US4569165A
Expired / Lapsed
US
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Structural connections
Assignee: University of Surrey
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Filing: 1983-12-20
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Granted: 1986-02-11
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Expires: 2003-12-20
Abstract
Abstract A structural connection between a tubular thermosetting plastics member and a thermoplastics end cap is described. An end of the tubular member is inserted into an annular, axially extending gap in the thermoplastics end cap. The inner and outer wall surfaces of the gap are threaded. Adhesive fills the space between the end of the tubular member and the threaded surfaces of the gap.
Inventors
- 👤 Stephen Baker
- 👤 Leonard C. Hollaway
- 👤 Christopher E. Terrell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:08
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/50; B29C66/51; B29C66/53; B29C66/534; B29C65/00; B29C65/48; B29C65/4805; B29C65/483; B29C66/01; B29C66/05; B29C66/10; B29C66/12; B29C66/124; B29C66/1244; B29C66/12441; B29C66/1246; B29C66/12469; B29C66/20; B29C66/24; B29C66/242; B29C66/2422; B29C66/24221; B29C66/70; B29C66/72; B29C66/721; B29C66/73; B29C66/739; B29C66/7392; B29C66/7394; E; E04; E04B; E04B1/00; E04B1/18; E04B1/19; E04B1/1903; B29C66/71; B29C66/7212; B29C66/7214; B29C66/72141; B29C66/731; B29C66/7316; B29C66/73161; E04B2001/1924; E04B2001/1927; E04B2001/1957; E04B2001/1966; E04B2001/1981; E04B2001/1984; Y; Y10; Y10T; Y10T403/00; Y10T403/34; Y10T403/341; Y10T403/342; Y10T403/347
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
132 words
A structural connection including two elements, made of a first polymer material and of a thermoplastics material or aluminium respectively, one element having wall portions which define a recess, the other element having an end portion having opposing surfaces, which end portion is accommodated in said recess so as to provide two pairs of cooperating surfaces defining a space therebetween, one surface of each said pair being a surface of said recess defining wall portion and the other said surface of each said pair being a said surface of said end portion, said thermoplastics or aluminium one of each said pair of co-operating surfaces defining grooves, and adhesive substantially filling said space between each said pair of co-operating surfaces which adhesive chemically bonds to the surface made of the first polymer material.
Claim 2
Dependent Claim
132 words
A structural connection including two elements, made of a first polymer material and of a thermoplastics material or aluminium respectively, one element having wall portions which define a recess, the other element having an end portion having opposing surfaces, which end portion is accommodated in said recess so as to provide two pairs of cooperating surfaces defining a space therebetween, one surface of each said pair being a surface of said recess defining wall portion and the other said surface of each said pair being a said surface of said end portion, said thermoplastics or aluminium one of each said pair of co-operating surfaces defining grooves, and adhesive substantially filling said space between each said pair of co-operating surfaces which adhesive chemically bonds to the surface made of the first polymer material.
Claim 3
Dependent Claim
11 words
A structural connection wherein the first polymer is a thermosetting polymer.
Claim 4
Dependent Claim
11 words
A structural connection wherein the first polymer is a thermosetting polymer.
Claim 5
Dependent Claim
31 words
A structural connection according to claim 1, wherein one of said elements is a tube and said recess is in the form of an axially-extending annular recess in the other element.
Claim 6
Dependent Claim
26 words
A structural connection according to claim 3, wherein at least one said grooved surface is threaded and is one of said wall surfaces defining said recess.
Claim 7
Dependent Claim
26 words
A structural connection according to claim 4, wherein the threads are helical and, where both surfaces are threaded, the threads are of substantially the same pitch.
Claim 8
Dependent Claim
17 words
A structural connection according to claim 4, wherein said tube is a fibre reinforced thermosetting polymer tube.
Claim 9
Dependent Claim
31 words
A structural connection according to claim 6, wherein said end portion of the tube is roughened to enable the adhesive to form a chemical bond with fibres in the material thereof.
Claim 10
Dependent Claim
16 words
A structural connection according to claim 1, wherein the thermoplastics element is a thermoplastics injection moulding.
Claim 11
Dependent Claim
43 words
A construction member for use in assembling a spaceframe comprising a hollow tubular member having two ends, and a pair of end caps secured to each said end of said tubular member by means of a structural connection as claimed in claim 1.
Claim 12
Dependent Claim
22 words
A construction member according to claim 9, wherein each of the end caps is provided with a plurality of laterally extending nibs.
Claim 13
Dependent Claim
50 words
A spaceframe constructed from a plurality of members according to claim 10, said members being connected at nodes of the spaceframe by means of co-operating top and bottom connecting plates which engage said nibs and clamp the end caps of the members in a desired position relative to one another.
Claim 14
Independent Claim
80 words
A method of forming a structural connection between an end of a cylindrical member and a closed-ended member having an internally threaded annular wall defining a recess having substantially the same diameter as the cylindrical member, including the steps of introducing adhesive into said recess and pushing said cylindrical member into the recess until it reaches the closed end, thereby forcing adhesive to run around the thread to substantially completely fill the space between the wall and the cylindrical member.
Claim 15
Independent Claim
80 words
A method of forming a structural connection between an end of a cylindrical member and a closed-ended member having an internally threaded annular wall defining a recess having substantially the same diameter as the cylindrical member, including the steps of introducing adhesive into said recess and pushing said cylindrical member into the recess until it reaches the closed end, thereby forcing adhesive to run around the thread to substantially completely fill the space between the wall and the cylindrical member.
References Cited (Backward Citations)
FR1175789A
Cited
CH392170A
Cited
US3146142A
Cited
GB1128601A
Cited
US4049480A
Cited
WO1979000176A1
Cited
GB2036846A
Cited
US4285609A
Cited
DE3010685A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-02-10 | 1989-08-12 | 1990-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-10 | 1993-08-12 | 1994-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-10 | 1997-08-12 | 1998-02-11 | $7700.00 | Window Closed / Lapsed |