Injector for medical uses
First Claim
1. In an injector for medical uses including an elongated housing containing a spindle drive having a threaded spindle, a first holder mounted on said housing for attachment to one part of a syringe, a slide movably mounted to said housing for linear motion relative to the direction of elongation of said housing, a motor for driving said slide via said spindle drive, a second holder mounted on said slide for attachment to the other part of the syringe, and means for interrupting the transmission of force from said motor, the improvement comprising:
- said spindle drive includes a ball gear comprising a nut surrounding said threaded spindle wherein said nut is in engagement with the threads of said spindle through balls; and
coupling means for non-rotationally coupling said spindle with said slide in at least one direction of rotation of said spindle.
2 Assignments
0 Petitions
Accused Products
Abstract
An injector for squeezing liquid from a medical syringe is disclosed. On a housing (10), a first holder is (11) fastened. A first end of a syringe cylinder is joined to the first holder (11). The syringe piston (15) is joined to a second holder (13). The second holder (13) is fastened to a slide (12) which is displaceable relative to the housing (10). The drive of the slide (12) is effected by way of a pipe (26) and a ball gear (27, 28) on a spindle (28). The end of the spindle (28) is connected with the slide (12) through a free-wheeling mechanism. The spindle (28) can be rotated by hand with a rotary button (30). When the free-wheeling mechanism is released, the slide (12) can be pulled linearly into a desired position. The ball gear drive mechanism (27, 28) ensures that when the motor is turned on, the slide (12) is driven at once without first requiring an engagement of a tooth system or a screwthread.
18 Citations
9 Claims
-
1. In an injector for medical uses including an elongated housing containing a spindle drive having a threaded spindle, a first holder mounted on said housing for attachment to one part of a syringe, a slide movably mounted to said housing for linear motion relative to the direction of elongation of said housing, a motor for driving said slide via said spindle drive, a second holder mounted on said slide for attachment to the other part of the syringe, and means for interrupting the transmission of force from said motor, the improvement comprising:
-
said spindle drive includes a ball gear comprising a nut surrounding said threaded spindle wherein said nut is in engagement with the threads of said spindle through balls; and coupling means for non-rotationally coupling said spindle with said slide in at least one direction of rotation of said spindle. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. In an injector for medical uses including an elongated housing containing a spindle drive having a threaded spindle, a first holder mounted on said housing for attachment to one part of a syringe, a slide movably mounted to said housing for linear motion relative to the direction of elongation of said housing, a motor for driving said slide via said spindle drive, a second holder mounted on said slide for attachment to the other part of the syringe, and means for interrupting the transmission of force from said motor, the improvement comprising:
-
said spindle drive includes a ball gear comprising a nut surrounding said threaded spindle wherein said nut is in engagement with the threads of said spindle through balls; and coupling means for non-rotationally coupling said nut with said slide in at least one direction of rotation of said nut. - View Dependent Claims (9)
-
Specification