US3781043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple pipe joint seal
Assignee: Individual
•
Filing: 1972-01-17
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Granted: 1973-12-25
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Expires: 1992-01-17
Abstract
Abstract A flanged, bolted pipe joint with a seal clamped between the flanges of the joint and located on the bolts of the joint. The seal has an annular body with sealing rings thereon, and with four locating fingers projecting outwardly along perpendicular diameters of the joint for locating engagement with bolts of different standard sizes on different standard bolt circles of a series of joints. One alternative form has two oppositely facing fingers for straddling in-line bolts of a standard series, and additional forms illustrate the specific application of the invention to four different ASA standard sizes of pipe joint.
Inventors
- 👤 F Hagmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:37
CPC Classifications
F; F16; F16L; F16L23/00; F16L23/16; F16L23/18; F16L23/003; F16B; F16B2200/00; F16B2200/50; F16B2200/506; Y; Y10; Y10S; Y10S285/00; Y10S285/91
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
369 words
A seal for use in each of a standard series of at least three different pressure-rated, flanged pipe joints for a pipe of a given standard sIze, wherein the joints for the different pressure ratings have at least three concentric bolt circles of predetermined diameters and bolts of predetermined diameters on the bolt circles appropriate to the corresponding pressure ratings, and wherein each joint has at least four bolts of a given bolt diameter lying on a given bolt circle and on four radial lines common to all of the joints and constituting the opposite portions of two perpendicular diameters of the joints, said seal comprising: an annular body formed with a central opening larger than the inside diameter of the pipe and having a circular outer edge smaller than the smallest of the bolt circles; means on said body for sealing each of the pipe joints around said opening when said body is clamped in the pipe joint; and four retaining fingers secured to said body and projecting generally radially outwardly therefrom in angularly spaced relation to extend along the radial lines, each of said fingers having a contoured edge facing toward the associated radial line for locating engagement with bolts of the different bolt diameters on the different bolt circles an on the associated radial line; and each such edge including: an inner arcuate section curved about a predetermined arc for extending along a portion of the circumference of the bolt on the bolt circle of the smallest diameter and substantially concentric therewith, said arcuate section curving laterally and outwardly from the radial line for abutting engagement with one of the smallest bolts, at least one intermediate section spaced laterally a greater distance from the associated radial line than said arcuate section for abutting engagement with the side of a bolt of an intermediate diameter on an intermediate bolt circle, and an outer section spaced laterally a still greater distance from the associated line for abutting engagement with the side of a bolt of a largest diameter on a largest bolt circle; two of said edges facing angularly in one direction, and the other two facing angularly in the opposite direction to block turning of said seal.
Claim 2
Dependent Claim
369 words
A seal for use in each of a standard series of at least three different pressure-rated, flanged pipe joints for a pipe of a given standard sIze, wherein the joints for the different pressure ratings have at least three concentric bolt circles of predetermined diameters and bolts of predetermined diameters on the bolt circles appropriate to the corresponding pressure ratings, and wherein each joint has at least four bolts of a given bolt diameter lying on a given bolt circle and on four radial lines common to all of the joints and constituting the opposite portions of two perpendicular diameters of the joints, said seal comprising: an annular body formed with a central opening larger than the inside diameter of the pipe and having a circular outer edge smaller than the smallest of the bolt circles; means on said body for sealing each of the pipe joints around said opening when said body is clamped in the pipe joint; and four retaining fingers secured to said body and projecting generally radially outwardly therefrom in angularly spaced relation to extend along the radial lines, each of said fingers having a contoured edge facing toward the associated radial line for locating engagement with bolts of the different bolt diameters on the different bolt circles an on the associated radial line; and each such edge including: an inner arcuate section curved about a predetermined arc for extending along a portion of the circumference of the bolt on the bolt circle of the smallest diameter and substantially concentric therewith, said arcuate section curving laterally and outwardly from the radial line for abutting engagement with one of the smallest bolts, at least one intermediate section spaced laterally a greater distance from the associated radial line than said arcuate section for abutting engagement with the side of a bolt of an intermediate diameter on an intermediate bolt circle, and an outer section spaced laterally a still greater distance from the associated line for abutting engagement with the side of a bolt of a largest diameter on a largest bolt circle; two of said edges facing angularly in one direction, and the other two facing angularly in the opposite direction to block turning of said seal.
