Geared hand wheel for butterfly valves
AssigneeJames M. Carroll Company
InventorJoseph Lawrence Strabala
Life of this patent
Estimating the term…
Abstract
The ability to control butterfly valves is greatly enhanced with a geared hand wheel having concentrically contained therein a pair of flat spur gears with at least one tooth difference and a pinion gear meshing with both of these gears with the pinion carried by the hand wheel in a planetary manner about these gears whereby a mechanical advantage is achieved as the spur gears are caused to rotate relative to one another by rotation of the hand wheel to control the valve shaft of the butterfly valve.
Claims8
For a butterfly valve having a projecting valve shaft for turning its control disc to open and closed positions, a disc-shaped geared handle comprising:
- a first circular gear means having attaching means for connecting it to a valve shaft of a butterfly valve;
- a second circular gear means having anchor means for securing it to a butterfly valve in a non-rotating relationship therewith, said first and second circular gear means arranged concentrically and in adjacent relationship with said second circular means having at least one tooth difference with respect to said first circular gear means;
- a carrier means arranged to rotate concentrically with said first and second gear means;
- at least one pinion gear means journalled in said carrier means to mesh with both said first and second circular gear means;
- circular hand wheel means associated with said carrier means whereby manual rotation of said hand wheel is operable to rotate said carrier means so that said pinion gear means meshing with said first and second circular gear means will track therewith in a planetary manner and cause them to rotate slowly relative to one another, in a direction related to the direction of rotation of the carrier and
- stop means arranged between the first and second circular gear means so that it is operable to limit the relative rotation thereof to a predetermined amount.
A butterfly valve with a geared handle comprising:
- a cylindrical hollow housing having a valve seat disposed threin;
- a circular control disc operably disposed in said seat;
- a valve shaft projecting from said hollow housing and fixedly attached to said control disc whereby rotation of said valve shaft is operable to turn said control disc for opening and closing said valve;
- a first circular gear means connected to said valve shaft in a non-rotating relationship;
- a second circular gear means co-axially mounted with said first gear means anchored to said hollow housing in a non-rotating relationship, said first and second gear means having at least one tooth difference;
- a carrier means journalled for co-axial rotation with said valve shaft and said first and second gear means;
- at least one pinion gear means journalled in said carrier means in meshing engagement with said first and second gear means;
- circular hand wheel means connected with said carrier so that the latter can be rotated thereby, whereby manual rotation of said hand wheel means is operable to cause said pinion means meshing with said first and second gear means to track in a planetary manner and cause said first and second gear means to rotate slowly with reference to one another and
- stop means located between the first and second gear means operable to stop relative rotation thereof after a predetermined amount of relative rotation.
Dependencies are inferred from the claim text.