US4879499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Industrial robot's articulate device
Assignee: Mitsubishi Electric Corp
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Filing: 1988-09-01
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Granted: 1989-11-07
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Expires: 2008-09-01
Abstract
Abstract An industrial robot's articulate device comprises: a first arm; a second arm rotatably connected to the first arm; an electric motor for rotating the second arm; a transmission shaft rotatably supported by the first arm for transmitting the output of the electric motor to the second arm; and a detecting mechanism for detecting the position of the second arm with respect to the first arm. The detecting mechanism includes a dog secured to the transmission shaft, a swing lever swingably coupled to the first arm to pose in alternative postures according to the direction of rotation of the dog and a detector for detecting the alternative postures of the swing lever. The detector is constituted by a pair of limit switches, which are provided on both sides of the swing lever to detect the alternative postures thereof.
Inventors
- 👤 Masanari Iwata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:45
CPC Classifications
B; B25; B25J; B25J18/00; B25J17/00; B25J17/02; B25J17/0241; B25J19/00; B25J9/00; B25J9/10; B25J9/1005; B25J9/101
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
131 words
An industrial robot's articulate device, comprising: first means constituted by one of a first arm and a base; second means constituted by a second arm, which is rotatably connected to said first means; an electric motor provided on said first means for rotating said second means; a transmission shaft rotatably supported by said first means for transmitting the output of said electric motor to said second means; and a detecting mechanism for detecting the position of said second means with respect to said first means, said detecting mechanism including a dog secured to said transmission shaft, a swing lever swingably coupled to said first means to pose in alternative postures according to the directions of rotation of said dog, and detecting means for detecting the alternative postures of said swing lever.
Claim 2
Dependent Claim
131 words
An industrial robot's articulate device, comprising: first means constituted by one of a first arm and a base; second means constituted by a second arm, which is rotatably connected to said first means; an electric motor provided on said first means for rotating said second means; a transmission shaft rotatably supported by said first means for transmitting the output of said electric motor to said second means; and a detecting mechanism for detecting the position of said second means with respect to said first means, said detecting mechanism including a dog secured to said transmission shaft, a swing lever swingably coupled to said first means to pose in alternative postures according to the directions of rotation of said dog, and detecting means for detecting the alternative postures of said swing lever.
Claim 3
Dependent Claim
42 words
A device as claimed in claim 1, in which said detecting mechanism further comprises a spring which is connected between said swing lever and said first means for restore said swing lever when said transmission shaft has returned to an original position.
Claim 4
Dependent Claim
30 words
A device as claimed in claim 1, in which said detecting means is constituted by a pair of limit switches which are arranged on both sides of said swing lever.
Claim 5
Dependent Claim
44 words
A device as claimed in claim 3, in which when said transmission shaft is turned more than 90° from a reference position, said dog strikes against said swing lever so that said swing lever causes one of said pair of switch to turn on.
Claim 6
Dependent Claim
31 words
A device as claimed in claim 1, further comprising a speed reducing means for lowering the output speed of said electric motor to transmit the output thereof to said transmission shaft.
Claim 7
Dependent Claim
16 words
A device as claimed in claim 1, in which said detecting means is constituted by photo-sensors.
Claim 8
Dependent Claim
17 words
A device as claimed in claim 1, in which said detecting means is constituted by magnetic sensors.
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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) | 1992-11-06 | 1993-05-08 | 1993-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-06 | 1997-05-08 | 1997-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-06 | 2001-05-08 | 2001-11-07 | $7700.00 | Window Closed / Lapsed |