Combined service brake and spring type brake cylinder having...

Details Combined service brake and spring type brake cylinder having... Combined service brake and spring type brake cylinder having...

2006-07-27

2010-12-07

Schwartz, Christopher P (Department: 3657)

Brakes

Operators

Fluid pressure

C092S063000

Reexamination Certificate

active

07845474

ABSTRACT:
A combined service brake and spring brake cylinder has a diaphragm arranged in a housing of the service brake cylinder. At one side, the diaphragm delimits a service brake chamber acted on with a service brake pressure, and at the other side delimits a chamber accommodating a return spring. A spring brake piston is arranged in a housing of the spring brake cylinder, which at one side delimits a spring brake chamber and at the other side delimits a spring chamber. A piston rod supports a ventilation valve which produces or blocks a flow connection between the spring chamber and the service brake chamber. The ventilation valve includes a piston interacting with a valve seat. At least one further piston interacts with a further valve seat and opens at least one further flow cross-section when in its position raised from the further valve seat. When the parking brake is applied and the service brake is simultaneously actuated with service brake pressures lower than a pressure threshold, one piston is raised from the valve seat and the further piston is sealed against the further valve seat.

REFERENCES:
patent: 3736842 (1973-06-01), Valentine
patent: 5722311 (1998-03-01), Pierce et al.
patent: 7513341 (2009-04-01), Lachermeier
patent: 2009/0134697 (2009-05-01), Savagner et al.
patent: 40 11 739 (1991-10-01), None
patent: 0 020 862 (1981-01-01), None
patent: 0 025 558 (1981-03-01), None
patent: 0 279 930 (1988-08-01), None
patent: 0 554 050 (1993-08-01), None
patent: 1 237 641 (1971-06-01), None
International Search Report dated Oct. 2, 2006 including English translation (Six (6) pages).
International Preliminary Report with English translation (Fifteen (15) pages).

Affiliated with

Also associated with

Rating

Combined service brake and spring type brake cylinder having... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Combined service brake and spring type brake cylinder having..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Combined service brake and spring type brake cylinder having... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4237760