Connecting device for pipings, pipes and conduits

Claim 2

A crimping connecting accessory for connecting rigid pipings, comprising an unthreaded sleeve having: a tail section including a first malleable portion for a first connection of the radial crimping type onto the outer periphery of an end of a first pipe; and a head section including a second portion of higher hardness than said first malleable portion for a second connection of the dismountable type into a female member attached to an outer periphery of an end of a second pipe, said head section being of a larger diameter than said tail section, said tail section and said head section being joined to one another to form a single metal piece, wherein: said first malleable portion comprises at least one zone for radial crimping onto an end piping and means for preventing said malleable portion from rotating with respect to said pipe on which it is crimped.

Claim 3

A crimping connecting accessory for connecting rigid pipings, comprising an unthreaded sleeve having: a tail section including a first malleable portion for a first connection of the radial crimping type onto the outer periphery of an end of a first pipe; and a head section including a second portion of higher hardness than said first malleable portion for a second connection of the dismountable type into a female member attached to an outer periphery of an end of a second pipe, said head section being of a larger diameter than said tail section, said tail section and said head section being joined to one another to form a single metal piece, wherein: said head section defines a sealing zone having a second malleable portion; and said second malleable portion defines a lateral convex surface, a member of hard material, distinct from said lateral concave surface, being fixed onto said lateral convex surface of said second malleable portion.

Claim 4

A crimping connecting accessory for connecting rigid pipings, comprising an unthreaded sleeve having: a tail section including a first malleable portion for a first connection of the radial crimping type onto the outer periphery of an end of a first pipe; and a head section including a second portion of higher hardness than said first malleable portion for a second connection of the dismountable type into a female member attached to an outer periphery of an end of a second pipe, said head section being of a larger diameter than said tail section, said tail section and said head section being joined to one another to form a single metal piece, wherein: said head section defines a sealing zone having a second malleable portion; and said second malleable portion defines a lateral convex surface, a member of hard material, distinct from said lateral concave surface, being fixed onto said lateral convex surface of said second malleable portion.

Claim 5

A crimping connecting accessory for connecting rigid pipings, comprising an unthreaded sleeve having: a tail section including a first malleable portion for a first connection of the radial crimping type onto the outer periphery of an end of a first pipe; and a head section including a second portion of higher hardness than said first malleable portion for a second connection of the dismountable type into a female member attached to an outer periphery of an end of a second pipe, said head section being of a larger diameter than said tail section, said tail section and said head section being joined to one another to form a single metal piece, wherein: an annular groove is outwardly formed in said first malleable portion, a reamed spherical segment of hard material being received and fixed in said annular groove.

Claim 6

A crimping connecting accessory for connecting rigid pipings, comprising an unthreaded sleeve having: a tail section including a first malleable portion for a first connection of the radial crimping type onto the outer periphery of an end of a first pipe; and a head section including a second portion of higher hardness than said first malleable portion for a second connection of the dismountable type into a female member attached to an outer periphery of an end of a second pipe, said head section being of a larger diameter than said tail section, said tail section and said head section being joined to one another to form a single metal piece, wherein: an annular groove is outwardly formed in said first malleable portion, a reamed spherical segment of hard material being received and fixed in said annular groove.

Claim 7

A crimping connecting accessory for connecting rigid pipings, comprising an unthreaded sleeve having: a tail section including a first malleable portion for a first connection of the radial crimping type onto the outer periphery of an end of a first pipe; and a head section including a second portion of higher hardness than said first malleable portion for second connection of the dismountable type into a female member attached to an outer periphery of an end of a second pipe, said head section being of a larger diameter than said tail section, said tail section and said head section being joined to one another to form a single metal piece, wherein: said head and said tail sections are formed with complementary assembling collars, said collars defining surfaces along which said complementary assembling collars are fixed to one another.

Claim 8

A crimping connecting accessory for connecting rigid pipings, comprising an unthreaded sleeve having: a tail section including a first malleable portion for a first connection of the radial crimping type onto the outer periphery of an end of a first pipe; and a head section including a second portion of higher hardness than said first malleable portion for second connection of the dismountable type into a female member attached to an outer periphery of an end of a second pipe, said head section being of a larger diameter than said tail section, said tail section and said head section being joined to one another to form a single metal piece, wherein: said head and said tail sections are formed with complementary assembling collars, said collars defining surfaces along which said complementary assembling collars are fixed to one another.

