Force-transmitting device with a calibration weight that can be coupled and uncoupled
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G01G-001/38
G01G-023/01
G01G-021/00
출원번호
US-0970307
(2010-12-16)
등록번호
US-8581121
(2013-11-12)
우선권정보
EP-09180142 (2009-12-21)
발명자
/ 주소
Burkhard, Hans-Rudolf
Schneider, Ferdinand
Genoud, Dominique
출원인 / 주소
Mettler-Toledo AG
대리인 / 주소
Standley Law Group LLP
인용정보
피인용 횟수 :
2인용 특허 :
6
초록▼
The disclosed embodiments describe force-transmitting devices for use in gravimetric measuring instruments. The force-transmitting devices scale the force from a calibration weight to facilitate calibration and weighing. The devices comprise unidirectional coupling elements. The unidirectional coupl
The disclosed embodiments describe force-transmitting devices for use in gravimetric measuring instruments. The force-transmitting devices scale the force from a calibration weight to facilitate calibration and weighing. The devices comprise unidirectional coupling elements. The unidirectional coupling element comprises coupling element parts. The elements may be adapted to transmit only a tensile force or only a compressive force to a measurement transducer. Adapting the unidirectional coupling element to transmit one type of force or the other may be done by selecting an appropriate arrangement of coupling element parts. The coupling element parts are adapted to transmit force along a midline axis by either a projection and v-shaped groove coupling or projections on the first part mated with surfaces on the second part adapted to receive and guide the first part.
대표청구항▼
1. A force-transmitting device for use in a gravimetric measuring instrument, the device comprising: a stationary part;a measurement transducer arranged on the stationary part;a load-receiving part, linked for force transmission to the measurement transducer, directly or indirectly through an interm
1. A force-transmitting device for use in a gravimetric measuring instrument, the device comprising: a stationary part;a measurement transducer arranged on the stationary part;a load-receiving part, linked for force transmission to the measurement transducer, directly or indirectly through an intermediate part;a calibration weight;a calibration lever, with a fulcrum that is based on the stationary arm, the fulcrum dividing the calibration lever into first and second calibration lever arms; anda unidirectional coupling element, comprising: a first coupling element part, connected through a first flexure pivot to a fixed place on one of: the load-receiving part and the intermediate part; anda second coupling element part, connected through a second flexure pivot to a fixed place on the second calibration lever arm,the respective coupling elements aligned with each other so that a force from the calibration weight, which is solidly connected to the first calibration arm, is transmitted from the second flexure pivot to the first flexure pivot, the force transmitted being exclusively tensile or exclusively compressive. 2. The force transmitting device of claim 1, further comprising: a pair of facing surfaces, one facing surface on each of the respective coupling element parts, the first facing surface comprising two projections that protrude therefrom, the two projections arranged mirror-symmetrically relative to a central longitudinal axis of the flexure pivot associated with the coupling element part on which the projections are located, and the second facing surface comprising two receiving surfaces that are arranged mirror-symmetrically relative to a central longitudinal axis of the flexure pivot associated with the coupling element part on which the receiving surfaces are located, such that the receiving surfaces encloses, between the receiving surface and the central longitudinal axis, an angle a that satisfies the condition:90°≧α≧ arccos (b/s), where b is a perpendicular distance of the projections from the central longitudinal axis and where s is a distance of the receiving surfaces from a bending axis of the flexure pivot associated with the coupling element part on which the receiving surfaces are located. 3. A gravimetric measuring instrument comprising: a force-transmitting device according to claim 1. 4. The device according to claim 1 , wherein: the load-receiving part, the stationary part, the calibration lever and the unidirectional coupling element are adapted to form a monolithic unit. 5. The device according to claim 1 , further comprising: an upper parallel guide; anda lower parallel guide;the parallel guides link the load-receiving part to the stationary part and guide the load-receiving part in vertical movement when the force-transmitting device is in operating position. 6. The device according to claim 5, wherein: the load-receiving part, the stationary part, the calibration lever and the unidirectional coupling element are adapted to form a monolithic unit. 7. The device according to claim 1 , wherein: the second coupling element part comprises a surface which faces towards the first coupling element part, the surface comprises two projections that protrude from the surface and are arranged mirror-symmetrically relative to a central longitudinal axis of the second flexure pivot; andthe first coupling element part further comprises two receiving surfaces facing towards the second coupling element part, which are arranged mirror-symmetrically relative to the central longitudinal axis of the first flexure pivot. 8. The device according to claim 7, wherein the angle α enclosed between each of the receiving surfaces and the central longitudinal axis satisfies the condition: 90°≧α≧ arccos (b/s). 9. The device according to claim 8, further comprising: an upper parallel guide; anda lower parallel guide;the parallel guides link the load-receiving part to the stationary part and guide the load-receiving part in vertical movement when the force-transmitting device is in operating position. 10. The device according to claim 9, wherein: the load-receiving part, the stationary part, the calibration lever and the unidirectional coupling element are adapted to form a monolithic unit. 11. The device according to claim 1 , wherein: the first coupling element part comprises a first traction element with a projection;the second coupling element part comprises a second traction element with a V-shaped bearing;wherein the first coupling element part and the second coupling element part are hooked into each other, the projection is aligned with the V-shaped bearing and, the projection is in force-transmitting contact with the V-shaped bearing when tensile forces are applied to the unidirectional coupling element. 12. The device according to claim 11, further comprising: an upper parallel guide; anda lower parallel guide;the parallel guides link the load-receiving part to the stationary part and guide the load-receiving part in vertical movement when the force-transmitting device is in operating position. 13. The device according to claim 12, wherein: the load-receiving part, the stationary part, the calibration lever and the unidirectional coupling element are adapted to form a monolithic unit. 14. The device according to claim 1 , wherein: the first coupling element part and the second coupling element part are connected to each other by means of a flexible hinge, the opening direction of the flexible hinge is arranged in accordance with the central longitudinal axis of the first and second flexure pivots;the first coupling element part comprises a projection; andthe second coupling element part comprises a contact surface, oriented to cooperate with the projection. 15. The device according to claim 14, further comprising: an upper parallel guide; anda lower parallel guide;the parallel guides link the load-receiving part to the stationary part and guide the load-receiving part in vertical movement when the force-transmitting device is in operating position. 16. The device according to claim 15, wherein: the load-receiving part, the stationary part, the calibration lever and the unidirectional coupling element are adapted to form a monolithic unit. 17. The gravimetric measuring instrument according to claim 3, wherein: the force-transmitting device is arranged so that the weight force of the calibration weight is transmitted to the measurement transducer in the same direction as a force acting on the load-receiving part. 18. The gravimetric measuring instrument according to claim 3, wherein: the force-transmitting device is arranged so that the weight force of the calibration weight is transmitted to the measurement transducer in the opposite direction compared to a force acting on the load-receiving part. 19. The gravimetric measuring instrument according to claim 3 wherein: the calibration weight is made of a corrosion-resistant material with a density of ρ =8.0 kg/dm3.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (6)
Kroll William (Medina MN) Browne Mark (Osseo MN) Bartsch Tom (Plymouth MN) Evenson Randie (Brooklyn Center MN), Aircraft weighing scale with improved base, platform and load cell mounting assembly.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.