Mini dropper

Claim 1

A device adapted to dispense reagents comprising an outer tubular member having an open end and a second end comprising an end wall having therein a concentric circular opening, a vial received in the open end of said tubular member having a resilient stopper sealing its open end, said stopper having an annular shoulder thereon to prevent reciprocation of said stopper in said vial, said stopper also having a projection thereon which is concentric with the stopper, a fluid passage through said stopper and projection, said projection extending through said concentric circular opening and beyond said end wall of the tubular member, said projection having an externally raised ring which forms a snap-fit on the exterior of the concentric circular opening to restrain the projection against longitudinal movement within the opening, said stopper also having an internally hollow, imperforate convex dome-like configuration in proximity to the inner end of said projection and extending beyond the end of said vial which is adapted to be compressed when said vial is fully advanced within said tubular member to expel a drop of fluid from said vial through said fluid passage.

Claim 2

A device adapted to dispense reagents comprising an outer tubular member having an open end and a second end comprising an end wall having therein a concentric circular opening, a vial received in the open end of said tubular member having a resilient stopper sealing its open end, said stopper having an annular shoulder thereon to prevent reciprocation of said stopper in said vial, said stopper also having a projection thereon which is concentric with the stopper, a fluid passage through said stopper and projection, said projection extending through said concentric circular opening and beyond said end wall of the tubular member, said projection having an externally raised ring which forms a snap-fit on the exterior of the concentric circular opening to restrain the projection against longitudinal movement within the opening, said stopper also having an internally hollow, imperforate convex dome-like configuration in proximity to the inner end of said projection and extending beyond the end of said vial which is adapted to be compressed when said vial is fully advanced within said tubular member to expel a drop of fluid from said vial through said fluid passage.

Claim 3

A device adapted to dispense reagents comprising an outer tubular member having an open end and a second end comprising an end wall having therein a concentric circular opening, a vial received in the open end of said tubular member having a resilient stopper sealing its open end, said stopper having an annular shoulder thereon to prevent reciprocation of said stopper in said vial, said stopper also having a projection thereon which is concentric with the stopper, a fluid passage through said stopper and projection, said projection extending through said concentric circular opening and beyond said end wall of the tubular member, said projection having an externally raised ring which forms a snap-fit on the exterior of the concentric circular opening to restrain the projection against longitudinal movement within the opening, said stopper also having an internally hollow, imperforate convex dome-like configuration in proximity to the inner end of said projection and extending beyond the end of said vial which is adapted to be compressed when said vial is fully advanced within said tubular member to expel a drop of fluid from said vial through said fluid passage, said tubular member having a skirt-like extension on its outer surface surrounding said projection, and a cap enclosing that part of said projection extending beyond said end wall, the exterior of said cap forming a seal with the interior of said skirt.

Claim 4

A device adapted to dispense reagents comprising an outer tubular member having an open end and a second end comprising an end wall having therein a concentric circular opening, a vial received in the open end of said tubular member having a resilient stopper sealing its open end, said stopper having an annular shoulder thereon to prevent reciprocation of said stopper in said vial, said stopper also having a projection thereon which is concentric with the stopper, a fluid passage through said stopper and projection, said projection extending through said concentric circular opening and beyond said end wall of the tubular member, said projection having an externally raised ring which forms a snap-fit on the exterior of the concentric circular opening to restrain the projection against longitudinal movement within the opening, said stopper also having an internally hollow, imperforate convex dome-like configuration in proximity to the inner end of said projection and extending beyond the end of said vial which is adapted to be compressed when said vial is fully advanced within said tubular member to expel a drop of fluid from said vial through said fluid passage, said tubular member having a skirt-like extension on its outer surface surrounding said projection, and a cap enclosing that part of said projection extending beyond said end wall, the exterior of said cap forming a seal with the interior of said skirt.

Claim 5

A device adapted to dispense reagents comprising an outer tubular member having an open end and a second end comprising an end wall having therein a concentric circular opening, a vial received in the open end of said tubular member having a resilient stopper sealing its open end, said stopper having an annular shoulder thereon to prevent reciprocation of said stopper in said vial, said stopper also having a projection thereon which is concentric with the stopper, a fluid passage through said stopper and projection, said projection extending through said concentric circular opening and beyond said end wall of the tubular member, said projection having an externally raised ring which forms a snap-fit on the exterior of the concentric circular opening to restrain the projection against longitudinal movement within the opening, said stopper also having an internally hollow, imperforate convex dome-like configuration in proximity to the inner end of said projection and extending beyond the end of said vial which is adapted to be compressed when said vial is fully advanced within said tubular member to expel a drop of fluid from said vial through said fluid passage, said tubular member having a skirt-like extension on its outer surface surrounding said projection, and a cap enclosing that part of said projection extending beyond said end wall, the exterior of said cap forming a seal with the inTerior of said skirt, said cap also having on the interior of its closed end, a projection thereon adapted to seal on the exterior of the end of said projection to thereby provide a two-part seal.

