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United States Patent [19] [11] Patent Number: 5,400,769
Tanii et al. [45] Date of Patent: Mar. 28, 1995
[54] ELECTRICALLY BENDABLE ENDOSCOPE APPARATUS HAVING CONTROLLED FIXED BENDING SPEED
[75] Inventors: Yoshiyuki Tanii; Hiroki Hibino, both of Hachioji, Japan
[73] Assignee: Olympus Optical Co., Ltd., Tokyo,
Japan
[21] Appl. No.: 989,945
[22] Filed: Dec. 10,1992
Related U.S. Application Data
[63] Continuation-in-part of Ser. No. 835,571, Feb. 14,1992, abandoned.
[30] Foreign Application Priority Data
Feb. 18, 1991 [JP] Japan 3-023468
Nov. 21, 1991 [JP] Japan 3-306410
[51] Int.C1.6 A61B1/04
[52] U.S. CI 128/4; 128/6
[58] Field of Search 128/4, 6, 7-10,
128/656-658, 772; 604/95, 280
[56] References Cited
U.S. PATENT DOCUMENTS
4,559,928 12/1985 Takayama 128/6
1 Claim, 15 Drawing Sheets 50 MOTOR CONTROLLING CIRCUIT
