Fluid compressors
AssigneeNormalair-Garrett (Holdings) Limited
InventorRobin H. J. Searle
Life of this patent
Estimating the term…
Abstract
A fluid compressor includes a plurality of compression stages each operated sequentially by drive means comprising a pneumatically operated drive piston operating in a drive cylinder. Several embodiments are described and illustrated having different forms of control means and drive and sequencing means for the drive pistons.
Claims20
A fluid compressor comprising a plurality of compression stages each having a compression piston operating in a compression cylinder and individual drive means for driving each compression stage comprising a pneumatically operated drive piston operated in a drive cylinder, wherein each said drive piston is controlled by individual control means, each control means comprising at least one inlet valve and at least one exhaust valve arranged for respectively admitting and exhausting compressed air to and form the drive cylinder at least at one side of the drive piston and drive and sequencing means associated with said control means for operating the respective individual drive means in a predetermined sequence.
A fluid compressor comprising a plurality of compression stages each having a compression piston operating in a compression cylinder and drive means for driving each compression stage comprising a pneumatically operated drive piston operated in a drive cylinder, each said drive piston controlled by control means comprising at least one diaphragm inlet valve co-operating with an annular valve seat opening into the drive cylinder and located centrally of an annular inlet pressure chamber, and at least one diaphragm exhaust valve co-operating with an annular valve set opening into the drive cylinder and located centrally of an annular exhaust chamber, a control pressure chamber located at the side of the diaphragm inlet and exhaust valve opposite said annular inlet pressure and exhaust chambers, the inlet pressure chambers and the control pressure chambers being connected during operation to a supply of pressurized air and the exhaust chambers being connected via the exhaust valve to ambient, said control means including a rotatable cam means adapted to operate valves for selectively venting the control pressure chambers to operate each of the drive pistons and drive and sequencing means for rotating each cam means in a predetermined sequence.
Dependencies are inferred from the claim text.