Knob with different gear ratios

Details Knob with different gear ratios Knob with different gear ratios

F - Mech Eng,Light,Heat,Weapons

16

K

F16K 31/53 (2006.01) F16K 31/60 (2006.01)

Patent

CA 2409507

A knob adjustment device particularly for adjusting the temperature in valve units for water-heating apparatus is described and comprises geared movement- transmission means interposed between the knob (2) and an operating member (4) of the valve unit in order to transmit a rotary movement to the member about its own axis as a result of a rotation of the knob. The geared transmission means comprise reduction means (5,6,7,8) with a variable transmission ratio such that, for a first angular portion (C) and a second angular portion (D) of the rotation of the knob, the member is rotated with respective different transmission ratios (T1,T2).

L'invention concerne un système de réglage de molette, en particulier, pour régler la température dans les soupapes d'un appareil de chauffage de l'eau. Ce système comprend des moyens de transmission de mouvement à engrenages, placé entre la molette (2) et un organe de fonctionnement (4) de la soupape pour transmettre un mouvement rotatif à ce dernier autour de son propre axe par suite de la rotation de la molette. Le moyen de transmission à engrenages comprend des moyens de réduction (5, 6, 7, 8) avec un rapport de transmission variable, de telle sorte que pour une première partie angulaire (C) et une deuxième partie angulaire (D) de la rotation de la molette, l'organe tourne avec des rapport de transmission différents (T¿1?, T¿2?).

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