Claim 6

A device adapted to dispense reagents comprising an outer tubular member having an open end and a second end comprising an end wall having therein a concentric circular opening, a vial received in the open end of said tubular member having a resilient stopper sealing its open end, said stopper having an annular shoulder thereon to prevent reciprocation of said stopper in said vial, said stopper also having a projection thereon which is concentric with the stopper, a fluid passage through said stopper and projection, said projection extending through said concentric circular opening and beyond said end wall of the tubular member, said projection having an externally raised ring which forms a snap-fit on the exterior of the concentric circular opening to restrain the projection against longitudinal movement within the opening, said stopper also having an internally hollow, imperforate convex dome-like configuration in proximity to the inner end of said projection and extending beyond the end of said vial which is adapted to be compressed when said vial is fully advanced within said tubular member to expel a drop of fluid from said vial through said fluid passage, said tubular member having a skirt-like extension on its outer surface surrounding said projection, and a cap enclosing that part of said projection extending beyond said end wall, the exterior of said cap forming a seal with the inTerior of said skirt, said cap also having on the interior of its closed end, a projection thereon adapted to seal on the exterior of the end of said projection to thereby provide a two-part seal.

Claim 7

A device adapted to dispense reagents comprising an outer tubular member having an open end and a second end comprising an end wall having therein a concentric circular opening, a vial received in the open end of said tubular member having a resilient stopper sealing its open end, said stopper having an annular shoulder thereon to prevent reciprocation of said stopper in said vial, said annular shoulder having an external diameter of approximately equal to the internal diameter of said outer tubular member, said stopper also having a projection thereon which is concentric with the stopper, a fluid passage through said stopper and projection, said projection extending through said concentric circular opening and beyond said end wall of the tubular member, said projection having an externally raised ring which forms a snap-fit on the exterior of the concentric circular opening to restrain the projection against longitudinal movement within the opening, said stopper also having an internally hollow, imperforate convex dome-like configuration in proximity to the inner end of said projection and extending beyond the end of said vial which is adapted to be compressed when said vial is fully advanced within said tubular member to expel a drop of fluid from said vial through said fluid passage.

Claim 8

A device adapted to dispense reagents comprising an outer tubular member having an open end and a second end comprising an end wall having therein a concentric circular opening, a vial received in the open end of said tubular member having a resilient stopper sealing its open end, said stopper having an annular shoulder thereon to prevent reciprocation of said stopper in said vial, said annular shoulder having an external diameter of approximately equal to the internal diameter of said outer tubular member, said stopper also having a projection thereon which is concentric with the stopper, a fluid passage through said stopper and projection, said projection extending through said concentric circular opening and beyond said end wall of the tubular member, said projection having an externally raised ring which forms a snap-fit on the exterior of the concentric circular opening to restrain the projection against longitudinal movement within the opening, said stopper also having an internally hollow, imperforate convex dome-like configuration in proximity to the inner end of said projection and extending beyond the end of said vial which is adapted to be compressed when said vial is fully advanced within said tubular member to expel a drop of fluid from said vial through said fluid passage.

Claim 9

A device adapted to dispense reagents comprising an outer tubular member having an open end and a second end comprising an end wall having therein a concentric circular opening, a vial received in the open end of said tubular member having a resilient stopper sealing its open end, said stopper having an annular shoulder thereon to prevent reciprocation of said stopper in said vial, said annular shoulder having an external diameter of approximately equal to the internal diameter of said outer tubular member, said stopper also having a projection thereon which is concentric with the stopper, a fluid passage through said stopper and projection, said projection extending through said concentric circular opening and beyond said end wall of the tubular member, said projection having an externally raised ring which forms a snap-fit on the exterior of the concentric circular opening to restrain the projection against longitudinal movement within the opening, said stopper also having an internally hollow, imperforate convex dome-like configuration in proximity to the inner end of said projection and extending beyond the end of said vial which is adapted to be compressed when said vial is fully advanced within said tubular member to expel a drop of fluid from said vial through said fluid passage, said tubular member having a skirt-like extension on its outer surface surrounding said projection, and a cap enclosing that part of said projection extending beyond said end wall, the exterior of said cap forming a seal with the interior of said skirt.

Claim 10

A device adapted to dispense reagents comprising an outer tubular member having an open end and a second end comprising an end wall having therein a concentric circular opening, a vial received in the open end of said tubular member having a resilient stopper sealing its open end, said stopper having an annular shoulder thereon to prevent reciprocation of said stopper in said vial, said annular shoulder having an external diameter of approximately equal to the internal diameter of said outer tubular member, said stopper also having a projection thereon which is concentric with the stopper, a fluid passage through said stopper and projection, said projection extending through said concentric circular opening and beyond said end wall of the tubular member, said projection having an externally raised ring which forms a snap-fit on the exterior of the concentric circular opening to restrain the projection against longitudinal movement within the opening, said stopper also having an internally hollow, imperforate convex dome-like configuration in proximity to the inner end of said projection and extending beyond the end of said vial which is adapted to be compressed when said vial is fully advanced within said tubular member to expel a drop of fluid from said vial through said fluid passage, said tubular member having a skirt-like extension on its outer surface surrounding said projection, and a cap enclosing that part of said projection extending beyond said end wall, the exterior of said cap forming a seal with the interior of said skirt.

