Valve block assembly for a bottle attachment apparatus

A bottle attachment apparatus for handling liquids, comprising:

• a cylinder-and-piston assembly for suctioning and exhausting
• liquid, a valve block assembly, and
• a fastening assembly for fastening the valve block assembly on a storage bottle,
• wherein the valve block assembly has a valve block, an intake valve insert and an exhaust valve insert,
• wherein the valve block has an intake valve receptacle which is assigned to the intake valve insert,
• wherein the valve block has an exhaust valve receptacle which is assigned to the exhaust valve insert,
• wherein the intake valve insert is inserted in a replaceable and sealing manner in the intake valve receptacle,
• wherein the exhaust valve insert is inserted in a replaceable and sealing manner in the exhaust valve receptacle,
• wherein the valve block has an intake duct which leads to a cylinder of the cylinder-and-piston assembly and connects the cylinder and the intake valve receptacle,
• wherein the valve block has an exhaust duct which leads to the cylinder of the cylinder-and-piston assembly and connects the cylinder and the exhaust valve receptacle,
• wherein the valve block and each valve insert, respectively, are composed of plastics which are suitable for autoclaving,
• wherein each valve insert has a stop surface portion, a fastening portion which is separated from the stop surface portion by an integral sealing surface portion which is distinct from both the stop portion and the fastening portion, the integral sealing surface portion extending peripherally around the valve insert adjacent to the stop portion and being planar when viewed in longitudinal cross section,
• wherein each valve receptacle has a stop surface portion, a fastening portion, and a sealing surface portion matching the stop surface portion, fastening portion, and sealing surface portion of the respective valve insert, and
• wherein the fastening portions of each valve insert and the respective valve receptacle, in an installed condition of the valve insert, are in force-transmitting mutual engagement with each other in such a manner that both the stop surface portions and the sealing surface portions are forced into direct abutment on one another.

A bottle attachment apparatus for handling liquids, comprising:

• a cylinder-and-piston assembly for suctioning and exhausting
• liquid, a valve block assembly, and
• a fastening assembly for fastening the valve block assembly on a storage bottle,
• wherein the valve block assembly has a valve block, an intake valve insert and an exhaust valve insert,
• wherein the valve block has an intake valve receptacle which is assigned to the intake valve insert,
• wherein the valve block has an exhaust valve receptacle which is assigned to the exhaust valve insert,
• wherein the intake valve insert is inserted in a replaceable and sealing manner in the intake valve receptacle,
• wherein the exhaust valve insert is inserted in a replaceable and sealing manner in the exhaust valve receptacle,
• wherein the valve block has an intake duct which leads to a cylinder of the cylinder-and-piston assembly and connects the cylinder and the intake valve receptacle,
• wherein the valve block and each valve insert, respectively, are composed of plastics which are suitable for autoclaving,
• wherein each valve insert and the respective valve receptacle define a longitudinal axis, wherein each valve insert has a fastening portion and an integral sealing surface portion which is distinct from the fastening portion, the integral sealing surface portion extending peripherally around the valve insert and extending at an acute angle in relation to said longitudinal axis,
• wherein each valve receptacle has a fastening portion and an integral sealing surface portion,
• wherein the integral sealing surface portion of each valve receptacle extends peripherally around the valve receptacle and extends at an acute angle in relation to said longitudinal axis and matching the fastening portion and sealing surface portion of the respective valve insert, wherein the fastening portion of each valve insert and the fastening portion of the respective valve receptacle, in an installed condition of the valve insert, are in force- transmitting mutual engagement with each other in such a manner that the sealing surface portion of each valve insert and the sealing surface portion of the respective valve receptacle are forced into direct abutment on one another, and
• wherein the sealing surface portion of each valve insert and the sealing surface portion of the respective valve receptacle are aligned at said acute angle in relation to the longitudinal axis.