ES2244279B1 - POCKET WITH RETAINER FOR GAS CYLINDER. - Google Patents

Abstract

Pocket with gas cylinder retainer. A grease retention system consisting of a pocket made of a plastic bushing and a grease retainer adapted to it, the plastic bushing being inserted inside a steel tube that acts as an external support for the cylinders gas in general but mainly those used in furniture units, office furniture, construction elements and the like. The lips of the grease seal face the inside of the steel tube to act as a scraper of the grease that goes between the gas cylinder itself and the plastic bushing and prevents its exit to the outside of the steel tube that It acts as a gas cylinder holder.

Description

Pocket with gas cylinder retainer.

Object of the invention

The invention relates to gas cylinders used in furniture elements, in particular, or in systems in general that require support, regulation and / or damping of movement.

In the gas cylinder technique there are various types, but this invention relates to those cylinders gas consisting of a steel tube that serves as an external support either to an axis guidance system that can be based on shaft plugs or bushings that act as guides, either Gas cylinders themselves that are guided by a bushing plastic in its displacement towards the outer end of the tube of steel.

Friction between guidance system (plugs of axle or bushings) and the element to be guided (gas axis or cylinder proper) is softened with the impregnation of fat in the contact zone between the two while achieving a silent operation

It should be noted that Spanish patents ES 9001140, ES 9600826 and the European 97500063.9 in favor of the applicant indicate an example of the type of gas cylinders where you can apply the present invention.

In this context the use of scraper in the Spanish patent 9001140 of the applicant, but its location and way of working brings consequences not quite positive as its greater difficulty of assembly and a lower efficiency of grease retention.

By displacement effect of the shaft or gas cylinder outward from the steel tube two occur differentiated anomalies as a result of fat drag that the gas cylinder itself carries out on its way:

- on the one hand, if the displacement of the Gas cylinder is continuous, originates one or several brands annular on the outside of the gas cylinder, very appreciable to face view, what remains slenderness to the furniture where it is installed by have some dirt,

- if, on the contrary, they originate discontinuous displacements of the gas cylinder and not frequent in over time, annular marks acquire not only an aspect unsightly but the fat accumulates with the existing dust in the environment and has given rise to various blackened layers and semi-hardness that detract functionality from the device itself gas cylinder movement.

The technique to be applied by the invention makes reference to gas cylinders, which consist of a tube of steel that acts as the outer support of a plastic bushing inserted inside it and whose head is arranged in direction at the exit, and in position, of the upper end of the tube of steel that acts as a support for the plastic bushing.

This plastic cap acts as guiding device of the gas cylinder itself, which it is tied tightly by its axis to the lower end of the tube steel, and the upper end of the gas cylinder moves along the inside of the plastic sleeve towards the outside of the tube steel.

In the technique of the invention to correct the lack of fat retention to prevent its exit to the outside of the steel tube, which is applied between the inner jacket of the bushing and the outer face of the gas cylinder itself, a pocket with a built-in grease seal is used, which is made in the plastic bushing itself or done in a way independent of it according to the type of gas cylinder where this improvement is applied.

It is an object of the invention to provide a pocket of a pocket to accommodate a grease seal.

It is another object of the invention a grease seal With lips to act as a fat scraper.

Finally, it is another object of the invention the insertion of the grease seal in a pocket that serves as a support of the same.

To carry out these objectives, within the retention technique, the invention chooses to make a pocket in the end or head of the plastic bushing that is located in the upper end of the steel tube that serves as an external support to the mentioned cap. In this way the plastic bushing leave the pocket centered on the gas cylinder.

A grease seal with the lips facing the base of the cap for which it acts as a scraper ring on the fat deposited between the plastic bushing and gas cylinder, which cannot drag the fat outward in its movement of sliding over the plastic bushing that serves as guide.

According to the drawings of the sheets of plans that accompany, the details and concretions of the invention will be understood more clearly, being for guidance:

Fig. 1 represents a gas cylinder full.

Fig. 2 shows the section of the bushing of plastic with the cashier made in the head of the same.

Fig. 3, is the fat retainer section.

