US1179994A - Fluid pulsating device. - Google Patents

Description

A. BALL.

FLUID PULSATING DEVICE.

APPLICATION FILED NOV; 4, 1909.

1,179,994. Patented Apr. 18,1916.

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THE COLUMBIA PLAlyoGRAPH co., WASHINGTON, b. c.-

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, ALBERT BALL, OF CLAREMONT, NEW HAMPSHIRE. ASSIGNOR, BY IVIESNE ASSIGN- MENTS, TO SULLIVAN lVIACHINERY COMPANY, OF BOSTON, MASSACHUSETTS, A

CORPORATION OF MASSACHUSETTE.

FLUID PULsnrINe DEVICE.

Specification of Letters Patent.

Original application filed February 2, l907,Seria1No.355,404. Divided and this application filed November 4, 1909. Serial No. 526,251.

TooZZ whom it may] concern Be it known that I, ALBERT BALL, a (Hill- Zen of the United States, and a resident of tors employed for transmitting power from a motive device to a reciprocatory member, such as a tool or the like.

This application is a division of my prior application, Serial No. 355,404, filed F ebruary 2, 1907.

My invention will be best understood by reference to the following description taken in. connection with the accompanying illustration of one specific embodiment thereof, while its scope will be more particularly pointed out in the appended claims.

Referring to the drawings: Figure '1 is a vertical sectional view, showing a pulsator and compressor together with a working cylinder embodying one, form of my invention; and Fig. 2 is a plan view partly in horizontal section on the line 2-2 in Fig. 1, showing the valve employed in connection with the working cylinder to control the application of pressure to the piston thereof.

Referring to the drawings the embodivment of my invention shown therein for illustrativepurposes comprises a pulsator comprising a piston 4 which reciprocates relative to and within the cylinder 1 to operate the piston% in the working cylinder '32, which piston may be connected through its depending piston rod 3 to a reciprocatory tool such as a rock drill or the like, or with any other member to which it is desired to impart motion. My invention is not limited in this respect, being susceptible of useful application to many and widely different purposes.

:Inthe operation. of the pulsator, air or other fluid maintained under the desired "pressure. of the system, is pulsated,.that. is.

moved backward and forward so as to be alternately compressed and rarefied on oppos1te sides of the working piston, thereby serving reciprocatively to move the latter.

The pulsator is provided with the piston 4 having a trunk piston rod 5, power being applied to move the pulsator piston reciprocatlvely in any desired manner, as by means of an electric or other" motor (not shown) connected to the trunk piston rod by means of the connecting rod 6.

The pulsator is suitably connected to the working cylinder by any desired means, there being herein represented flexible rubber, or jointed metallic, or other suitable conduit connections 7 and 8, connecting the upper and lower ends of both cylinders re spectively. sent the upper and lower portions ofthe pulsator as connected with the corresponding portions of the working cylinder, it is apparent that such arrangement might be reversed if desired. The working cylinder may be located with any desired proximity to or at any desired distance from the pulsator cylinder and the two may have any desired or suitable support, the latter not being herein shown inasmuch as the present invention broadly contemplates the general application of this apparatus to any suitable purpose.

In order to maintain the pressure of the system at a predetermined point, suitable compressing means are provided, the same herein comprising a compressor having the cylinder 9 secured above and in axial alinement with the pulsator cylinder 1. lVithin Patented Apr. to, 19136.. I

While these connections reprethe compressor cylinder is mounted for rethecompre sq the e yipro uc ng anc d.

effective upper and lower pressure areas for the piston.

Any suitable fluid may be employed in the pulsator, but preferably compressed air is used, supplied in any desired manner and herein by means of a compressor whereby a pressure may be built up and used on both sides of the pulsator. For that purpose I have herein represented an inlet for the air or other fluid at 13, communicating through a valve opening 14 with the upper end of the compressor cylinder and by means of a vertical passage '15 with the lower end of said cylinder, said upper inlet passage being controlled by a valve 16 and the passage 15 being controlled by a valve 17, each normally spring-pressed to its seat. Suitably mounted with relation to each valve, or the stem thereof, are suitable valve holding means, herein represented as cam levers 18 and 19, respectively, whereby the valves may be held open when desired. In the present type of the invention the lower portion of the compressor cylinder is connected by a vertical passage 20 with the lower portion of the pulsator cylinder, such passage being controlled by a valve 21,preferably spring-pressed to its seat and provided with suitable means, such as the cam lever 22, to hold the same in raised position. Preferably, also, the upper portion of the compressor cylinder is connected by a passage 23 (shown in dotted lines) with the upper portion of the pulsator cylinder, such passage being preferably controlled by a valve 2 1, herein represented as spring pressed to its seat and having a cam lever or other device 25 to hold the valve in open position.

