FR2494368A1 - DAMPER BUFFER, IN PARTICULAR A DEFENSE SHAFT FOR SHIP - Google Patents

Abstract

THIS SHOCK ABSORBER OR SEALING OR SIMILAR GASKET CONSISTS OF A BODY 1 IN ELASTICALLY DEFORMABLE MATERIAL, A SMOOTH LAYER 4 AND WEAR RESISTANCE BEING APPLIED TO AT LEAST ONE FACE OR PART OF THE BODY WHICH HAS CAVITY 2. APPLICATION ESPECIALLY AT SHIP DEFENSE STORES OR POSTS.

Description

Shock absorbers constituting rolls of

  fenses are widely used on wharf narois, but

  vessels are also provided with such means to

  the harmful effects of collisions and shocks.

  A damper of the aforementioned type consists essentially of an elastically deformable body, normally rubber or other similar compressible material. There is a reaction force that is due

  to deformation, and the important coefficient of friction

  rubber, in the case of long-term

  dinal or transverse, produces unwanted forces on or through the rubber on a body that

  moves along this one. The result is deterioration

  important rations of the shock or bead.

  To eliminate the above-mentioned drawback, he

  It has already been proposed to use

  of steel and wood, steel and

  synthetic material, and wood or

  synthetic materials, but these elements must be attached to the rubber by means of mechanical Another solution is that said sliding elements are positioned appropriately by means of

  suspension or special fixing of rubber.

  The possibilities of fixing the sliding elements are limited and practically impossible in

  small constructions. The application of metallic means

  fixation results in corrosion and

system malfunctions.

  The purpose of the invention is to suppress the

  aforementioned disadvantages in a simple and practical way.

  For this purpose, according to the invention, a smooth and wear-resistant layer is applied to at least one face

  or part of the elastically deformable body of the amorphous

  weaver or the like. This is actually done in such a way that said layer remains immovably connected to the rubber body, regardless of the direction and

  the magnitude of the forces acting on it.

  As a result, the mechanical fastening means of the layer on the body become useless and

  results in a simpler and less expensive installation.

  The body of the shock absorber is made of rubber and the smooth layer and wear resistance made of synthetic material. The connection between the body and the said

layer can be a glued joint.

  However, categories of materials are

  especially for the smooth and wear-resistant layer, which allows a robust joint, for

means of vulcanization.

  The characteristic of the invention has the advantage that following the simultaneous application of pressure and displacement along the damper, whatever their direction, the longitudinal and transverse forces are roughly deleted while retaining

  elasticity, thereby ensuring an absorptive

  energy and an ability to produce a reactive force.

  in a direction perpendicular to the damper.

  Other features and advantages of the

  will appear in the description that goes

  follow with reference to the annexed drawing given only

  by way of example and in which: FIGS. 1 to 5 are perspective and sectional figures of various possible embodiments

of the invention.

  The invention will be described in its application to a damper of the type used to protect docks and ships against damage that may result

  of shocks and that is called defense bulges.

  However, the invention should not be considered

  as limited to the above-mentioned application and may also

  be used as a gasket, for example

for doors.

  Fig. 1 shows that the damper constituted by

  a body 1 made of a deformable material for which the rubber

  rubber is the classic material. Body 1 presents

  a cavity 2 and a connecting opening 3. Thus the elasticity

  necessary ticity is ensured by the whole body.

  A layer 4 of a material resistant to wear and having a low coefficient of friction is applied to the body 1, this layer 4 being bonded to the body 1 preferably by vulcanization. It is understood that for this purpose a material is selected which allows vulcanization bonding and it has been found that a synthetic resin is a suitable material without the need for it.

  besides the use of mechanical means. Fig. 2

  be a damper consisting of a body 5 having a cavity 6. The smooth layer resistant to wear is designated

by reference 7.

  Fig. 3 shows an embodiment of a shock absorber of circular section. The body 8 is in this case still made of rubber and has a longitudinal duct 9. The wear-resistant layer of material

  synthetic is designated by the reference 10.

  The damper shown in FIG. 4 consists of

  a body 11 of polygonal shape having a cavity 12.

  The smooth layer made of synthetic material resistant to wear

  re is designated by reference 13.

  Fig. 5 shows an embodiment of a rubber damper comprising a body 14 having wings 15 and 16. The reference 17 designates the cavity which

  improves the elasticity properties of the body. References

  these 18 and 19 designate layers of synthetic material

that smooth wear-resistant.

  The attachment of the damper to an element to be protected is carried out in a known manner, which does not form part of the invention and which is not described in a

detailed way.

  The shock absorber according to the invention has compared to the dampers of the prior art

  made of a homogeneous rubber body, the advantages

following:

  1) the contact face has a low coefficient of

  friction and therefore does not involve longitudinal or transverse reaction forces; 2) the contact face has a significant resistance to wear; 3) no mechanical seal is used between the rubber and the slip layer;

  4) it shows no tendency to accumulate

electrostatic charges.

  Accumulation of an electrostatic charge in the damper due to friction can be prevented

  appropriate choice of synthetic material and rubber

Chouc.

Claims (4)

  1 - Antifreeze, gasket or analogous   staked by a body made of an elastically deformable material,   characterized in that it comprises a smooth and resistant layer   wear aunt (4, 7, 10, 13, 18) applied to at least one face or part of said body (1, 5, 8, 11, 14).   2 - Damper or gasket according to the claim   1, characterized in that said smooth layer resists   wear aunt (4, 7, 10, 13, 18) is fixed to the body (1, 5, 8, 11, 14) by gluing or, in the case where the category of material is suitable for this purpose, by vulcanization   or by means of a similar binding treatment.   3 - Shock absorber or trim according to any   of claims 1 and 2, characterized in that the   body (1, 5, 8, 11, 14) is made of rubber, said smooth and wear-resistant layer (4, 7, 10, 13, 18)   being made of synthetic material.   4 - Shock absorber or packing according to one   any of claims 1 to 3, characterized in that   the elastically deformable body (1, 5, 8, 11, 14) comprises   a cavity (2, 6, 9, 12, 17) or has a hollow shape is.