Cutting torch tip assembly

Claim 2

A cutting torch tip assembly adapted to be assembled with a cutting torch comprising: an elongated generally cylindrical shell member having an internal passageway extending longitudinally therethrough and terminating in an inlet end and an outlet end; said passageway having a portion tapering inwardly towards and at least adjacent said outlet end, said inlet end of said shell member having a continuous circumferentially extending sealing surface; an elongated, generally cylindrical, tip insert member having an internal passage and an inlet end and an outlet end and positioned within said passageway, said insert member having adjacent its outlet end a portion of substantially identical taper to said passageway taper and adapted to engage the tapered portion of said passageway, the remaining portion of said insert being of a diameter substantially less than the diameter of the other portion of the shell passageway, an axially extending circumferential recess on the inlet end of said insert, means defining a circumferential flange surrounding said recess; and, an annular, resilient axially compressible seal member positioned in said recess having a free end portion extending outwardly of said recess and adapted to be axially compressed on assembly with a cutting torch and both bias said tapered portions into engagement and seal said insert passageway from said shell passageway.

Claim 3

The invention as defined in claim 1 wherein said seal member has a rectangular cross section.

Claim 4

The invention as defined in claim 1 wherein said flange is defined by a sleeve member slip-fitted on said insert.

Claim 5

The invention as defined in claim 1 wherein said sealing surface is generally perpendicular to the longitudinal axis of said passageway.

Claim 6

The invention as defined in claim 1 wherein said recess has a radial width greater than the radial thickness of said sealing member and said flange terminates in a radially inwardly extending lip portion.

Claim 7

The invention as defined in claim 5 wherein said flange extends a distance sufficient to enclose at least approximately one-half of the length of said resilient member.

Claim 8

The invention as defined in claim 5 wherein said resilient member has a generally rectangular cross section.

Claim 9

A tip insert member for use in a cutting torch tip assembly comprising: an elongated generally cylindrical body portion having an opening extending axially therethrough from an inlet end to an outlet end, the exterior of said body portion adjacent said outlet end being of uniformly decreasing diameter and having a plurality of longitudinally extending grooves formed therein, the inlet end of said insert having an axially extending recess formed therein and surrounding the inlet end of said opening; means defining a longitudinally extending flange surrounding said recess; and, a generally annular resilient seal member positioned within said recess and having a free end portion extending outwardly of the insert in an axial direction.

Claim 10

A tip insert member for use in a cutting torch tip assembly comprising: an elongated generally cylindrical body portion having an opening extending axially therethrough from an inlet end to an outlet end, the exterior of said body portion adjacent said outlet end being of uniformly decreasing diameter and having a plurality of longitudinally extending grooves formed therein, the inlet end of said insert having an axially extending recess formed therein and surrounding the inlet end of said opening; means defining a longitudinally extending flange surrounding said recess; and, a generally annular resilient seal member positioned within said recess and having a free end portion extending outwardly of the insert in an axial direction.

Claim 11

The invention as defined in claim 8 wherein said flange is defined by a sleeve slip-fitted on the body portion of said insert.

Claim 12

The invention as defined in claim 8 wherein said resilient seal member has a rectangular cross section.

Claim 13

The invention as defined in claim 8 wherein said recess has a radial width greater than the radial thickness of said seal member and said flange terminates in a radially inwardly extending lip portion.

Claim 14

The invention as defined in claim 11 wherein said flange extends a distance sufficient to enclose at least approximately one-half of said resilient member.

Claim 15

The invention as defined in claim 8 including at least three radial projections adjacent the free end portion adapted to engage said shell passageway adjacent the inlet end.

Claim 16

The invention as defined in claim 8 includinG a sleeve member coaxial with said longitudinally extending flange which has a generally triangularly shaped periphery, the apices of said triangle adapted to engage the inner surface of the shell member passageway adjacent the inlet end.

Claim 17

A cutting torch tip assembly adapted to be assembled with a cutting torch comprising an elongated generally cylindrical torch shell member having an internal axial passageway extending longitudinally therethrough and terminating in an inlet end and an outlet end; said passageway having a portion tapering inwardly towards and at least adjacent said outlet end, said inlet end of said shell member having a sealing surface extending circumferentially around said passageway and adapted to sealingly cooperate with a surface on said torch; an elongated generally cylindrical tip insert member having an internal passage and an inlet end and an outlet end and positioned within said shell member passageway, said insert member having a portion of substantially identical taper to said passageway taper adjacent its outlet end and adapted to engage the tapered portion of said passageway, the remaining portion of said insert being of a diameter substantially less than the diameter of the other portion of the shell passageway, the inlet end of said insert when said shell member is assembled on a cutting torch terminating short of a sealing surface on said torch whereby said insert member would have a limited amount of free axial movement relative to said shell member and axially resilient sealing means associated with the inlet end of said insert member and a surface on said cutting torch of an axial dimension greater than the free movement of said insert member whereby when said tip assembly is assembled on a cutting torch, said resilient sealing means is axially compressed and bias said tapered portions into pressure engagement.

Claim 18

A cutting torch tip assembly adapted to be assembled with a cutting torch comprising an elongated generally cylindrical torch shell member having an internal axial passageway extending longitudinally therethrough and terminating in an inlet end and an outlet end; said passageway having a portion tapering inwardly towards and at least adjacent said outlet end, said inlet end of said shell member having a sealing surface extending circumferentially around said passageway and adapted to sealingly cooperate with a surface on said torch; an elongated generally cylindrical tip insert member having an internal passage and an inlet end and an outlet end and positioned within said shell member passageway, said insert member having a portion of substantially identical taper to said passageway taper adjacent its outlet end and adapted to engage the tapered portion of said passageway, the remaining portion of said insert being of a diameter substantially less than the diameter of the other portion of the shell passageway, the inlet end of said insert when said shell member is assembled on a cutting torch terminating short of a sealing surface on said torch whereby said insert member would have a limited amount of free axial movement relative to said shell member and axially resilient sealing means associated with the inlet end of said insert member and a surface on said cutting torch of an axial dimension greater than the free movement of said insert member whereby when said tip assembly is assembled on a cutting torch, said resilient sealing means is axially compressed and bias said tapered portions into pressure engagement.

Claim 19

The improvement of claim 15 wherein said resilient seal is fastened to the inlet end of said insert member.

Claim 20

The invention as defined in claim 1 wherein said flange extends a distance sufficient to enclose at least approximately one-half of the length of said resilient member.

Claim 21

The invention as defined in claim 8 wherein said flange extends a distance sufficient to enclose at least approximately one-half of said resilient member.