Tractor protection valve
AssigneeHaldex Brake Products AB
InventorsRobert L Koelzer, Randy Young
Life of this patent
Estimating the term…
Abstract
A tractor protection valve having a parking brake supply port, a parking brake delivery port, an exhaust port, and a quick release valve positioned between the parking brake supply port and the parking brake delivery port. The quick release valve is movable between a supply position allowing fluid to flow from the parking brake supply port to the parking brake delivery port and an exhaust position allowing fluid to flow from the parking brake delivery port to the exhaust port. The quick release valve may include a diaphragm that is movable between the supply and exhaust positions. The quick release valve may include a valve body that is positioned in a housing of the tractor protection valve.
Claims23
A tractor protection valve comprising:
- a housing that defines a parking brake supply port, a parking brake delivery port, and an exhaust port;
- and
- a quick release valve comprising a diaphragm that is positioned between the parking brake supply port and the parking brake delivery port, wherein the diaphragm is movable between a supply position allowing fluid to flow from the parking brake supply port to the parking brake delivery port and an exhaust position allowing fluid to flow from the parking brake delivery port to the exhaust port, wherein the quick release valve is configured for insertion in the housing through the parking brake delivery port.
A tractor protection valve comprising:
- a housing defining a parking brake supply port, a parking brake delivery port, and an exhaust port;
- and
- a quick release valve comprising a valve body that is positioned in the housing between the parking brake supply port and the parking brake delivery port, wherein the valve body comprises a first channel and a second channel, wherein at least a portion of the quick release valve is movable between a supply position allowing fluid to flow from the parking brake supply port through the first channel to the parking brake delivery port and an exhaust position allowing fluid to flow from the parking brake delivery port through the second channel to the exhaust port, wherein the quick release valve is configured for insertion in the housing through an opening in the housing.
A tractor protection valve comprising:
- a housing that defines a parking brake supply port, a parking brake delivery port, a parking brake exhaust port, a service brake supply port, a service brake delivery port, and a service brake exhaust port;
- a quick release valve positioned between the parking brake supply port and the parking brake delivery port, wherein at least a portion of the quick release valve is movable between a supply position allowing fluid to flow from the parking brake supply port to the parking brake delivery port and an exhaust position allowing fluid to flow from the parking brake delivery port to the parking brake exhaust port, wherein the quick release valve is configured for insertion in the housing through the parking brake delivery port;
- and
- a service brake valve moveable between a supply position allowing fluid to flow from the service brake supply port to the service brake delivery port and an exhaust position allowing fluid to flow from the service brake delivery port to the service brake exhaust port, wherein the service brake valve is in the exhaust position when the quick release valve is in the exhaust position.
Dependencies are inferred from the claim text.