Abstract: A device for the needle-free injection of a fluid includes a first injector including a piston-cylinder arrangement in which a spring-pretensioned piston rod is guided by its front end in a cylinder for receiving the fluid to be injected. The cylinder opens into a nozzle at the front dispensing end via a first nonreturn valve. The cylinder with the first nonreturn valve and the nozzle form a releasable cylinder section in which a piston rod guide is arranged releasably at the end facing away from the nozzle. The piston rod guide includes a guide bushing to guide the piston rod and a fixing element connected to the guide bushing. In the installed state, the fixing element is fixed in the cylinder section. The fixing element has an engagement region for a tool, into which a tool can be inserted to release the fixing element from the cylinder section.

Abstract: A device for the needle-free injection of a fluid into an animal can include a contact device including a shaped contact surface that is shaped in conformity with a body part of the animal to which the injection is to be administered. Also included is a first injector including a front dispensing end which, during the needle-free injection, extends through a first passage opening in the shaped contact surface and protrudes in relation to the shaped contact surface in a region adjacent to the first passage opening, a first measuring device which outputs at least one first measuring signal in order to detect contact of the animal with the front dispensing end of the first injector, and a control unit which activates a needle-free injection via the first injector on the basis of the at least one first measuring signal.

Abstract: A device for administering a fluid can include a cylinder, a piston connected to a piston rod, and a tensioning device connected to the piston rod. The tensioning device includes a ramp which is rotatable via a motor, a ramp track, and a roller. A dose setting means can be provided which comprises a spacer and a movement unit. The spacer moves from a neutral position into an active position such that the driver is stopped by the spacer so the piston stroke during the movement of the piston to the open dispensing end is shorter in comparison to the case in which the spacer is in its neutral position. The spacer has a through bore in which a spindle with a spindle thread is guided. A pin protrudes into the spindle thread. The spindle thread leads at at least one of its two ends into an annular groove.

Abstract: A device for administering a fluid is provided, with a cylinder (16, 116) which has an open dispensing end (17), a piston (36) which is displaceable between a front and rear end position in the cylinder (16, 116) and is connected to a piston rod (35) that protrudes along a first direction beyond a rear end of the cylinder (16, 116) opposite the open dispensing end (17) and is guided in a receiving block (10), a nonreturn valve (18) closing the open dispensing end (17), and a tensioning device (S) which is connected to the piston rod (35, 135) and is arranged in the receiving block (10). The tensioning device (S) has a ramp (52) which is rotatable by means of a motor (12) and has a ramp track (53) extending along a helical line, wherein the ramp track (53) ascends from a first plateau along a region of inclination (S1, S2) to a second plateau and descends from the second plateau to the first plateau via a transition flank (46).

Abstract: A device for administering a fluid is provided, with a cylinder (16, 116) which has an open dispensing end (17), a piston (36) which is displaceable between a front and rear end position in the cylinder (16, 116) and is connected to a piston rod (35) that protrudes along a first direction beyond a rear end of the cylinder (16, 116) opposite the open dispensing end (17) and is guided in a receiving block (10), a nonreturn valve (18) closing the open dispensing end (17), and a tensioning device (S) which is connected to the piston rod (35, 135) and is arranged in the receiving block (10). The tensioning device (S) has a ramp (52) which is rotatable by means of a motor (12) and has a ramp track (53) extending along a helical line, wherein the ramp track (53) ascends from a first plateau along a region of inclination (S1, S2) to a second plateau and descends from the second plateau to the first plateau via a transition flank (46).

Abstract: A device for administering a fluid can include a cylinder, a piston connected to a piston rod, and a tensioning device connected to the piston rod. The tensioning device includes a ramp which is rotatable via a motor, a ramp track, and a roller which is in contact with the ramp track and which is mounted rotatably in a driver. The device can further include a front part, which includes the cylinder and the open dispensing end, and a rear part, which includes the tensioning device. The front part and the rear part can be formed from different materials.

