FR2520711A1 - IMPROVEMENTS IN LATCH HOOKS - Google Patents

Abstract

THE SUBJECT OF THE PRESENT INVENTION IS A HOOK INCLUDING A SAFETY TONG WHICH IS PIVOTALLY MOUNTED ON THE BODY OF THE HOOK IN A WAY TO BE ABLE TO APPLY TO THE SPOUT OF THIS HOOK AND CLOSE THE OPENING OF THIS HOOK, AND A LOCK WHICH IS ARRANGED AT THE REAR OF THE HOOK AND OF WHICH A BEC CAN ENGAGE IN AN OPENING PROVIDED IN THE CENTRAL PART OF THE LINGUET WHEN IT IS IN THE SAFETY POSITION. ACCORDING TO THE INVENTION, THE LINGUET 4 INCLUDES, AT ITS REAR PART, A BOSS 4B OWN TO COME INTO STOP AGAINST LOCK 7, WHICH LIMITS THE PIVOTING OF THE LINGUET AND IN THAT THE BODY 1 OF THE HOOK IS CONFORMED SO AS TO ALLOW TO THE LATCH TO PIVOT BY AN ANGLE SUFFICIENT FOR ITS SPOUT 9 TO FREE FROM THE OPENING 10 OF THE LINGUET IN THE SAFETY POSITION, BUT INSUFFICIENT FOR IT TO COME OUTSIDE THE PATH OF THE BOSS 4A OF THIS LINGUET.

Description

2520711

  Improvements made to locking hooks.

  The present invention relates to the hooks comprising a safety latch which is pivotally mounted on the body of the hook so as to be applied to the spout of the hook and close the opening thereof, and whose end portion opposite the spout optionally has a connecting element, for example

  an eye The latch thus automatically comes into

  when the hook is subjected to a load.

  There are hooks of this kind having a lock which is arranged at the rear of the hook and which a beak can engage

  in an opening provided in the central portion of the latch, when

  that it is in position of safety The pawl can thus free untimely opening of the hook But the experiment

  shows that it can happen that the pawl, pivoting from its po-

  security situation, wedge the thumb on the lock.

  The present invention relates to an improvement

  brought to these hooks in order to avoid this inconvenience.

  The hook according to the invention is characterized in that the latch has, at its rear part, a clean boss to abut against the latch, which limits the pivoting of the pawl, and in that the body of the hook is shaped from in order to allow the latch to pivot by a sufficient angle so that its spout emerges from the pawl opening in the safety position, but insufficient

  for it to come out of the path of the boss of this latch.

  In these conditions, when the pawl pivots, its stroke is limited by the meeting of its boss with the lock, which

  prevents jamming of the user's thumb.

  In a particular embodiment of the invention, the

  central portion of the latch has a second opening in the-

  what can engage the latch beak when the boss of the latch

is in support against this lock.

  An embodiment of an improved safety hook according to the present invention will now be described by way of nonlimiting example, with reference to the appended drawing in which:

  Figure 1 is an elevational view of the hook with

  Partially locked, the latch being locked in the safety position Figure 2 shows a part of the latch, the latch being

in abutment against the lock.

  In drawing, we see in 1 the body of a hook which delimits 2 -

  the opening 2 and is terminated by a spout 3.

  The safety pawl 4 is pivotally mounted about an axis between two lugs la provided at the upper part of the body 1. The upper end of this pawl is provided with an eye 6 and its lower end can be applied on the beak 3 by closing the

  2 and thus preventing the sling or

  water in which the spout was engaged 3.

  The latch 7 is pivotally mounted at 8 at the rear of the body 3,

  between the two ears the latch or spout 9 of this lock can be-

  in an opening 10 of complementary shape provided for in

  ratchet of the central portion 4a, forming a hub, of the latch 4 of

  to immobilize the latter in its safety position; a few

  tain game is of course provided to allow the beak 9 of the lock

to escape from the opening 10.

  A machining 11 provided in the body 1 allows the lock 7 to

  rotate will suffice so that its beak 9 emerges from the opening 10.

  The hub 4 has pawl 4 has a second opening 12 in which the spout 9 of the lock can engage when the pawl is in the open position (Fig 2) This opening also has a

  form complementary to that of the beak 9, that is to say that it presents

  on both sides 12a and 12b against which the

these 9 and 9 b of this beak 9.

  Beyond the opening 12, the pawl has a boss 4b which bears on the face 9c of the spout 9, opposite the face 9a thereof * The machining 11 has a depth allowing the latch 7

  to rotate sufficiently so that the user's thumb 13

  the lock is not crushed by the pawl coming into the open position But this depth is insufficient to allow

  on the face 9c of the spout 9 to come out of the path of the boss 4b.

  Under these conditions, when the pawl 4 takes its open position, the boss 4b meets stre face 9 c of the nozzle 9; the stroke of the latch is thus limited, which avoids the

wedging of the thumb.

  It is then sufficient to rotate the latch 7 so as to

  its beak in the opening 12, which locks the latch in

its open position.

  It goes without saying that the present invention should not be considered as limited to the embodiment described and shown,

  but covers, on the contrary, all variants.

3 2520711

Claims (3)

  1 hook comprising a safety latch which is mounted, pivoting on the body of the hook so as to be able to apply to: the spout of this hook and close the opening thereof, and a lock (which is arranged at the rear of the hook and which a beak can engage: in an opening provided in the central portion of the latch when   it is in a safety position, characterized in that the lin-   watch 4 comprises, at its rear part, a boss 4 b clean to abut against the latch 7, which limits the pivoting of the ling and in that the body 1 of the hook is shaped so as to allow the lock to rotate at a sufficient angle so that its spout 9 emerges from the opening 10 of the pawl in the safety position, but insufficient for it to come out of the path of the boss 4 a of this latch.   2 hook according to claim 1, characterized in that the central portion of the pawl comprises a deu A Pme opening   12 in which can engage the spout 9 of the lock when the boss.   4a has pawl bears against this latch.