Claim 9

A crimping connecting accessory for connecting rigid pipings, comprising an unthreaded sleeve having: a tail section including a first malleable portion for a first connection of the radial crimping type onto the outer periphery of an end of a first pipe; and a head section including a second portion of higher hardness than said first malleable portion for a second connection of the dismountable type into a female member attached to an outer periphery of an end of a second pipe, said head section being of a larger diameter than said tail section, said tail section and said head section being joined to one another to form a single metal piece, wherein: said first malleable portion is monolithic with said second portion of higher hardness and is developed on said accessory which is originally entirely hard.

Claim 10

A crimping connecting accessory for connecting rigid pipings, comprising an unthreaded sleeve having: a tail section including a first malleable portion for a first connection of the radial crimping type onto the outer periphery of an end of a first pipe; and a head section including a second portion of higher hardness than said first malleable portion for a second connection of the dismountable type into a female member attached to an outer periphery of an end of a second pipe, said head section being of a larger diameter than said tail section, said tail section and said head section being joined to one another to form a single metal piece, wherein: said first malleable portion is monolithic with said second portion of higher hardness and is developed on said accessory which is originally entirely hard.

Claim 11

A crimping connecting accessory for connecting rigid pipings, comprising an unthreaded sleeve having: a tail section including a first malleable portion for a first connection of the radial crimping type onto the outer periphery of an end of a first pipe; and a head section including a second portion of higher hardness than said first malleable portion for a second connection of the dismountable type into a female member attached to an outer periphery of an end of a second pipe, said head section being of a larger diameter than said tail section, said tail section and said head section being joined to one another to form a single metal piece, wherein: said first malleable portion is monolithic with said second portion of higher hardness and is obtained on said accessory by localized overquenching a zone within said head section, which lowers the elastic limit in said zone of the accessory.

Claim 12

A crimping connecting accessory for connecting rigid pipings, comprising an unthreaded sleeve having: a tail section including a first malleable portion for a first connection of the radial crimping type onto the outer periphery of an end of a first pipe; and a head section including a second portion of higher hardness than said first malleable portion for a second connection of the dismountable type into a female member attached to an outer periphery of an end of a second pipe, said head section being of a larger diameter than said tail section, said tail section and said head section being joined to one another to form a single metal piece, wherein: said first malleable portion is monolithic with said second portion of higher hardness and is obtained on said accessory by localized overquenching a zone within said head section, which lowers the elastic limit in said zone of the accessory.

Claim 13

A pipe coupling element for connecting rigid pipes, comprising: a first end portion and a second end portion, said first end portion being connected to said second end portion and being integral therewith, said first end portion comprising a malleable material and thereby constituting means for forming a first connection of the radial crimping type onto an outer periphery of an end of a first pipe, said second end portion comprising a material having a higher hardness than said malleable material, said second end portion having a male element and constituting means for providing a second connection of the dismountable type into a female member attached to an outer periphery of an end of a second pipe, said higher hardness material imparting to said male element sufficient rigidity to prevent collapse thereof when said second end portion is subjected to use as said second connection of the dismountable type, wherein: said malleable material is monolithic with said higher hardness material and is obtained by localized overquenching.

Claim 14

A pipe coupling element for connecting rigid pipes, comprising: a first end portion and a second end portion, said first end portion being connected to said second end portion and being integral therewith, said first end portion comprising a malleable material and thereby constituting means for forming a first connection of the radial crimping type onto an outer periphery of an end of a first pipe, said second end portion comprising a material having a higher hardness than said malleable material, said second end portion having a male element and constituting means for providing a second connection of the dismountable type into a female member attached to an outer periphery of an end of a second pipe, said higher hardness material imparting to said male element sufficient rigidity to prevent collapse thereof when said second end portion is subjected to use as said second connection of the dismountable type, wherein: said malleable material is monolithic with said higher hardness material and is obtained by localized overquenching.