US655996A - Valve. - Google Patents

Description

Patented Aug. I4, I900. J. J. RYLANDS.

V A L V E (Application filed Jan. 20, 1900.)

(No Model.)

WITNESSES:

JAMES J. RYLANDS, OF HOMESTEAD, PENNSYLVANIA, ASSIGNOR TO THE HOMESTEADVALYE. MANUFACTURING COMPANY, OF SAME PLACE.

SPECIFICATION forming part of Letters Patent No. 65 5,996, dated August 14, 1900.

' Application filed January 20, 19cc. Serial no. 2,114. (No model.)

To all whom it may concern: 7

Be it known that 1, JAMES J. RYLANDS, of Homestead, in the county of Allegheny and State of Pennsylvania, have invented a certain new and useful Improvement in Valves, of which improvement the following is a specification.

The object of my invention is to provide a three-way valve of simple and inex'pensive construction which shall be specially applicable for controlling the flow of fluid under comparatively-high pressures and which shall be of easymanipulation and exempt from liability to leakage when under pressure.

' The improvement claimed is hereinafter fully set forth.

' In the accompanying drawings, Figure lis a central section through a valvular mechanism, illustrating an embodimentof my invention; Fig. 2, a similar section, with the operating-lever andits connections detached,

taken at'right angles to Fig. 1; and Fig. 3, a

similar section through the connecting-link and clevis of the supply-valve stem.

In the practice of my invention Iprovidea valve case or shell 1, which is preferably of cylindrical form and is provided with an inlet-passage 2 for connection with a deliverypipe leading from a pump, accumulator, or other source of fiuid' under pressure, a machine-supply passage 3 for connection witha supply-pipe leading to a'cylinder, press, or

other apparatus inwhich fluid-pressure isto be exerted, and an outlet-passage 14; for connection with an exhaust or Waste pipe leading to a suitable point of discharges A partition 5 is interposed between the inlet and machine-supply passages and a partition 6 between the machine supply and outlet passages, said partitions dividing the case into three superposed chambers. An upwardlyopening supply-valve 7, which is of the lift or puppet type, isfitted to seat upon a face or seat on the partition 5 and controls an opening orpassage through the same, and an upwardly-opening exhaust-valve 8,also of the lift or puppet type, is fittedto work substantially in line axially with the supply-valve and to seat upon a face or seat on the partition 6 and controls an opening or passage through the same.

I The'supply-valve 7 is connected to a stem 9, which passes through a properly-packed stuffing-box 10 on a removable cap 10, which is secured to and closes one end of the valveupon or fixed to a stem 11, which passes through and is guided in an opening in the Opposite end of the Valve-case. In order to facilitate the manipulation of the supply and exhaust valves, each ofsaid valves is preferably, as shown, provided with a preliminary or auxiliary valve of smaller diameter controlling a passage through the main or larger valve, to which it is applied. In the instance shown the preliminary sup ply-valve 12 is fixed upon the stem 9, and astud 13 passes through the valve 12 and through a central opening of larger diameter than the stud in the main supply-valve 7. The stud 13 is of such length that itshead, by the bearing of which on the valve 7 said valve is raised from its seat, stands a short distance away from said valve when the latter is seated, thereby enabling the preliminary Valve 12 to be unseated by theupward movement of the stem 9 before the main supply-valve is unseated by the head of the stud. A preliminary exhaust-valve 14-, fixed upon a stem 15, controls a central passage in the main exhaust-valve 8 said passage communicating with lateral passages 16 in the stem of the exhaust-valve," which are in openc'om'munr cation with the outlet-passage 4. An operating-lever 17 is coupled at one of its ends to a link 18, the opposite end of which is cou- 'pled by a pin 19 to lugs 20 on the valve-case 1. A clevis 21 is secured to the outer end of the stem 9 of the supply-valve and is coupled by a pin 22 to a link 23, the opposite end of which is coupled to the operating-lever. The connecting-link 23 is composed of two parallel jaws united at and near the end which is coupled to the clevis by an interposed body of metal on the top of which is formed an inclined or curved bearing-face 24. An exhaust-valve lever 25 is pivoted by a pin 26't0 lugs 27 on the end of the valve-case 1 which is nearer the outlet-passage 4, said lever hav* ing a bearing-face 28 on one of its ends which normally stands slightly clear of the outer end of the stem 15 of the preliminary excase 1, and the exhaust-valve 8 is formed liaust-valve 14, which stem projects a short distance beyond the outer end of the stem 11 of the exhaust-valve 8 in order that the preliminary exhaust-valve may be unseated by the bearing-face 28 before the latter unseats the main exhaust-valve. The opposite end of the exhaust-valve lever is coupled by a pin 29 to a link 30, which is in turn coupled at its opposite end to the operating-lever 17. A recess 31 is formed in the operating-lever near its connection with the link 23 to admit of its downward movement in unseating the exhaust-valve 8.

