| 摘要 |
Dispensing device for cement cartridges for polymethylmethacrylate bone cements comprising at least one manually actuatable rocker lever, an adapter for a cement cartridge, a clamping rod that can be propelled in the direction of the adapter, at least one propulsion body shiftable in axial direction with respect to the axis of the clamping rod, at least one sphere-shaped or roller-shaped clamping body arranged in a cavity of the at least one propulsion body, an elastic element which pushes the at least one clamping body of the at least one propulsion body from the direction of the adapter onto an inclined surface or edge of the cavity of the at least one propulsion body, a spring element which pushes onto the at least one propulsion body opposite to the propulsion direction of the clamping rod, and at least one securing element which touches against the clamping rod. |
| 主权项 |
1. Dispensing device (1) for cement cartridges for polymethylmethacrylate bone cements comprising at least one manually actuatable rocker lever (4), an adapter (44) for a cement cartridge, and a clamping rod (2) that can be propelled in the direction of the adapter (44),
whereby at least one propulsion body (24) is arranged to be touching against the clamping rod (2) and is shiftable in axial direction with respect to the axis of the clamping rod (2), whereby the at least one propulsion body (24) touching against the clamping rod (2) forms at least one cavity together with the clamping rod (2), whereby the cavity comprises a surface or edge that is inclined in the propulsion direction of the clamping rod (2) such that the cavity widens in the direction of the adapter in the region of said surface or edge, whereby at least one sphere-shaped or roller-shaped clamping body (26) is arranged in the cavity of the at least one propulsion body (24), whereby the at least one clamping body (26) of the at least one propulsion body (24) touches the clamping rod (2) in at least one spot or along a line, whereby an elastic element (2852) pushes the at least one clamping body (26) of the at least one propulsion body (24) from the direction of the adapter (44) onto the inclined surface or edge of the cavity of the at least one propulsion body (24), whereby the rocker lever (4) is supported as in a bearing such that it can rotate with respect to the clamping rod (2), such that, upon actuation of the rocker lever (4), an end (8) of the rocker lever (4) pushes onto the at least one axially shiftable propulsion body (24) in propulsion direction of the clamping rod (2), whereby a spring element (40) pushes onto the at least one propulsion body (24) opposite to the propulsion direction of the clamping rod (2), at least one securing element (34) touches against the clamping rod (2) against which the propulsion body (24) is supported such as to be mobile, whereby the at least one securing element (34) touching against the clamping rod (2) forms at least one cavity together with the clamping rod (2), whereby the cavity comprises a surface or edge that is inclined with respect to the propulsion direction of the clamping rod (2) such that the cavity widens in the direction of the adapter (44) in the region of said surface or edge, whereby at least one sphere-shaped or roller-shaped clamping body (36) is arranged in the cavity of the at least one securing element (34), whereby the at least one clamping body (36) of the at least one securing element (34) touches the clamping rod (2) in at least one spot or along a line, whereby an elastic element (38, 50) pushes the at least one clamping body (36) of the at least one securing element (34) from the direction of the adapter (44) onto the inclined surface or edge of the cavity of the at least one securing element (34). |