Abstract: A device for administering a fluid can include a cylinder, a piston connected to a piston rod, and a tensioning device connected to the piston rod. The tensioning device includes a ramp which is rotatable via a motor, a ramp track, and a roller which is in contact with the ramp track and which is mounted rotatably in a driver. The driver can be connected to the piston rod via a joint. In a tensioning procedure, the ramp track is rotated such that the roller runs on the region of inclination as far as the second plateau and the piston is thereby moved to its rear end position. In a dispensing procedure, the ramp track is rotated until the roller runs over a transfer region and, on account of the tensioning, is accelerated toward the first plateau and, as a result, the piston is moved toward the an dispensing end.

Abstract: A device for administering a fluid can include a cylinder, a piston connected to a piston rod, and a tensioning device connected to the piston rod. The tensioning device includes a ramp which is rotatable via a motor, a ramp track, and a roller which is in contact with the ramp track and which is mounted rotatably in a driver. A dose setting means can be provided which comprises a spacer and a movement unit. The movement unit can move the spacer from a neutral position into an active position between the driver and the cylinder such that the driver is stopped by the spacer and therefore the piston stroke during the movement of the piston to the open dispensing end is shorter in comparison to the case in which the spacer is in its neutral position.

Abstract: A device for administering a fluid can include a cylinder, a piston displaceable in the cylinder and connected to a piston rod, and a tensioning device connected to the piston rod. The tensioning device includes a ramp rotatable via a motor, and a ramp track extending along a helical line. The tensioning device includes a roller which is in contact with the ramp track. To perform a tensioning procedure, the ramp track is rotated such that the roller runs on the region of inclination as far as the second plateau so the piston is moved to its rear end position. To perform a dispensing procedure, the ramp track is rotated until the roller runs over a transfer region and is accelerated toward the first plateau, thereby the piston is moved toward an open dispensing end. A control unit determines whether the tensioning procedure and/or dispensing procedure has taken place correctly.

Abstract: A device for administering a fluid can include a cylinder, a piston connected to a piston rod, and a tensioning device connected to the piston rod. The tensioning device includes a ramp which is rotatable via a motor, a ramp track, and a roller which is in contact with the ramp track and which is mounted rotatably in a driver. In a tensioning procedure, the ramp track is rotated until the roller runs over a transfer region and, on account of the tensioning, is accelerated toward the first plateau. As a result, the piston is moved toward an open dispensing end. The administering device can be configured with one cylinder, one piston and one piston rod. The tensioning device can include two helical screws which run parallel to each other and which both, when the piston is in its rear end position, contribute to the pretensioning which is present.

Abstract: A device for administering a fluid can include a cylinder, a piston connected to a piston rod, and a tensioning device connected to the piston rod. In a dispensing procedure a ramp track is rotated until the roller runs over a transfer region and is accelerated toward the first plateau and, as a result, the piston is moved toward an open dispensing end. A motor is connected to the ramp via a coupling. To rotate the ramp, the coupling transmits torque provided by the motor in the first rotation direction and, in the process, provides a freewheel counter to the first rotation direction. The freewheel is configured such that it covers at least a rotation angle range which corresponds to the transfer region.

Abstract: A device for administering a fluid can include a cylinder, a piston connected to a piston rod, and a tensioning device connected to the piston rod. In a dispensing procedure, a ramp track is rotated until a roller runs over a transfer region and is accelerated toward the first plateau and, as a result, the piston is moved toward an open dispensing end. The ramp track runs on the face side of a wall extending along a circular path. A cover engages over the ramp track, the driver and the roller and has at least one scraper extending counter to the first direction and extending within the wall as far as the inner side of the wall, and thus scrapes off lubricant located on the inner side from the inner side.

Abstract: A device for administering a fluid, wherein, with the valve opened, fluid that is to be administered can be brought through the feed channel into the cylinder, and wherein a movement of the piston counter to the first direction towards the open dispensing end generates a positive pressure in the cylinder, such that, with the first valve opened, the fluid that is to be administered from the cylinder is dispensed via the open dispensing end, wherein, in order to seal the rear end of the cylinder, a first sealing element is arranged between the piston and the cylinder and a second sealing element is arranged spaced apart from the first sealing element along the first direction. The first sealing element can be a single-acting sealing element, and the second sealing element can be a single-acting or double-acting sealing element.

