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US 2008/0257652 A1Published application
Lifting Ram For Lifting Platforms
OwnerRoland Hoernsteininventor
Life of this patent
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Abstract
The invention relates to a lifting ram for lifting platforms, in particular for underfloor lifting platforms, comprising an inner tubular body (4) and an outer body (3) which is at least partially tubular and which at least partially surrounds the inner tubular body (4), wherein the outer tubular body (3) and the inner tubular body (4) are connected to one another at least in a force-fitting manner via connecting elements (5a, 5b). The lifting ram is an extruded element at least in some sections.
Claims23
1:
- A lifting ram for lifting platforms, in particular for underfloor lifting platforms, comprising an inner tubular body and an outer body which is at least partially tubular and which at least partially surrounds the inner tubular body, wherein the outer tubular body and the inner tubular body are connected to one another at least in a force-fitting manner via connecting elements, and wherein the lifting ram is an element which is extruded at least in some sections.
2:
- The lifting ram according to claim 1, wherein the outer tubular body and the inner tubular body are formed as one piece.
3:
- The lifting ram according to claim 1, wherein the entire lifting ram is an extruded element.
4:
- The lifting ram according to claim 1, wherein a thread is arranged in at least one end section of the lifting ram.
5:
- The lifting ram according to claim 1, wherein the inner tubular body is suitable for accommodating a piston element and in particular a hydraulic cylinder.
6:
- The lifting ram according to claim 1, wherein a covering element is arranged at the upper end of the lifting ram, which covering element covers the lifting ram in an essentially gastight manner.
7:
- The lifting ram according to claim 6, wherein a closable opening is arranged in the covering element.
8:
- The lifting ram according to claim 1, wherein the inner tubular body has at least one essentially circumferential groove, preferably a plurality of circumferential grooves, on its inner circumference in a lower region.
9:
- The lifting ram according to claim 8, wherein an opening is provided in the inner tube above the grooves.
10:
- The lifting ram according to claim 1, wherein at least one connecting element has a cavity extending in the longitudinal direction L of the lifting ram.
11:
- The lifting ram according to claim 10, wherein at least one cavity has an essentially circular profile.
12:
- The lifting ram according to claim 1, wherein the connecting elements are formed in the manner of webs.
13:
- The lifting ram according to claim 1, wherein the connecting elements are spaced apart from one another in the circumferential direction.
14:
- The lifting ram according to claim 1, wherein the outer tubular body has a smaller length than the inner tubular body.
15:
- The lifting ram according to claim 1, wherein the lifting ram has an outer cross section selected from a group of cross sections comprising circular cross sections, elliptical cross sections, polygonal cross sections, in particular rectangular cross sections, combinations thereof and the like.
16:
- The lifting device comprising a lifting ram according to claim 1.
17:
- The lifting device according to claim 16, wherein the lifting ram is arranged in a guide device at least in some sections.
18:
- The lifting device according to claim 16, wherein a hydraulic cylinder is arranged in the inner tubular body.
19:
- The lifting device according to claim 16, wherein sealing elements are arranged in the circumferential grooves of the inner tubular body.
20:
- The lifting device according to claim 16, wherein guide elements are arranged in the circumferential grooves of the inner tubular body.
21:
- A lifting platform comprising at least one lifting device according to claim 16.
22:
- A lifting platform according to claim 21, wherein a load handling device is arranged on at least one lifting device.
23:
- A method for producing a lifting ram, in particular a lifting ram for lifting platforms, wherein the lifting ram is produced at least partially by an extrusion process.