# US 9,274,035 B2 · Clamping device

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- Number: US 9,274,035 B2
- Document ID: US9274035B2
- Status: Granted
- Kind: B2
- Application number: 13/746,367
- Filed: 2013-01-22
- Published: 2013-08-08
- Granted: 2016-03-01
- Earliest claimed: 2012-01-23
- Assignees: Siemens Aktiengesellschaft
- Applicants: Eva Hanswillemenke; Michael Ott
- Inventors: Hans Hanswillemenke; Michael Ott
- Web page: https://patentgrep.com/patent/US9274035B2

## CPC

- G01N 3/02: Details
- G01N 3/04: Chucks
- G01N 2203/0282: Two dimensional, e.g. tapes, webs, sheets, strips, disks or membranes
- G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q)

## Abstract

A clamping device for clamping a flat material test sample while a material test is carried out is provided. The clamping device includes a substantially cylindrical clamping part, from the free end of which there extends a receiving slot for receiving the material test sample, a pressure ring surrounding the clamping part in the region of the receiving slot, and a pressure sleeve provided between the clamping part and the pressure ring, the pressure sleeve is formed and actuable such that, under radial expansion, it connects the clamping part and the pressure ring together and clamps the material test sample held in the receiving slot.

## Claims

### Claim 1

A clamping device for clamping a flat material test sample while a material test is carried out, comprising:
a substantially cylindrical clamping part, from the free end of which there extends a receiving slot for receiving the material test sample;
a pressure ring concentrically surrounding the clamping part in the region of the receiving slot; and
a pressure sleeve provided between the clamping part and the pressure ring such that the pressure sleeve is concentric with the clamping part and the pressure ring in the region of the receiving slot, the pressure sleeve is formed and actuable such that, under radial expansion, it connects the clamping part and the pressure ring together and clamps the material test sample held in the receiving slot.

### Claim 2 (depends on 1)

The clamping device as claimed in claim 1,
wherein the receiving slot is widened at a slot base, and
wherein the widening has a circular cross section.

### Claim 3 (depends on 2)

The clamping device as claimed in claim 2, wherein the outside diameter of the clamping part has a groove in the region of the slot base of the receiving slot.

### Claim 4 (depends on 3)

The clamping device as claimed in claim 3, wherein the outside diameter of the clamping part has two grooves located opposite one another, which are arranged at the same distance from the receiving slot.

### Claim 5 (depends on 1)

The clamping device as claimed in claim 1, wherein the clamping part has at its other free end a fastening section for arranging the clamping part on a material testing machine.

### Claim 6 (depends on 5)

The clamping device as claimed in claim 5, wherein the fastening section of the clamping part is provided with a thread which is brought into engagement with a correspondingly formed mating thread on the material testing machine.

### Claim 7 (depends on 1)

The clamping device as claimed in claim 1, wherein the pressure ring is in the form of a solid component.

### Claim 8 (depends on 1)

The clamping device as claimed in claim 1, wherein there is provided a cooling collar through which a coolant flows and which surrounds the pressure ring.

### Claim 9 (depends on 1)

The clamping device as claimed in claim 1, wherein a thermal insulator is provided on an end side of the clamping device, the thermal insulator is formed in a plate-like manner.

### Claim 10 (depends on 1)

The clamping device as claimed in claim 1, wherein a thermal insulator is provided on an end side of the clamping device, the thermal insulator is produced from ceramic material.

### Claim 11

A material testing machine, comprising:
two clamping devices, each clamping device, comprising:
a substantially cylindrical clamping part, from the free end of which there extends a receiving slot for receiving the material test sample;
a pressure ring concentrically surrounding the clamping part in the region of the receiving slot; and
a pressure sleeve provided between the clamping part and the pressure ring such that the pressure sleeve is concentric with the clamping part and the pressure ring in the region of the receiving slot, the pressure sleeve is formed and actuable such that, under radial expansion, it connects the clamping part and the pressure ring together and clamps the material test sample held in the receiving slot,
wherein the two clamping devices are arranged opposite one another such that the free ends of a flat material test sample are receivable in their receiving slots and the material test sample may be clamped.