Claim 11

A device adapted to dispense reagents comprising an outer tubular member having an open end and a second end comprising an end wall having therein a concentric circular opening, a vial received in the open end of said tubular member having a resilient stopper sealing its open end, said stopper having an annular shoulder thereon to prevent reciprocation of said stopper in said vial, said annular shoulder having an external diameter of approximately equal to the internal diameter of said outer tubular member, said stopper also having a projection thereon which is concentric with the stopper, a fluid passage through said stopper and projection, said projection extending through said concentric circular opening and beyond said end wall of the tubular member, said projection having an externally raised ring which forms a snap-fit on the exterior of the concentric circular opening to restrain the projection against longitudinal movement within the opening, Said stopper also having an internally hollow, imperforate convex dome-like configuration in proximity to the inner end of said projection and extending beyond the end of said vial which is adapted to be compressed when said vial is fully advanced within said tubular member to expel a drop of fluid from said vial through said fluid passage, said tubular member having a skirt-like extension on its outer surface surrounding said projection, and a cap enclosing that part of said projection extending beyond said end wall, the exterior of said cap forming a seal with the interior of said skirt, said cap also having on the interior of its closed end, a projection thereon adapted to seal on the exterior of the end of said projection to thereby provide a two-point seal.

Claim 12

A device adapted to dispense reagents comprising an outer tubular member having an open end and a second end comprising an end wall having therein a concentric circular opening, a vial received in the open end of said tubular member having a resilient stopper sealing its open end, said stopper having an annular shoulder thereon to prevent reciprocation of said stopper in said vial, said annular shoulder having an external diameter of approximately equal to the internal diameter of said outer tubular member, said stopper also having a projection thereon which is concentric with the stopper, a fluid passage through said stopper and projection, said projection extending through said concentric circular opening and beyond said end wall of the tubular member, said projection having an externally raised ring which forms a snap-fit on the exterior of the concentric circular opening to restrain the projection against longitudinal movement within the opening, Said stopper also having an internally hollow, imperforate convex dome-like configuration in proximity to the inner end of said projection and extending beyond the end of said vial which is adapted to be compressed when said vial is fully advanced within said tubular member to expel a drop of fluid from said vial through said fluid passage, said tubular member having a skirt-like extension on its outer surface surrounding said projection, and a cap enclosing that part of said projection extending beyond said end wall, the exterior of said cap forming a seal with the interior of said skirt, said cap also having on the interior of its closed end, a projection thereon adapted to seal on the exterior of the end of said projection to thereby provide a two-point seal.

Claim 13

A device adapted to dispense reagents comprising an outer tubular member having an open end and a second end comprising an end wall having therein a concentric circular opening, a vial received in the open end of said tubular member having a resilient stopper sealing its open end, said stopper having an annular shoulder thereon to prevent reciprocation of said stopper in said vial, said annular shoulder having an external diameter of approximately equal to the internal diameter of said outer tubular member, the underside of said annular shoulder resting on the open end of said vial, said stopper also having a projection thereon which is concentric with the stopper, a fluid passage through said stopper and projection, said projection extending through said concentric circular opening and beyond said end wall of the tubular member, said projection having an externally raised ring which forms a snap-fit on the exterior of the concentric circular opening to restrain the projection against longitudinal movement within the opening, said stopper also having an internally hollow, imperforate convex dome-like configuration in proximity to the inner end of said projection and extending beyond the end of said vial which is adapted to be compressed when said vial is fully advanced within said tubular member to expel a drop of fluid from said vial through said fluid passage.

Claim 14

A device adapted to dispense reagents comprising an outer tubular member having an open end and a second end comprising an end wall having therein a concentric circular opening, a vial received in the open end of said tubular member having a resilient stopper sealing its open end, said stopper having an annular shoulder thereon to prevent reciprocation of said stopper in said vial, said annular shoulder having an external diameter of approximately equal to the internal diameter of said outer tubular member, the underside of said annular shoulder resting on the open end of said vial, said stopper also having a projection thereon which is concentric with the stopper, a fluid passage through said stopper and projection, said projection extending through said concentric circular opening and beyond said end wall of the tubular member, said projection having an externally raised ring which forms a snap-fit on the exterior of the concentric circular opening to restrain the projection against longitudinal movement within the opening, said stopper also having an internally hollow, imperforate convex dome-like configuration in proximity to the inner end of said projection and extending beyond the end of said vial which is adapted to be compressed when said vial is fully advanced within said tubular member to expel a drop of fluid from said vial through said fluid passage.