Self-holding tube end closures

Claim 2

A self holding closure for the end of a tube having a rectangular cross section, characterized by: A. a base having sides of substantially the same rectangular outline as the tube, said base having a surface which faces in one direction and is normal to said sides, and said surface being adapted for flush abutting engagement with the end of a rectangular cross section tube; B. a pair of locating elements on opposite portions of the base and extending in said direction beyond said surface for engagement with internal wall surfaces of a rectangular cross section tube having the closure applied thereto so as to hold the base with said sides thereof in coincidence with those of the tube; C. an elongated stem fixed to the base and extending therefrom in said direction a substantial distance beyond said surface so as to be received within the end portion of a rectangular cross section tube having the closure applied thereto; D. an anchor disc coaxially carried by the stem at its end remote from the base and having a number of resilient barb-like fingers on its periphery to engage internal wall surfaces of a rectangular cross section tube having the closure applied thereto and hold it against displacement from the tube; E. means so securing the disc to the stem as to preclude relative axial movement therebetween while providing for rotary movement of the base relative to the disc to whatever attitude is necessary for proper entrance of the locating elements thereon into the end of the tube during final assembling motion of the closure thereon; F. and the locating elements, stem and anchor disc constituting the sole structure extending beyond said surface of the base.

Claim 3

A self holding closure for the end of a tube having a rectangular cross section, comprising: A. a base having sides of substantially the same rectangular outline as the tube, said base having a surface which faces in one direction and is normal to said sides, and said surface being adapted for flush abutting engagement with the end of a rectangular cross section tube; B. a pair of locating elements on opposite portions of the base and extending in said direction beyond said surface for engagement with internal wall surfaces of a rectangular cross section tube having the closure applied thereto so as to hold the base with said sides thereof in coincidence with those of the tube; C. an elongated stem fixed to the base and extending therefrom in said direction a substantial distance beyond said surface so as to be received within the end portion of a rectangular cross section tube having the closure applied thereto; D. an anchor disc coaxially carried by the stem at its end remote from the base and having a number of resilient barb-like fingers on its periphery to engage internal wall surfaces of a rectangular cross section tube having the closure applied thereto and hold it against displacement from the tube; E. means so securing the disc to the stem as to preclude relative axial movement therebetween while providing for rotary movement of the base relative to the disc to whatever attitUde is necessary for proper entrance of the locating elements thereon into the end of the tube during final assembling motion of the closure thereon; F. and wherein said locating elements comprise posts which have their axes parallel to that of the stem and which are located adjacent to diametrically opposite corner portions of the base to be engageable within opposite corner portions of the rectangular cross section tube.

Claim 4

A self holding closure for the end of a tube having a rectangular cross section, comprising: A. a base having sides of substantially the same rectangular outline as the tube, said base having a surface which faces in one direction and is normal to said sides, and said surface being adapted for flush abutting engagement with the end of a rectangular cross section tube; B. a pair of locating elements on opposite portions of the base and extending in said direction beyond said surface for engagement with internal wall surfaces of a rectangular cross section tube having the closure applied thereto so as to hold the base with said sides thereof in coincidence with those of the tube; C. an elongated stem fixed to the base and extending therefrom in said direction a substantial distance beyond said surface so as to be received within the end portion of a rectangular cross section tube having the closure applied thereto; D. an anchor disc coaxially carried by the stem at its end remote from the base and having a number of resilient barb-like fingers on its periphery to engage internal wall surfaces of a rectangular cross section tube having the closure applied thereto and hold it against displacement from the tube; E. means so securing the disc to the stem as to preclude relative axial movement therebetween while providing for rotary movement of the base relative to the disc to whatever attitUde is necessary for proper entrance of the locating elements thereon into the end of the tube during final assembling motion of the closure thereon; F. and wherein said locating elements comprise posts which have their axes parallel to that of the stem and which are located adjacent to diametrically opposite corner portions of the base to be engageable within opposite corner portions of the rectangular cross section tube.

