Manually operated control valve and testing apparatus incorporating such valve
AssigneeHope Technical Developments Limited
InventorsFrederick John Charles Hope, James Malcolm Pigney
Life of this patent
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Abstract
Disclosed herein is a manually operated control valve wherein a pressure regulating valve and exhaust valve are contained in the same housing with intercommunicating passages, both valves having actuating plungers which are operated by a single manual operating means, such as a lever. The invention includes apparatus for testing vehicle pneumatic braking systems wherein the manually operated control valve is used in conjunction with a pressure gauge to test the system by controlling the supply and exhaust of air to and from the vehicle braking system and observing accompanying variations in pressure.
Claims9
A manually-operated control valve including manual operating means for controlling the supply and exhaust of a working fluid to and from a fluid operable system which comprises a housing having an inlet for the working fluid and an outlet for delivering working fluid to the system, a pressure-regulating valve disposed between said inlet and said outlet and an exhaust valve for exhausting fluid from the system, said regulating valve and said exhaust valve each including actuating means comprising plungers which are operable by a single manual operating means.
Apparatus for testing vehicle pneumatic braking systems which comprises a conduit for connection to a pressurized gas source, a manually-operated control valve for controlling the supply and exhaust of gas to and from the vehicle and a pressure gauge connected to the control valve for indicating pressure of gas supplied to the vehicle braking system, said control valve including manual operating means comprising a housing having an inlet adapted for connection to the pressurised gas source and an outlet for delivering pressurised gas to the vehicle via the pressure gauge, a pressure-regulating valve disposed between said inlet and outlet and an exhaust valve for exhausting pressurised gas from the system, said regulating valve and said exhaust valve each including actuating means comprising plungers which are operable by a single manual operating means.
Dependencies are inferred from the claim text.