# US 5,708,208 A · Testing head for the ultrasonic testing of a built-in polygonal socket screw

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- Number: US 5,708,208 A
- Document ID: US5708208A
- Status: Granted
- Kind: A
- Application number: 08/616,218
- Filed: 1996-03-15
- Granted: 1998-01-13
- Earliest claimed: 1995-03-15
- Assignees: ABB Reaktor GmbH
- Inventors: Frank Bonitz
- Web page: https://patentgrep.com/patent/US5708208A

## CPC

- G01N 29/223: {Supports, positioning or alignment in fixed situation (mounting transducers per se G10K11/004)}
- G01N 2291/044: Internal reflections (echoes), e.g. on walls or defects
- G01N 2291/2691: Bolts, screws, heads
- 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 testing head is provided which operates in accordance with the contact technique and has a flexibly constructed adaptor piece that is adapted to an intended contour of the conical bottom surface. A ring structure, which is disposed on the base surface of the adaptor piece, is constructed as a one-piece or multiple-piece ultrasonic transducer.

## Claims

### Claim 1

A testing head for the ultrasonic testing of a built-in polygonal socket screw having a polygonal socket with a bottom surface and an outer surface, the testing head comprising:
an accommodation part having a side facing away from the bottom surface, said accommodation part being an adaptor piece formed of a flexible material with an intended contour of the bottom surface, said adaptor piece having a periphery spaced apart from the outer surface of the polygonal socket defining a free space therebetween; and
at least one ultrasonic transducer being constructed as a continuous ring and being disposed on said side of said accommodation part facing away from the bottom surface.

### Claim 2 (depends on 1)

The testing head according to claim 1, wherein said adaptor piece has a side facing said bottom surface and being partly constructed to be sound-absorbing.

### Claim 3 (depends on 1)

The testing head according to claim 1, wherein said side of said adaptor piece facing away from the bottom surface of the polygonal socket is a planar base surface.

### Claim 4 (depends on 1)

The testing head according to claim 1, wherein said side of said adaptor piece facing away from the bottom surface of the polygonal socket is a conical base surface.

### Claim 5 (depends on 1)

The testing head according to claim 1, wherein said ring is a ring structure formed of individual ultrasonic transducers, and said ultrasonic transducers are selectively operable all together, as a group or individually.