Patent US3220152A successfully refreshed from Google Patents.
US3220152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Truss structure
Assignee: Union Tank Car Co
•
Filing: 1961-09-18
•
Granted: 1965-11-30
•
Expires: 1981-09-18
Abstract
No abstract record available.
Inventors
- 👤 Rolland G Sturm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:52
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/18; E04B1/19; E04B1/1903; E04B1/1906; E04B2001/1924; E04B2001/1927; E04B2001/1957; E04B2001/1972; E04B2001/1981; E04B2001/1987; E04B2001/1993; Y; Y10; Y10S; Y10S52/00; Y10S52/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
204 words
A TRUSS STRUCTURE COMPRISING A PLURALITY OF TETRAHEDRAL FRAME UNITS, EACH OF SUCH TETRAHEDRAL FRAME UNITS INCLUDING THREE BASE MEMBERS, THREE LOWER JOINT MEMBERS RIGIDLY CONNECTING SAID BASE MEMBERS, EACH OF SAID LOWER JOINT MEMBERS BEING SUBSTANTIALLY IDENTICAL IN CONFIGURATION AND DEFINING ONE-THIRD OF A STABLE GEOMETRIC JOINT STRUCTURE, A WEB MEMBER RIGIDLY CONNECTED TO EACH LOWER JOINT MEMBER, SAID WEB MEMBERS CONVERGING TO AN APEX, AN UPPER JOINT MEMBER RIGIDLY CONNECTING SAID WEB MEMBERS AT THE APEX, THREE OF SAID LOWER JOINT MEMBERS BEING RIGIDLY INTERCONNECTED IN COMPLEMENTARY INTERLOCKING RELATIONSHIP TO FORM A LOWER JOINT BETWEEN THREE OF SAID TETRAHEDRAL FRAME UNITS ION THE FORM OF STABLE GEOMETRIC JOINT STRUCTURE WITHOUT COLLATERAL JOINT MEMBERS, A PLURALITY OF TRIANGULAR FRAME UNITS, EACH OF SAID TRIANGULAR FRAME UNITS COMPRISING THREE SIDE MEMBERS, THREE TOP JOINT MEMBERS RIGIDLY INTERCONNECTING SAID SIDE MEMBERS, EACH OF SAID TOP JOINT MEMBERS BEING RIGIDLY INTERCONNECTED WITH TWO OTHER TOP JOINT MEMBERS IN ADJOINING TRIANGULAR FRAME UNITS AND TO AN UPPER JOINT MEMBER ON ONE OF SAID TETRAHEDRAL FRAME UNITS IN COMPLEMENTARY INTERLOCKING RELATIONSHIP TO FORM AN UPPER JOINT BETWEEN CORRESPONDING TRIANGULAR FRAME UNITS AND TETRAHEDRAL FRAME UNITS, SAID UPPER JOINT COMPRISING A STABLE GEOMETRIC JOINT STRUCTURE WITHOUT COLLATERAL JOINT MEMBERS.
Claim 2
Dependent Claim
204 words
A TRUSS STRUCTURE COMPRISING A PLURALITY OF TETRAHEDRAL FRAME UNITS, EACH OF SUCH TETRAHEDRAL FRAME UNITS INCLUDING THREE BASE MEMBERS, THREE LOWER JOINT MEMBERS RIGIDLY CONNECTING SAID BASE MEMBERS, EACH OF SAID LOWER JOINT MEMBERS BEING SUBSTANTIALLY IDENTICAL IN CONFIGURATION AND DEFINING ONE-THIRD OF A STABLE GEOMETRIC JOINT STRUCTURE, A WEB MEMBER RIGIDLY CONNECTED TO EACH LOWER JOINT MEMBER, SAID WEB MEMBERS CONVERGING TO AN APEX, AN UPPER JOINT MEMBER RIGIDLY CONNECTING SAID WEB MEMBERS AT THE APEX, THREE OF SAID LOWER JOINT MEMBERS BEING RIGIDLY INTERCONNECTED IN COMPLEMENTARY INTERLOCKING RELATIONSHIP TO FORM A LOWER JOINT BETWEEN THREE OF SAID TETRAHEDRAL FRAME UNITS ION THE FORM OF STABLE GEOMETRIC JOINT STRUCTURE WITHOUT COLLATERAL JOINT MEMBERS, A PLURALITY OF TRIANGULAR FRAME UNITS, EACH OF SAID TRIANGULAR FRAME UNITS COMPRISING THREE SIDE MEMBERS, THREE TOP JOINT MEMBERS RIGIDLY INTERCONNECTING SAID SIDE MEMBERS, EACH OF SAID TOP JOINT MEMBERS BEING RIGIDLY INTERCONNECTED WITH TWO OTHER TOP JOINT MEMBERS IN ADJOINING TRIANGULAR FRAME UNITS AND TO AN UPPER JOINT MEMBER ON ONE OF SAID TETRAHEDRAL FRAME UNITS IN COMPLEMENTARY INTERLOCKING RELATIONSHIP TO FORM AN UPPER JOINT BETWEEN CORRESPONDING TRIANGULAR FRAME UNITS AND TETRAHEDRAL FRAME UNITS, SAID UPPER JOINT COMPRISING A STABLE GEOMETRIC JOINT STRUCTURE WITHOUT COLLATERAL JOINT MEMBERS.
References Cited (Backward Citations)
US1783281A
Cited
US2709975A
Cited
US2682235A
Cited
US2931467A
Cited
US2964147A
Cited
US2929473A
Cited
US2986241A
Cited
US2967379A
Cited
US3006670A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |