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Machine translation
1. (WO1979000553) SCREW-AND-NUT GEARING
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1979/000553    International Application No.:    PCT/CH1978/000052
Publication Date: 23.08.1979 International Filing Date: 14.12.1978
IPC:
F16H 25/24 (2006.01), F16H 57/04 (2010.01)
Applicants:
Inventors:
Priority Data:
924/78 27.01.1978 CH
Title (EN) SCREW-AND-NUT GEARING
(FR) TRANSMISSION A VIS ET ECROU
Abstract: front page image
(EN)The screw-and-nut gearing is lubricated automatically and independently from the position and length of the screw (1), due to its rotation. This is achieved by means of a ring-shaped resilient piston (3) made of rubber which is set on screw (1) in a cylindrical cavity (4) within the nut (2), the friction between the piston and the screw being higher than the friction between the piston and the cylindrical cavity. When the screw (1) is moved forward by its rotation, it drives piston (3) which pushes the grease located in the cavity (4) and Forces it into the threads. When the screw (1) keeps rotating, the piston (3) is skidding backward but continues to push the grease into the thread. The device is used in lifting apparatus and machine-tools.
(FR)La transmission a vis et ecrou est lubrifiee automatiquement et independamment de la position et de la longueur de la vis (1), grace a sa rotation. Ceci est obtenu au moyen d"un piston (3) annulaire elastique en caoutchouc, qui est dispose sur la vis (1) dans un espace cylindrique (4) au centre de l"ecrou (2) et qui a une friction plus grande par rapport a la vis que par rapport a l"espace cylindrique. Lorsqu"on tourne la vis (1) pour la faire avancer, elle entraine le piston (3) qui pousse la graisse disposee dans l"espace (4) et la force a entrer dans les filets. Lorsque la rotation de la vis (1) continue, le piston (3) glisse en arriere mais continue a pousser la graisse dans le filet. Le dispositif est utilise dans les appareils de levage et dans les machines-outils.
Designated States:
Publication Language: German (DE)
Filing Language: German (DE)