Patent US3835615A successfully refreshed from Google Patents.
US3835615A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fastener joint construction
Assignee: Huck Manufacturing Co
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Filing: 1972-07-03
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Granted: 1974-09-17
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Expires: 1992-07-03
Abstract
Abstract A joint assembly including work pieces with aligned holes of a prescribed diameter therethrough, a fastener in the holes and having a shank portion a prescribed amount less in diameter than the holes, and a metal sleeve member positioned between the shank portion of the fastener and the work pieces within the holes and in bearing contact with both the shank portion and the work pieces. The sleeve member includes a tubular side wall encircling the shank and substantially filling the space between the shank and the work pieces. The thickness of the tubular wall is nominally 0.008 or 0.016 inch. The metal sleeve member should preferably be made of a material similar in strength to that of the work pieces. For the high strength requirements of the aerospace industry the metal sleeve member should have a Brinell Hardness Number of at least 60 and/or a yield strength in excess of 20,000 p.s.i. The sleeve member may also be provided with a outwardly extending head flange at one end thereof and the tubular wall may be circumferentially grooved at longitudinally spaced intervals to allow the length of the wall to be adjusted by removal of excess material and to provide sealant reservoirs along the length of the tubular wall adjacent the work pieces about the aligned holes. The distal end of the tubular side wall may be tapered inwardly to provide a self-centering capability as the sleeve member is inserted into the holes, especially in interference.
Inventors
- 👤 J King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:26
CPC Classifications
B; B23; B23P; B23P9/00; B23P9/02; B23P9/025; F; F16; F16B; F16B19/00; F16B19/02; F16B19/04; F16B19/08; F16B19/10; F16B19/1027; F16B19/1036; F16B19/1045; F16B19/1063; F16B37/00; F16B37/12; F16B37/122; F16B4/00; F16B4/004; F16B5/00; F16B5/02; F16B2200/00; F16B2200/63; Y; Y10; Y10S; Y10S248/00; Y10S248/909; Y10S411/00; Y10S411/955; Y10S411/965; Y10S411/969; Y10T; Y10T403/00; Y10T403/75
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
144 words
A joint assembly including: a plurality of work pieces having aligned holes therethrough of a first prescribed diameter; a fastener through said holes having a shank portion defininG a bearing area within said holes of a second prescribed diameter smaller than said first prescribed diameter; and, a sleeve member within said holes between said shank portion of said fastener and said work pieces, said sleeve member including a continuous tubular side wall in bearing contact with both said shank portion of said fastener and said work pieces within said holes, said side wall substantially filling the space between said fastener and said work pieces within said holes and having a prescribed thickness less than the threshold thickness of the material of said sleeve member below which insignificant material flow within said side wall occurs under load to maintain the strength of said joint assembly.
Claim 2
Dependent Claim
144 words
A joint assembly including: a plurality of work pieces having aligned holes therethrough of a first prescribed diameter; a fastener through said holes having a shank portion defininG a bearing area within said holes of a second prescribed diameter smaller than said first prescribed diameter; and, a sleeve member within said holes between said shank portion of said fastener and said work pieces, said sleeve member including a continuous tubular side wall in bearing contact with both said shank portion of said fastener and said work pieces within said holes, said side wall substantially filling the space between said fastener and said work pieces within said holes and having a prescribed thickness less than the threshold thickness of the material of said sleeve member below which insignificant material flow within said side wall occurs under load to maintain the strength of said joint assembly.
Claim 3
Dependent Claim
51 words
The joint assembly of claim 1 wherein said prescribed thickness of said side wall is no greater than 0.008 inch along its length and wherein said side wall is made out of a material having a Brinell Hardness Number of at least 60 and a yield in excess of 20,000 p.s.i.
Claim 4
Dependent Claim
50 words
The joint assembly of claim 1 wherein said prescribed thickness of said side wall is nominally 0.008 inch along its length and wherein said side wall is made out of a material having a Brinell Hardness Number of at least 60 and a yield strength in excess of 20,000 p.s.i.
Claim 5
Dependent Claim
48 words
A joint assembly as set forth in claim 3 wherein said tubular wall defines a plurality of external circumferential weakened portions therein lying in a plane substantially perpendicular to the centerline of said tubular wall and spaced a prescribed distance apart along the length of said tubular wall.
Claim 6
Dependent Claim
31 words
A joint assembly as set forth in claim 4 wherein said weakened portions are inwardly extending generally V-shaped grooves, the innermost ends of said grooves having a substantially sharp pointed edge.
Claim 7
Dependent Claim
25 words
A joint assembly as set forth in claim 5 wherein said grooves have a depth equal to approximately one-half the thickness of said tubular wall.
Claim 8
Dependent Claim
13 words
The joint assembly of claim 5 further including a sealant filling said grooves.
Claim 9
Dependent Claim
49 words
The joint assembly of claim 3 wherein said fastener includes a head at one end of said shank portion and wherein said sleeve member further includes an annular head integral with one end of said tubular wall and lying between said head of said fastener and said work pieces.
Claim 10
Dependent Claim
40 words
The joint assembly of claim 8 wherein said fastener is of the blind expansion type and wherein said sleeve member further includes an end wall integral with and closing that end of said tubular wall opposite said annular head flange.
Claim 11
Dependent Claim
12 words
The joint assembly of claim 3 wherein said material is stainless steel.
Claim 12
Dependent Claim
99 words
A joint assembly as set forth in claim 8 wherein said tubular wall, prior to formation of said joint, includes a first section adjacent said head flange having a substantially constant diameter along its length, and a second section integral with said first section opposite said head flange tapering inwardly a prescribed amount for centering said sleeve member during insertion into said holes through said work pieces, said second section having been expanded by said shank portion of said fastener to the same constant diameter as said first section as said shank portion was inserted into said sleeve member.
Claim 13
Dependent Claim
15 words
A joint assembly as set forth in claim 11 wherein said material is stainless steel.
Claim 14
Dependent Claim
19 words
The joint assembly of claim 12 wherein said prescribed amount of taper for said second section is 0.002-0.004 inch.
Claim 15
Dependent Claim
192 words
A joint assembly including a plurality of work pieces with aligned holes therethrough of a prescribed diameter, a standard size fastener in said holes and having a shank portion a prescribed amount less in diamater than said holes, and a plurality of sleeve members positioned between said shank portion of said fastener and said work pieces within said aligned holes and nesting within each other, the innermost of said sleeve members in bearing contact with both said shank portion and the next outermost of said sleeve members, said outermost of said plurality of sleeve members in bearing contact with both said work pieces within said aligned holes and said next innermost of said sleeve members, each of said plurality of sleeve members including a tubular side wall, said tubular side walls nesting within each other to substantially fill the space between said work pieces and said fastener within said holes, each of said tubular side walls having a prescribed thickness less than the threshold thickness of the material of said sleeve member below which insignificant material flow within said side wall occurs under load to maintain the strength of said joint assembly.
Claim 16
Dependent Claim
192 words
A joint assembly including a plurality of work pieces with aligned holes therethrough of a prescribed diameter, a standard size fastener in said holes and having a shank portion a prescribed amount less in diamater than said holes, and a plurality of sleeve members positioned between said shank portion of said fastener and said work pieces within said aligned holes and nesting within each other, the innermost of said sleeve members in bearing contact with both said shank portion and the next outermost of said sleeve members, said outermost of said plurality of sleeve members in bearing contact with both said work pieces within said aligned holes and said next innermost of said sleeve members, each of said plurality of sleeve members including a tubular side wall, said tubular side walls nesting within each other to substantially fill the space between said work pieces and said fastener within said holes, each of said tubular side walls having a prescribed thickness less than the threshold thickness of the material of said sleeve member below which insignificant material flow within said side wall occurs under load to maintain the strength of said joint assembly.
Claim 17
Dependent Claim
50 words
The joint assembly of claim 14 wherein said prescribed thickness of each of said side walls is nominally 0.008 inch and wherein each of said side walls is made of a material having a Brinell Hardness Number of at least 60 and a yield strength in excess of 20,000 p.s.i.
Claim 18
Dependent Claim
83 words
The joint assembly of claim 14 wherein said fastener includes a head; wherein said innermost sleeve member further includes an annular head flange integral with one end of said side wall of said innermost sleeve member and underlying said head of said fastener; and wherein each of said sleeve members other than said innermost sleeve member do not have a head flange and said side wall of each of said other sleeve members terminates under said head flange of said innermost sleeve member.
Claim 19
Dependent Claim
12 words
The joint assemby of claim 16 wherein there are two sleeve members.
Claim 20
Dependent Claim
187 words
A joint assembly including: a plurality of work pieces having aligned holes therethrough of a first prescribed diameter; a fastener through said holes having a shank portion defining a bearing area within said holes of a second prescribed diameter smaller than said first prescribed diameter and having a head at one end of said shank portion; and, a stainless steel sleeve member within said holes between said shank portion of said fastener and said work pieces, said sleeve member including a continuous tubular side wall in bearing contact with both said shank portion of said fastener and said work pieces within said holes, and an annular head flange integral with one end of said side wall and underlying said head of said fastener, said side wall substantially filling the space between said fastener and said work pieces within said holes and having a nominal thickness of 0.008 inch along its length, said nominal thickness being less than the threshold thickness of the material of said sleeve member below which insignificant material flow within said side wall occurs under load to maintain the strength of said joint assembly.
Claim 21
Dependent Claim
187 words
A joint assembly including: a plurality of work pieces having aligned holes therethrough of a first prescribed diameter; a fastener through said holes having a shank portion defining a bearing area within said holes of a second prescribed diameter smaller than said first prescribed diameter and having a head at one end of said shank portion; and, a stainless steel sleeve member within said holes between said shank portion of said fastener and said work pieces, said sleeve member including a continuous tubular side wall in bearing contact with both said shank portion of said fastener and said work pieces within said holes, and an annular head flange integral with one end of said side wall and underlying said head of said fastener, said side wall substantially filling the space between said fastener and said work pieces within said holes and having a nominal thickness of 0.008 inch along its length, said nominal thickness being less than the threshold thickness of the material of said sleeve member below which insignificant material flow within said side wall occurs under load to maintain the strength of said joint assembly.
Claim 22
Dependent Claim
48 words
A joint assembly as set forth in claim 1 wherein said tubular wall defines a plurality of external circumferential weakened portions therein lying in a plane substantially perpendicular to the centerline of said tubular wall and spaced a prescribed distance apart along the length of said tubular wall.
Claim 23
Dependent Claim
30 words
Ajoint assembly as set forth in claim 19 wherein said weakened portions are inwardly extending genrally V-shaped grooves, the innermost ends of said grooves having a substantially sharp pointed edge.
Claim 24
Dependent Claim
25 words
A joint assembly as set forth in claim 20 wherein said grooves have a depth equal to approximately one-half the thickness of said tubular wall.
Claim 25
Dependent Claim
50 words
The joint assembly of claim 1 wherein said fastener includes a head at one end of said shank portion and wherein said sleeve member further includes an annular head flange integral with one end of said tubular wall and lying between said head of said fastener and said work pieces.
Claim 26
Dependent Claim
12 words
The joint assembly of claim 22 wherein said material is stainless steel.
Claim 27
Dependent Claim
12 words
The joint assembly of claim 1 wherein said material is stainless steel.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |