Lined butterfly valve

Claim 2

A butterfly valve, including, a. a body member having i. a cylindrical bore and ii. diametrically opposed openings communicating with said bore, b. a plastic resin lining seated within the cylindrical bore of the body (a) defining a flow passage therethrough, i. end flanges extending radially over the ends of the body (a), and ii. diametrically opposed collars extending from the outer surface of and about apertures formed in the lining (b), engaging within the opposed openings (a) (ii) of the body member (a), c. a disc, encapsulated with plastic resin, pivotally mounted within the lining (b) and body member (a) for movement into and out of a position in a plane transverse to the flow passage of the lining (b), d. said disc (c) being pivotally mounted by means of, i. a valve stem rigidly secured to the disc and projecting through one of the collars (b) (ii) and opening (a) (ii), and ii. a pivot pin secured to the body (a) projecting through the other of the collars (b) (ii) and openings (a) (ii) and engaging a socket formed in the disc (c), said socket including a boss formed of the plastic resin encapsulating the disc receivably engaging about said pivot pin, e. first packing means disposed between and for sealing between the valve stem (d) (i) and the collar (b) (ii) through which said stem projects, and f. seconD packing means disposed between and for sealing between the boss formed of the plastic resin encapsulating the disc and the collar (b) (ii) through which the pivot pin (d) (ii) projects.

Claim 3

The invention of claim 1 wherein the first packing means (e) includes, at least one annular packing member, and a compression spring biasing the packing member into sealing engagement with the valve stem (d) (i) and lining (b) within the collar (b) (ii) through which the valve stem (d) (i) passes.

Claim 4

The invention of claim 2 whrein at least a portion of the valve stem (d) (i) adjacent the disc (d) is encapsulated with plastic resin for sealing engagement with the packing member.

Claim 5

The invention of claim 2 wherein the annular packing member includes a plurality of annular rings of wedge shape cross-section.

Claim 6

The invention of claim 1 wherein the second packing means (f) includes, at least one annular packing member, and a compression spring biasing the packing member into sealing engagement with the boss formed of the plastic resin encapsulating the disc (d) and lining (b) within the collar (b) (ii) through which the pivot pin (d) (ii) passes.

Claim 7

The invention of claim 5 wherein the annular packing member includes a plurality of annular rings of wedge-shaped cross-section.

Claim 8

The invention of claim 1 wherein the plastic resin in each instance is a fluorocarbon resin.

Claim 9

A butterfly valve including, a. a body member having i. a cylindrical bore, ii. diametrically opposed openings communicating with said bore, and iii. an inwardly-facing annular groove centrally formed in the wall of the bore (a) (i), the axis of the annulus of which is coextensive with the axis of the bore (a) (i), b. a plastic resin lining seated within the cylindrical bore of the body (a) defining a flow passage therethrough, and having i. end flanges extending radially over the ends of the body (a) and ii. diametrically opposed collars extending from the outer surface of and about apertures formed in the lining (b), engaging within the opposed openings (a) (ii) of the body member (a), c. a disc, encapsulated with plastic resin, pivotally mounted within the lining (b) and body member (a) for movement into and out of a position in a plane transverse to the flow passage of the lining (b), d. said disc (c) being pivotally mounted by means of, i. a valve stem rigidly secured to the disc and projecting through one of the collars (b) (ii) and openings (a) (ii), and ii. a pivot pin secured to the body (a) projecting through the other end of the collars (b) (ii) and openings (a) (ii) and engaging a socket formed in the disc (c), said socket including a boss formed of the plastic resin encapsulating the disc receivably engaging about said pivot pin, e. first packing means disposed between and for sealing between the valve stem (d) (i) and the collar (b) (ii) through which said stem projects, f. second packing means disposed between and for sealing between the boss formed of the plastic resin encapsulating the disc and the collar (b) (ii) to which the pivot pin (d) (ii) projects, and g. a resilient seat member having i. an annular, ring-like portion disposed within the groove (a) (iii) and between the body (a) and the lining (b), and ii. two diametrically opposed collars integrally formed with the ring-like portion (g) (ii), each collar engaging about one of the lining collars (b) (ii), the resilient seat member yieldably urging the lining (b) into engagement with the disc (c) when said disc is in a position in a plane transverse to the flow passage of the lining (b).

