The man accused of raping a Silver Spring woman and throwing her off a bridge into the Patuxent River Jan. 6 lost his bid yesterday to have the court set a bond in his case.

Montgomery County District Judge Louis D. Harrington refused the motion for bond filed by public defenders Carol Freeman and Eugene Wolfe on behalf of Richard Dale Baumgardner, 25, who has been held without bond since Jan. 17, when he was charged with kidnaping, rape, attempted murder and auto theft. The 30-year-old victim, who was abducted from Wheaton Plaza, swam to safety after being thrown from the Rocky Gorge Bridge on Rte. 29.

In asking for bond, Freeman said Baumgardner had been living in Clarksville with his parents, James and Lavon Baumgardner, who are employed at the National Security Agency and the Chespeake & Potomac Telephone Co.

Freeman said that Baumgardner's brother, Wayne Baumgardner of Bethesda, also was prepared to offer Richard a home, as well as employment as a baby sitter for his three children.

Richard Baumgardner, the subject of an intense search, was arrested after being lured by his brother into a trap arranged by police. He was offered a trip to the bus station, but was driven to a police station instead.

Deputy State's Attorney Matthew Campbell argued against bond on grounds that the defendant is accused of "very violent offenses" and that there is a risk of flight.