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Space Systems Lab
University of Maryland Articles, Publications, and Presentations

3-D Sprags and Rollers

Articles
  • NASA/Goddard Space Flight Center's Technology CommercializationOffice Three-Dimensional Roller Locking SpragTechnology Opportunity
  • "Clutch Combined With Screw-Released Roller Brake," NASA Tech Briefs, December 1996.
  • "Roller Unlocking Sprags," NASA Tech Briefs, December 1996.
  • "Three-Dimensional Roller Locking Sprags," NASA Tech Briefs, February 1997.
  • "Sprag DesignAdds New Dimension," Design News, 3 March 1997.
  • Poland, J. and B. Roberts, "Development and Analysis of Three-Dimensional Roller LockingSprags," In NASA/Goddard Space Flight Center's Director's Discretionary Funding AnnualReport, January 1998.

Patents

  • Vranish, J. M., "Three-Dimensional Roller Locking Sprags," Date filed: 27 July 1994, Date ofPatent: 9 January 1996, Patent Number:5,482,144 or 5,482,144
    , Case Number:GSC-13617
  • Vranish, J. M., "Spin Bearings/Sprag Bearings, " Invention Disclosure Submitted: 25 August 1994,Case Number: GSC 13,679.
  • Vranish, J. M., "Roll-Unlocking Sprags," Invention Disclosure Submitted: 25 November 1994, CaseNumber: GSC 13,692.
  • Vranish, J. M., "Clutch Combined With Screw-Released Roller Brake," Case Number:GSC-13674.
  • Vranish, J. M., Wade, M. O., Poland, Jr., J. W., "Linear 3-D Roller Locking Sprags," InventionDisclosure Submitted: 9 September 1996, Case Number: GSC 13,885.
  • Vranish, J. M., "2-Way 3-D Roller Locking Sprags," Invention Disclosure Submitted: 5 December1996, Case Number: GSC 13,910.
  • Vranish, J. M., "1-Way Bearing," Invention Disclosure Submitted: 5 March 1997, Case Number:13,905.

Extravehicular Activity 3-D Roller Wrench

General EVA Wrench

Papers
  • Roberts, B., "Development of a 'Ratchetless' Wrench forExtravehicular Activity," 1999 AIAA Region I Mid-Atlantic Student Conference, 16-17 April1999 (also published as SSL Document Number 99-005).[ paper (371 K PDF) | presentation ]
  • Roberts, B. J. and D. L. Akin, "Weightless Testing of a'Ratchetless' Extravehicular ActivityWrench," SAE 1999-01-2036, 29th International Conference on Environmental Systems,12-15 July 1999 (also published as SSL Document Number 99-007).[ paper (566 K PDF) | presentation ]
  • Roberts, B., "Evaluation of a Three-Dimensonal Roller Clutch Reversible Hand Socket Wrenchfor Extravehicular Activity," Master of Science Thesis, Department of Aerospace Engineering,University of Maryland, 9 August 1999 (also published as SSL Document Number 99-012).[ paper (3.5 MB PDF) | presentation ]
Publicity

KC-135A Reduced-Gravity Flying Laboratory Tests

Neutral Buoyancy Laboratory Evaluations

  • Roberts, B., "Three-Dimensional Roller Wrench and Human Performance Neutral Buoyancy Laboratory98.2 Test Results," SSL Document Number 99-001, March 1999.[ paper (878 K PDF) | presentation ]

Space Experiment Module

Papers
  • Roberts, B., Shook, L., Hossaini, L., and R. Cohen, "Analysis of Three-DimensionalRoller Performance in a Micro-g Environment," in 1999 Shuttle Small Payloads Project SymposiumProceedings, NASA-CP-1999-209476, 13-15 September 1999 (also published as SSL Document Number 99-010).[ paper (1.1 MB PDF) | presentation ]
Publicity

EVA Wrench Home 3-D Sprags and Rollers Commercial 3-D Roller Wrench EVA 3-D Roller Wrench
Publications Awards Personnel Applications
Sprag Resources Contacts

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