Claim 5

A self holding closure for the end of a tube having a rectangular cross section, comprising: A. a base having sides of substantially the same rectangular outline as the tube, said base having a surface which faces in one direction and is normal to said sides, and said surface being adapted for flush abutting engagement with the end of a rectangular cross section tube; B. a pair of locating posts on opposite portions of the base and extending in said direction beyond said surface for engagement with internal wall surfaces of a rectangular cross section tube having the closure applied thereto so as to hold the base with said sides thereof in coincidence with those of the tube; C. an elongated stem fixed to the base and extending therefrom in said direction a substantial distance beyond said surface so as to be received within the end portion of a rectangular cross section tube having the closure applied thereto; D. an anchor disc coaxially carried by the stem at its end remote from the base and having a number of resilient barb-like fingers on its periphery to engage internal wall surfaces of a rectangular cross section tube having the closure applied thereto and hold it against displacement from the tube; E. means so securing the disc to the stem as to preclude relative axial movement therebetween while providing for rotary movement of the base relative to the disc to whatever attitude is necessary for proper entrance of the locating elements thereon into the end of the tube during final assembling motion of the closure thereon; F. and wherein said base comprises a substantially thin rectangular plate having the stem and posts fixed directly to one face thereof, and said one face of the plate providing said surface which is adapted for flush abutting engagement with the end of a rectangular cross section tube.

Claim 6

A self holding closure for the end of a tube having a rectangular cross section, comprising: A. a base having sides of substantially the same rectangular outline as the tube, said base having a surface which faces in one direction and is normal to said sides, and said surface being adapted for flush abutting engagement with the end of a rectangular cross section tube; B. a pair of locating posts on opposite portions of the base and extending in said direction beyond said surface for engagement with internal wall surfaces of a rectangular cross section tube having the closure applied thereto so as to hold the base with said sides thereof in coincidence with those of the tube; C. an elongated stem fixed to the base and extending therefrom in said direction a substantial distance beyond said surface so as to be received within the end portion of a rectangular cross section tube having the closure applied thereto; D. an anchor disc coaxially carried by the stem at its end remote from the base and having a number of resilient barb-like fingers on its periphery to engage internal wall surfaces of a rectangular cross section tube having the closure applied thereto and hold it against displacement from the tube; E. means so securing the disc to the stem as to preclude relative axial movement therebetween while providing for rotary movement of the base relative to the disc to whatever attitude is necessary for proper entrance of the locating elements thereon into the end of the tube during final assembling motion of the closure thereon; F. and wherein said base comprises a substantially thin rectangular plate having the stem and posts fixed directly to one face thereof, and said one face of the plate providing said surface which is adapted for flush abutting engagement with the end of a rectangular cross section tube.

Claim 7

A self holding closure for the end of a tube having a rectangular cross section, comprising: A. a base having sides of substantially the same rectangular outline as the tube, said base having a surface which faces in one direction and is normal to said sides, and said surface being adapted for flush abutting engagement with the end of a rectangular cross section tube; B. a pair of locating elements on opposite portions of the base and extending in said direction beyond said surface for engagement with internal wall surfaces of a rectangular cross section tube having the closure applied thereto so as to hold the base with said sides thereof in coincidence with those of the tube; C. an elongated stem fixed to the base and extending therefrom in said direction a substantial distance beyond said surface so as to be received within the end portion of a rectangular cross section tube having the closure applied thereto; D. an anchor disc coaxially carried by the stem at its end remote from the base and having a number of resilient barb-like fingers on its periphery to engage internal wall surfaces of a rectangular cross section tube having the closure applied thereto so as to hold it against displacement from the tube; E. means so securing the disc to the stem as to preclude relative axial movement therebetween while providing for rotary movement of the base relative to the disc to whatever attitude is necessary for proper entrance of the locating elements thereon into the end of the tube during final assembling motion of the closure thereon; F. and wherein said locating elements comprise elongated parallel ribs which are adapted to lengthwise engage the internal surfaces of two opposite walls of the rectangular cross section tube.

