Vehicle low pressure brake arrangement
First Claim
1. A vehicle braking arrangement comprising:
- a braking plate including a sealing rim running circumferentially adapted to at least partially contact the ground in a braking position such that an at least partly enclosed volume then is formed between the braking plate and the ground, the braking plate movable to the braking position from a rest position;
an expandable chamber at least fluidly connectable to the at least partly enclosed volume and where, when the braking plate is in the braking position, a volume of the expandable chamber is arranged to expand, from a first volume to a second volume such that air pressure in the expandable chamber initially falls below an air pressure of ambient air, such that, when the expandable chamber is fluidly connected to the at least partly enclosed volume, the pressure is lowered in the at least partly enclosed volume as a result of a lowered pressure in the expandable chamber, which results in pressing of the braking plate against the ground by a conferred pressure difference between air outside the at least partly enclosed volume and air in the at least partly enclosed volume such that a retaining force between the braking plate and the ground is obtained; and
a valve assembly fluidly connecting the expandable chamber and the at least partly enclosed volume, the valve assembly including a trigger pin, at least one locking pin, a piston and a housing, the piston being co-axially arranged in the housing, the housing includes at least one aperture that connects the expandable chamber to an interior of the housing, the piston being locked in sealing engagement with the housing by the locking pin, the trigger pin being arranged to release the piston by acting on the locking pin when the trigger pin is pressed against the ground, the piston when released allowing a fluid connection between the enclosed volume and the expandable chamber to be established.
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Accused Products
Abstract
A vehicle braking arrangement includes a braking plate connected to a vehicle by a link arm. The braking plate is movable from a rest position to a braking position where contact is made with the ground, and includes a sealing rim arranged to at least partially contact the ground such that an at least partly enclosed volume is formed. The vehicle braking arrangement includes an expandable chamber formed between a lower plate, at least one connecting side wall and an upper plate, which chamber is connectable to the volume. Upon activation, the chamber'"'"'s volume is expanded by movement of the lower plate away from the upper plate. Then the pressure is lowered in the volume which results in that the braking plate is pressed against the ground. In this way, a retaining force is obtained.
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Citations
13 Claims
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1. A vehicle braking arrangement comprising:
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a braking plate including a sealing rim running circumferentially adapted to at least partially contact the ground in a braking position such that an at least partly enclosed volume then is formed between the braking plate and the ground, the braking plate movable to the braking position from a rest position; an expandable chamber at least fluidly connectable to the at least partly enclosed volume and where, when the braking plate is in the braking position, a volume of the expandable chamber is arranged to expand, from a first volume to a second volume such that air pressure in the expandable chamber initially falls below an air pressure of ambient air, such that, when the expandable chamber is fluidly connected to the at least partly enclosed volume, the pressure is lowered in the at least partly enclosed volume as a result of a lowered pressure in the expandable chamber, which results in pressing of the braking plate against the ground by a conferred pressure difference between air outside the at least partly enclosed volume and air in the at least partly enclosed volume such that a retaining force between the braking plate and the ground is obtained; and a valve assembly fluidly connecting the expandable chamber and the at least partly enclosed volume, the valve assembly including a trigger pin, at least one locking pin, a piston and a housing, the piston being co-axially arranged in the housing, the housing includes at least one aperture that connects the expandable chamber to an interior of the housing, the piston being locked in sealing engagement with the housing by the locking pin, the trigger pin being arranged to release the piston by acting on the locking pin when the trigger pin is pressed against the ground, the piston when released allowing a fluid connection between the enclosed volume and the expandable chamber to be established. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A vehicle braking arrangement comprising:
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a braking plate including a sealing rim running circumferentially adapted to at least partially contact the ground in a braking position such that an at least partly enclosed volume then is formed between the braking plate and the ground, the braking plate movable to the braking position from a rest position; an expandable chamber at least fluidly connectable to the at least partly enclosed volume and where, when the braking plate is in the braking position, a volume of the expandable chamber is arranged to expand, from a first volume to a second volume such that air pressure in the expandable chamber initially falls below an air pressure of ambient air, such that, when the expandable chamber is fluidly connected to the at least partly enclosed volume, the pressure is lowered in the at least partly enclosed volume as a result of a lowered pressure in expandable chamber, which results in pressing of the braking plate against the ground by a pressure difference between air outside the at least partly enclosed volume and air in the at least partly enclosed volume such that a retaining force between the braking plate and the ground is obtained, wherein a first side of the expandable chamber is connected to the braking plate and a second side of the expandable chamber carries a link arm for movable attachment to a chassis of the vehicle.
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Specification