Patent ID: 9339946
Filing Date: 2016-05-17
CPC Classification: B01F,B29B

Claim Text:
1. A device for automatic mixing of bone cement, the device comprises: a hollow cylinder having an interior space and a length defined between a first wall and a second wall; a plunger arranged within the interior space, wherein the plunger subdivides the interior space into a first plunger space section and a second plunger space section, wherein the plunger has a length defined between a first side and a second side, wherein the first side of the plunger is located adjacent to the first wall of the hollow cylinder and the second side of the plunger is located adjacent to the second wall of the hollow cylinder; a blocking organ extending through the plunger from the first side of the plunger to the second side of the plunger, wherein the blocking organ is switchable at a turnaround point of the plunger, and that, in an open state, the blocking organ connects the first plunger space section to the second plunger space section, and, in a closed state, the blocking organ separates the first and second plunger space sections in a gas-tight manner, wherein the blocking organ comprises a first pin and a second pin that control the blocking organ, wherein the first pin extends away from the first side of the plunger at an angle with respect to the first side of the plunger into the first plunger space section and the second pin extends away from the second side of the plunger at an angle with respect to the second side of the plunger into the second plunger space section; a gas outlet in the first plunger space section; an elastically restoring structural element arranged between the plunger and the first wall of the device, wherein the elastically restoring structural element, in its entirety, is located between the first side of the plunger and the first wall of the hollow cylinder and maintained within the first plunger space; and a gas feed in the second plunger space section.