In the operation of a valvular mechanism embodying my invention the upward movement of the operating-lever 17, acting through the link 23, clevis 21, and valve-stem 9, first unseats the preliminary supply-valve l2, and thereby by relieving the unbalanced pressure on the top of the main supply-valve 7 facilitates the unseating of the latter, which is effected when the head of the stud 13 is brought into bearing upon the lower side of said valve. Fluid from the inlet-passage 2 is thereupon admitted to the machine-supply 3 passage and thence through the usual pipe connections to the cylinder, press, or other apparatus in which its pressure is desired to be utilized. The exhaust-valve 8 is meanwhile held firmly seated by the fluid-pressure on its upper surface. To eifect the release of pressure from the machine-supply passage 3,tl1e operating-lever 17 is moved downwardly until its movement is arrested by the seating of the supply-valve '7 and is then moved to the right until its recess 31 in passing over the inclined face 24 of the link 23 permits its further downward traverse. Such further traverse, acting through the link and exhaust-valve lever 25, unseats the preliminary exhaust-valve l4 and relieves pressure on the main exhaust-valve 8, which is thereafter unseated by the further movement of the parts and fully releases the fluid from the operated apparatus and the machine-supply passage 3 to the outlet-passage 4, from which it is discharged through the ordinary connections. By the movement of the operating-lever upwardly and to the left the moving members are brought to the normal position (shown in the drawings) without unseating the supplyvalve, which is held firmly seated by the pressure of the fluid in the inlet-passage 2.

I claim as myinvention and desire to secure by Letters Patent- 1. In a valvular mechanism, the combination of a case or shell divided by transverse partitions into three superposed chambers, an inlet-passage, a machine-supply passage, and an outletpassage, communicating, respectively, with the several chambers of the case, asupply-valve controlling communication between the inlet and machine-supply passages, an exhaust-Valve working substantially in line with the inlet-valve and controlling communication between the machine supply and exhaust passages, said exhaust-valve being disconnected from, and movable independentlyof, the supply-valve, an operating-lever, an exhaust-valve lever unconnected with, and having a range of traverse independently of, the exhaust-valve, connections coupling the supply-valveto the operating-lever, and connections coupling the exhaust-valve lever to the operating-lever.

2. In a valvular mechanism, the combination of a case or shell having an inlet-passag a machine-supply passage, and an outlet-passage, a supply-valve controlling communication between the inlet and machine-supply passages, an exhaust-valve controlling communication between the machine supply and exhaust passages, stems connected to the supply and exhaust valves, an operating-lever, a link coupling one end of said lever to the valve-case, a link coupling said lever to the stem of the supply-valve, an exhaust-valve lever pivoted to the case and having a bearing-face at one of its ends adapted to abut against the stem of the exhaust-valve, and a link coupling the opposite end of the exhaustvalve lever to the operating-lever.

JAMES J. RYLANDS.

\Vitnesses:

J. SNOWDEN BELL, CLARENCE A. WILLIAMS.

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