Abstract of
GB683387
683,387. Valve spindles. HOSKINS, S. W. June 20,1950 [April 5, 1949], No. 9318/49. Class 135. In a stop valve assembly, the upper end of the stem carrying the closure member engages in a turnable operating member in such manner that, when the latter is actuated, the closure member movesrectilinearlywithout rotating, and there is a lost-motion means in bearing engagement with the operating member and also with the side of the stem at a position spaced from the upper end thereof so that the operating member can move relatively to the stem both before the closure member is opened or after it has seated. In an embodiment, the rotary screwed operating spindle 20 is recessed at 18 at its inner end to engage over the head of a stem 25 integral with the conical closure member 24. The recess 18 is apertured at 34 to carry balls which engage in an annular groove 33b in the stem so that, as the spindle 20 is rotated and thus moved longitudinally, stem 25 will be moved only longitudinally. As groove 33b is elongated, there will be some lost-motion between the spindle and stem just as the member 24 closes and opens. Pressure is exerted by the spindle on the stem through the intermediary of a ball 37 engageable in recesses in the spindle and stem. The stem is packed by a gland 29.
wherein the valve-operating spindle is provided with at least one other body or protuberance which, when the spindle is turned in the valve-closing direction and after the lost motion has been taken up acts to move the valve towards its seat, the valve again 75 moving rectilinearly without turning on its axis.
4. An assembly as claimed in Claim 3, wherein the valve is integral with a valve stem, the end of which remote from the 80 valve is loosely fitted in a recess formed in the inner or head end of the valve-operating spindle, a number of spaced balls, each fitted in a hole in the said inner or head end, being engaged in an elongated annular recess 85 in the valve stem.
5. An assembly as claimed in Claim 4 wherein the elongated recess is parallel for a portion of its length and is formed with curved ends which act as abutments for the 90 balls or protuberances to limit the travel of the valve spindle relative to the valve stem.
6. An assembly as claimed in Claim 5, wherein at least one other ball is fitted in a recess in the end of the recess in the inner 95 or head end of the valve-operating spindle and engages with the end of the valve stem within the last mentioned recess.
7. An assembly as claimed in any of the preceding Claims 4 to 6 wherein the valve 100 stem is formed with a tapered valve end which engages in a hole formed in a valve seat member fitted in the valve body or casing, the arrangement being such that axial movement of the valve stem in one 105 direction causes the tapered end to close the said hole, while axial movement in the opposite direction causes the hole to be opened.
8. An assembly as claimed in Claim 7, 110 wherein the said hole is adapted, when the valve is opened, to provide communication between a chamber in the valve body or casing and an inlet (or outlet) passage, an outlet (or inlet) passage being in constant 115 communication with the chamber.
9. An assembly as claimed in any of the preceding Claims 4 to 8, wherein the said inner end or head part of the valve spindle is loosely guided in a cap or cover 120 which is fitted on the valve body or casing and is formed with a threaded hole in which the valve spindle is screwed.
10. An assembly as claimed in Claim 9, wherein the valve stem is slidably guided in 125 a gland which forms part of a stuffing box provided in the valve body or casing and portion 24 of the valve member and the hole 9 in the valve seat member. The fluid can then flow from the central bore 2 in the valve body out through the outlet union 5.
In order to close the valve the hand-wheel 22 is turned in the opposite direction, the valve spindle 20 then moves downwards, and the three circumferentially-spaced balls travel downwards in the elongated annular recess 33 until the ball 37 in the end of the recess 36 in the head 18 of the valve spindle 20, engaging in the depression 38 in the upper end of the valve stem, forces the valve member 25 downwards without causing it to turn on its axis, the tapered portion 24 eventually closing the hole 9 in the valve seat member 8.
A sealing gasket 39 is engaged by a hexagonal portion 40 of the outlet union 5 and a sealing gasket 41 is engaged by a hexagonal portion 42 of the inlet union 12, these gaskets acting to prevent the escape of the fluid along the threaded shanks of the unions from the interior of the valve, body.
