US1182646A - Double-acting force-pump. - Google Patents

Description

B. H. CLASPY.

DOUBLE ACTING FORCE PUMP.

APPLICATION FILED MAY4| 1914- Patented May 9, 1916.

2 SHEETS-SHEET l.

r0 5 4 6 N5 .7 I 3 0 o 4, w ii I :l 8 7 1 W M, 1?. I I I 4: M I w a l 22 M A x I I a 4/ l 8 M I II a: l I M H laaa THE COLUMBIA PLANOGRAPH c0.. \VASIHNGTCIN, D. c.

B. H. CLASPY.

- DOUBLE ACTING FORCE PUMP.

APPLICATION FILED |/IAY4.19I4.

1,182,66. Patented May 9,1916.

2 SHEETSSHEET 2.

TINITEEU TA BERT H. CLASPY, OF DOWAGIAC, MICHIGAN.

DOUBLE-ACTING FORCE-PUMP.

Specification of Letters Patent.

Patented May a, rare.

Application filed. May 4, 1914. Serial No. 836,362.

To all whom it may concern:

Be it known that I, BERT H. CLASPY, a citizen of the United States, residing at Dowagiac, Michigan, have invented certain new and useful Improvements in Double- Acting Force-Pumps, of which the following is a specification.

This invention relates to double acting force pumps.

The objects of this invention are: First, to provide a force pump having improved means for compensating for the wear on the moving parts and for keeping them tight at all times. Second, to provide a pump of the class described, having automatic means for relieving the pressure when it reaches a predetermined point. Third, to provide an improved force pump in which a single turning plug is used to control the flow of water.

Further objects, and objects relating to details and economies of structure and operation will definitely appear from the detailed description to follow.

I accomplish the objects of my invention by the devices and means described in the following specification.

The invention is clearly pointed out in the claims.

A structure which is a preferred embodiment of my invention is clearly illustrated in the accompanying drawing forming a part of this specification, in which:

defined and Figure I is a perspective view of a. pump embodying my invention. Fig. II is a. longitudinal sectional view on the line 22 of Figs. I and III. Fig. III is a transverse sectional view on the line 33 of Fig. II. Fig. IV is a detail view in side elevation of the face plug covering the valve chamber, showing thereon, the means forcontrolling the pressure on the turning plug. Fig. V is a detail sectional view on the line 5-5 of Fig. II. Fig. VI is a detail sectional view on the line 66 of Fig. III. Fig. VII is a detail sectional. view on the line 7-7 of Fig. III. Fig. VIII is a transverse sectional view similar to Fig. II, but showing a modified form of my invention. Fig. VIII is a longitudinal sectional view through the piston shown in Fig. VIII. Fig. IX is a transverse sectional view on the line 99 of Fig. X, showing a still further modified form of my invention. Fig. X is a transverse sectional view on the line 1010 of Fig. IX. Fig. XI is a detail sectional view on the line 1l-11 of Fig. XII. Fig. XII is a view in side elevation, of the turning plug shown in Fig. IX, showing in particular, the entrances of the inlet and outlet ports.

In the drawing, similar reference characters refer to similar parts throughout the several views and the sectional views are taken looking in the direction of the little arrows at the ends of the section lines.

Considering the numbered parts of the drawing, 1 is the main pump casing provided on either side with the cylindrical sockets 3-3 in whichthe sections of pipe 2, 2 are threaded. These pipes, together with the sockets, form piston chambers in which the pistons 4:, i work. These pistons i have recesses i therein which serve as compression chambers to help take care of the back pressure on the pistons. These pistons are pivoted to the lower ends of links 6, 6, and the upper ends of said links are pivotally connected at points 7, 7 on either side of the fulcrum 11 to the lever S provided with the handle 9. In the central part of the casing 1 is provided a shallow socket in which is threaded a section of pipe carrying the T-coupling 13, at the upper end of which is threaded the fork-like member 10, upon which the lever 8 is fulcrumed. In the lower part of the casing 1 the inlet pipe 12 is threaded into a shallow socket provided therefor. The spout 1% is carried by the T-coupling 13.

The casing 1 is provided with a tapered seat 15 extending transversely thereof and open at the front. In said seat is disposed the turning plug 16 which is tapered to fit snugly therein, leaving a space between the rear of the turning plug and the back wall of the seat, and said seat is closed by a face plug 17 so as to provide a space between the front of the turning plug and said face plug. The plug 17 carries a pin 19 threaded therein and said pin has an enlarged portion which slides in a transverse opening extending through said turning plug. The outer end of said pin is'provided with a nut 19 for adjusting the same and carries a pointer 19 pointing to suitable indicia provided on the face plug to indicate the pressure exerted by the spring to hold the turning plug in its seat.