Claim 10

A butterfly valve including, a. a body member having i. a cylindrical bore, ii. diametrically opposed openings communicating with said bore, and iii. an inwardly-facing annular groove centrally formed in the wall of the bore (a) (i), the axis of the annulus of which is coextensive with the axis of the bore (a) (i), b. a plastic resin lining seated within the cylindrical bore of the body (a) defining a flow passage therethrough, and having i. end flanges extending radially over the ends of the body (a) and ii. diametrically opposed collars extending from the outer surface of and about apertures formed in the lining (b), engaging within the opposed openings (a) (ii) of the body member (a), c. a disc, encapsulated with plastic resin, pivotally mounted within the lining (b) and body member (a) for movement into and out of a position in a plane transverse to the flow passage of the lining (b), d. said disc (c) being pivotally mounted by means of, i. a valve stem rigidly secured to the disc and projecting through one of the collars (b) (ii) and openings (a) (ii), and ii. a pivot pin secured to the body (a) projecting through the other end of the collars (b) (ii) and openings (a) (ii) and engaging a socket formed in the disc (c), said socket including a boss formed of the plastic resin encapsulating the disc receivably engaging about said pivot pin, e. first packing means disposed between and for sealing between the valve stem (d) (i) and the collar (b) (ii) through which said stem projects, f. second packing means disposed between and for sealing between the boss formed of the plastic resin encapsulating the disc and the collar (b) (ii) to which the pivot pin (d) (ii) projects, and g. a resilient seat member having i. an annular, ring-like portion disposed within the groove (a) (iii) and between the body (a) and the lining (b), and ii. two diametrically opposed collars integrally formed with the ring-like portion (g) (ii), each collar engaging about one of the lining collars (b) (ii), the resilient seat member yieldably urging the lining (b) into engagement with the disc (c) when said disc is in a position in a plane transverse to the flow passage of the lining (b).

Claim 11

The invention of claim 8 wherein two parallel annular ribs are formed on the outer surface of the lining (b) to engage sidewalls of the groove (a) (iii) of the valve body (a) such that the resilient seat member (g) is retained between said ribs and within the groove (a) (iii).

Claim 12

The invention of claim 9 wherein a pluralitY of spaced holes are provided in the ribs formed on the outer surface of the lining (b), and spaced tips are formed on the resilient seat member (g) engaging the holes of the ribs to restrict movement of the resilient seat.

Claim 13

The invention of claim 8 wherein the lining (b) tapers to a larger thickness from a point adjacent the resilient seat member (g) outwardly to the end flanges (b) (i) thereof.

Claim 14

The invention of claim 8 wherein the plastic resin in each instance is fluorocarbon resin.

Claim 15

The invention of claim 8 wherein the first packing means (e) includes, at least one annular packing member, and a compression spring biasing the packing member into sealing engagement with the valve stem (d) (i) and lining (b) within the collar (b) (ii) through which the valve stem (d) (i) passes, and wherein the second packing means (f) includes, at least one annular packing member, and a compression spring biasing the packing member into sealing engagement with the boss formed of the plastic resin encapsulating the disc (d) and lining (b) within the collar (b) (ii) through which the pivot pin (d) (ii) passes.

Claim 16

The invention of claim 13 wherein the annular packing members include a plurality of annular rings of wedge shape cross-section.