It will be understood that the inlet union 12 may act as the outlet union and the outlet union 5 as the inlet union.
What I claim is: 1. A stop valve or cock assembly, wherein the valve is arranged on a valve stem, the end of which remote from the valve is engaged in, and is operatively connected with a turnable valve-operating member in such a manner that when the valve-operating member is moved in the appropriate direction the valve is moved rectilinearly into or out of sealing contact with its valve seat without turning about its axis, and wherein lost motion means are provided which are in bearing engagement partly with the valve-operating member and partly with the side of the valve stem, at a position spaced from the said end of the latter, and which permit movement of the valve-operating member relatively to the valve stem after the valve has seated and also movement of the valve-operating member relatively to the valve stem before the valve has opened.
2. An assembly as claimed in Claim 1, wherein the valve-operating member consists of a turnable valve-operating spindle which has a screwed connection with the valve body or casing or with a part attached thereto and is turnable at the exterior of the body or casing, the spindle carrying one or more bodies or protuberances, which are engaged with and which, when the spindle is turned, are adapted to turn relatively to the valve stem, the said bodies or protuberances also being capable of lost motion relatively to the valve stem in the 683,387 which acts to hold the stuffing box packing in position by pressure exerted upon it by the cap or cover.
11. A stop valve or cock assembly substantially as described with reference to the accompanying drawings.
Agents for the Applicant, STANLEY, POPPLEWELL, FRANCIS & ROSS, Chartered Patent Agents, 19, Buckingham Street, Strand, London, W.C.2.
PROVISIONAL SPECIFICATION.
Improvemients relating to Valves.
I, STANLEY WILLIAM HoSKINs, a British Subject, of St. Blazey, 390, Lady Margaret Road, Southall, Middlesex, do hereby declare the nature of this invention to be as follows:This invention relates to valves or cocks adapted to be used for controlling the flow of liquid or gas from a source of supply to a place or places of use.
The valves of certain known types of stop valve or cock assemblies are opened and closed by means of screw-threaded spindles which are turnable in threaded holes provided in the valve bodies or casings or parts attached thereto. The threaded spindle is usually rigidly connected with the valve, with the result that the turning movement of the valve spindle also causes the valve to turn. The valve body is also provided with a stuffing box in which packing is arranged around the valve spindle.
Such an arrangement has the disadvantages that turning of the valve spindle beyond a predetermined limit in the valveclosing direction may cause excessive wear on the valve and (or) its valve seat and on the packing around the valve spindle in the valve body stuffing box. One object of the present invention, therefore, is to overcome these disadvantages.
A stop valve or cock assembly according to the present invention is characterised by the feature that the valve is operatively connected to a turntable valve-operating membe in such a manner that when the valve-operating member is turned in the appropriate direction the valve is moved rectilinearly into or out of sealing contact with its valve seat without turning about its axis.
The valve-operating mechanism according to this invention is applicable, amongst other types, to stop valve or cock assemblies fitted with valves which are adapted to operate in conjunction with flat or tapered or conical valve seats or with tapered or needle-like valves which are adapted to operate in conjunction with tapered or cylindrical ports. The invention is also applicable to stop valve or cock assemblies comprising stems or spindles which are integral with, or are rigidly attached to, the valves proper. 60 The valve is preferably opened and closed by means of a valve-operating spindle which has a screwed connection with the valve body or casing or with a part attached thereto and which is turnable from the exterior 65 of the valve body, the said spindle carrying one or more bodies or protuberances which are engaged with and which, when the spindle is turned, are adapted to turn relatively to the valve stem, the said bodies 70 also being capable of lost motion relatively to the valve stem in the axial direction, the arrangement being such that when the spindle is turned in one direction the valve proper is moved away from or towards its 75 seat, the valve stem and the valve both moving rectilinearly without turning about their common axis.
It-is also preferred to provide the valveoperating spindle with at least one other 80 body or protuberance which, when the spindle is turned in the opposite direction and after the said lost motion has been taken up, acts to move the valve towards its seat, the valve stem and the valve again 85 moving rectilinearly without turning on their common axis.
