IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0101681
(2002-03-20)
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발명자
/ 주소 |
- Oh, Michael Hung-Sun
- Parsons, Gerald R.
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출원인 / 주소 |
- Invensys Building Systems Inc.
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대리인 / 주소 |
Leydig, Voit & Mayer, Ltd.
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인용정보 |
피인용 횟수 :
12 인용 특허 :
6 |
초록
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A manual override mechanism is presented for a motor driven rotary actuator that allows the output of the actuator to be manually positioned. Once positioned, the output of the actuator may be locked by a locking mechanism to prevent this output from rotating to its quiescent position. When incorpor
A manual override mechanism is presented for a motor driven rotary actuator that allows the output of the actuator to be manually positioned. Once positioned, the output of the actuator may be locked by a locking mechanism to prevent this output from rotating to its quiescent position. When incorporated in a spring return rotary actuator, the manual override may be used to apply a preload on the spring before the driven device is connected. When the actuator is used to drive a valve or damper, the preload applies a positive closing force on the damper in its zero position to ensure a tight closure of the valve or damper. The locking mechanism engages the gear train and opposes the closing force applied by the spring return of the actuator. To disengage the locking mechanism automatically, the motor applies a forward kick to the gear train. Manual disengagement is also provided.
대표청구항
▼
A manual override mechanism is presented for a motor driven rotary actuator that allows the output of the actuator to be manually positioned. Once positioned, the output of the actuator may be locked by a locking mechanism to prevent this output from rotating to its quiescent position. When incorpor
A manual override mechanism is presented for a motor driven rotary actuator that allows the output of the actuator to be manually positioned. Once positioned, the output of the actuator may be locked by a locking mechanism to prevent this output from rotating to its quiescent position. When incorporated in a spring return rotary actuator, the manual override may be used to apply a preload on the spring before the driven device is connected. When the actuator is used to drive a valve or damper, the preload applies a positive closing force on the damper in its zero position to ensure a tight closure of the valve or damper. The locking mechanism engages the gear train and opposes the closing force applied by the spring return of the actuator. To disengage the locking mechanism automatically, the motor applies a forward kick to the gear train. Manual disengagement is also provided. ing: a first tubular sleeve disposed about only a portion of said column and which is longitudinally adjustable relative to said column,an appendage rigidly secured to said first sleeve and extending longitudinally therefrom and defining a jaw facing said column and formed with a radial ledge spaced radially from said column and located remote from said sleeve wherein said ledge terminates at radial inboard and radial outboard extremities and said jaw is formed with a wedging surface that extends from said radial outboard extremity of said ledge and slopes both inwardly toward said column and longitudinally toward said first sleeve, andan annular wedging plate having an opening therethrough just large enough to allow said wedging plate to move freely along said column when oriented perpendicular thereto and said wedging plate is located about said column so as to project outwardly therefrom and into said jaw and said wedging plate has a peripheral edge that terminates between said inboard and outboard extremities of said ledge.9. The device according to claim 8 wherein said appendage extends downwardly from said first sleeve, and further comprising a stand having legs that diverge from said first sleeve to support said sleeve and said column above said underlying surface, and further comprising a second tubular sleeve disposed about only another portion of said column and above said first sleeve, and a second appendage rigidly secured to said second sleeve to project downwardly therefrom and said second appendage defines a stepping jaw facing said column and formed with a radial, upwardly facing ledge spaced radially from said column and located remote from said sleeve wherein said ledge terminates at radial inboard and radial outboard extremities, and said stepping jaw is formed with a downwardly facing wedging surface that extends from said radial outboard extremity of said upwardly facing ledge and slopes both inwardly toward said column and upwardly toward said second sleeve, and an annular jack plate having an opening therethrough just large enough to allow said jack plate to move freely along said column when oriented perpendicular thereto and said jack plate is located about said column so as to project outwardly therefrom and into said stepping jaw, and said jack plate has a peripheral edge portion that terminates between said inboard and outboard