Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
253 words
A head used for gaseous or liquid fluids to perform at least one of sample injection and extraction, comprising: an inner bore within the head sized to accommodate a syringe needle thereinto; an inlet valve means having a closed position for blocking the inner bore and including a substantially cylindrical valve body which is sealingly spring biased toward said inner bore and having a protrusion member extending into recess means of said head and being displaceable by a syringe needle being inserted into said inner bore for moving said valve means against said spring bias in a direction along the valve body axis which forms an angle in the range of greater than 90° up to less than 180° with the axis of the inner bore through which the syringe needle passes toward said recess means; a cylindrical guide means within the head for said valve body, said guide means ending in said recess means of said head, which recess means extends across and in communication with said inner bore and provides an annular sealing surface means; and said cylindrical protrusion member of the valve body supporting a sealing ring which, in the closed position of said valve means, is in sealing engagement with said sealing surface means; wherein said protrusion member extends into said recess means so that upon the introduction of a syringe needle its tip first impinges onto the front face of said protrusion member and displaces said valve body together with said sealing ring out of said recess means.
Claim 2
Dependent Claim
253 words
A head used for gaseous or liquid fluids to perform at least one of sample injection and extraction, comprising: an inner bore within the head sized to accommodate a syringe needle thereinto; an inlet valve means having a closed position for blocking the inner bore and including a substantially cylindrical valve body which is sealingly spring biased toward said inner bore and having a protrusion member extending into recess means of said head and being displaceable by a syringe needle being inserted into said inner bore for moving said valve means against said spring bias in a direction along the valve body axis which forms an angle in the range of greater than 90° up to less than 180° with the axis of the inner bore through which the syringe needle passes toward said recess means; a cylindrical guide means within the head for said valve body, said guide means ending in said recess means of said head, which recess means extends across and in communication with said inner bore and provides an annular sealing surface means; and said cylindrical protrusion member of the valve body supporting a sealing ring which, in the closed position of said valve means, is in sealing engagement with said sealing surface means; wherein said protrusion member extends into said recess means so that upon the introduction of a syringe needle its tip first impinges onto the front face of said protrusion member and displaces said valve body together with said sealing ring out of said recess means.
Claim 3
Dependent Claim
13 words
The head of claim 1, wherein the head is made of plastic material.
Claim 4
Dependent Claim
13 words
The head of claim 2, wherein the valve body is of plastic mateiral.
Claim 5
Dependent Claim
13 words
The head of claim 1, wherein the valve is made of plastic material.
Claim 6
Dependent Claim
15 words
The head of claim 1, wherein the protrusion member has clearance to said recess means.
Claim 7
Dependent Claim
32 words
The head of claim 1, wherein said guide means is threaded at the end portion adjacent to the exterior and closed by a plug means supporting a spring biasing said valve body.
Claim 8
Dependent Claim
28 words
The head of claim 1, wherein said guide means is closed to the exterior by a plug being supported by a plate secured to the inlet valve means.
Claim 9
Dependent Claim
15 words
The head of claim 1, wherein said guide means is a bore within the head.
Claim 10
Dependent Claim
72 words
The head of claim 1, wherein said head further comprises an introduction means having an opening to the exterior of the head in alignment with the inner bore and sized to accommodate a syringe needle therein; a sealing means between the introduction means and the inner bore for sealing the head from the exterior when a syringe needle is passed through the introduction means and the sealing means into the inner bore.