Thus, in one construction the valve is integral with a valve stem, the end of which remote from the valve is loosely fitted in a 90 recess formed in the inner or head end of the valve-operating spindle. A number of spaced balls, each fitted in a hole in the said head end, engage in an elongated recess in the valve stem. A further ball is also 95 fitted in a seating in the end of the said recess and engages with the end of the valve stem in the recess. -For simplicity f-description the contructional form of the invention which will now 100 be described, by way of example, will be assumed to be arranged vertically. The stop valve assembly comprises a valve body having a central bore and a lateral threaded hole into which the shank of a hollow outlet union is screwed, the bore of the union thus communicating with the said bore of the valve body. The lower end of the bore of the valve body is countersunk so as to provide a seating for a hardened valve seat 110 683,387 which are both rounded. The said head of the valve spindle is formed with three lateral, circumferentially-spaced holes in each of which a ball is seated, the three balls also engaging in the said elongated recess in the valve stem. Above the upper end of the valve stem, within the head of the valve spindle, the recess in the head is formed with a central hole in which a ball is seated, the lower part of the ball engaging in a small depression in the upper end of the valve stem.
When the valve is closed the tapered part of the valve member forms a fluid-tight seal with the hole in the valve seat member.
When the said hand-wheel is turned in the appropriate direction the valve spindle turns and is moved upwards and in due course the three balls in the head of the valve spindle engage with the upper rounded end of the said elongated annular recess in the valve stem. If the hand-wheel is still turned in the same direction the valve stem is pulled upwards, without turning on its axis, so that there is a clearance between the tapered portion of the valve member and the hole in the valve seat member.
The fluid can then flow from the central bore in the valve body out through the outlet union.
In order to close the valve the hand-wheel is turned in the opposite direction, the valve spindle then moves downwards, and the three circumferentially-spaced balls travel downwards in the said elongated annular recess until the ball in the end of the recess in the head of the valve spindle, engaging in the depression in the upper end of the valve stem, forces the valve member downwards without causing it to turn on its axis.
Dated this 6th day of April, 1949.
Agents for the Applicant, STANLEY, POPPLEWELL, FRANCIS & ROSS, Chartered Patent Agents, Jessel Chambers, 88/90, Chancery Lane, London. W.C.2.
member which is formed with a central hole and is held in position in the valve body between a shoulder formed at the junction of the said central bore of the valve body and the said countersunk end thereof and the upper end of a hollow inlet union which is screwed into the valve body below the valve seat member.
The upper end of the valve body is screwthreaded externally and is screwed into an internally-threaded recess in a hollow cap or cover which is integral with a shank formed with a central bore which is coaxial with the said recess and in which the cylindrical head of a valve-operating spindle is turnable and slidable. Above the said head the spindle is formed with a threaded stem which is screwed through a threaded hole formed centrally in the upper end of the cap or cover, a valve-operating hand wheel being fixed on the outer end of the stem.
From its bottom end for some distance upwards, the valve member is tapered and is adapted to engage in, and to project downwards out of, the hole in the said valve seat member into the bore of the inlet union.
The portion of the valve member above the tapered lower portion is cylindrical in section and forms a valve stem which is somewhat larger in diameter than the upper (or maximum diameter) end of the tapered portion. The valve stem is slidably guided in a hole which connects the central bore of the valve body to a stuffing box which is formed in the valve body and in which packing is arranged around the valve stem in the usual manner. The packing is held in position in the stuffing box by means of a gland having a flange at its upper end.
When the valve body cap or cover is screwed on to the valve body the inner end of the threaded recess in the cap or cover bears upon the gland and acts to force the latter downwards and thus to hold the packing in position in the stuffing box.
The valve stem projects upwardly through the gland and at a short distance from its upper end it is formed with an elongated annular recess, the upper and lower ends of Abingdon: Printed for Her Majesty's Stationery Office, by Burgess & Son (Abingdon), Ltd.-1952.