A hearing plug 20 is threaded into the rear end of the transverse opening in said turning plug and the end of the bearing pin 21 threaded into the rear wall of the casing bears against said plug 20. The pin 21 is provided with a lock nut 22 to secure it in adjusted position. By this means the distance between the back of the turning plug 16 and the rear wall of the valve seat is determined, and this may easily be ad justed to compensate for the wear of the parts.

A coiled spring 18 is seated in the transverse opening in the turning plug against the bearing plug 20 and at its outer end bears against the enlarged portion 18 on the pin 19. It will readily be seen that the spring 18 tends to hold the turning plug into engagement with the end of the pin 21 while said turning plug is free to slide against the tension of the spring toward the front of the casing.

The casing 1 is provided with a port 42 leading from the inlet pipe 12 into the turning plug seat and with a port 43 leading from said seat into the outlet pipe. It is also provided on each side with a pair of ports 44, 45, and 46, 47, leading from the turning plug seat into the respective piston chambers 3, 3. The casing is also provided on each side with slot like openings 48 and 49, through which the trip pins 34 and 35, which are threaded into the turning plug at diametrically opposite points, project into the piston chambers so as to be engaged by the pistons 4 on the down stroke. The turning plug is provided with a pair of ports 50 and 53; and a second pair of ports 51 and 52, which are symmetrically placed with respect to each other. These ports are so situated that when the turning plug is disposed in its seat so that ports 50 and 53 are open, connecting the inlet port 42 with the right hand piston chamber and the left hand piston chamber with outlet port 43, ports 51 and 52 are closed. Likewise, when the turning plug is rotated to open ports 51 and 52, ports 50 and 53 are closed. These ports are long and slot-like in their nature and are somewhat curved in cross section, as is clearly shown in Fig. V. A vent 36 leads from port 52 to the space in the rear of the turning plug and a second vent 37 leads from port 51 to the space in front of the lug.

In Figs. VIII and VIII I have illustrated a modified form of my invention in which I use a turning plug identical With that shown in Fig. II. In this case, 12 is the inlet pipe and 13 is the outlet pipe.

Ports 26 and 27 are provided in the casing leading from the outlet pipe into the turning plug seat and similar ports 24 and 25 are provided leading from the turning plug seat to the inlet pipe. At either side of the casing are provided ports 28 and 29 leading from the turning plug seat into the piston chambers and through which the trip pins 34 and35 pass. The turning plug is provided with ports 38, 39, 40 and 41 identical with those shown in Fig. II. Ports 39 and 40 are provided with vents 36 and 37 similar to those shown in Fig. II.

A flat spring clip 34 is attached to the inner wall of the recess 4 and the lower end of said spring projects beyond the lower end of the piston, as clearly shown in Fig. VIII so as to engage the end of the adjacent trip pin, as pin 34. It will be seen that by this arrangement, as the piston starts on its upstroke the spring clip 34 will carry with it the pin 34 and rotate the turning plug so as to close ports 39 and 40 and open ports 38 and 41. The other piston is likewise provided with a similar spring clip to engage trip pin 35 and rotate the turning plug on the beginning of its upstroke.

In Fig. IX I have shown a still further modified form of my invention, in which the main pump casing is provided with ports identical with those shown in Fig. VIII, and the ports in the turning plug are modified. In this modification there is provided the port 30 which leads from the inlet port 25 to the piston chamber port 28, the port 31 which leads from the inlet port 24 to the piston chamber 29. Port 32 leads from port 29 to the outlet port 26 and port 33 leads from port 28 to the outlet port 27. hese ports are practically square in cross section and their entrances and disposition in the turning plug is clearly shown, particularly in Figs. X and XI. Ports 33 and 31 are also provided with release vents 36 and 37.

From the description of the parts above given, the operation of the structure should be very readily understood. With particular reference to the form of my invention shown in Fig. II, it Will be observed that as the left hand piston moves down in the piston chamber that the right hand piston moves up. Ports 50 and 53 are open, and as the right hand piston 4 moves up causing a partial vacuum in the piston chamber, the water is drawn into the right hand piston chamber through ports 42, 50 and 44. During the up-stroke of the right hand piston, the left hand piston will be traveling clownward in the piston chamber and forcing the water that has been drawn into said chamber. on the previous stroke out through ports 47, 53 and 43, into the outlet pipe. When the pistons complete their stroke, the left hand piston 4, which is moving clownwardly, strikes the end of the trip pin 35 and the turning plug is rotated to close ports 50 and 53 and open ports 51 and 52. Thus on the next stroke of the piston, water will be drawn into the left hand piston chamber 3 through ports 42, 51 and 46 and forced out of the right hand piston chamber 3 through ports 45, 52 and 43 into the outlet pipe 13.

