Valve seat puller

Claim 2

A valve seat puller for removing a rimmed valve seat from a pump or the like, comprising a pluality of equally spaced J-shaped hooks adapted for limited pivotal movement about one end having a T-shaped head, the other ends of which have a J-shaped head adapted for passing through the rimmed valve seat and pivoting outwardly to engage the lower rim surface of the valve seat, a hook support plate spaced above the valve seat and having a plurality of radial slots disposed therein communicating with the periphery of said plate for receiving said J-shaped hooks with said T-shaped end of said J-shaped hooks pivotally engaging the upper surface of said plate, said plate having a central aperture therethrough, an elongaged pump support plate engaging the pump housing and spaced above said circular hook support plate and having a central aperture therethrough, a threaded rod, one end of which projects through said aperture in said circular hook support plate and depends therefrom, the other end of which projects through said aperture of said pump support plate and extends upwardly above said plate, a locking nut threadably attachable to said one end of said threaded rod and engaging the lower surface of said hook support plate for supporting said plate and J-shaped hooks, and drive means cooperating with said threaded rod and pump support plate for supporting said hook support plate and J-shaped hooks in engaging contact with the valve seat and providing upward axial movement of said threaded rod for exerting a lifting force on said J-shaped hooks.

Claim 3

The valve seat puller as described in claim 1, wherein said drive means comprises means for engaging said other end of said threaded rod for rotating said rod through said hook support plate and pump support plate, and a drive nut threadably attachable to said other end of said threaded rod and engaging the upper surface of said pump support plate for supporting said hook support plate and J-shaped hooks and translating rotary motion of said threaded rod into upward axial rod motion for exerting a lifting force on said J-shaped hooks.

Claim 4

The valve seat puller as described in claim 2, wherein said threads on said threaded rod engaging said drive nut are of a coarser pitch than the threads of said threaded rod engaging said locking nut for multiplying the lifting force exerted on said J-shaped hooks in relation to the driving force applied to said threaded rod.

Claim 5

The valve seat puller as described in claim 1, wherein said drive means comprises a drive nut threadably attachable to said other end of said threaded rod and engaging the upper surface of said pump support plate, and nut driving means for engaging and rotating said drive nut and translating rotary motion of said drive nut into upward axial motion of said threaded rod for exerting a lifting force on said J-shaped hooks.

Claim 6

The valve seat puller as described in claim 4, wherein said threads on said threaded rod engaging said drive nut are of a coarser pitch than the threads of said threaded rod engaging said locking nut for multiplying the lifting force exerted on said J-shaped hooks in relation to the driving force applied to said drive nut.

Claim 7

The valve seat puller as described in claim 1, further including actuating means spaced below said hook support plate and threadably engaging said one end of said threaded rod and adapted for engaging said plurality of J-shaped hooks and pivoting said hooks outwardly into engaging contact with the lower rim surface of the valve seat.

Claim 8

The valve seat puller as described in claim 6, wherein said actuating means comprises a frusto-conical member having a central threaded aperture therethrough for threadably engaging said one end of said rod passing through said hook support plate, said frusto-conical member upwardly movable on said rod to permit said member's outwardly and downwardly slanting surface to engage the inner surfaces of said J-shaped hooks for pivoting said hooks outwardly into engagement with the valve seat rim and retaining said hooks in such engaged position while a lifting force is exerted.

Claim 9

A valve seat puller for removing a rimmed valve seat from a pump or the like, comprising a plurality of equally spaced J-shaped hooks adapted for limited pivotal movement about one end having a T-shaped head, the other ends of which have a J-shaped head adapted for passage through the rimmed valve seat and pivotable outwardly to engage the lower rim surface of the valve seat, a hook support plate having a plurality of radial slots disposed therein and communicating with the periphery of said plate for receiving said J-shaped hooks, said T-shaped ends of said hooks pivotally engaging the upper surface of said plate, said plate having a central aperture therethrough. an elongated pump support plate removably attachable to the pump and spaced above said hook support plate and having a central aperture therethrough, a threaded rod, one end of which passes through said hook support plate and projects below said plate, and the other end of which projects through said aperture in said pump support plate and projects above said plate, a first nut threadably attachable to said one end of said threaded rod passing through said hook support plate and engaging the lower surface of said hook support plate for supporting said plate and said J-shaped hooks, a second nut threadably attachable to said other end of said threaded rod and engaging the upper surface of said pump support plate for supporting said hook support plate and J-shaped hooks, and drive means for engaging said other end of said threaded rod for rotating said rod through said hook support plate and said pump support plate, said rotary motion of said rod being translated by said second nut into upward axial rod motion for exerting a lifting force on said hooks in engaging contact with the valve seat.