Published at The Patent Office, 25, Southampton Buildings, London, W.C.2, from which copies may be obtained.
683,387
Description
I7 i V _ -
PATENT SPECIFICATION
Date of filing Complete Specification: June 20, 1950.
Application Date: April 5, 1949. No. 9318/49.
Complete Specification Published: Nov. 26, 1952.
Index at Acceptance:-Olass 135, D14a.
COMPLETE SPECIFICATION.
Improvements relating to Valves.
I, STANLEY WILLIAM HOSKINS, a British Subject, of St. Blazey, 390, Lady Margaret Road, Southall, Middlesex, do hereby declare the invention, for which I pray that a patent may be granted to me, and the method by which it is to be performed, to be particularly described in and by the following statement: -
This invention relates to valves or cocks adapted to be used for controlling the flow of liquid or gas from a source of supply to a place or places of use.
The valves of certain known types of stop valve or cock assemblies are opened and closed by means of screw-threaded spindles which are turnable in threaded holes provided in the valve bodies or casings or parts attached thereto. The threaded spindle is usually rigidly connected with the valve, with the result that the turning movement of the valve spindle also causes the valve to turn. The valve body is also provided with a stuffing box in which packing is arranged around the valve spindle.
Such an arrangement has the disadvantages that turning of the valve spindle beyond a predetermined limit in the valveclosing direction may cause excessive wear on the valve and (or) its valve seat and on the packing around the valve spindle in the valve body stuffing box. One object of the present invention, therefore, is to overcome these disadvantages.
According to this invention, I provide a stop valve or cock assembly, wherein the valve is arranged on a valve stem, the end of which remote from the valve is engaged in, and is operatively connected with a turnable valve-operating member in such a manner that when the valve-operating member is moved in the appropriate direction the valve is moved rectilinearly into or out of sealing contact with its valve seat without turning about its axis, and wherein lost motion means are provided which are in bearing engagement partly with the valveoperatinumember and partly with the side of the valve stem, at a position spaced from the said end of the latter, and which permit movement of the valve-operating member relatively to the valve stem after the valve has seated and also movement of the valveoperating member relatively to the valve stem before the valve has opened.
The valve-operating member may consist of a valve-operating spindle and the valve may be integral with or operatively connected to a valve stem.
The valve-operating mechanism according to this invention is applicable, amongst other types, to stop valve or cock assemblies fitted with valves which are adapted to operate in conjunction with flat or tapered or conical valve seats or with tapered or needle-like valves which are adapted to operate in conjunction with tapered or cylindrical ports.
The valve is preferably opened and closed by means of a valve-operating spindle which has a screwed connection with the valve body or casing or with a part attached thereto-and which is turnable from the exterior of the valve body, the said spindle carrying one or more bodies or protuberances which are engaged with and which, when the spindle is turned, are adapted to turn relaively to the valve stem, the said bodies or otuberances also being capable of lost motion relatively to the valve stem in the axial direction, the arrangement being such that when the spindle is turned in one or the other direction the valve proper is moved awav from or towards its seat, the valve stem and the valve both moving rectilinearly without turning about their common axis.
It is also preferred to provide the valveoperating spindle with at least one other body or protuberance which, when the spindle is turned in the valve-closing direction and after the said lost motion has been taken up, acts to move the valve towards its seat, the valve stem and the valve again moving rectilinearly without turning on their common axis.
6835387 683,387 Thus, in one construction the valve is integral with a valve stem, the end of which remote from the valve is loosely fitted in a recess formed in the inner or head end of the valve-operating spindle. A number of spaced balls, each fitted in a hole in the said head end, engage in an elongated recess in the valve stem. A further ball is also fitted in a seating in the end of the said recess and engages with the end of the valve stem in the recess.
The elongated recess is parallel for a portion of its length and is formed with curved ends which act as abutments for the balls or protuberances to limit the travel of the valve spindle relative to the valve stem.
At least one other ball may be fitted in a recess in the end of the recess in the inner or head end of the valve-operating spindle and engages with the end of the valve stem within the last mentioned recess.
