# US 2014/0190320 A1 · Wrench for providing a fixed adjustable maximum torque

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- Number: US 2014/0190320 A1
- Document ID: US20140190320A1
- Status: Published application
- Kind: A1
- Application number: 14/152,483
- Filed: 2014-01-10
- Published: 2014-07-10
- Earliest claimed: 2008-11-14
- Assignees: Biotechnology Institute, I Mas D, S.L.
- Applicants: Biotechnology Institute, I Mas D, S.L.
- Inventors: Eduardo ANITUA ALDECOA
- Web page: https://patentgrep.com/patent/US20140190320A1

## CPC

- B25B 23/1427: {by mechanical means}
- B25B 13/463: {a pawl engaging an externally toothed wheel}
- B25B: TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING

## Abstract

Wrench (1) for providing a maximum torque to an external part, characterised in that it comprises at least one elongated metal part (3) provided with a fixed end (4) and a pusher end (5), and which also comprises a torque-applying head (6) upon which the pusher end (5) acts, wherein the elongated metal part (3) is capable of bending when a torque is applied with the wrench, and wherein the elongated metal part (3) reaches a maximum bending point that determines the maximum torque provided by the wrench (1). The inventive wrench (1) is easier to use than conventional spring-based wrenches as the force required to adjust the torque is minimal and independent of the torque value to which the wrench is adjusted. It is also capable of providing higher torque values.

## Claims

### Claim 1

Wrench (1) for providing a maximum torque to an external part, comprising:
at least one elongated metal part (3) provided with a fixed end (4) and a pusher end (5),
a torque-applying head (6) upon which the pusher end (5) acts, and
means for selecting the bending length of the elongated metal part (3) and, as a result, for varying the maximum torque provided by the wrench (1),
wherein the elongated metal part (3) is capable of bending when torque is applied with the wrench, and wherein the elongated metal part (3) reaches a maximum bending point that determines the maximum torque provided by the wrench (1).

### Claim 2 (depends on 1)

Wrench (1), according to claim 1, further comprising a moving cover (13) that is engaged with the bolt (12) and which causes said bolt (12) to move.

### Claim 3 (depends on 2)

Wrench (1), according to claim 2, wherein the moving cover (13) presents a helicoidal groove (14) in which the bolt (12) moves, with the result that a rotation of the moving cover (13) causes the bolt (12) to move axially.

### Claim 4 (depends on 3)

Wrench (1), according to claim 3, wherein the helicoidal groove (14) presents a fixed pitch.

### Claim 5 (depends on 3)

Wrench (1), according to claim 3, wherein the helicoidal groove (14) presents a variable pitch.