US3782674A
Expired / Lapsed
US
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Kinematic extensible truss mechanism
Assignee: International Business Machines Corp
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Filing: 1972-10-17
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Granted: 1974-01-01
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Expires: 1992-10-17
Abstract
Abstract A kinematic extensible truss mechanism comprising a first set of truss members arranged in a parallelogram with pivots at each of the junctures of the truss members, and a second set of truss members arranged in a parallelogram with pivots at each of the junctures of the second set of truss members. Two of the pivots of the first set coincide with two of the pivots of the second set, and at least one rigid extension projects from one of the truss members of the second set substantially at right angles thereton. An arm is pivotally connected to the rigid extension and connected for rotation to a pivot of the first set of truss members which is not common to the first and second set of truss members. In this manner movement of one of the truss members of one of the sets relative to another member of the other of the sets maintains parallelism of the one truss member to the other when relative motion occurs in a first direction, and results in an elevation of the one relative to the other when relative motion occurs in the opposite direction.
Inventors
- 👤 R Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:45
CPC Classifications
H; H05; H05K; H05K7/00; H05K7/14; A; A47; A47B; A47B88/00; A47B88/90; H05K7/16
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
162 words
A kinematic extensible truss mechanism, comprising in combination: a fixed support and a movable support; at least a first pair of upstanding truss members joined adjacent one end of each by pivot means; pivot means joining one of said truss members adjacent its opposite end to said fixed support, and separate pivot means joining the other of said truss members adjacent its opposite end to said movable support; a second pair of truss members axially spaced from said first pair of truss members and including pivot means joining said one truss member to said second truss member, the opposite ends of said truss members being respectively connected to said fixed and movable support by separate pivot means; a rigid extension projecting perpendicularly from one of said truss members connected to one of said supports, and an arm extending from said extension to the other of said supports and pivotally connected adjacent its opposite ends to both said extension and said other support.
Claim 2
Dependent Claim
162 words
A kinematic extensible truss mechanism, comprising in combination: a fixed support and a movable support; at least a first pair of upstanding truss members joined adjacent one end of each by pivot means; pivot means joining one of said truss members adjacent its opposite end to said fixed support, and separate pivot means joining the other of said truss members adjacent its opposite end to said movable support; a second pair of truss members axially spaced from said first pair of truss members and including pivot means joining said one truss member to said second truss member, the opposite ends of said truss members being respectively connected to said fixed and movable support by separate pivot means; a rigid extension projecting perpendicularly from one of said truss members connected to one of said supports, and an arm extending from said extension to the other of said supports and pivotally connected adjacent its opposite ends to both said extension and said other support.
Claim 3
Dependent Claim
26 words
Apparatus in accordance with claim 1 including means to maintain axial stability of said pairs and their positions, one pair with respect to the other pair.
Claim 4
Dependent Claim
24 words
Apparatus in accordance with claim 2 including a truss member connected intermediate said pivots joining each pair of truss members, one to the other.
Claim 5
Dependent Claim
30 words
Apparatus in accordance with claim 1 wherein the length of said rigid extension is approximately one-half the distance between the pivots joining the first and second pair of truss members.
Claim 6
Dependent Claim
125 words
A kinematic extensible truss mechanism comprising a pair of sets of truss members each set of truss members arranged in a parallelogram and pivot means pivotally connecting adjacent truss members of a set, each set of parallelograms having truss members equal in length to like truss members of the other set; a truss member common to each of said sets and pivotally connected adjacent its ends to truss members of each set; an extension of one truss member of said second set of truss members projecting at substantially right angles with respect thereto, and an arm pivotally connected to said extension and the diagonally opposite pivot means of said first set of truss members with respect to the pivot means of said one truss member.
Claim 7
Dependent Claim
125 words
A kinematic extensible truss mechanism comprising a pair of sets of truss members each set of truss members arranged in a parallelogram and pivot means pivotally connecting adjacent truss members of a set, each set of parallelograms having truss members equal in length to like truss members of the other set; a truss member common to each of said sets and pivotally connected adjacent its ends to truss members of each set; an extension of one truss member of said second set of truss members projecting at substantially right angles with respect thereto, and an arm pivotally connected to said extension and the diagonally opposite pivot means of said first set of truss members with respect to the pivot means of said one truss member.
Claim 8
Dependent Claim
27 words
Apparatus in accordance with claim 4 wherein said rigid extension has a length between pivots approximately one-half the distance between the pivots of said common truss member.
Claim 9
Dependent Claim
161 words
A kinematic extensible truss mechanism, comprising in combination: a first set of truss members arranged in a parallelogram, and pivot means at each of the junctures of said truss members; a second set of truss members arranged in a parallelogram, and pivot means at each of the junctures of said truss members; at least two of said pivot means of said first set corresponding to two of said pivot means of said second set; at least one rigid extension from one of said truss members of said second set and an arm pivotally connected to said rigid extension and connected for rotation to a pivot of said first set of truss members which is not common to said first and second set of truss members, whereby movement of said truss members of one of said sets relative to another member of the other of said sets Maintains parallelism of said one truss member to the other when relative motion occurs therebetween.
Claim 10
Dependent Claim
161 words
A kinematic extensible truss mechanism, comprising in combination: a first set of truss members arranged in a parallelogram, and pivot means at each of the junctures of said truss members; a second set of truss members arranged in a parallelogram, and pivot means at each of the junctures of said truss members; at least two of said pivot means of said first set corresponding to two of said pivot means of said second set; at least one rigid extension from one of said truss members of said second set and an arm pivotally connected to said rigid extension and connected for rotation to a pivot of said first set of truss members which is not common to said first and second set of truss members, whereby movement of said truss members of one of said sets relative to another member of the other of said sets Maintains parallelism of said one truss member to the other when relative motion occurs therebetween.
Claim 11
Dependent Claim
41 words
Apparatus in accordance with claim 7 wherein when one of said truss members of said second set moves in one direction the height of said one truss member remains constant with respect to the parallel truss member of said first set.
Claim 12
Dependent Claim
31 words
Apparatus in accordance with claim 8 wherein when relative motion occurs in the opposite direction, said one truss member elevates with respect to the parallel truss member of said first set.
Claim 13
Dependent Claim
27 words
Apparatus in accordance with claim 7 wherein said rigid extension is disposed substantially at right angles to said one of said truss members of said second set.
Claim 14
Dependent Claim
31 words
Apparatus in accordance with claim 10 wherein said rigid extension has a length between pivots approximately one-half the distance between the pivot means common to both said first and second set.
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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) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |