Patent ID: 7442016

Claim:
A method of assembling a scroll pump, the scroll pump comprising a housing; a drive shaft having an eccentric shaft portion; first bearing means for supporting the drive shaft for rotation; second bearing means for supporting an orbiting scroll on the eccentric shaft portion so that during use rotation of the shaft imparts an orbiting motion to the orbiting scroll which co-operates with a second scroll for pumping fluid along a fluid flow path between an inlet and outlet of the pump; and a bellows arrangement for isolating the first bearing means and the second bearing means from the fluid flow path and for providing relative rotational location of the orbiting scroll with respect of the second scroll; comprising the steps carried out sequentially of: mounting the first bearing means and the drive shaft for rotation relative to the housing; fastening a first flange portion of the bellows arrangement relative to the housing; fastening the orbiting scroll to a second flange portion of the bellows arrangement; and fixing the second scroll relative to the housing for co-operation with the orbiting scroll.