CA2016428A1 - Radial expansion/retraction truss structures - Google Patents

Radial expansion/retraction truss structures

Info

Publication number
CA2016428A1
CA2016428A1 CA 2016428 CA2016428A CA2016428A1 CA 2016428 A1 CA2016428 A1 CA 2016428A1 CA 2016428 CA2016428 CA 2016428 CA 2016428 A CA2016428 A CA 2016428A CA 2016428 A1 CA2016428 A1 CA 2016428A1
Authority
CA
Canada
Prior art keywords
pivot points
pair
scissors
assembly
terminal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA 2016428
Other languages
French (fr)
Other versions
CA2016428C (en
Inventor
Charles Hoberman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US07/505,804 external-priority patent/US5024031A/en
Application filed by Individual filed Critical Individual
Publication of CA2016428A1 publication Critical patent/CA2016428A1/en
Application granted granted Critical
Publication of CA2016428C publication Critical patent/CA2016428C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Bridges Or Land Bridges (AREA)
  • Tents Or Canopies (AREA)

Abstract

A loop-assembly is disclosed which is comprised of at least three scissors-pairs, at least two of the pairs comprising:
two essentially identical rigid angulated strut elements, each having a central and two terminal pivot points which do not lie in a straight line, each strut being pivotally joined to the other of its pair by their central pivot points.
each pair being pivotally joined by two terminal pivot points to two terminal pivot points of another pair such that both scissors-pairs lie essentially in the same plane, or each pair being pivotally joined by two terminal pivot points to two terminal pivot points of another pair in that the terminal points of a scissors-pair are each pivotally joined to a hub element, and these hub elements are in turn joined to the terminal pivot points of another scissors-pair, whereby a closed loop-assembly is thus formed of scissors-pairs, and this loop-assembly can fold and unfold, and a line that intersects and is perpendicular to the axes of any two terminal pivot points is non-parallel with at least two other similarly formed lines in the assembly, the angles formed between said lines remaining constant as the loop-assembly is folded and unfolded.
CA 2016428 1990-04-06 1990-05-09 Radial expansion/retraction truss structures Expired - Fee Related CA2016428C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US505,804 1990-04-06
US07/505,804 US5024031A (en) 1988-10-27 1990-04-06 Radial expansion/retraction truss structures

Publications (2)

Publication Number Publication Date
CA2016428A1 true CA2016428A1 (en) 1991-10-06
CA2016428C CA2016428C (en) 1999-08-31

Family

ID=24011915

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2016428 Expired - Fee Related CA2016428C (en) 1990-04-06 1990-05-09 Radial expansion/retraction truss structures

Country Status (1)

Country Link
CA (1) CA2016428C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106337523A (en) * 2016-09-09 2017-01-18 东南大学 Expandable column surface reticulated shell with foldable rigid roof plate

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106337523A (en) * 2016-09-09 2017-01-18 东南大学 Expandable column surface reticulated shell with foldable rigid roof plate
CN106337523B (en) * 2016-09-09 2018-07-24 东南大学 It is a kind of that there is the deployable cylindrical reticulated shell structure for folding rigid roofing plate

Also Published As

Publication number Publication date
CA2016428C (en) 1999-08-31

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