MUMBAI, India, July 31 -- Intellectual Property India has published a patent application (202617066231 A) filed by Knorr-Bremse Systeme Fr Nutzfahrzeuge Gmbh on May 26, 2026, for Combined Service Brake And Parking Brake Cylinder And Pneumatic Or Electro-Pneumatic Vehicle Brake.
Inventors include Letot, Guillaume; and Hericher, Stphane.
The application for the patent was published on July 24, 2026, under issue no. 30/2026.
Abstract: A combined service brake and parking brake cylinder (1) for actuating a service brake and a parking brake has a spring-loaded parking brake cylinder (2) with a housing (4) which is cylindrical at least in sections, a spring-loaded parking brake piston (21) and at least one accumulator spring (22) which loads the parking brake piston (21) in an actuating direction of the parking brake, wherein the park- ing brake piston (21) is displaceably guided on a radially inner circumferential sur- face of the parking brake cylinder (2), and the parking brake piston (21) and the housing (4) delimit a parking brake chamber (23) which can be ventilated by a parking brake pressure, a service brake cylinder (3) and a service brake piston (31), wherein the service brake cylinder (3) and the service brake piston (31) de- limit a service brake chamber (33) which can be acted upon and vented by a ser- vice brake pressure, a piston rod (5) coupled to the parking brake piston (21) and the service brake piston (31), wherein the service brake cylinder (3), viewed radially, is arranged in- side the parking brake cylinder (2), wherein the housing (4) of the parking brake cylinder (2) is closed at a first end face by a cover (6) provided with an opening (61), into which a first end portion (53) of the piston rod (5) projects, wherein an annular seal (7) is arranged between an outer circumference (51) of the piston rod (5) and an inner circumference of the opening (61) of the cover (6, wherein the seal (7) has a first sealing segment (71) which is designed as an annular lip which rests on an outer end face (62) of the cover (6), preferably on an outer end face of a sleeve (8) of the cover (6), and functions as a pressure relief valve to allow pressurized air to escape into the environment.
Disclaimer: Curated by HT Syndication.
