Indication means in a brake cylinder for a vehicle brake

Details Indication means in a brake cylinder for a vehicle brake Indication means in a brake cylinder for a vehicle brake

1998-05-28

1999-08-31

Nguyen, Hoang

Expansible chamber devices

With inspection window in expansible chamber wall portion

With lock

91 1, 91363R, F01B 2526

Patent

active

059439408

ABSTRACT:
An indication means in a brake cylinder for a vehicle brake with a spring activated parking brake in which the brake cylinder comprises a cylinder housing (3) with a casing wall (22) and at least one gable (23). A pressure spring (5) is positioned between the piston (4) and the gable (23) of the cylinder housing for activating the parking brake by mechanically influencing the piston (4) of the brake cylinder. A bar (11) is axially displaceable relative to the release screw (1) in the throughbore (34) in the release screw (1). The bar (11) at a first end, within the cylinder housing (3), has a position sensing body (8, 16) which is axially fixed to the bar (11) and provided with a contact surface (40) for contact against the nut (7). At a second end the bar (11) has an indication body (12) which visibly protrudes out of the screw head (36) of the release screw (1) in case of axial displacement of the bar (11). This occurs due to axial displacement of the nut (7) from its outer end position, and of the contact surface (40) of the position sensing body (8, 16), which surface is in contact with the nut during rotation of the release screw (1) for mechanical release of the parking brake.

REFERENCES:
patent: 3572214 (1971-03-01), Woodward
patent: 3726191 (1973-04-01), Johnston et al.
patent: 4386552 (1983-06-01), Foxwell
patent: 4945818 (1990-08-01), Ware
patent: 4987823 (1991-01-01), Taplin et al.
patent: 5649469 (1997-07-01), Pierce

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