Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
320 words
A shut-off valve comprising a tubular valve body, having a larger diameter upstream bore defining an inlet and a smaller diameter downstream bore centrally communicating with said upstream bore and defining an outlet and an upstream facing annular valve seat, a valve member including a disc-shape valve plug of a diameter intermediate the diameters of said upstream and downstream bores, and formed with an upstream projecting axial pin, said valve member entirely located within said upstream bore and freely supported on said valve seat and movable between valve-opening and valve-closing positions, said valve plug having a downstream face facing said valve seat, one of said valve seat and said downstream face having a circular groove, an O-ring seal positioned and mechanically retained in said groove and making sealing contact with one of said downstream face and valve seat, respectively, in the valve-closing position of said valve member; an operant cylindrical shaft removably extending transversely of said valve body across and exposed within said upstream bore, said shaft lying in a plance parallel to the plane of said valve seat and laterelly offset from the longitudinal axis of said bores, said shaft having an end projecting from said tubular valve body and movable relative to said body and valve member by a force applied to said projecting end, means to releasably retain said shaft in said valve body, sealing means between said shaft and said valve body at both sides of said upstream bore, said shaft having a central portion of reduced diameter, defining a cam surface merging with the full diameter surface of said shaft, said cam surface and said full diameter shaft surface selectively (engageable with) slidably contacting said (valve member) axial pin upon movement of said shaft in said valve body to permit said valve member to take its valve-closing position under liquid pressure and to tilt said valve plug on its valve seat to valve-opening position respectively.
Claim 2
Dependent Claim
320 words
A shut-off valve comprising a tubular valve body, having a larger diameter upstream bore defining an inlet and a smaller diameter downstream bore centrally communicating with said upstream bore and defining an outlet and an upstream facing annular valve seat, a valve member including a disc-shape valve plug of a diameter intermediate the diameters of said upstream and downstream bores, and formed with an upstream projecting axial pin, said valve member entirely located within said upstream bore and freely supported on said valve seat and movable between valve-opening and valve-closing positions, said valve plug having a downstream face facing said valve seat, one of said valve seat and said downstream face having a circular groove, an O-ring seal positioned and mechanically retained in said groove and making sealing contact with one of said downstream face and valve seat, respectively, in the valve-closing position of said valve member; an operant cylindrical shaft removably extending transversely of said valve body across and exposed within said upstream bore, said shaft lying in a plance parallel to the plane of said valve seat and laterelly offset from the longitudinal axis of said bores, said shaft having an end projecting from said tubular valve body and movable relative to said body and valve member by a force applied to said projecting end, means to releasably retain said shaft in said valve body, sealing means between said shaft and said valve body at both sides of said upstream bore, said shaft having a central portion of reduced diameter, defining a cam surface merging with the full diameter surface of said shaft, said cam surface and said full diameter shaft surface selectively (engageable with) slidably contacting said (valve member) axial pin upon movement of said shaft in said valve body to permit said valve member to take its valve-closing position under liquid pressure and to tilt said valve plug on its valve seat to valve-opening position respectively.
Claim 3
Dependent Claim
54 words
A shut-off valve as defined in claim 1, wherein said operant shaft is rotatably mounted in said valve body and said cam surface includes a surface portion of progressively-increasing radius relative to the shaft axis, and further including a handle fixed to the projecting end of said shaft and generally perpendicular to the latter.
Claim 4
Dependent Claim
41 words
A shut-off valve as defined in claim 1, wherein said shaft is longitudinally slidable in said valve body and both its ends project from said valve body and said cam surface is in the form of two inwardly-converging, generally conical portions.
Claim 5
Dependent Claim
33 words
A shut-off valve as defined in claim 1, wherein said circular groove has a radially inner side defined by a lip, said lip punched in over said O-ring and partially overlying the latter.
Claim 6
Dependent Claim
22 words
A shut-off valve as defined in claim 4, wherein said circular groove is made in the downstream face of said valve plug.