Retractable antifriction bearings device for a loading bed and loading bed equipped with such a device

A retractable bearing device (10a-c) for a loading bed (1) to facilitate at least one of displacement and positioning of heavy loads (2) in a transfer plane (T), extending parallel to the loading bed (1), the bearing device comprising a profile (20a-c) equipped with balls (30) and displacement means (40a-c) for displacing the balls (30) between a working position, in which the balls (30) project from the profile to support the load (2), and a resting position, in which the balls (30) are retracted within the profile and do not support the load (2), each ball (30) is attached to a housing (21a-c) in the profile (20a-c) by a guide and sealing ring (50) having a spherical cavity (53) that complements the ball (30) and covering an area that extends from either side of a median transverse plane of the ball (30) to maintain the ball (30) in position relative to the housing (21a-c) and the guide and sealing ring (50) comprises a means for forming a seal between the ball (30) and the housing (21a-c).

A loading bed (1) in combination with retractable bearing devices (10a-b) to facilitate at least one of displacement and positioning of heavy loads (2) in a transfer plane (T), which is parallel to the loading bed (1), the bearing devices comprising profiles (20a-b) equipped with balls (30) and displacement means (40a-b) for displacing the balls (30) between a working position in which the balls (30) project from the profile to support the load (2) and a resting position in which the balls (30) are retracted within the profile and do not support the load (2), each ball (30) is attached to a housing (21a-b) in the profile (20a-b) by a guide and sealing ring (50) having a spherical cavity (53) that complements the ball (30) and covering an area that extends from either side of a median transverse plane of the ball (30) to maintain the ball (30) in position relative to the housing (21a-b) and in that the guide and sealing ring (50) comprises a means for forming a seal between the ball (30) and the housing (21a-b), the profiles (20a-b) of the retractable bearing devices (10a-b) being fixed relative to the loading bed (1).

A loading bed (1) in combination with retractable bearing devices (10c) to facilitate at least one of displacement and positioning of heavy loads (2) in a transfer plane (T), which is parallel to the loading bed (1), the bearing devices comprising profiles (20c) equipped with balls (30) and displacement means (40c) for displacing the balls (30) between a working position in which the balls (30) project from the profile to support the load (2) and a resting position in which the balls (30) are retracted within the profile and do not support the load (2), each ball (30) is attached to a housing (21c) in the profile (20c) by a guide and sealing ring (50) having a spherical cavity (53) that complements the ball (30) and covering an area that extends from either side of a median transverse plane of the ball (30) to maintain the ball (30) in position relative to the housing (21c) and in that the guide and sealing ring (50) comprises a means for forming a seal between the ball (30) and the housing (21c), the profiles (20c) of the retractable bearing devices (10c) being fixed relative to the loading bed (1), the profiles (20c) of the retractable bearing devices (10c) being movable relative to the loading bed (1) in a perpendicular direction to a surface (S) of the bed.