Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
155 words
High-vacuum molecular pump comprising at least two coaxial elements mounted rotatably with respect to each other and close to each other so that a narrow pump space is formed between said elements, at least one helical groove in one of said elements and extending through the pump space, and a substantially annular gas supply chamber at an end of a pair of said elements which is bounded by parts of said elements, which annular gas supply chamber is arranged between a gas supply and the pump space and is in communication therewith, wherein the parts of said elements which bound the annular gas supply chamber are so shaped that near the gas supply the annular gas supply chamber is wide relative to the pump space and narrows gradually downstream towards the pump space, and wherein said helical groove continues beyond the pump space and along the full axial length of the annular gas supply chamber.
Claim 2
Dependent Claim
155 words
High-vacuum molecular pump comprising at least two coaxial elements mounted rotatably with respect to each other and close to each other so that a narrow pump space is formed between said elements, at least one helical groove in one of said elements and extending through the pump space, and a substantially annular gas supply chamber at an end of a pair of said elements which is bounded by parts of said elements, which annular gas supply chamber is arranged between a gas supply and the pump space and is in communication therewith, wherein the parts of said elements which bound the annular gas supply chamber are so shaped that near the gas supply the annular gas supply chamber is wide relative to the pump space and narrows gradually downstream towards the pump space, and wherein said helical groove continues beyond the pump space and along the full axial length of the annular gas supply chamber.
Claim 3
Dependent Claim
21 words
High-vacuum molecular pump according to claim 1, characterized in that the juxtaposed sides of the elements are substantially surfaces of revolution.
Claim 4
Dependent Claim
18 words
High-vacuum molecular pump according to claim 2, characterized in that said surfaces of revolution include parts of cylinders.
Claim 5
Dependent Claim
16 words
High-vacuum molecular pump as in claim 2 wherein said surfaces of revolution include parts of cones.
Claim 6
Dependent Claim
43 words
High-vacuum molecular pump according to any one of the claims 1, characterized in that one of the elements is an immovably stator fixed, that the other element is rotatably arranged within the stator, and that the helical groove is provided in the stator.
Claim 7
Dependent Claim
72 words
High-vacuum molecular pump as in claim 1 wherein said two coaxial elements are a rotor and a stator, said rotor having a generally cylindircal body portion and an end portion of reduced cross-section projecting axially beyond said pump space and disposed within said annular gas supply chamber, said helical groove being in said stator and extending axially beyond said pump space to a position opposite said reduced end portion of said rotor.