US1674345A - Spray pump - Google Patents

Description

June 19, 1928.

W. A. RUSLER SPRAY PUMP Filed May 20, 1925 Patented June 19, 1928.

. AT T F -m." 7

WILLIAM A. RUSLER, or JoHnsTou/n, 01x10.

SPRAY, ruMr.

Application filed May 20, 1925.; Serial No. 31,657.

vide animproved cap in which the packing is readily forced against the plunger to make the pump watertight Without binding,

the plunger sufficiently to make it work hard. Also to provide a cap which allows the use of considerable packing which will not need to be renewed frequently. Another object is to provide an improved construction of clamp and footrest by which the footrest can be readilyand firmly secured to the pump stock or tube Without denting or otherwise injuring the stock. Another object is to improve the valve construction, so that it may be more readily secured within the tube and so that sediment will not readily get between the washer or closure member and the seat.

The above and other objects which will hereinafter appear, are attained by improvements embodying new and useful features as disclosed in this application.

To enable others skilled in the art to so fully comprehend the essential features of the improvements that they may embody the same by the modifications contemplated by the improvements disclosed in this application, drawings illustrating a preferred form have been annexed as a part of this disclosure.

Fig. 1 is a longitudinal section through the pump on line 11 of Fig. 3.

Fig. 2 is a longitudinal section through the cap.

Fig. 3 is a section on line 3-3 of Fig. 1 showing the pump stock or tube, clamp, and foot rest.

Fig. 4 is a plan view of the valve 2.

Fig. 5 is a section on line 5-5 of Fig. 4.

The pump comprises an outer tube or pump stock 1 having a valve 2 secured near the lower end, preferably by soldering. The upper end of the pump stock 1 is formed with threads 3 engaged by threads 10 on the inside of cap 4. Against the end of the tube and inside of cap 4, is a washer 5 preferably of leather or similar material, and above washer 5 is oil soaked fibrous packing material 6. A plunger or piston tube 7 has a handle 8 and extends through hole 9 in cap 4 and is surrounded by packing 6 and Washer 5. Inside of cap 4 is an annular surface of shoulderv 11 sloping or tapering slightly toward hole 9,and a curved annular surface 12 tapering toward hole 9. By screwing cap 4' down, the washer 5for'ces and 12. Surface 12 forces-packing 6- against the plunger tube 7 to prevent leakage. If surface 12 were truly conical, there would be a tendency to force the packing 6 to a thin edge around the plungertube, and as the fibres are thin, they would be drawn up through opening?) during operation of the pump, and cause the pump to'work hard,

and in time to leak. But by makingsurface 12 curved, the packing 6' is brought against the tube in such manner as to avoid this difficulty. Also, surfaces or shoulder 11 is relatively narrowed and sloped slightly toward hole 9 so as to have a partial choke action so as to aid in preventing the packing 6 from being forced too tightly against the plunger tube 7. By making the threads 10 extend for a considerable distance, a large amount of packing can be inserted, thereby permitting many adjustments to keep the pump tight before having to renew the pack- The footrest 13 has a tang 14 provided with grooved seats 15. The opposite side of the tang is'curved at 16 to fit the surface of tube 1. .A clamp 17 has its main portion curved to fit tube 1 and two arms 18, extending in the same general direction and provided at their ends with inturned hook-shaped flanges 19 engaging seats 15. The flanges 19 and seats 15 are preferably slightly tapered upward toward tube 1. Parts 14 and 17 are assembled by placing clamp 17 over tube 1 and sliding seats 15 under flanges 19 and forcing or driving the tang 14 upward until parts 14 and 17 firmly clamp tube 1.

Both valves 2 and 20 are similar except as to size. Therefore it will be necessary only to describe valve 2 in detail. Valve 2 has a base portion 21, and an offset or raised seat 22 with a hole 23. The perimeter of the base is an annular upwardly extending flange 24.- Rising from flange 24 are arms 25 with their ends 26 bent inward over the top of closure member 27 after member 27 is placed in position to form restraining means or fingers to engage the flat. annular portion 28 of member 27 to limit upward the fibrous packing 6 against surfaces 11 i movement of said 'member Closure member 27 is also provided with a central projection 29 adapted to enga e the edge of hole 23 to prevent lateral i" i'spla'cement of member 27 out of operative position when it is in its uppermost position. As will be seen from the drawing, parts 21, 22, 24, 25, 26, comprise a cage to loosely hold closure member 27in position. .By making seat 22 raised there is provided an annular space or depression 30 where'sediment can readily fall so as to prevent the sediment from getting between closure portion 28 and seat 22.., Both the cage and closure member are preferably made by embossing or stamping from sheet-metal. The annularflange 24 being of substantial Width and of .a size to neatly fit in its tube, is readily placed in position, rand remains position, While being soldered at 531. V

Without further elaboration, this dis'e'loiSU'IB will so fully reveal the gist of the improvements that others can, by applying current know-ledge, readily vary these 1111- provements without omitting certain features that, from the .standpointof the prior art, fairly constitute essential characteristics of the generic and specific aspects of these improvements, and therefore such variations are intended to be comprehended of liquid in a pump oomprising, a sheet metal base portion having a raised annular seat with ac entral hole therethrough for the passageo f liquid, and a sheet metal .010-

sure member having a flat annular disc portion adapted to engage the top of the seat and also .llzkl-Ylhg fll1 annular projecting portion engaged within said hole, and restraining means to prevent the projecting portion from being completely disengaged fromsaid hole.

2. The valve of claim 1 in which the base portion has an outer flange des'gned to aid in securing thebase portion Wit in the bore of 11 tube of a pump, V I

WILLIAM A. RUSLER. v

Images