It is apparent that any suitable passages may be provided connecting desired portions of compressor and pulsator whereby pressure may be built up preferably at both ends of such pulsator. By the described passages and valves controlling the same, herein represented, when the building up of the air or other fluid in the pulsator is required, the cam levers are thrown off from all the valve stems and the valves are worked according to the travel of the air into and out of the air compressor. Preferably a safety valve 26 is provided normally springpressed to its seat and having, if desired, a cam lever or other device .27 whereby it may be held open.

When the building up of the pressure is finished or when the pressure fluid begins to issue from the safety valve 26, the operator throws down the cam lever 18 and raises the cam lever 22.

This stops the building up of the pressure in the pulsator, while air from the upper end of the compressor will then work back and forth through the inlet passage 13 passing the valve 16. In the action of the pulsatorthe bottom stroke of the compressor will work with the bottom stroke of the pulsator, thus transforming the compressor into a pulsating means and balancing the area of the trunk piston of the pulsator previously described. By moving the cam lever 25 to lift the discharge valve 24 from its seat the upper end of the compressor cylinder may be placed in free communication with the upper end of the pulsator cylinder so that the upstroke of the compressor piston also assists the upstroke of the pulsator piston. Thus the compressor may be operated asa single acting or a double acting compressor and when operating as a single acting oompressor the non-compressing end thereof may be rendered entirely ineffective by holding open the inlet valve for that end and leaving free the discharge valve, or it may be made to act as a pulsator and assist the main pulsator by holding open the dis charge valve thereof. When the upper end of the compressor is acting as a pulsator to assist the upper end of the main pulsator the force of the downward impulse given the working piston greatly exceeds the force of the upward impulse and the force of the blow struck by the tool is increased. Thus it is possible to vary at will the force of the impulse given the working tool in either direction.

In order to permit the escape of pressure fluid from the system, each of the cam levers for the different valves are brought into operative engagement with its valve, thus permitting the air or other fluid to pass out of the pulsator and out of the compressor.

The connections 7 and 8 from the pulsator 1 are represented as connected to the working cylinder at 28 and 29, respectively, the upper portion of the working cylinder having passages 30 and 31 communicating with the connection 7 and the upper portion of said cylinder whereby pressure may be admitted thereto. By means of the passages 30 and 31 not only may pressure be admitted to the working cylinder to give the down or working stroke to the working piston, but, the opening of the passage 31 into the cylinder being farther from the upper end thereof than the opening of the passage 33 is from the lower end thereof, a cushioning action is had which prevents'the piston 2 from striking the top head of the working cylinder 32 in making its upward stroke. Within the wall of the working cylinder is a vertically disposed passage 33 communicating at its lower end with the lower portion of the working cylinder and at its upper portion with the passage 30 when a suitably mounted valve 34: is actuated for the purpose.

While any suitable form of valve or valves may be employed and located as desired to control the pressure fluid supplied toqoppoe site sides of the working cylinder, I have herein indicated for that purpose a rotatably mounted valve having a passage35 adapted to place a connection, as 7,.from the pulsator in communication with the upperportion of the working cylinder or when suitably actuated, in communication withv the lower portion thereof, a suitable vent 36 (see dotted lines) being. provided and communicating with an axial vent 37 in said valve, whereby pressure in the upper portion of said cylinder may be discharged.