Claim 3
Dependent Claim
69 words
A seal as defined in claim 1 in which said arcuate section merges with a second intermediate section along which the edge is substantially parallel to said radial line and extends radially outwardly at least to a second intermediate bolt circle smaller than the first intermediate bolt circle, for use in a standard series of joints having two adjacent bolt circles with bolts of the same diameter on each.
Claim 4
Dependent Claim
55 words
A seal as defined in claim 1 in which said intermediate section of said edge is straight and inclined radially outwardly and away from the associated line, and said outer section is a correspondingly inclined, straight continuation of said intermediate section, both said intermediate section and said outer section being tangent to the abutting bolts.
Claim 5
Dependent Claim
132 words
A seal as defined in claim 1 in which the standard series has two pipe joints with bolts of two different diameters on the same bolt circle, and in which the sections of said edges for locating the seal relative to the two different bolts are tangent to the larger of the bolts and spaced a predetermined distance from the smaller of the bolts when the seal is located in the optimum position in the joint, said central opening being larger than the inside diameter by an amount correlated with said predetermined distance to prevent interference with fluid flow through the joint when the seal is displaced from said optimum position by the amount permitted by the spacing of the smaller bolts said predetermined distance from the associated sections of said edges.
Claim 6
Dependent Claim
187 words
A seal as defined in claim 1 in which the standard series has two pipe joints with bolts of two different diameters on closely adjacent bolt circles with the position of the smaller of the two different bolts entirely within the position of the larger thereof, and in which said edge has a first section substantially parallel to the associated radial line And tangent to a bolt spaced radially inwardly from the smaller bolt, and a second section extending outwardly and away from the radial line from a point of intersection of said first section at the periphery of the larger bolt, said point of intersection being spaced a preselected distance from the position of the smaller bolt when the seal is located in the optimum position in the joint, and said central opening being larger than the inside diameter by an amount correlated with said predetermined distance to prevent interference with fluid flow through the joint when the seal is displaced from said optimum position by the amount permitted by the spacing of the smaller bolts said predetermined distance from the associated sections of said edges.
Claim 7
Dependent Claim
26 words
A seal as defined in claim 1 in which said fingers are arranged in oppositely facing pairs for straddling the bolts and engaging opposite sides thereof.
Claim 8
Dependent Claim
362 words
A seal for use in each of a standard series of at least three different pressure-rated, flanged pipe joints for a pipe of a given standard size, wherein the joints for different pressure ratings have at least three concentric bolt circles of different predetermined diameters and bolts of at least three different predetermined diameters on the bolt circles, and wherein each joint has a plurality of bolts of a given bolt diameter lying on a given bolt circle along substantially equally angularly spaced, radial lines common to all of the joints, said seal comprising: an annular body having a central opening sized to extend around the inside diameter of the pipe, and an outer edge spaced radially inwardly from the smallest of the bolt circles; means on said body for forming a seal in each of the pipe joints around said opening when said body is clamped in the pipe joint; and at least three locating fingers secured to said body and projecting generally radially outwardly therefrom in angularly spaced relation along the radial lines, each of said fingers having a contoured edge facing toward the associated radial line for locating engagement with bolts of the different diameters on the bolt circles and the associated radial line; and each such edge including: an inner section positioned to abut against a bolt of a first predetermined diameter on the smallest bolt circle and on the associated radial line to prevent movement of the edge toward the abutting bolt, at least one intermediate section spaced radially outwardly from said inner section and laterally from the associated radial line and from said inner section to abut against a bolt of a second, larger diameter on an intermediate bolt circle, to prevent movement of the edge toward the abutting bolt, and an outer section spaced radially outwardly from said intermediate section and laterally from the associated radial line and from said intermediate section to abut against a bolt of a third, largest diameter on a third, largest bolt circle to prevent movement of the edge toward the abutting bolt; at least two of said edges facing angularly in opposite directions to block turning of said seal.
