| 摘要 |
The invention relates to a rotary valve body for a bone cement dispensing device that can be arranged in rotatable manner in a matching valve seat in the dispensing device, whereby the rotary valve body is rotationally symmetrical about the rotation axis of the rotary valve body at least within a region intended for the valve seat, and in that at least one sealing cam made of an elastic plastic material is arranged on the rotationally symmetrical jacket surface of said region and is raised above the radius of the rotationally symmetrical jacket surface such that the sealing cam renders the circumference of the rotary valve body larger than the internal diameter of the valve seat, and whereby at least one feed-through is arranged in the rotary valve body and extends from a first opening in the rotationally symmetrical jacket surface of the rotary valve body in the region of the sealing cam into a second opening in the rotationally symmetrical jacket surface of the rotary valve body. The invention also relates to a valve system comprising a rotary valve body of this type and a valve seat, in which the rotary valve body is supported like in a bearing such that it can rotate, whereby the sealing cam or sealing cams of the rotary valve body are compressed by the valve seat. And lastly, the invention also relates to a medical dispensing device for single-use, in particular pressurised gas-driven medical bone cement dispensing device, spraying device or vacuum-generating device having a valve system of this type for regulating the gas flow. |