As we can see, in fig. 1 se represents the complete gas cylinder (1), composed essentially of the steel tube (2) with its lower end (3) and its end upper (4), plastic bushing (5), gas cylinder (6) proper with its axis (7) fixed to the bottom (3) of the steel tube (2) and grease retainer (8) placed in the pocket (9) of the plastic bushing (5), which is inserted at the end top (4) of the steel tube (2), with the head (10) thereof oriented towards the exit of the gas cylinder (6) proper, and in position, of the upper end (4) of the tube steel (2) which acts as a support for the bushing (5) of plastic. On the head (10) of the plastic bushing (5) is made the pocket (9) with the grease seal (8) housed in this last and whose lips (11) are facing towards the inside of the steel tube (2). The area of fat is located on the surface (14) cylindrical contact between the plastic bushing (5) and the gas cylinder (6) proper.

Fig. 2 is composed of a section (12) of the plastic bushing (5), in which the arrangement is appreciated of the emptying of the pocket (9) in the head (10) of the socket where grease retainer (8) is located.

The inner shirt (13) of the plastic bushing (5).

In fig. 3 the section is clearly appreciated of the retainer (8) and the arrangement of the lips (11) of the retainer (8) towards its placement in the pocket (9) and its inward direction of the steel tube (2).

The implementation that is done through this invention is exposed by the displacement that the cylinder proper (6) performed through the bush (5) of plastic, which serves as a guide, towards the outside of the steel tube (2). This displacement causes the fat, deposited in the cylindrical surface (14) between the sleeve (13) of the bushing (5) of plastic and the gas cylinder (6) proper, be dragged towards the upper end (4) of the steel tube (2) where the head (9) of the plastic bushing (5) is located inserted in the steel tube (2).

When the grease carried by the cylinder arrives at gas (6) proper to the area where the cashier (9) is in the head (10) of the plastic bushing (5), is retained by the lips (11) of the oil seal (8), since the arrangement of the lips of the seal, facing the direction of drag of the grease that is inside the steel tube (2), has an effect scraper cleaning the outer surface (14) of the cylinder a gas (6) proper of the dragged fat, appearing the outer surface (14) of the grease-free gas cylinder when looks out of the steel tube (2).

In addition to the embodiment of the invention represented in the figures, embodiments of the invention different. First, inclusion is contemplated of a second pocket for retainer housing made in the plastic cap but at the opposite end of the head of the plastic bushing, in order to reinforce the retention effect of fat. On the other hand, it is contemplated that the cashier is not made as an entree practiced in the plastic form itself of the cap but as a non-plastic part integrated in a cap inlet (for example, as a metal pocket housed in a cap recess). In addition, modes are contemplated of performance in which the pocket that houses the seal is not find in the cap but be independent of plastic bushing, said cashier can be independent of plastic or non-plastic material.

Claims (6)

1. A grease retention system in gas cylinders of all types, especially those used in office furniture, consisting of a steel support tube that houses inside a plastic bushing provided with radial rib in the longitudinal direction, housed under pressure and secured by a pin from the outside, characterized in that: - the plastic bushing serves as a guide to gas cylinder itself and is housed with the head located at the upper end of the steel tube, which acts as plastic cap holder, - the cashier is made in the internal part of the head of the plastic cap and serves as a housing for the fat retainer, - between the plastic bushing and the cylinder a Gas itself exists a layer of fat. 2. A cylinder grease retention system gas, according to claim 1, with a second pocket for retainer housing made in the plastic bushing but in the opposite end of the plastic cap head. 3. A cylinder grease retention system gas, according to claim 1, with a housing pocket of retainer placed independent of the plastic bushing. 4. A grease retention system in cylinders gas, according to claims 1, 2 and 3, with grease seal placed in the corresponding plastic pocket, but with the lips facing the inside of the steel support tube for Act as scraper ring. 5. A cylinder grease retention system gas, according to claims 1, 2 and 4, with material pocket different from the plastic located in the plastic bushing. 6. A grease retention system in cylinders gas, according to claims 1, 3 and 4, with material pocket different from the plastic located independent of the bushing plastic.