I11 the modification shown in Fig. VIII, 12 is the inlet pipe, and 13 is the outlet pipe. The turning plug, in this modification, is the same as that shown in Fig. II. With the ports arranged as I have shown in Fig. VIII, upon the beginning of the upstroke of the righthand piston 4 spring clip 34 will carry with it trip pin 34 and rotate the turning plug so that ports 38 and 41 will be opened and ports 39 and 41 will be closed. WVater will then be drawn through ports 24 and 41 into the right hand piston chamber 23 while the descending piston in the left hand piston chamber will force water out of the said piston chamber through ports 38 and 27 As the left hand piston 4 starts on its upstroke, a flat spring clip (not shown) similar to clip 34 engages the pin 35 and rotates the turning plug closing ports 38 and 41 and opening ports 39 and 40. Water will then be drawn into the left hand piston chamber 3 through ports 29 and 40 and forced out of the right hand piston chamber through ports 39 and 26.

If it is desired to reverse the action of the pump so as to make 13 an inlet pipe and 12 an outlet pipe, all that is necessary to be done is to omit the spring clips 34 on the pistons. In that event, as the right hand piston 4 completes its down stroke it will engage the pin 34 and rotate the turning plug opening ports 39 and 40 and closing ports 38 and 41. During the upstroke of the right hand piston 4, water will be drawn into said right hand piston chamber through ports 26 and 39 and forced out of the left hand piston chamber by the descending left hand piston through ports 40 and 25. At the end of the down stroke of the left hand piston it will engage pin 35. rotate the turning plug, close ports 39 and 40 and open ports 38 and 41. Water will consequently be forced out of the right hand piston chamher 3 through ports 41 and 24 and drawn into the left hand piston chamber 3 through ports 27 and 37. It will thus be seen that by the use of the clips 34 the action of the pump can'be reversed so as to change the direction of flow through it. In this form of the invention, ports 28 and 29 serve to connect the piston chambers with the turning plug seat and at the same time to permit the operation of the trip pins 34 and 35 therethrough.

In the modification shown in Figs. IX to XII, the casing and the portstherein are the same as in Fig. VIII, while the ports in the turning plug are difierently disposed. With the ports as I have shown in Fig. IX, water is drawn into the right hand piston chamber 3 on the upstroke of the piston, through ports 25, 30 and 28, and at the same time water is forced out of the left hand piston chamber 3 by the descending piston through the ports 29, 32 and 26. At the end of the stroke the left hand piston 4 strikes the trip pin 35 and moves the turning plug to a position in which ports 30 and 32 are closed and ports 31 and 33 are opened. At the next stroke of the piston water is drawn into the left hand piston chamber 3 through ports 24, 31 and 29 and is forced out of the right hand piston chamber 3 through ports 28, 33 and 27.

In each of the three forms of my invention which Ihave here shown, I provide means for relieving the pressure when it exceeds a predetermined amount. Ihis control consists of the vent 36 which leads from one of the outlet ports in the turning plug to the space at the rear of said plug. A vent is likewise provided in the corresponding inlet port leading into the space in front of the turning plug. By means of the screw threaded pin 19, the enlarged portion 18 can be moved inwardly to change the pressure exerted by the spring 18. Ihe pointer 19" indicates the pressure of said spring.

IVhen the pressure created in the piston chamber on the down stroke of the piston exceeds a predetermined amount so that water is forced through vent 36 into the space back of the turning plug at a pressure greater than the pressure exerted by the spring 18 to hold the turning plug in its seat, the plug will be moved forwardly to relieve the pressure and allow the water to escape around the plug. Vent 37 communicates with a port which is open when the port containing the vent 36 is open, and hence, when the pressure exceeds the pre scribed amount, and the turning plug is moved forward, vent 37 serves to relieve the air cushion formed between the front of the plug and the face plug 17 so as to permit the turning plug to be moved forward in its 115 seat.

The pressure exerted by spring 18 may be changed by adjusting the pin 19. IVhen, on account of wear, the plug 16 does not fit tightly in the seat, it can be allowed to move to the rear of the seat by adjusting the bearing pin 21.

