US 2562946 A
Description (OCR text may contain errors)
Aug. 7, 1951 D G. READ 2,562,946
WATER WELL CAP Filed Feb. 11, 1948 Fig.
Donald 6. Read INVENTOR.
iatented Aug. 7, 1 951 VUNITED STATES PATENT OFFICE ,562,946 yvnfrnh WELL C 1 I P nn (E -Be ee ev 91 Application February 11, Serial 7,692
Oneobject of the inventionis to provide acasing head or cap which fits telescopically over the upper open end of the well casing, which is detachab y. conne ted wi h com nta .fi pipes, which is provided with a ground level vent, and which is frictionally fitted and held on the casing by a tightly compressed self-tightening gasket ring.
More explicitly, novelty is predicated upon a circular cap having a rim to surround the upper end of the casing, the inner surface of said rim being tapered to provide an endless wedge which acts on a rollable and compressible packing ring whereby when the ring is placed around the upper open end of the casing and the flange of the cap is fitted over same, the packing ring is forced and rolled down around the pipe and feeds itself up into the cap, thus providing a tight retaining fit for the cap but at the same time permits the cap to be removed whenever necessary or desired.
Another object of the invention is to provide a simple and economical well cap of the type stated which lends itself to location below the frost line in the ground and which is also satisfactorily usable in connection with an arrangement Where the pump is located or offset a distance from the well.
Other objects and advantages will become more readily apparent from the following description and the accompanying illustrative drawings.
In the drawings:
Figure 1 is a top plan view of a well casing cap construction device in accordance with the principles of the present invention;
Figure 2 is a view fragmentarily shown and in section and elevation showing the complete assemblage of parts;
Figure 3 is a top plan view of the packing ring; and,
Figure 4 is a section on the line 44 of Figure 3, looking in the direction of the arrows.
Referring to the drawings and particularly to Figure 2 it will be seen that a water well casing is denoted by the numeral 5 and that the cap which is of hood-like form is denoted by the numeral 6 and is fitted over the upper end portion of said casing. The body portion of the cap is of disc-like form in top plan view as shown in I and is centrally apertured. The central region of the body portion is provided with a riser or boss 2 Claims. (01. p c- 3 14) 8 and this provides added thickness to accommodate a plurality, if necessary, of flow pipes. In the present invention llhave simply shown a single flow pipe comprising a section 9 which is situated in the wellcasing and has its upper end threaded as at It! into screw threadsprovided therefor in the boss. The boss is also screw threaded to accommodate the screw'threaded end I l of the complemental flow pipe section l2; 1 ncidentally, the ground level is" denoted by the numeral [3 and the frost line or level is indicated at M, and in practice the flow pipe 12 is adapted for use in connection with an offset pump (not shown) and is therefore angularly bent as illustrated. By providing sufficient or extra thickness of metal in the boss disclosed two or more flow lines could, if desired, be utilized. The numeral i 5 designates a vent and it will be observed that the discharge end of this is above the ground line l3.
Returning now to the important phase of the invention, the self-centering and self-tightening cap action, it will be observed that the rim or flange of the cap, denoted by the numeral l6, telescopes downwardly over the water pipe 5 and that the inner surface of the flange is tapered to provide a frusto-conical endless wedge ll. By employing an endless packing ring, rubher or the like as at 18 and utilizing one which is cylindrical in cross section, then by placing the ring around the upper end of the well cas ing, before the cap is applied, after the latter step, the application of the cap, it is obvious that the wedge action comes into play to actually roll the packing ring down and around the casing until at last it becomes tightly wedged between the casing and surface ll. The sealing action thus attained is adequate and sufficient to provide a sealed tight closure for the casing.
Gne phase of the invention, therefore, has to do with a simple and economical hood like cap 6 with a special rim and a tapered surface co-acting with a cylindrical well casing or tube and the rolling and takeup action of an endiess packing ring to obtain the effective closing result seen in Figure 2 of the drawings. It is obvious, of course, that it is practical to loosen and pry the cap off and apply a new packing ring and thus to at all times maintain the result of sanitation desired. The threadedly connected co-acting or complemental pipes E and it providing for outflow and feeding of water from the well to the pump (not shown) makes possible the separation of parts for cap repair and exchange purposes.
A careful consideration of the foregoing description in conjunction with the invention as illustrated in the drawings will enable the reader to obtain a clear understanding and impression of the alleged features of merit and novelty sufficient to clarify the construction of the invention as hereinafter claimed.
Minor changes in shape, size, materials and rearrangement of parts may be resorted to in actual practice so long as no departure is made from the invention as claimed.
Having described the invention, claimed as new is:
1. In a structure of the class described, a well casing, the latter being cylindrical in cross section, a cap including a circular body portion and an annular rim, said rim surrounding the co-acting end portion of the well casing, the body porwhat is tion of said cap having a central boss, said boss having screw-threaded portions, a flow pipe in said well casing and threaded at its upper end and screwed into one of the screw threaded portions in said boss, a second flow pipe having a screw threaded and laterally bent end portion screwed into the screw threaded portion of said boss, a vent pipe connected with said cap adapted to extend up to a point above the ground line,
the inward peripheral surface of the rim of said cap being tapered, and a packing ring surround- 4 ing the casing and interposed between same and a tapered surface of said cap, where it is rollably wedged between the parts to provide a sealed, tight connection.
2. In a structure of the class described, a well casing and closing cap for the upper end thereof, said cap being adapted to accommodate flow pipes, said cap embodying a circular body portion and an annular rim portion, the rim portion surrounding the upper endof the casing, the inward peripheral surface of the rim being tapered, and a packing ring interposed between said tapered surface and casing, said ring being cylindrical in cross sectional form and adapted to be rolled and automatically jammed between the casing and rim portion when the latter is fitted telescopically down over the casing.
DONALD G. READ.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS