US 2290720 A
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Description (OCR text may contain errors)
July 21, 1942. P. A. WATSON I TAR APPLICATOR'FQR FILLING CREVICES Filed April 3, 1941 27 1 ATTORNEY.
Patented July 21, 1942 or ies TAR APPLICATOR FOR FILLING CREVICES Pearl A. Watson, Auburn, Ind.
Application April 3, 1941, Serial N0. 386,625
This invention relates to improvements in tar applicators for filling crevices such as between pavement sections or fractures in pavements or other structures with hot bituminous material thereby to form joints between the sections or between the fragments of a fractured pavement thus to render the surface of the pavement uniformly smooth.
An object of the invention is to afiford an appliance through which hot fluid material is circulated and from which more or less of the circulating material is discharged at a definite point under control of an operator.
A further object of the invention is to construct the appliance so that the quantity of fluid discharged as well as the pressure of the fluid at the point of discharge are controllable by manipulations exercised by the operator.
Other objects and advantages of the invention appear in the following description.
An illustrative embodiment of the invention is shown in the accompanying drawing, in which:
Fig. 1 is a perspective view of a structure in which the invention is incorporated;
Fig. 2 is a detail front view of the discharge head andthe valve controlling the dispensing outlet thereof, partly cut away; and
Fig. 3 is another detail view showing a choke valve used in the appliance, a portion being broken away.
The illustrative embodiment of the invention consists of a manually portable appliance constituted of a feed pipe I and a return pipe 2 connected together at their distal ends by a discharge head 3 in the form of a coupling having a chamber 4 and a discharge opening 5, there being provided a removable nozzle tip 6 in connection with the head axially alined with said opening. The purpose of the nozzle tip is to vary the size of the outlet from the chamber as may be desired by providing tips of various bores for use interchangeably.
The proximal ends of the pipes have connected therewith, by means of suitable couplings '!8, hose members l'8' through which the filling agent is circulated in the feed and return pipes under pressure from any suitable source for supplying hot tar or other fluid filling material; such as a heating tank and pump (not shown) used in ordinary practice. The discharge head 3 is provided with a plunger valve 9 by which the discharge opening is normally closed, there being provided a stuffing box IE through which the shank of said valve extends, thus to prevent leakage.
The return pipe 2 has connected therein a pipe connection I I in which is arranged a choke valve [2 that is normally held in open position by means of a compression spring l3 through which the shank of the choke valve extends. A stufllng box [4 is provided that prevents leakage from the connection about said valve. One end of the spring bears against the stuffing box M and its opposite end acts against a washer l5 which is confined against relative upward movement on the shank of the valve by a cross pin it located therein. When the valve I2 is closed, the passageway I! through the connection II is restricted to. such extent asto retard the return flow of the circulating fluid through the pipe 2 thus causing rise of pressure of the fluid at the discharge opening 5.
The pipes I and 2 preferably are bent at points between their ends substantially at right angles, and said pipes are held in relative positions spaced apart from each other by means of clamps I8, I9 and 20 and by a bracket 2i that has a standard 22 to which is secured a handle 23. Another bracket 24 is preferably secured at one end thereof to the clamp IS with its middle portion clamped to the return pipe 2 approximately at the bend therein, and has a standard 25 provided at its top with a handle 26. i
The shank of the plungervalve 9 is connected with an operating rod 21 that extends loosely through and is guided by eye-bolts 28 secured respectively to the clamp 18 and the standard 25 and terminates at its upper end in a crock 29 conveniently located near the handle 25 to serve as a trigger for manipulating the operating rod. An offset 30 is made in said rod to which is connected one end of a tension spring 3f, the opposite end of said spring being secured in connection with the bracket l8, so that the plunger valve 9 is normally held closed and discharge of fluid through the opening 5 controlled.
A finger lever 32. is pivoted in the standard 22 and extends through the slotted upper end of the shank of the choke valve [2 where it is con fined by a second cross pin 33 and there is provided a notched lock bar 34 pivoted in the standard 22 that has latching engagement with the finger lever 32 for holding the lever in selected positions. When the bar is moved to inoperative position the choke valve is moved automatically to its full open position by reaction of the compression spring IS. The finger lever and the lock bar are positioned in close proximity to the handle 23 which permits the operator to convenient- 5 1y adjust the finger lever, and lock bar selectively with the fingers of the hand by which the handle 23 is grasped.
Operation In use, the appliance is connected by means of the hose members '|'-B' respectively with the pump and heating tank such as above referred to, so that upon operation of the pump the heated filling material is caused to circulate continuously and recirculate under pressure through the feed pipe, discharge head and return pipe, and the operator while grasping the handles 23 and 26 carries the appliance about and locates the nozzle immediately over the crevice to be filled, and then by manipulating the trigger 29 the'valve 9 is opened, whereupon more or less liquid is discharged into the crevice to be filled while cir-' culation of the fluid continues through the pipes. When it is desired to accelerate the discharge of the fluid through the nozzle tip the return flowof fluid through the pipe 2 may be restrained, resulting in a more forceful discharge through the nozzle tip when the plunger valve is raised.
Thus constructed and arranged the appliance is easily movable bodily about by the operator from place to place, where deposit of the fluid is required, by grasping the handles and the desired discharge of fluid is then regulated by manipulating, with his fingers, the trigger, the lever and the lock bar without releasing hold of the handles.
Variations from the particular construction above disclosed may readily be made by exercise of engineering skill without departure from the spirit or scope of the invention, and the following claims are intended to be inclusive of such variations.
What I claim is:
1. A manually portable hot tar applicator having a pair of handles and provided with a feed pipe and a return pipe, a chambered head connected with the distal ends of said pipes having a valve-controlled discharge opening, a choke valve for said return pipe, clamps securing said pipes relatively in fixed position provided with handles, an operating member for the discharge opening valve provided with a trigger located'adjacent one of said handles, controlling members for said choke valve located adjacent the other of said handles, and hose members connected with the proximal ends of said pipes through which to circulate hot tar in the appliance.
2.. A manually portable fluid applicator appliance having a frame formed of two pipes provided with clamps to secure said pipes relatively in fixed position provided with handles, a chambered head tion with the discharge opening valve located adjacent the other of said handles, and means including hose connections with the proximal ends of said pipes for circulating fluid through said pipes.
3. In a fluid applicator appliance, a chambered discharge head having a valve-controlled discharge opening, a pair of pipes connected with said head communicating with the chamber therein arranged to permit continuous circulation of fluid through said chamber, clamps securing said pipes in relative fixed position, a pair of handles in supporting connection with said pipes, a choke valve for one of said pipes that is at all times at least partially open and having an operating lever for adjusting said choke valve located adjacent one of said handles, a lock bar having latching relation with said lever, an operating rod connected with the valve for said discharge opening provided with a trigger located adjacent the other of said handles, and'means having hose connections with said pipes for maintaining circulation of fluiditherethrough.
4. An applicator for fluid filling material consisting of pipes shaped to form a manually' portable frame, a chambered head connecting the distal ends of the pipes having adischarge outlet, the arrangement being such as to'permit'c0ntinuous circulation of fluid material through said pipes and head, handles having supportin connections with said frame for its manipulation, a
valve for said outlet, a choke valve for one of continuous circulation and recirculation of fluid therethrough, there being provided a discharge opening in said coupling, handles secured to the applicator for manipulating it, a valve controlling said opening, another valve controlling flow of fluid circulated through said pipes, and adjusting means for said valves opera'ble with the fingers of the operator while grasping said handles to regulate circulation of fluid through said pipes and coupling and the discharge from said coupling.
6. A portable filling fluid applicator consisting of an angular frame formed of pipes, a chambered head connecting said pipes and having a discharge opening, and valves in said head and in one of said pipes controlling respectively said opening and the fluid circulated through said pipes, provided with manually operated means respectively for adjusting said valves to permit continuous flow of fluid through said pipes and the chamber of said connection.
PEARL A. WATSON.