Claim 10

A valve seat puller for removing a rimmed valve seat from a pump or the like, comprising a plurality of equally spaced J-shaped hooks adapted for limited pivotal movement about one end having a T-shaped head, the other ends of which have a J-shaped head adapted for passage through the rimmed valve seat and pivotable outwardly to engage the lower rim surface of the valve seat, a hook support plate having a plurality of radial slots disposed therein and communicating with the periphery of said plate for receiving said J-shaped hooks, said T-shaped ends of said hooks pivotally engaging the upper surface of said plate, said plate having a central aperture therethrough. an elongated pump support plate removably attachable to the pump and spaced above said hook support plate and having a central aperture therethrough, a threaded rod, one end of which passes through said hook support plate and projects below said plate, and the other end of which projects through said aperture in said pump support plate and projects above said plate, a first nut threadably attachable to said one end of said threaded rod passing through said hook support plate and engaging the lower surface of said hook support plate for supporting said plate and said J-shaped hooks, a second nut threadably attachable to said other end of said threaded rod and engaging the upper surface of said pump support plate for supporting said hook support plate and J-shaped hooks, and drive means for engaging said other end of said threaded rod for rotating said rod through said hook support plate and said pump support plate, said rotary motion of said rod being translated by said second nut into upward axial rod motion for exerting a lifting force on said hooks in engaging contact with the valve seat.

Claim 11

The valve seat puller as described in claim 8, wherein said threads on said threaded rod engaging said second nut are of a coarser pitch than the threads of said threaded rod engaging said first nut for multiplying the lifting force exerted on said J-shaped hooks in relation to the driving force applied to said threaded rod.

Claim 12

The valve seat puller as described in claim 8, further including, a frusto-conical actuating member having a central threaded aperture therethrough for threadably engaging said one end of said rod passing through said hook support plate, said actuating member upwardly movable on said rod to permit said member's outwardly and downwardly slanting surface to engage the inner surfaces of said J-shaped hooks for pivoting said hooks outwardly into engagement with the valve seat rim and retaining said hooks in such engaged position while a lifting force is exerted.

Claim 13

A valve seat puller for removing a rimmed valve seat from a pump or the like, comprising a plurality of equally spaced J-shaped hooks adapted for limited pivotal movement about one end having a T-shaped head, the other ends of which have a J-shaped head adapted for passage through the rimmed valve seat and pivotable outwardly to engage the lower rim surface of the valve seat, a hook support plate having a plurality of radial slots disposed therein and communicating with the periphery of said plate for receiving said J-shaped hooks, said T-shaped ends of said hooks pivotally engaging the upper surface of said plate, said plate having a central aperture therethrough, an elongated pump support plate removably attachable to the pump and spaced above said hook support plate and having a central aperture therethrough, a threaded rod, one end of which passes through said hook support plate and projects below said plate, and the other end of which projects through said aperture in said pump support plate and projects above said plate, a first nut threadably atachable to said one end of said threaded rod passing through said hook support plate and engaging the lower surface of said hook support plate for supporting said plate and said J-shaped hooks, a second nut threadably attachable to said other end of said threaded rod and engaging the upper surface of said pump support plate for supporting said hook support plate and J-shaped hooks, and drive means for engaging and rotating said second nut about said threaded rod and translating said rotary motion of said nut.

Claim 14

A valve seat puller for removing a rimmed valve seat from a pump or the like, comprising a plurality of equally spaced J-shaped hooks adapted for limited pivotal movement about one end having a T-shaped head, the other ends of which have a J-shaped head adapted for passage through the rimmed valve seat and pivotable outwardly to engage the lower rim surface of the valve seat, a hook support plate having a plurality of radial slots disposed therein and communicating with the periphery of said plate for receiving said J-shaped hooks, said T-shaped ends of said hooks pivotally engaging the upper surface of said plate, said plate having a central aperture therethrough, an elongated pump support plate removably attachable to the pump and spaced above said hook support plate and having a central aperture therethrough, a threaded rod, one end of which passes through said hook support plate and projects below said plate, and the other end of which projects through said aperture in said pump support plate and projects above said plate, a first nut threadably atachable to said one end of said threaded rod passing through said hook support plate and engaging the lower surface of said hook support plate for supporting said plate and said J-shaped hooks, a second nut threadably attachable to said other end of said threaded rod and engaging the upper surface of said pump support plate for supporting said hook support plate and J-shaped hooks, and drive means for engaging and rotating said second nut about said threaded rod and translating said rotary motion of said nut.

Claim 15

The valve seat puller as described in claim 11, wherein said threads on said threaded rod engaging said second nut are of a coarser pitch than the threads of said threaded rod engaging said first nut for multiplying the lifting force exerted on said J-shaped hooks in relation to the driving force applied to said drive nut.

Claim 16

The valve seat puller as described in claim 11, further including a frusto-conical actuating member having a central threaded aperture therethrough for threadably engaging said one end of said rod passing through said hook support plate, said actuating member upwardly movable on said rod to permit said member's outwardly and downwardly slanting surface to engage the inner surfaces of said J-shaped hooks for pivoting said hooks outwardly into engagement with the valve seat rim and retaining said hooks in such engaged position while a lifting force is exerted.