X-ray or gamma ray systems or devices – Accessory – Object holder or support
Reexamination Certificate
1998-12-16
2001-06-12
Kim, Robert H. (Department: 2882)
X-ray or gamma ray systems or devices
Accessory
Object holder or support
C005S601000
Reexamination Certificate
active
06244745
ABSTRACT:
FIELD OF THE INVENTION
The invention relates to a device for moving an X-ray table or the like.
BACKGROUND OF THE INVENTION
The “UROMAT 2000” X-ray machine is known from the “UROMAT 2000” brochure from the company of Hans Pausch Röntgengerätebau GmbH+Co., 91056 Erlangen, which appeared in October 1996. In the known X-ray machine, a device is provided which can be moved vertically via a motor by means of a gear unit. The device has a further motor for pivoting an X-ray table held thereon. The known device is expensive to produce. It requires, for example, the provision of a gear unit.
BRIEF SUMMARY OF THE INVENTION
It is the object of the invention to specify a device, which can be produced as simply and cost-effectively as possible, for moving an X-ray table or the like.
This object is achieved by means of the features of claim
1
. Expedient developments of the invention follow from the features of claims
2
to
13
.
According to the invention, a device is provided for moving an X-ray table or the like, it being the case that a rotation means engages with a first actuator of a first linear motive unit, and with a second actuator, which can move parallel thereto, of a second linear motive unit, and that it is possible to rotate the rotation means through a different speed of movement and/or direction of movement of the first actuator and second actuator. The device is of simple construction. There is no longer any need for a gear.
According to one embodiment feature, the axis of rotation of the rotation means is essentially perpendicular to the direction of movement of the actuators. The rotation means can be moved linearly in the same speed of movement and direction of movement of the actuators. If the actuators can be moved vertically, the rotation means can be moved up and down vertically in a simple way.
In an expedient way, the first linear motive unit has a first sliding block engaging in the thread of a first driven screw, and the second linear motive unit has a second sliding block engaging in the thread of a second driven screw. The rotation means can have an axle on whose one end a crosshead is provided. In an expedient way, the first sliding block is displaceably held in a first slideway provided at a first end of the crosshead, and the second sliding block is displaceably held in a second slideway provided at the second end of the crosshead. This permits a rotary movement of the crosshead in conjunction with a different speed of movement and/or direction of movement of the first and second actuators. This embodiment has the advantage of being self inhibiting, that is to say any further movement is stopped in the event of a power failure.
It is possible to provide at the other end of the axle a means, in particular a flange, for fastening an X-ray table, X-ray table support or the like. In order in the case of a horizontal arrangement of the axle to absorb the tilting moment caused by the weight of an X-ray table or X-ray table support fastened thereto, the axle is advantageously mounted in a linearly displaceable carriage. The carriage is expediently held on two parallel vertical frame uprights.
In order to permit movement of the X-ray table into a prescribed position, it is expediently the case that the first sliding block and/or the second sliding block is/are provided with a displacement sensor, with the result that the position and/or the angle of rotation of the axle can be determined. Furthermore, it is the case that a control element which can be actuated by the first or second sliding block can be provided at least at one of the ends, averted from the axle, of the slideways. As a result, the rotary movement of the axle can be stopped automatically.
According to a further embodiment feature, it is the case that, with the X-ray table perpendicular to the screws, the crosshead forms an angle of 25 to 40°, preferably of 35°, with respect to an X-ray table plane. As a result, the rotary movement of the X-ray table can be adapted to the practical requirements. The X-ray table can, in an expedient way, be held in a movable fashion in the X-ray table plane on an X-ray table support.
The following discussion relates to an embodiment feature which is to be regarded as a further invention both in combination with the abovementioned invention and per se. An X-ray image intensifier can be included in the X-ray table support. The X-ray image intensifier is provided in the vicinity of one transverse side of the X-ray table support. This permits a particularly simple transillumination of the patient when the latter is seated in the vicinity of one transverse side of the X-ray table support. The particularly advantageous arrangement of the X-ray image intensifier is permitted by virtue of the fact that a film cassette holder can be moved in the X-ray table support parallel to the longitudinal side thereof. An opening for loading and unloading of the film cassette holder is located in the vicinity of the other transverse side on the front longitudinal side of the X-ray table support.
REFERENCES:
patent: 4912754 (1990-03-01), Van Steenburg
patent: 5014292 (1991-05-01), Siczek et al.
patent: 5048071 (1991-09-01), Van Steenburg
patent: 5528782 (1996-06-01), Pfeuffer et al.
Dunn Drew A.
Hans Pausch Rontgengeratebau GmbH & Co.
Kim Robert H.
Pearne & Gordon LLP
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