Pipe connector
First Claim
Patent Images
1. A snap connector for pipes comprising:
- a cylindrical pin having a frustoconical outer surface, one end thereof securable to a pipe, and the other end open;
a cylindrical box having a frustoconical inner surface, one end securable to a pipe, the other end open, and telescopically engageable with said pin;
a first helical thread form on the outer surface of said pin;
a second helical thread form on the inner surface of said box;
each of said thread forms having a crest of discreet axial length, a rounded root, and an abutting flank facing away from the open end, the surface of each of said crests being said frustoconical surface of said pin and said box respectively;
each of said pin and box having a secondary radially extending surface facing toward the open end;
means for circumferentially aligning said pin and box for correct axial stabbing, such that the distance from said secondary radially extending surface of said pin to a point on an abutting flank of said pin equals the distance from said secondary radially extending surface of said box to a point on an abutting flank of said box at the same axial and circumferential location, whereby when fully engaged both the abutting flanks of the pin and box and the secondary radially extending surfaces are in axially compressive abutment; and
the width of said crests so related to the frustoconical taper that when stabbing in the circumferentially aligned position, initial contact is made radially between said crests of said first helical thread form and said crests of said second helical thread form, whereby the connector is forced into snap engagement without rotation.
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Accused Products
Abstract
A pipe connector with helically threaded (49, 57) frustoconical pin (10) and box (30) surfaces. The connector is axially (78) snapped together, but is rotated for disengagement. Centralizing surfaces (150, 152) on each thread form abut opposing crests (62, 54) to maintain concentrically, thereby detering disengagement under bending moments.
126 Citations
14 Claims
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1. A snap connector for pipes comprising:
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a cylindrical pin having a frustoconical outer surface, one end thereof securable to a pipe, and the other end open; a cylindrical box having a frustoconical inner surface, one end securable to a pipe, the other end open, and telescopically engageable with said pin; a first helical thread form on the outer surface of said pin; a second helical thread form on the inner surface of said box; each of said thread forms having a crest of discreet axial length, a rounded root, and an abutting flank facing away from the open end, the surface of each of said crests being said frustoconical surface of said pin and said box respectively; each of said pin and box having a secondary radially extending surface facing toward the open end; means for circumferentially aligning said pin and box for correct axial stabbing, such that the distance from said secondary radially extending surface of said pin to a point on an abutting flank of said pin equals the distance from said secondary radially extending surface of said box to a point on an abutting flank of said box at the same axial and circumferential location, whereby when fully engaged both the abutting flanks of the pin and box and the secondary radially extending surfaces are in axially compressive abutment; and the width of said crests so related to the frustoconical taper that when stabbing in the circumferentially aligned position, initial contact is made radially between said crests of said first helical thread form and said crests of said second helical thread form, whereby the connector is forced into snap engagement without rotation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A snap connector for pipes comprising:
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a cylindrical pin having a frustoconical outer surface, one end thereof securable to a pipe, and the other end open; a cylindrical box having a frustoconical inner surface, one end securable to a pipe, the other end open, and telescopically engageable with said pin; a first substantially circumferential thread form on the outer surface of said pin; a second substantially circumferential thread form on the inner surface of said box; each of said thread forms having a crest of discreet axial length, a rounded root, and an abutting flank facing away from the open end; each of said pin and box having a secondary radially extending surfacing toward the open end; said pin and box alignable and dimensionally sized such that the distance from said secondary radially extending surface of said pin to a point on an abutting flank of said pin equals the distance from said secondary radially extending surface of said box to a point on an abutting flank of said box at the same axial and circumferential location, whereby, when fully engaged in the overlap condition both the abutting flanks of the pin and box and the secondary radially extending surfaces are in axially compressive abutment; the length of said crests so related to the frustoconical taper that when stabbing initial contact is made between said crests; an axially extending centralizer surface radially located between the crest and root of at least one of each of said thread forms; and said pin and box sized such that the centralizing surfaces contact the crest of the thread form of the opposing box or pin members in the overlap condition. - View Dependent Claims (12, 13)
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14. A snap connector for pipes comprising:
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a cylindrical pin having a frustoconical outer surface, one end thereof securable to a pipe, and the other end open; a cylindrical box having a frustoconical inner surface, one end securable to a pipe, the other end open, and telescopically engageable with said pin; a first helical thread form on the outer surface of said box; a second helical thread form on the inner surface of said box; each of said thread forms having a crest of discreet axial length, a rounded root, and an abutting flank facing away from the open end, the radial dimension of the edge toward the open end of each individual crest is not greater than the radial dimension of the largest radial dimension of the adjacent crest which is toward the open end, whereby any mating crest cleared by the adjacent crest during stabbing will be cleared by the edge of the corresponding individual crest; each of said pin and box having a secondary radially extending surface facing toward the open end; means for circumferentially aligning said pin and box for correct axial stabbing, such that the distance from said secondary radially extending surface of said pin to a point on an abutting flank of said pin equals the distance from said secondary radially extending surface of said box to a point on an abutting flank of said box at the same axial and circumferential location, whereby when fully engaged both the abutting flanks of the pin and box and the secondary radially extending surfaces are in axially compressive abutment; and the width of said crests so related to the frustoconical taper that when stabbing in the circumferentially aligned position, initial contact is made radially between said crests of said first helical thread form and said crests of said second helical thread form, whereby the connector is forced into snap engagement without rotation.
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Specification