Claim 9
Dependent Claim
362 words
A seal for use in each of a standard series of at least three different pressure-rated, flanged pipe joints for a pipe of a given standard size, wherein the joints for different pressure ratings have at least three concentric bolt circles of different predetermined diameters and bolts of at least three different predetermined diameters on the bolt circles, and wherein each joint has a plurality of bolts of a given bolt diameter lying on a given bolt circle along substantially equally angularly spaced, radial lines common to all of the joints, said seal comprising: an annular body having a central opening sized to extend around the inside diameter of the pipe, and an outer edge spaced radially inwardly from the smallest of the bolt circles; means on said body for forming a seal in each of the pipe joints around said opening when said body is clamped in the pipe joint; and at least three locating fingers secured to said body and projecting generally radially outwardly therefrom in angularly spaced relation along the radial lines, each of said fingers having a contoured edge facing toward the associated radial line for locating engagement with bolts of the different diameters on the bolt circles and the associated radial line; and each such edge including: an inner section positioned to abut against a bolt of a first predetermined diameter on the smallest bolt circle and on the associated radial line to prevent movement of the edge toward the abutting bolt, at least one intermediate section spaced radially outwardly from said inner section and laterally from the associated radial line and from said inner section to abut against a bolt of a second, larger diameter on an intermediate bolt circle, to prevent movement of the edge toward the abutting bolt, and an outer section spaced radially outwardly from said intermediate section and laterally from the associated radial line and from said intermediate section to abut against a bolt of a third, largest diameter on a third, largest bolt circle to prevent movement of the edge toward the abutting bolt; at least two of said edges facing angularly in opposite directions to block turning of said seal.
Claim 10
Dependent Claim
203 words
A seal for use in each joint of a series of bolted pipe joints having a plurality of concentric bolt circles of different predetermined diameters and having bolts of predetermined diameters on the bolt circles appropriate to the corresponding pressure ratings, each joint of the series having bolts arranged on a plurality of angularly spaced, radial lines common to all of the joints, said seal comprising: a body having a central opening; means on said body for sealing each of the joints around said opening when the body is clamped in the joint; and at least three locating fingers secured to said body and projecting outwardly therefrom in angularly spaced relation, each of said fingers extending along one side of one of the radial lines and having a contoured edge facing toward the radial line and spaced a selected distance therefrom adjacent each bolt circle for locating engagEment with bolts of different diameters lying on the different bolt circles, said contoured edges being spaced laterally from the associated radial lines at least two different distances adjacent different bolt circles for engagement with bolts of different diameters on such different bolt circles, and at least two of said edges facing angularly in different directions.
Claim 11
Dependent Claim
203 words
A seal for use in each joint of a series of bolted pipe joints having a plurality of concentric bolt circles of different predetermined diameters and having bolts of predetermined diameters on the bolt circles appropriate to the corresponding pressure ratings, each joint of the series having bolts arranged on a plurality of angularly spaced, radial lines common to all of the joints, said seal comprising: a body having a central opening; means on said body for sealing each of the joints around said opening when the body is clamped in the joint; and at least three locating fingers secured to said body and projecting outwardly therefrom in angularly spaced relation, each of said fingers extending along one side of one of the radial lines and having a contoured edge facing toward the radial line and spaced a selected distance therefrom adjacent each bolt circle for locating engagEment with bolts of different diameters lying on the different bolt circles, said contoured edges being spaced laterally from the associated radial lines at least two different distances adjacent different bolt circles for engagement with bolts of different diameters on such different bolt circles, and at least two of said edges facing angularly in different directions.
Claim 12
Dependent Claim
150 words
A seal as defined in claim 8 in which said body has a circular inner edge larger than the inside diameter of the pipe joints in the series, and a circular outer edge smaller than the smallest of the bolt circles, and in which four locating fingers project outwardly along four radial lines constituting the opposite end portions of two perpendicular diameters of the joints, each such finger having a contoured edge including an inner arcuate section curved about a predetermined arc corresponding to a portion of the circumference of the bolt on the bolt circle of the smallest diameter, at least one intermediate section offset laterally from the radial line a greater distance than said inner section, and an outer section offset laterally from the radial line a greater distance than the intermediate section, at least one of said edges facing angularly in an opposite direction from the others.
Claim 13
Dependent Claim
26 words
A seal as defined in claim 9 in which at least one of said sections is straight and inclined outwardly and away from the radial line.
Claim 14
Dependent Claim
51 words
A seal as defined in claim 9 in which said intermediate section is straight and inclined outwardly and away from the radial line, and said outer section is a correspondingly inclined, straight continuation of said intermediate section, both such sections being tangent to the bolts on the different associated bolt circles.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |