# US 10,245,638 B2 · De-coring vibrator or pneumatic hammer for de-coring of foundry castings with integrated sensor

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- Number: US 10,245,638 B2
- Document ID: US10245638B2
- Status: Granted
- Kind: B2
- Application number: 15/317,607
- Filed: 2015-06-08
- Published: 2017-05-11
- Granted: 2019-04-02
- Earliest claimed: 2014-06-09
- Assignees: O.M.Ler 2000 S.R.L.
- Applicants: O.M.LER 2000 s.r.l.
- Inventors: Fabrizio Lerda
- Web page: https://patentgrep.com/patent/US10245638B2

## CPC

- B22D 29/005: {by vibrating or hammering}
- B25D 9/08: comprising a built-in air compressor {, i.e. the tool being driven by air pressure}
- B25D 17/00: Details of, or accessories for, portable power-driven percussive tools {(details or components, e.g. casings, bodies, of portable power-driven tools not particularly related to the operation performed B25F5/00)}
- B25D 2222/21: Metals
- B25D 2222/24: Aluminium
- B25D 2250/121: Housing details
- B25D 2250/221: Sensors
- B22D: CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES (shaping of plastics or substances in a plastic state B29C; metallurgical processing, selection of substances to be added to metal C21, C22)
- B25D: PERCUSSIVE TOOLS {(percussive machines for forging B21J; hand-held drilling machines, in general B23B45/00, for wood B27C3/08; drilling machines, used for mining or quarrying, with reciprocating tool which is turned intermittently when out of contact with the working face E21B1/00)}

## Abstract

A hammer includes a jacket having an inner chamber; an inlet circuit for the entry of compressed air, and an outlet circuit for the exit of compressed air. The hammer includes a motion mechanism, for generating vibratory motion under the action of compressed air; and a punch or beater, connected to the motion mechanism, for contacting the casting to be de-cored, forming a first end of the hammer. The hammer has a measurement circuit measuring the oscillation frequency of the motion circuit. The measurement circuit includes a sensor for measuring the oscillation frequency of the motion circuit; a processing circuit, enclosed in a protective casing, for receiving electric signals transmitted by the sensor, and a communication line for conducting electric signals from and/or to the measurement circuit. The jacket includes a housing formed in the outer surface of the jacket, such that it incorporating the measurement circuit protective casing.

## Claims

### Claim 1

A pneumatic hammer for de-coring of foundry castings; the hammer comprising:
a jacket comprising:
an inner chamber;
an inlet circuit for entry of compressed air; and
an outlet circuit for exit of said compressed air;
a motion mechanism, for generating a vibratory motion under action of said compressed air;
a punch or beater, connected to said motion mechanism, for coming into contact with a casting to be subjected to de-coring, forming a first end of the hammer;
a measurement circuit for measuring an oscillation frequency of the motion mechanism;
said measurement circuit comprises:
at least one sensor for measuring the oscillation frequency of the motion mechanism;
a processing circuit, enclosed in a protection casing, for receiving electric signals transmitted by said at least one sensor; and
a communication line for conducting electric signals from and/or to said measurement circuit;
said jacket comprises a housing formed in an outer surface of the jacket, such that the housing is shaped to incorporate the protection casing of the measurement circuit, and to maintain the protection casing of the measurement circuit within an outer profile of the jacket.

### Claim 2 (depends on 1)

The hammer according to claim 1, wherein said housing is formed in a portion of the jacket from which a connection flange extends.

### Claim 3 (depends on 2)

The hammer according to claim 2, wherein said housing is formed in a flat initial portion of the connection flange, where the flange begins to emerge from the profile of the jacket.

### Claim 4 (depends on 1)

The hammer according to claim 1, wherein said housing comprises at least one connection portion for connecting the measurement circuit to the hammer.

### Claim 5 (depends on 1)

The hammer according to claim 1, wherein, at said housing, the jacket comprises a measurement duct through which the measurement circuit can take a measurement for determining the oscillation frequency of the motion mechanism.

### Claim 6 (depends on 1)

The hammer according to claim 1, wherein, at said housing, the jacket comprises a channel through which the communication line can be laid.

### Claim 7 (depends on 1)

The hammer according to claim 1, wherein a shape of said housing is complementary to a shape of said protection casing of the measurement circuit.

### Claim 8 (depends on 1)

The hammer according to claim 1, wherein said housing has a shape suitable for receiving a parallelepiped protection casing, enveloping at least five faces of the protection casing of the measurement circuit.