Ratcheting winch with a magnetically biased pawl
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B21F-009/00
B66F-003/00
출원번호
US-0239538
(2005-09-29)
등록번호
US-7258324
(2007-08-21)
발명자
/ 주소
Gilman,Jeffry S.
출원인 / 주소
Gilman,Jeffry S.
대리인 / 주소
Kriegsman & Kriegsman
인용정보
피인용 횟수 :
12인용 특허 :
4
초록▼
A winch for controlling the tautness of a length of wire includes a generally U-shaped frame and a spindle rotatably mounted on the frame, the spindle serving as a spool on which the length of wire can be wound. The winch additionally includes a ratchet rotatably mounted on the frame in co-axial ali
A winch for controlling the tautness of a length of wire includes a generally U-shaped frame and a spindle rotatably mounted on the frame, the spindle serving as a spool on which the length of wire can be wound. The winch additionally includes a ratchet rotatably mounted on the frame in co-axial alignment with the spindle, the ratchet being fixedly connected to one end of the spindle using the combination of a threaded bolt and a washer. Furthermore, the winch includes a pawl pivotally mounted on the frame, the pawl capable of being pivoted between a first position in which the pawl sequentially engages outwardly extending teeth in the ratchet so as to limit rotation of the ratchet in only one direction and a second position in which the pawl disengages from the ratchet to allow for rotation of the ratchet in either of two opposing directions. First, second and third rare earth magnets are mounted in the frame and, in combination with a pair of outwardly projecting ferritic arms provided in the pawl, serve to magnetically bias the pawl into either of its first and second positions.
대표청구항▼
What is claimed is: 1. A winch comprising, (a) frame, (b) a spindle rotatably mounted on the frame, the spindle containing a supply of wound wire, (c) a ratchet fixedly coupled to the spindle for rotable movement with said spindle, the ratchet including a ratchet wheel, (d) a pawl having a first pa
What is claimed is: 1. A winch comprising, (a) frame, (b) a spindle rotatably mounted on the frame, the spindle containing a supply of wound wire, (c) a ratchet fixedly coupled to the spindle for rotable movement with said spindle, the ratchet including a ratchet wheel, (d) a pawl having a first pawl arm made of ferritic material; the pawl being rotably mounted on the frame and being positioned on the frame such that it can be rotated to a first position where the first pawl arm is in engagement with the ratchet wheel so as to limit rotation of the ratchet wheel in only one direction or to a second position where the first pawl arm is out of engagement with the ratchet wheel, (e) a first magnet mounted on the frame and being positioned on the frame for magnetically biasing the first pawl arm into the first position, and (f) a second magnet mounted on the frame and being positioned on the frame for magnetically biasing the first pawl arm into the second position. 2. The winch as claimed in claim 1 wherein each of the first and second magnets are rare earth magnets. 3. The winch as claimed in claim 1 wherein the pawl further comprises a base rotably mounted on the frame, the first pawl arm being fixedly mounted on the base. 4. The winch as claimed in claim 3 wherein the pawl further comprises a second pawl arm fixedly mounted on the base, the second pawl arm being constructed out of ferritic material. 5. The winch as claimed in claim 4 wherein the first and second pawl arms extend out from the base at an approximate right angle relative to one another. 6. The winch as claimed in claim 4 further comprising a third magnet mounted on the frame. 7. The winch as claimed in claim 6 wherein, with the pawl disposed in its first position, a magnetic force is established between the second pawl arm and the third magnet. 8. The winch as claimed in claim 1 wherein the spindle and ratchet are co-axially connected together. 9. The winch as claimed in claim 8 wherein the ratchet includes an internally threaded axle and the winch further includes a threaded bolt for coaxially connecting the spindle and ratchet. 10. The winch as claimed in claim 1 wherein the ratchet wheel, comprises a plurality of outwardly projecting ratchet-shaped teeth along its outer periphery. 11. The winch as claimed in claim 10 wherein each tooth comprises an elongated tapered surface and a shortened abutment surface which join together to form a pointed apex. 12. The winch as claimed in claim 1 wherein the spindle includes an elongated wire receiving portion on which a portion of the wire can be wound. 13. The winch as claimed in claim 1 wherein the frame includes a bottom wall and a pair of upwardly extending sidewalls. 14. The winch as claimed in claim 13 wherein the frame is provided with at least one mounting slot. 15. A winch comprising a frame, a spindle rotably mounted on the frame, a ratchet fixedly coupled to the spindle, the spindle containing a supply of wound wire, the ratchet including a ratchet wheel, a pawl rotably mounted on the frame, the pawl including a first pawl arm made of ferritic material, the pawl being positioned on the frame such that the first pawl arm can be placed in a first position where it is in engagement with the ratchet wheel or a second position where it is out of engagement with the ratchet wheel, a first magnet mounted on the frame and positioned for biasing the first pawl arm into the first position, a second magnet mounted on the frame and positioned for biasing the first pawl arm into the second position a second pawl arm of ferritic material and a third magnet mounted on the frame, the third magnet being positioned on the frame and the second pawl arm being positioned on the pawl such that the second arm is attracted by the third magnet when the first pawl arm is in its first position.
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이 특허에 인용된 특허 (4)
.ANG.hs Wilgot,SEX, Device for the operation of an instrument, for example an axle.
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