Abstract: A device for administering a fluid is provided, with a cylinder (16, 116) which has an open dispensing end (17), a piston (36) which is displaceable between a front and rear end position in the cylinder (16, 116) and is connected to a piston rod (35) that protrudes along a first direction beyond a rear end of the cylinder (16, 116) opposite the open dispensing end (17) and is guided in a receiving block (10), a nonreturn valve (18) closing the open dispensing end (17), and a tensioning device (S) which is connected to the piston rod (35, 135) and is arranged in the receiving block (10), wherein the tensioning device (S), when the piston (36) is in its front end position, can move the piston rod (35, 135) in a tensioning operation along the first direction until the piston (36) is in its rear end position in order thereby to fill the cylinder (16, 116) with the fluid to be administered and in order to pretension the piston rod (35, 135) toward the open dispensing end (17), and wherein the tensioning device (S

Abstract: A device for administering a fluid is provided, with a cylinder (16, 116) which has an open dispensing end (17), a piston (36) which is displaceable between a front and rear end position in the cylinder (16, 116) and is connected to a piston rod (35) that protrudes along a first direction beyond a rear end of the cylinder (16, 116) opposite the open dispensing end (17) and is guided in a receiving block (10), a nonreturn valve (18) closing the open dispensing end (17), and a tensioning device (S) which is connected to the piston rod (35, 135) and is arranged in the receiving block (10). The tensioning device (S) has a ramp (52) which is rotatable by means of a motor (12) and has a ramp track (53) extending along a helical line, wherein the ramp track (53) ascends from a first plateau along a region of inclination (S1, S2) to a second plateau and descends from the second plateau to the first plateau via a transition flank (46).

Abstract: A device for administering a fluid is provided, with a cylinder (16, 116) which has an open dispensing end (17), a piston (36) which is displaceable between a front and rear end position in the cylinder (16, 116) and is connected to a piston rod (35) that protrudes along a first direction beyond a rear end of the cylinder (16, 116) opposite the open dispensing end (17) and is guided in a receiving block (10), a nonreturn valve (18) closing the open dispensing end (17), and a tensioning device (S) which is connected to the piston rod (35, 135) and is arranged in the receiving block (10), wherein the tensioning device (S), when the piston (36) is in its front end position, can move the piston rod (35, 135) in a tensioning operation along the first direction until the piston (36) is in its rear end position in order thereby to fill the cylinder (16, 116) with the fluid to be administered and in order to pretension the piston rod (35, 135) toward the open dispensing end (17), and wherein the tensioning device (S

Abstract: A device for administering a fluid is provided, with a cylinder (16, 116) which has an open dispensing end (17), a piston (36) which is displaceable between a front and rear end position in the cylinder (16, 116) and is connected to a piston rod (35) that protrudes along a first direction beyond a rear end of the cylinder (16, 116) opposite the open dispensing end (17) and is guided in a receiving block (10), a nonreturn valve (18) closing the open dispensing end (17), and a tensioning device (S) which is connected to the piston rod (35, 135) and is arranged in the receiving block (10).

Abstract: An injection device for administration of an injection to an animal can include a main body, which contains an injection instrument, a contact device, which has a contact area which is shaped in conformity with a body part of the animal to which the injection is to be administered. A support device which supports the contact device on the main body can be movable in a pressure application direction. A force measurement device including at least one force sensor can be designed to measure at last one force with which the contact device acts on the main body. A control device can activate the injection instrument if the force measured by the force measurement device lies in a specified range.

Abstract: A syringe includes a first syringe barrel and a second syringe barrel. Each barrel includes a delivery end to which an end piece with a channel is secured, a piston which is arranged movable in the syringe barrel and can be moved towards the delivery end in order to deliver a fluid located between the delivery end and the piston via the channel. The two syringe barrels are mechanically connected to each other such that the distance between them cannot be changed. At least one of the two end pieces can be secured to the allocated delivery end in different positions for adjustment of the distance between the two channels.