It is frequently desirable to raise the working piston within its cylinder together with its depending or otherwise connected tools, if it be used for the purpose ofactuating tools. In the present embodiment of the invention it is preferably done by raising and holding in elevation the piston 2 of the Working cylinder by movement of the two-way valve 34, mounted at the top thereof. At any time when the pulsator is in operation, or when enough pressure is in the pulsator, to enable it to lift the working piston 2, the latter may be raised and held elevated by turning the said two-way valve so that the part 35 therein registers with the parts 30 and 33, the vent passage 37 in said valve then being brought into register with the vent passage 36. The piston 2 therefore will be held elevated until the two'way valve 34 is turned to register with the parts 30 and 31, whereupon pressure is admitted to the upper face of said piston. The working piston, therefore, may be elevated by merely turning the valve and without interrupting the action of the pulsator.

It will be understood that while I have herein shown one particular form of my invention, such form being devised for the specific purposeherein of operating a stone channeling machine, the invention is not limited to the particular details illustrated, nor to the construction nor arrangement of parts herein shown, nor is it limited to the application herein made thereof, but extensive changes and deviations may be made from the described embodiment and the same may be usefully applied to a great variety of widely different purposes.

Claims:

1. The combination with a pulsator having a cylinder and a piston therein, of means to operate the same and a compressor for building up pressure in said pulsator, said compressor having a cylinder provided with a piston and valved fluid pressure connections for placing opposite sides of said compressor piston in communication with opposite sides respectively of the pulsator piston.

2. A pulsator having a piston and operating means therefor, and a compressor having a double-acting piston connected to that of the pulsator, said compressor having valved fluid passages connecting opposite sides of its piston with said pulsator.

3. An apparatus comprising a pulsator having a cylinder and a piston and operating means therefore, a compressor having a cylinder and a piston, operating means therefor, said compressor having inlet passages at opposite sides of the piston, also discharge passages communicating with said pulsator and valve means for said passages.

4. A pulsator having a cylinder and a piston and operating means therefor, a compressor having a piston therein, means to operate said piston in unison with said pulsator piston, said compressor having valved inlet passages supplying fluid pressure to oppositefaces of the compressor piston and having also valved outlet passages opening communication between opposite ends of said compressor and opposite ends of said pulsator respectively.

5. A pulsator having a cylinder and a piston provided with unequal effective pressure areas on opposite sides thereof and operating means therefor, a compressor mounted thereon and having a cylinder and a piston and valve-controlled inlets and valve-controlled outlets, the latter communicating with opposite sides of said pulsator piston, the piston in said compressor connected to the pulsator piston, and means to cause said compressor piston to supplement the pulsator piston.

6. An apparatus comprising a pulsator having a cylinder and a piston land operating means therefor, a compressor cylinder 9 having a piston 10 connected to the pulsator piston, valve controlled inlet passages 1d and 15 to said compressor, there being provided valve controlled outlet passages 20 and 23 between said compressor cylinder and said pulsator cylinder and a safety valve 26 for said pulsator cylinder.

7. The combination with a pulsator having a piston adapted to operate a driven element through reciprocating bodies of air on opposite sides of its piston, of a compressing device comprising a cylinder and a piston adapted independently to raise the pressure of the air on opposite sides of said pulsator piston, means for operating said compressing device and means for opening the opposite sides of said compressing device piston to free communication with the opposite sides of said pulsator piston to provide for the free interchange of pressure fluid and the equalization of pressure.

8. The combination-with a pulsator of a double acting compressor working in unison therewith, and means to utilize one end of said compressor as a pulsator to assist said main pulsator while still utilizing the opposite end as a compressor.

9. The combination with a pulsator of a double-acting compressor, connections from the compressor to deliver pressure fluid to said pulsator, both ends of said compressor being utilizable as a pulsator to assist said pulsator in creating pulsations of pressure.

10. The combination with a pulsator of a double-acting compressor working in unison therewith, connections from the compressor to deliver pressure fluid to said puisator, one end of said compressor being utilizable as a pulsator to assist said main pulsator and means for rendering the other end of said compressor ineffective.

11. The combination with a pulsator of a compressor acting in unison therewith, connections from the compressor to deliver pressure fluid to said pulsator and means for rendering said compressor ineffective as a compressor, but effective as a pulsator.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

ALBERT BALL.

Witnesses:

GEO. W. GILMAN, LEE A. KNIGHTS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. G.

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