately inserted.