A one way braking device has a first sealed chamber filled with a viscous fluid, a braking rotor being rotably supported within the chamber, a housing or the braking rotor, respectively, coacting with a pinion which in turn cooperates with a tooth rod or a gear or the like. The first housing is flo
A one way braking device has a first sealed chamber filled with a viscous fluid, a braking rotor being rotably supported within the chamber, a housing or the braking rotor, respectively, coacting with a pinion which in turn cooperates with a tooth rod or a gear or the like. The first housing is floatingly supported in a second chamber of a second housing. The circumference of the first housing and a locking portion of the wall of the second chamber are formed such that a positive interengagement between the first and second housings takes place if by a linear first force component the first housing and the locking portion are moved against each other. A free running between the first and second housings is effected when a second force component opposite to the first component effects between the first and second housings.
대표청구항▼
The invention claimed is: 1. A one way braking device, comprising: a first housing having a first sealed chamber filled with a viscous fluid and a first locking portion on a circumference of said first housing; a braking rotor being rotatably supported within the first chamber; a pinion attached to
The invention claimed is: 1. A one way braking device, comprising: a first housing having a first sealed chamber filled with a viscous fluid and a first locking portion on a circumference of said first housing; a braking rotor being rotatably supported within the first chamber; a pinion attached to said braking rotor and adapted to mesh with a gear; and a second housing having a second chamber which has a second locking portion on a wall thereof; wherein the first housing is floating in the second chamber; the first and second locking portions are engaged when the first housing is moved relative to the second housing in a first direction, wherein, when said first and second locking portions are engaged, rotational movement of said first housing about the rotational axis of the braking rotor and relative to said second housing is limited in both clockwise and counterclockwise directions; and the first and second locking portions are disengaged to allow a free running between the first and second housings when the first housing is moved relative to the second housing in a second direction opposite to the first direction, wherein, when said first and second locking portions are disengaged, said first housing is rotatable about the rotational axis of the braking rotor and relative to said second housing in both said clockwise and counterclockwise directions. 2. The braking device, of claim 1, wherein the first and second locking portions include matching toothed segments. 3. The braking device of claim 1, wherein the second locking portion has two spaced apart locking edges which cooperate with the first locking portion which includes spaced apart projections on said circumference of the first housing. 4. The braking device of claim 1, wherein the first locking portion on the circumference of the first housing is a polygon in cross section and the second locking portion is shaped as a complementary polygonal portion. 5. The braking device of claim 1, wherein the second chamber of the second housing is defined within an annular portion, and an open side of the annular portion is covered by a cap which overgrips the annular portion. 6. The braking device of claim 5, wherein the cap forms a snapping connection with the annular portion. 7. The braking device of claim 1, wherein the whole said device is molded of plastic material. 8. The device of claim 1, wherein the second locking portion includes first and second stop elements which, when the first and second locking portions are engaged, define limits for rotational movements of said first housing clockwise and counterclockwise, respectively. 9. The device of claim 1, wherein, when the first and second locking portions are disengaged, the first housing is free to rotate about the rotational axis, both clockwise and counterclockwise, for full 360째. 10. The device of claim 1, wherein said first housing is moveable in a straight line relative to said second housing between a braking position where the first and second locking portions are engaged and a free running position where the first and second locking portions are disengaged. 11. A one way braking device, comprising: a first housing defining a first chamber containing a viscous liquid, said first housing having a first locking portion; a braking rotor rotatably received in said first chamber; a second housing defining a second chamber, said second chamber having a second locking portion engageable with the first locking portion, said first housing being retained in the second housing so as to be moveable relative to said second housing in at least two different straight axes located in a plane perpendicular to a rotational shaft of said braking rotor; wherein said first housing is moveable within said second housing between a braking position and a free running position; in said braking position, said first and second locking portions are engaged, whereby rotational movement of said rotor will be braked by the viscous liquid; and in said free running position, said first and second locking portions are disengaged, whereby rotational movement of said rotor will cause a free running between the first and second housings. 12. The braking device of claim 11, wherein an outer wall of the first housing has, in cross section, a convex polygonal portion as said first locking portion; and an inner wall of said second chamber consists of, in cross section, (1) a single complementary convex polygonal portion as said second locking portion and (2) a circular portion. 13. The braking device of claim 12, wherein an entirety of the outer wall of the first housing is, in cross section, a single convex polygon. 14. The braking device of claim 11, wherein an entirety of an outer wall of the first housing is, in cross section, a single convex polygon; and the second chamber has an inner wall which is, in cross section, at least partially polygonal and complementary to the convex polygon of said first housing. 15. The device of claim 11, further comprising a pinion attached to the rotational shaft of said braking rotor for transmitting an external rotational force to said braking rotor. 16. The device of claim 15, further comprising a toothed rod meshing with said pinion. 17. The braking device of claim 11, wherein the second locking portion is a recess on an inner wall of said second chamber; the first locking portion includes multiple projections on an outer wall of the first housing; and in the braking position, said multiple projections are received in said recess. 18. A one way braking device, comprising: a first housing defining a first chamber containing a viscous liquid, said first housing having an outer wall which includes a first locking portion; a braking rotor rotatably received in said first chamber; a second housing defining a second chamber, said second chamber having an inner wall which includes a second locking portion engageable with the first locking portion, said first housing being moveable within said second housing between a braking position and a free running position; wherein in said braking position, said first and second locking portions are engaged, whereby rotational movement of said rotor will be braked by the viscous liquid; in said free running position, said first and second locking portions are disengaged, whereby rotational movement of said rotor will cause a free running between the first and second housings; and said first housing is moveable relative to said second housing in a plane perpendicular to a rotational shaft of said braking rotor, and limits to movements of said first housing within said second housing in said plane are defined solely by sizes and shapes of cross sections of said inner and outer walls taken in said plane. 19. The device of claim 18, wherein said first housing is moveable relative to said second housing in at least two different straight axes located in said plane. 20. A one way braking device, comprising: a first housing defining a first chamber containing a fluid, said first housing having a first locking portion; a second housing defining a second chamber, said second chamber receiving said first housing and having a second locking portion engageable with the first locking portion; a braking rotor rotatably received in said first chamber; wherein said first housing is moveable in translational motion relative to said second housing between a braking position and a released position; in said braking position, said first and second locking portions are engaged, whereby rotational movement of said rotor will be braked by the fluid; and in said released position, said first and second locking portions are disengaged.
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이 특허에 인용된 특허 (6)
Eisemann Kurt (Berlin DEX), Braking device for the cover of a chamber in a recording and/or reproducing apparatus.
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