In the construction referred to above the valve stem is formed with a tapered valve end which engages in a hole formed in a valve seat member fitted in the valve body or casing, the arrangement being such that axial movement of the valve stem in one direction causes the tapered end to close the said hole, while axial movement in the opposite direction causes the hole to be opened.
The hole is adapted, when the valve is opened, to provide communication between a chamber in the valve body or casing and an inlet (or outlet) passage, an outlet (or inlet) passage being in constant communication with the chamber.
One constructional form of the invention is shown by way of example, in the accompanying drawing.
For simplicity of description this constructional form of the invention will be assumed to be arranged vertically. The stop valve assembly comprises a Valve body 1 having a central bore 2 and a lateral threaded hole 3 into which the shank 4 of a hollow outlet union 5 is screwed, the bore 6 of the union thus communicating with the bore 2 of the valve body.
The lower end of the bore 2 of the valve body is countersunk at 7 so as to provide a seating for a hardened valve seat member 8 which is formed with a central cylindrical hole 9 and is held in position in the valve body between a shoulder 10 formed at the junction of the central bore 2 of the valve body and the countersunk end thereof and the upper end of the shank 11 of a hollow inlet union 12 which is screwed into the valve body below the valve seat member.
The upper end of the valve body is screwthreaded externally at 13 and is screwed into an internally-threaded recess 14 in a hollow cap or cover 15 which is integral with a shank 16 formed with a central bore 17 which is coaxial with the recess and in which the cylindrical head 18 of a valveoperating spindle 19 is turnable and slidable. Above the head 18 the spindle is formed with a threaded stem 20 which is screwed through a threaded hole 21 formed 70 centrally in the upper end of the cap or cover, a valve-operating hand wheel 22 being fixed on the outer end of the stem.
From its bottom end for some distance upwards, the valve member 23 is tapered at 75 24 and is adapted to engage in, and to project downwards out of, the hole 9 in the valve seat member 8 into the bore 12a of the inlet union 12. The portion 25 of the valve member above the tapered lower portion 24 is cylindrical in section and forms a valve stem which is somewhat larger in diameter than the upper (or maximum diameter) end 26 of the tapered portion. The valve stem is slidably guided in a hole 27 85 which connects the central bore 2 of the valve body to a stuffing box 28 which is formed in the valve body and in which packing 29 is arranged around the valve stem in the usual manner. The packing is 90 held in position in the stuffing box by means of a gland 30 having a flange 31 at its upper end. When the valve body cap or cover 15 is screwed on to the valve body the inner end 32 of the threaded recess 14 95 in the cap or cover bears upon the flange 31 of the gland and acts to force the latter downwards and thus to hold the packing in position in the stuffing box.
The valve stem projects upwardly 100 through the gland and at a short distance from its upper end it is formed with an elongated annular recess 33, the upper and lower ends 33a and 33b of which are both rounded. The head 18 of the valve 105 spindle 20- is formed with three lateral, circumferentially-spaced holes 34 in each of which a ball 35 is seated, the three balls also engaging in the elongated recess 33 in the valve stem. Above the upper end of 110 the valve stem, within the head of the valve spindle, the recess in the head is formed with a central hole 36 in which a ball 37 is seated, the lower part of the ball engaging in a small depression 38 in the upper end 115 39 of the valve stem.
When the valve is closed the tapered part 24 of the valve member 25 forms a fluidtight seal with the hole 9 in the valve seat member 8. When the hand-wheel 22 is 120 turned in the appropriate direction the valve spindle 20 turns and is moved upwards and in - due course the three balls 35 in the head 18 of the valve spindle engage with the upper rounded end 33a of the elongated 125 annular recess 33 in the valve stem. If the hand-wheel 22 is still turned in the same direction the valve stem 25 is pulled upwards, without turning on its axis, so that there is a clearance between the tapered 130 axial direction, the arrangement being such that when the spindle is turned in one or 65 the other direction, the valve is moved away from or towards its seat without turning about its common axis.
