A valve has a body having a rotatable valve element. A drive mechanism has a drive input member and a drive output member that are coupled to the valve element for rotating the valve element. A shear member is operatively located within the drive mechanism between the drive input member and the driv
A valve has a body having a rotatable valve element. A drive mechanism has a drive input member and a drive output member that are coupled to the valve element for rotating the valve element. A shear member is operatively located within the drive mechanism between the drive input member and the drive output member for shearing in the event the force to rotate the valve element is excessive. The valve has indicia indicating open and closed positions for the valve element. An indicator is mounted to output drive member to properly align with the indicia regardless whether the shear member has sheared or not.
대표청구항▼
1. A valve, comprising: a body having a body passage therethrough intersected by a central cavity, the body having a flat side portion with an access opening therethrough;a valve element having a valve passage therethrough and rotatably carried in the cavity for movement between an open position wit
1. A valve, comprising: a body having a body passage therethrough intersected by a central cavity, the body having a flat side portion with an access opening therethrough;a valve element having a valve passage therethrough and rotatably carried in the cavity for movement between an open position with the valve passage and the body passage aligned and a closed position, the valve element having an end within the access opening, the end having a drive socket formed therein;an adapter plate secured to the side portion of the body, the adapter plate having a central opening in alignment with the access opening;a drive mechanism housing having an inner side wall that abuts and is fastened to an outer side of the adapter plate, the inner side wall of the housing having an inner side opening in alignment with the central opening and the access opening, the housing having an outer side with an outer side opening;a drive sleeve rotatably mounted in the housing and having an outer end protruding through the outer side opening of the housing;a drive mechanism operably coupled to the drive sleeve for rotating the drive sleeve;a drive shaft mounted in the drive sleeve, the drive shaft having an inner end protruding from the drive sleeve into the inner side opening of the housing, the drive shaft having an outer end protruding through the outer side opening of the housing;an extension member having an outer end with a receptacle that receives the inner end of the drive shaft, the extension member extending through the central opening of the adapter plate and having an inner end that inserts into the drive socket of the valve element for rotating the valve element;a shear member between the drive sleeve and the drive shaft that causes rotation of the drive shaft in unison with the drive sleeve and shears in the event the force to rotate the valve element is excessive, resulting in the drive sleeve being rotatable relative to the drive shaft;indicia at the outer side of the housing indicating open and closed positions for the valve element; andan indicator mounted to the outer end of the drive shaft for rotation therewith, the indicator aligning with the indicia, the drive sleeve being rotatable relative to the indicator in the event the shear member has sheared. 2. The valve according to claim 1, wherein: the outer end of the drive shaft protrudes past the outer side of the housing at least as far as the outer end of the drive sleeve. 3. The valve according to claim 1, wherein: the indicator comprises a circular plate with a circumference having a pointer, the plate being mounted to the outer end of the driveshaft. 4. The valve according to claim 1, wherein: the drive sleeve has an inner end located within the inner side opening of the housing. 5. The valve according to claim 1, wherein the inner end of the drive shaft protrudes into the central opening of the adapter plate and is spaced outward from the access opening in the body. 6. The valve according to claim 1, wherein: the indicator comprises an indicator plate with a circular periphery having a pointer extending therefrom, the indicator plate being mounted to the outer end of the drive shaft; andthe circular periphery of the indicator plate has an outer diameter greater than an outer diameter of the outer end of the drive shaft. 7. The valve according to claim 5, wherein the inner end of the drive shaft and the receptacle of the extension member are polygonal. 8. A valve, comprising: a body having a body passage therethrough intersected by a cavity;a valve element having a valve element passage and rotatably carried in the cavity for movement between an open position with the valve element and body passages aligned and a closed position;a drive mechanism housing secured to the body, the housing having a side wall with a face having a face opening;a drive sleeve having a bore and rotatably mounted in the housing, the drive sleeve having an outer end extending through the face opening past the face of the housing; a drive mechanism operably coupled to the drive sleeve for rotating the drive sleeve;a drive shaft located within the bore of the drive sleeve, the drive shaft having an inner end cooperatively coupled with the valve element for rotating the valve element in response to rotation of the output shaft, the drive shaft having an outer end that protrudes through the face opening of the housing at least as far as the outer end of the drive sleeve;a shear member located between the drive sleeve and the drive shaft, the shear member allowing rotation of the drive sleeve relative to the drive shaft if the shear members shears;indicia at the face adjacent the face opening indicating open and closed positions for the valve element; andan indicator secured to the outer end of the drive shaft for rotation therewith, the indicator aligning with the indicia to indicate the position of the valve element. 9. The valve according to claim 8, wherein the drive element has a drive socket, and the valve further comprises: an extension member having an inner end that inserts into the drive socket and an outer end that has a receptacle; andthe inner end of the drive shaft inserts into the receptacle of the extension member for causing rotation of the extension member and the valve element in unison with the drive shaft. 10. In a valve having a body with a body passage therethrough intersected by a cylindrical cavity, and a cylindrical valve element having a valve element passage and rotatably carried in the cavity for movement between an open position with the valve element and body passages aligned and a closed position, the valve element having a drive socket formed therein, the improvement comprising: a drive mechanism housing secured to the body, the housing having an outer side wall with a face and an outer side opening at the face; a drive sleeve within the housing having a bore;a drive mechanism operably coupled with the drive sleeve for rotating the drive sleeve; a drive shaft located within the bore of the drive sleeve, the drive shaft having an outer end; an extension member having an inner end that inserts into the drive socket and an outer end that has a receptacle; andthe drive shaft has an inner end that inserts into the receptacle of the extension member for causing rotation of the extension member and the drive shaft in unison with the drive shaft;a shear member located between the drive sleeve and the drive shaft, the shear member allowing rotation of the drive sleeve relative to the drive shaft if the shear members shears;indicia at the face adjacent the outer side opening indicating open and closed positions for the valve element; andan indicator fixed to the outer end of the drive shaft for rotation therewith, the indicator aligning with the indicia to indicate the position of the valve element. 11. The valve according to claim 10, wherein: the drive sleeve has an outer end that extends past the face. 12. The valve according to claim 11, wherein: the outer end of the drive shaft extends past the face at least as far as the input sleeve.
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