Girling Limited

Brian Ingram

David Anthony Harries

Henry Jamieson Riddoch

Ramamurthy Natarajan

A drum brake is disclosed in which at least two, and preferably four, friction pad assemblies are symmetrically arranged with respect to the drum. The pad assemblies are slidably guided for movement towards and away from the drum in a substantially radial direction on drag-taking abutments in a relatively stationary drag-taking member, and the pad assemblies are applied to the drum by levers upon which actuators act.

Drum brakes for vehicles

A booster operated master cylinder piston for use in an anti-skid braking system includes a modulator piston located between the master cylinder piston and the booster valve assembly. In the event of a skid the pressure of booster fluid acting on the modulator piston is relieved.

Master cylinder assemblies for vehicle hydraulic braking systems

An actuator assembly for a vehicle brake includes three axially aligned pistons, a first actuating piston for applying the brake hydraulically during normal service braking; a modulator piston movable for anti-skid purposes between a first position in which an inlet valve controlling the supply of fluid to the first actuating piston is open, and a second position in which the inlet valve is closed; and a second actuating piston resiliently urged through the modulator piston to engage the first actuating piston to apply the brake for parking purposes but normally held out of engagement by fluid pressure in a chamber formed between the modulator piston and the second actuating piston, the pressure in the chamber also holding the modulator piston in the first position.

Actuator assemblies for vehicle brakes

In an anti-skid pneumatic braking system for vehicles a brake is applied by air from a first reservoir and the braking effort modulated by air from a second reservoir. The brake is connected to the second reservoir through two normally closed diaphragm valves in series, the first valve opened by air supplied to the brake from the first reservoir when the brake is applied and the second valve opened by air supplied from the second reservoir in skid conditions. Additionally a third normally closed diaphragm valve can be connected across the diaphragm of the brake actuator and is opened in skid conditions.

Growing community of inventors

Balsall Common, United Kingdom

Brian Ingram