Patent ID: 9551333
Date: 2017-01-24
CPC Classifications: F01C,F04B,F04C

Claim:
1. A method comprising: assembling longitudinal seals between a first half-shell stator component and a second half-shell stator component along a first longitudinally extending face of the first half-shell stator component and a second longitudinally extending face of the second half-shell stator component to form a seal between the first and second half-shell stator components, wherein the first and second half-shell stator components define a plurality of pumping chambers; and assembling annular seals that are separate from the longitudinal seals between a first end stator component at a first longitudinal end face of the first half-shell stator component and between a second end stator component at a second longitudinal end face of the second half-shell stator components to form a seal between the first and second end stator components and the first and second half-shell stator components, wherein the longitudinal seals have end portions which abut against the annular seals to seal therebetween and the first and second half-shell stator components have formations that resist movement of the end portions away from the annular seals when the end portions are compressed between the first and second half-shell stator components.