FR2790217A1 - Locking dowel for motor vehicle hydraulic valve has marker attached to spring loaded head in dowel to contact fixing when valve is assembled - Google Patents

Abstract

The locking dowel (10) for a motor vehicle hydraulic valve has a marker (12) which contacts a fixing to be locked (13). The marker head is axially movable in the dowel and has an imprint (14) co-operating with the fixing. At rear the marker are axially spring (22) biased to a position in which it is extended into the imprint into contact the fixing when the imprint co-operates with the fixing.

Description

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SOCKET WITH INK RESERVOIR.

  The present invention relates to a clamping tool capable of ensuring, by a marking means, in particular of the paint or ink type, a clamping with

  torque in particular in automotive assembly operations.

  From document DE-A-2 530 077 and with reference to its FIG. 1, there is known a torque key having a locking mechanism which, when the torque

  desired is reached, produces a relative movement which acts on a valve.

  Said valve has a pressure line, connecting the paint marking device located at the head of the key to the compression chamber. At the same time, the paint marking device is

  advanced towards bolt assembly.

  The paint marking device described in this document consists of a felt tip actuated axially by a cylinder. The felt tip located in the head of the key is easily replaced. The part

  sleeve houses the compression chamber.

  The present invention relates to a portable tool of greater simplicity making it possible to visually guarantee that a tightening operation has

  well done, the marking being done instantly.

  The present invention will now be described in these characteristics and advantages with reference to the accompanying drawings in which: - Figure I shows an axial section illustrating the tightening tool according to the invention before tightening, and

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  - Figure 2 shows an axial section illustrating the clamping tool

  according to the invention after tightening.

  The present invention relates more specifically to a clamping tool, comprising, with reference to Figures 1 and 2, a clamping sleeve 10 comprising marking means 12 which come into contact with a fixing means to be clamped 13, the means marking being axially movable in said socket, the latter comprising a front imprint 14 adapted to cooperate with the fixing means, such as a screw / stud system for example, characterized in that at rest the marking means are axially biased by elastic means, towards an advanced position in which they extend in said imprint, so as to come into contact with the means

  fixing when the impression cooperates with the fixing means.

  Preferably, in service, in contact with the fastening means, said means for marking the tightening tool according to the invention recede axially in

compressing the elastic means.

  Advantageously, the socket of the tightening tool according to the invention

  comprises a reservoir 16 containing marking liquid.

  According to a preferred embodiment of the tightening tool according to the invention, the marking means comprise a pad 18 held in a sliding guide 20, the guide being urged forward by a spring 22 until it comes to bear against a retaining ring 24. Said retaining ring serves in particular to retain the thrust of the spring, to promote sliding in the

  sleeve, and to wrap the guide 20 fitted with the buffer 18.

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  Even more preferably, said guide 20 has a shoulder 21 capable of cooperating with the retaining ring 24 to ensure sealing in

closed / off position.

  The tightening tool according to the invention also has the following advantages as well as the following complementary and / or alternative characteristics: - The cavity 14 is formed in a nozzle attached to the front of the socket, for example, if it must be extended. In the case of a

  long socket, in general, the imprint is an integral part of it.

  - The socket 10 is advantageously hexagonal.

  - The end of the tank 16 can be made versatile depending on

  the size of the sockets you wish to use.

  - The retaining ring 24 is force fitted into the tank 16.

  This embodiment aims to guarantee the spring in the final position and the felt, in the case where the pad 18 is represented by a felt, in abutment, at the bottom of the sliding guide 20. Thus the change of the felt can be advantageously by the hexagonal imprint of the sleeve without intervening inside. Therefore the whole mechanism

  interior is in place for life of the socket.

  - The pad 18 is in the form of a foam, of appropriate texture or alternatively in the form of a felt, impregnated with ink for example. In all cases, the diameter of the buffer 18 is preferably

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  less than the diameter of the fixing means shown as already

  mentioned, for example, by a screw / stud system.

  - The tightness of the tightening tool according to the invention is ensured, on the one hand, by the thrust of the spring on the sliding guide 20, itself bearing on the retaining ring, and on the other hand , by the texture of the

foam or felt.

  - The rear of the socket 10 comprises a receiving square 26 intended to receive a square driving a lever. Said receiver square is

  usable in particular in 6.35, 9.52 or 12.7.

  - The marking liquid is chosen from inks or paints.

  - The socket 10 has an orifice 28 for filling the reservoir 16 which is capable of being closed by a plug. Said plug is preferably conical with a gas pitch to ensure better sealing. It can be represented by a male hexagon socket

1/8 brass (-8.5 mm) ...

2790217

Claims (12)

  1. Clamping tool comprising a clamping sleeve (10) comprising marking means (12) which come into contact with a fixing means to be clamped, said marking means being axially movable in said bushing, the latter comprising an imprint front (14) able to cooperate with said fixing means, characterized in that at rest said marking means are biased axially by elastic means towards a   advanced position in which they extend in said imprint.   2. Clamping tool according to claim 1, characterized in that, in service, in contact with the fixing means, said marking means move back   axially by compressing the elastic means.   3. Clamping tool according to claim 1 or 2, characterized in that the   socket has a reservoir (16) containing marking liquid.   4. Clamping tool according to any one of the preceding claims,   characterized in that the marking means comprise a pad (18) held in a sliding guide (20), the guide being urged forward by   a spring (22) until it comes to bear against a retaining ring (24).   5. Clamping tool according to the preceding claim, characterized in that the guide (20) has a shoulder (21) capable of cooperating with the ring   retainer (24) for sealing in the closed / out of service position.   6. Clamping tool according to any one of the preceding claims,   characterized in that the imprint (14) is formed in an end piece attached to the front of the socket. 6 2790217   7. Clamping tool according to claim 6, characterized in that the ring   retainer (24) is fixed to said tip.   8. Clamping tool according to any one of claims 4 to 7,   characterized in that the tampon (18) is in the form of a foam.   9. Clamping tool according to any one of claims 4 to 7,   characterized in that the tampon (18) is in the form of a felt.   10. Clamping tool according to any one of the preceding claims,   characterized in that the rear of the socket (10) has a receiving square   (26) intended to receive a square for driving a lever.   11. Clamping tool according to any one of claims 3 to 10,   characterized in that the marking liquid is chosen from inks or paints.   12. Clamping tool according to any one of the preceding claims,   characterized in that the sleeve (10) has a filling opening (28)   of the reservoir (16) which is capable of being closed by a plug.