Fluid handling – With indicator – register – recorder – alarm or inspection means – Position or extent of motion indicator
Patent
1995-07-18
1998-06-23
Look, Edward K.
Fluid handling
With indicator, register, recorder, alarm or inspection means
Position or extent of motion indicator
137556, 116277, 116318, 116305, F16K 3700, F16K 3160
Patent
active
057691185
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to valve wheels in general, and more particularly to valve wheels that have a mechanism to indicate the position of a valve body.
BACKGROUND OF THE INVENTION
Valve wheels or handles are used to adjust heating systems, and the like. A person may turn the valve wheel, thus causing the valve body to move between an open position and a closed position.
Document SE-B-448 651 discloses a valve wheel having a means to indicate the position of the valve body. However, this valve wheel is not without shortcomings. First, the means allow a limited number of turns. Second, the indicated position may result in an inaccurate reading, particularly within a transition area from a partial turn to a completed turn of the valve wheel. Finally, a person is inconvenienced when reading the indicated position. The position indicating means for full turns and portions of a turn rotate together, however the windows for the respective indications are separated.
The objects of the present invention are to counteract and remove these inconveniences and produce a position indicating valve wheel that allows a larger number of turns and a quick and clear position reading.
SUMMARY OF THE INVENTION
The invention resides in a position indicating valve wheel comprising a wheel house having means to indicate the position of a valve body by showing a full turn as well as a partial turn. The means comprise two rotary elements that interact with each other, but each one provides its own indication. The first rotary element is a decimal ring that provides a flexible partial turn indication, whereas the second rotary element is a digit ring that is influenced by the decimal ring once per completed turn of the valve wheel. This is accomplished by a driver that is fastened to the decimal ring. Once per completed turn, the driver influences a radially outward positioned intermediate wheel, which in turn influences the digit ring which is position radially inward. The digit ring provides a full turn indication.
Additional characterizing features and advantages of the invention are explained in the following description, reference being made to the enclosed drawings, which in detail show only a few exemplifying embodiments.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a bottom plan view of a valve wheel made in accordance with the present invention.
FIG. 2 is an elevation view of a valve wheel made in accordance with the present invention.
FIG. 3 is a top plan view of a valve wheel made in accordance with the present invention.
FIG. 4 is a sectional view along the line 4--4 taken on FIG. 1.
FIG. 5 is a bottom plan view of a wheel house made in accordance with the present invention.
FIG. 6 is an elevation view of a wheel house made in accordance with the present invention.
FIG. 7 is a section view along the line 7--7 taken on FIG. 5.
FIG. 7A is an enlarged partial section view of a recess having a narrow shoulder with a holding lug made in accordance with the present invention. having a locking shoulder made in accordance with the present invention.
FIG. 8 is a bottom plan view of a digit ring made in accordance with the present invention.
FIG. 8A is an enlarge partial top plan view of a cog ring having a shaped cog and a positioning shoulder made in accordance with the present invention.
FIG. 9 is a section view along the line 9--9 taken on FIG. 8.
FIG. 9A is an enlarged partial sectional view a first spacer edge axially extended from an exposed surface of the digit ring made in accordance with the present invention.
FIG. 10 is a top plan view of the digit ring according to FIGS. 8 and 9.
FIG. 11 is a top plan view of a decimal ring made in accordance with the present invention.
FIG. 12 is an elevation view of the decimal ring made in accordance with the present invention.
FIG. 12A is an enlarged partial sectional view of a second spacer edge axially extended from an exposed flange of the decimal ring made in accordance with the present invention.
FIG. 13 is a bottom plan view of an interm
REFERENCES:
patent: 2752878 (1956-07-01), Keough
patent: 2767681 (1956-10-01), Pontius
patent: 3450091 (1969-06-01), Wajdik
patent: 4893582 (1990-01-01), Kalamon et al.
patent: 5316040 (1994-05-01), Townsend et al.
Lee Michael S.
Look Edward K.
Tour & Andersson Hydronics AB
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