I am aware that the particular embodiment which I have here shown is susceptible of considerable variation Without departing from the spirit of my invention, and, therefore, I do not wish to be restricted to the same. I have found, however, that this particular form is to be preferred and, therefore, I desire to claim the 1 same specifically as well as broadly, as indicated by my appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In a pump of the class described, the combination of a pump casing, a tapered valve chamber extending transversely of said casing, piston chambers on either side of said valve chamber, pistons working in said piston chambers, suitable means for reciprocating said pistons whereby they are moved simultaneously in opposite directions, inlet and outlet pipes connected to said casing, ports in said casing connecting said inlet and outlet pipes and said piston chambers with said valve chamber, a tapered turning plug seated in said chamber, trip pins carried by said plug and extending through suitable openings in the casing into the piston chambers in position to be engaged by the descending piston, a pair of ports in said turning plug comprising an inlet port connecting said inlet pipe with one of said piston chambers and an outlet port connecting the other of said piston chambers with the outlet pipe, and a second pair of ports in said turning plug similarly connecting the inlet and outlet pipes with the piston chambers, the first pair of ports being so disposed in the turning plug as to be closed when the second pair is open, a vent connecting one of said outlet ports with the space between the turning plug and the back of the chamber, and a second vent connecting the corresponding inlet port with the space in front of said turning plug, all coacting substantially as described for the purpose specified.

2. In a pump of the class described, the combination of a pump casing, a tapered valve chamber extending transversely of said casing, piston chambers on either side of said valve chamber, pistons working in said piston chambers, suitable means for reciprocating said pistons whereby they are moved simultaneously in opposite directions, inlet and outlet pipes connected to said casing, ports in said casing connecting said inlet and outlet pipes and said piston chambers with said valve chamber, a tapered turning plug seated in said chamber, trip pins carried by said plug and extending through suitable openings in the easing into the piston chambers in position to be engaged by the descending piston, a pair of ports in said turning plug comprising .an inlet port connecting said inlet pipe with one of said piston chambers and an outlet port connecting the other of said piston chambers with the outlet pipe, and a second pair of ports in said turning plug similarly connecting the inlet andvoutlet pipes with the piston chambers, the first pair of ports being so disposed in the turning plug as to and said piston chambers with said valve I chamber, a tapered turning plug, a pair of ports in said plug comprising an inlet port connecting said inlet pipe with one of said piston chambers and an outlet port connecting the other of said piston chambers with the outlet pipe, a second pair of ports in said turning plug similarly connecting the inlet and outlet pipes with the piston chambers, the first pair of ports being so disposed in the turning plug as to be closed when the second pair is open, and means, operated by the pistons at the end of the stroke, for closing one pair of ports and opening the other, all coacting substantially as described for the purpose specified.

4. In a pump of the class described, the combination of a pump casing, a valve chamber therein, piston chambers on either side of said valve chamber, pistons working in said piston chambers, inlet and outlet pipes connected to said casing, ports in said casing connecting said inlet and outlet pipes and said piston chambers with said valve chambers, a turning plug seated in said valve chamber, a pair of ports in said plug comprising an inlet port connecting said inlet pipe with one of said piston chambers and an outlet port connecting the other of said piston chambers with the outlet pipe, a sec- 0nd pair of ports in said turning plug similarly connecting the inlet and outlet pipes with the piston chambers, the first pair of ports being so disposed in the turning plug as to be closed when the second pair is open, means operated at the end of the piston stroke whereby one pair of ports is opened and the other pair is closed, and means whereby the turning plug is forced from its seat when the pressure in the pump exceeds a predetermined amount, all coacting substantially as described for the purpose specified. I

5. In a pump of the class described, the combination of a pump casing, a tapered valve chamber extending transversely of said casing, piston chambers at each side of said valve chamber, ports connecting said valve chamber with said piston chambers, pistons working in said piston chambers, a spring clip carried by each of said pistons,

a tapered turning plug seated in said valve Ila)- chamber, ports in said turning plug adapted to communicate with the ports leading from said valve chamber to said piston chambers, trip pins carried by said turning plug and extending into said piston chambers, said trip pins being so disposed as to be engaged by the spring clips carried by said pistons whereby the turning plug is rotated at the beginning of the upstroke of the piston, all coacting substantially as described for the 10 purpose specified.

In Witness whereof, I have hereunto set my hand and seal in the presence of a Witness.

BERT H. CLASPY. [1 s.] Witness:

LUELLA G. GREENFIELD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Iatenie. Washington, D. C.

Images