Claim 17

A butterfly valve including, a. a body member having, i. a cylindrical bore, ii. diametrically opposed openings communicating with said bore, and iii. an inwardly-facing annular groove centrally formed in the wall of the bore (a) (i), the axis of the annulus of which is coextensive with the axis of the bore (a) (i), b. a fluorocarbon resin lining seated within the cylindrical bore of the body (a) defining a flow passage therethrough, and having i. end flanges extending radially over the ends of the body (a), and ii. diametrically opposed collars extending from the outer surface of and about apertures formed in the lining (b), engaging within the opposed openings (a) (ii) of the body member (a), c. a disc, encapsulated with fluorocarbon resin, pivotally mounted within the lining (b) and body member (a) for movement into and out of a position in a plane transverse to the flow passage of the lining (b), d. said disc (c) being pivotally mounted by means of, i. a valve stem rigidly secured to the disc and projecting through one of the collars (b) (ii) and openings (a) (ii), and ii. a pivot pin secured to the body (a) projecting through the other of the collars (b) (ii) and openings (a) (ii) and engaging a socket formed in the disc (c), said socket including a boss formed of the fluorocarbon resin encapsulating the disc receivably engaging about said pivot pin, e. first packing means disposed between and for sealing between the valve stem (d) (i) and the collar (b) (ii) through which said stem projects, the first packing means more specifically including, i. at least one annular packing member, and ii. a compression spring biasing the packing member (e) (i) into sealing engagement with the valve stem (d) (i) and lining (b) within the collar (b) (ii) through which the valve stem (d) (i) passes, f. second packing means disposed between and for sealing between the boss formed of the fluorocarbon resin encapsulating the disc and the collar (b) (ii) through which the pivot pin (d) (ii) projects, said second packing means more specifically including, i. at least one annular packing member, and ii. a compression spring biasing the packing member into sealing engagement with the boss formed of the fluorocarbon resin encapsulating the disc (d) and lining (b) within the collar (b) (ii) through which the pivot pin (d) (ii) passes, and g. a resilient seat member having i. an annular, ring-like portion disposed within the groove (a) (iii) and between the body (a) and the lining (b) and ii. two diametrically opposed collars integrally formed with the ring-like portion (g) (ii), each collar engaging about one of the lininG collars (b) (ii), the resilient seat member yieldably urging the lining (b) into engagement with the disc (c) when said disc is in a position in a plane transverse to the flow passage of the lining (b).

Claim 18

A butterfly valve including, a. a body member having, i. a cylindrical bore, ii. diametrically opposed openings communicating with said bore, and iii. an inwardly-facing annular groove centrally formed in the wall of the bore (a) (i), the axis of the annulus of which is coextensive with the axis of the bore (a) (i), b. a fluorocarbon resin lining seated within the cylindrical bore of the body (a) defining a flow passage therethrough, and having i. end flanges extending radially over the ends of the body (a), and ii. diametrically opposed collars extending from the outer surface of and about apertures formed in the lining (b), engaging within the opposed openings (a) (ii) of the body member (a), c. a disc, encapsulated with fluorocarbon resin, pivotally mounted within the lining (b) and body member (a) for movement into and out of a position in a plane transverse to the flow passage of the lining (b), d. said disc (c) being pivotally mounted by means of, i. a valve stem rigidly secured to the disc and projecting through one of the collars (b) (ii) and openings (a) (ii), and ii. a pivot pin secured to the body (a) projecting through the other of the collars (b) (ii) and openings (a) (ii) and engaging a socket formed in the disc (c), said socket including a boss formed of the fluorocarbon resin encapsulating the disc receivably engaging about said pivot pin, e. first packing means disposed between and for sealing between the valve stem (d) (i) and the collar (b) (ii) through which said stem projects, the first packing means more specifically including, i. at least one annular packing member, and ii. a compression spring biasing the packing member (e) (i) into sealing engagement with the valve stem (d) (i) and lining (b) within the collar (b) (ii) through which the valve stem (d) (i) passes, f. second packing means disposed between and for sealing between the boss formed of the fluorocarbon resin encapsulating the disc and the collar (b) (ii) through which the pivot pin (d) (ii) projects, said second packing means more specifically including, i. at least one annular packing member, and ii. a compression spring biasing the packing member into sealing engagement with the boss formed of the fluorocarbon resin encapsulating the disc (d) and lining (b) within the collar (b) (ii) through which the pivot pin (d) (ii) passes, and g. a resilient seat member having i. an annular, ring-like portion disposed within the groove (a) (iii) and between the body (a) and the lining (b) and ii. two diametrically opposed collars integrally formed with the ring-like portion (g) (ii), each collar engaging about one of the lininG collars (b) (ii), the resilient seat member yieldably urging the lining (b) into engagement with the disc (c) when said disc is in a position in a plane transverse to the flow passage of the lining (b).

Claim 19

The invention of claim 15 wherein two parallel annular ribs are formed on the outer surface of the lining (b) to engage the sidewalls of the groove (a) (iii) of the valve body (a) such that the resilient seat member (g) is retained between said ribs and within the groove (a) (iii).

Claim 20

The invention of claim 16 wherein a plurality of spaced holes are provided in the ribs formed on the outer surface of the lining (b), and spaced tips are formed on the resilient seat member (g) engaging the holes of the ribs to restrict movement of the resilient seat.

Claim 21

The invention of claim 15 wherein the lining (b) tapers outwardly to a larger thickness from a point adjacent the resilient seat member (g) to the end flanges (b) (i) thereof.