Claim 8

A self holding closure for the end of a tube having a rectangular cross section, comprising: A. a base having sides of substantially the same rectangular outline as the tube, said base having a surface which faces in one direction and is normal to said sides, and said surface being adapted for flush abutting engagement with the end of a rectangular cross section tube; B. a pair of locating elements on opposite portions of the base and extending in said direction beyond said surface for engagement with internal wall surfaces of a rectangular cross section tube having the closure applied thereto so as to hold the base with said sides thereof in coincidence with those of the tube; C. an elongated stem fixed to the base and extending therefrom in said direction a substantial distance beyond said surface so as to be received within the end portion of a rectangular cross section tube having the closure applied thereto; D. an anchor disc coaxially carried by the stem at its end remote from the base and having a number of resilient barb-like fingers on its periphery to engage internal wall surfaces of a rectangular cross section tube having the closure applied thereto so as to hold it against displacement from the tube; E. means so securing the disc to the stem as to preclude relative axial movement therebetween while providing for rotary movement of the base relative to the disc to whatever attitude is necessary for proper entrance of the locating elements thereon into the end of the tube during final assembling motion of the closure thereon; F. and wherein said locating elements comprise elongated parallel ribs which are adapted to lengthwise engage the internal surfaces of two opposite walls of the rectangular cross section tube.

Claim 9

A self holding closure for the end of a tube having a rectangular cross section, comprising: A. a base having sides of substantially the same rectangular outline as the tube, said base having a surface which faces in one direction and is normal to said sides, and said surface being adapted for flush abutting engagement with the end of a rectangular cross section tube; B. a pair of locating elements on opposite portions of the base and extending in said direction beyond said surface for engagement with internal wall surfaces of a rectangular cross section tube having the closure applied thereto so as to hold the base with said sides thereof in coincidence with those of the tube; C. an elongated stem fixed to the base and extending therefrom in said direction a substantial distance beyond said surface so as to be received within the end portion of a rectangular cross section tube having the closure applied thereto; D. an anchor disc coaxially carried by the stem at its end remote from the base and having a number of resilient barb-like fingers on its periphery to engage internal wall surfaces of a rectangular cross section tube having the closure applied thereto and hold it against displacement from the tube; E. means so securing the disc to the stem as to preclude relative axial movement therebetween while providing for rotary movement of the base relative to the disc to whatever attitude is necessary for proper entrance of the locating elements thereon into the end of the tube during final assembling motion of the closure thereon; F. said base having a cubical shape corresponding to the dimensions of a square cross section tube; G. and the base having said locating elements, stems, and anchor discs thereon at a plurality of sides thereof.

Claim 10

A self holding closure for the end of a tube having a rectangular cross section, comprising: A. a base having sides of substantially the same rectangular outline as the tube, said base having a surface which faces in one direction and is normal to said sides, and said surface being adapted for flush abutting engagement with the end of a rectangular cross section tube; B. a pair of locating elements on opposite portions of the base and extending in said direction beyond said surface for engagement with internal wall surfaces of a rectangular cross section tube having the closure applied thereto so as to hold the base with said sides thereof in coincidence with those of the tube; C. an elongated stem fixed to the base and extending therefrom in said direction a substantial distance beyond said surface so as to be received within the end portion of a rectangular cross section tube having the closure applied thereto; D. an anchor disc coaxially carried by the stem at its end remote from the base and having a number of resilient barb-like fingers on its periphery to engage internal wall surfaces of a rectangular cross section tube having the closure applied thereto and hold it against displacement from the tube; E. means so securing the disc to the stem as to preclude relative axial movement therebetween while providing for rotary movement of the base relative to the disc to whatever attitude is necessary for proper entrance of the locating elements thereon into the end of the tube during final assembling motion of the closure thereon; F. said base having a cubical shape corresponding to the dimensions of a square cross section tube; G. and the base having said locating elements, stems, and anchor discs thereon at a plurality of sides thereof.

Claim 11

The self holding closure of claim 5, further characterized by: A. said cubically shaped base being hollow and open at one side; B. one of said stems projecting out of the open side of the base from the wall thereof at the opposite side of the base; C. and reinforcing ribs joining opposite sides of the stem with two opposite side walls of the base in the interior thereof.