extremities of said upwardly facing ledge, and an opposite edge portion, a jack handle attached to said opposite edge portion of said jack plate to extend radially away from said column, a spring coupled between said jack handle and said second sleeve to urge said jack handle upwardly, and a load coupling member rigidly secured to said second sleeve for engaging said load supported by said column.10. The device according to claim 9 wherein bores are defined radially through both said first and second sleeves and externally mounted, internally threaded nuts are permanently fastened on both of said sleeves in alignment with said bores therein, and said sleeves are both provided with radially directed clamping screws engaged in said externally mounted nuts on said sleeves and directed into said bores, whereby said clamping screws are releaseably advanced into said bores to completely and releaseably immobilize both of said sleeves relative to said column.11. The device according to claim 9 wherein said load coupling member is comprised of at least a first hollow, horizontal cross member tube that is rigidly and permanently secured to and oriented at right angles to said second sleeve, and a horizontal load support member extending through said first cross member tube and rigidly and releaseably secured to said first cross member tube and atop which said load rests.12. The device according to claim 11 wherein said load is comprised of at least a pair of flat, elongated planks, one on each side of said column and said planks ar e oriented perpendicular to both said column and said cross member tube, and further comprising at least a pair of lower cylindrical annular lock-down collars disposed about and rigidly and releaseably secured to said load support member and located outboard of said planks and having studs with threaded ends projecting radially and upwardly therefrom, at least a pair of upper, cylindrical, annular lock-down collars having hollow barrels oriented tangentially relative thereto, and wherein said studs of said lower lock-down collars extend coaxially through said barrels of said upper lock-down collars and said upper lock-down collars are located above the level of said planks and transversely spaced apart from each other, and lock-down nuts threadably engaged on the ends of said lower lock-down collar studs and tightened against said barrels so as to tightly clamp said planks between said lower and upper lock-down collars.13. The device according to claim 12 wherein said upper lock-down collars are coaxially aligned with each other and further comprising a horizontal lock-down pipe extending through said upper lock-down collars and rigidly and releaseably secured to said upper lock-down collars.14. The device according to claim 13 wherein each of said lock-down collars has a radial opening defined therethrough and further comprising a separate clamping screw threadably engaged relative to each of said lock-down collars and directed into said radial openings thereof to releaseably immobilize said lock-down collars relative to each other and relative to said horizontal load support member.15. The device according to claim 11 further comprising: a third tubular sleeve disposed about and rigidly secured to only a portion of said column and above said second sleeve, and at least a second hollow horizontal cross member tube that is permanently and rigidly secured to and oriented at right angles to said third sleeve, a horizontal handrail support member extending through said second horizontal cross member tube and transversely from said column, at least a fourth tubular sleeve disposed about and rigidly secured to said handrail support and having a hollow, handrail holder rigidly and permanently secured at right angles relative thereto, and a handrail extending through said handrail holder and rigidly and releaseably secured thereto.16. The device according to claim 11 further comprising an outrigger sleeve rigidly and releaseably secured to said horizontal load support member, and said outrigger sleeve has a hollow outrigger holder rigidly and permanently secured at right angles relative thereto and said outrigger holder is oriented in a vertical disposition, a vertical outrigger support member rigidly and releaseably held by said outrigger holder and extending vertically downwardly therefrom toward said underlying surface, and an outrigger base supported upon said underlying surface and rigidly and releaseably coupled to said vertical outrigger support member.17. The device according to claim 8 wherein said appendage extends vertically upwardly and said column is a hollow pipe having an open upper end, and further comprising a stand supporting said sleeve above said underlying surface, a fine adjustment coupling having a load-engaging adapter and a straight, externally threaded, cylindrical structure projecting downwardly from said load-engaging adapter and loosely into said upper end of said hollow pipe, and a wing nut located atop said upper end of said hollow pipe and threadably engaged on said externally threaded structure of said fine adjustment coupling, and said wing nut has handles that project radially beyond said upper end of said pipe.
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