Resilient tires and wheels – Tires – resilient – Cushion and pneumatic combined
Patent
1984-03-12
1987-05-12
Czaja, Donald E.
Resilient tires and wheels
Tires, resilient
Cushion and pneumatic combined
152165, 152166, 152209R, 152209B, 1523391, 152510, 152511, 156 96, 1986891, B60C 500, B60C 511, B60C 512
Patent
active
046641661
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a non slip system for a deformable driving band or similar.
Such a driving band may be formed by the running strip of a pneumatic tire for a vehicle of any type, more especially a light, utility or heavy vehicle. In another application, such a driving band may be formed by an endless transporter belt.
The aim of the invention is especially to improve the grip of the deformable driving band at the surface of the objects with which it comes into contact. Thus, in the case of vehicle tires, the air of the invention is to improve the grip of the tires on the ground, more especially in the case of rain, snow or ice; in the case of a transporter belt, the air of the invenion is to improve the grip of said transporter belt with the material or with the objects to be transported.
According to the invention, a non slip system for a deformable driving band or similar is characterized by the fact that it comprises passage means for passing through the driving band and emerging inwardly at right angles to pockets or similar provided in a compressible strip extending along the whole of the driving band, the assembly being such that a suction phenomenon increasing the grip is created by the compressible strip and the pockets in a deformation zone of the driving band corresponding to an expansion phase of said pockets.
The strip of compressible material may be formed by a part of the driving band itself; each passage means and the pocket (or similar which is associated therewith then form a blind channel slanting with respect to the direction perpendicular to the bearing surface, more especially so that there is progressive ejection of the air from the channel, before the outer end of the channel comes into contact with the bearing surface, this ejection phase being followed by a suction phase.
The slant of each channel may be provided so that, for the normal direction of travel of the driving band with respect to the bearing surface, the outer end of the channel only comes into contact with the bearing surface after the channel has cleared the beginning of the contact zone with this bearing surface.
Each blind channel is entirely located in the driving band which in a way plays also the role of the compressible strip, as pointed out above, this driving band undergoing first of all crushing in the deformation zone, which causes air to be ejected from the channel.
In the case of a pneumatic tire, each blind channel is located entirely in the running strip which is situated radially on the outside of the casing.
In a variant, each passage means and the pocket (or similar) which is associated therewith are formed by the combination of a blind channel slanting with respect to the direction perpendicular to the bearing surface and means for facilitating detachment of the channel.
These means for facilitating detachment of the channel may be formed by an auxiliary channel, with reduced cross section, situated in front of the main channel in the travel direction of the driving band with respect to the bearing surface, this auxiliary channel communicating at least with a zone of the main channel situated towards the blind end of this main channel. This auxiliary channel may be formed by a groove extending over the whole length of the main channel.
According to another possibility, the means for facilitating detachment of the blind channel may be formed by providing the channel in two parts, in particular two half channels with their concave sides turned towards each other provide in two blocks of material separated by a slit of zero width, these blocks being jointing during crushing of the driving belt and moving slightly away from each other during the decompression phase of the band, which causes detachment of the channel.
According to another aspect of the invention, the blind channels may be orientated in the left and/or right transverse direction so as to provide better grip laterally in bends in the road. The channels may be orientated in a direction having a component in the transverse direction a
REFERENCES:
patent: D269336 (1983-06-01), Yurkovich
patent: D273856 (1984-05-01), Vogler
patent: D278618 (1985-04-01), Kojima et al.
patent: 1411671 (1922-04-01), Schrank
patent: 4303115 (1981-12-01), Flechtner
Bokan Thomas
Czaja Donald E.
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