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| 국가/구분 | United States(US) Patent 등록 |
|---|---|
| 국제특허분류(IPC7판) |
|
| 출원번호 | US-0962467 (2001-09-25) |
| 발명자 / 주소 |
|
| 출원인 / 주소 |
|
| 대리인 / 주소 |
|
| 인용정보 | 피인용 횟수 : 106 인용 특허 : 283 |
A wellbore casing is formed simultaneously with the drilling out of the wellbore.
A wellbore casing is formed simultaneously with the drilling out of the wellbore. plate coupled to said clutch shaft, said clutch plate having a clutch shear area; a pulley56 operatively connected to said clutch shaft by a bearing, said pulley capable of independently rotating around said clutch sha
A wellbore casing is formed simultaneously with the drilling out of the wellbore. plate coupled to said clutch shaft, said clutch plate having a clutch shear area; a pulley56 operatively connected to said clutch shaft by a bearing, said pulley capable of independently rotating around said clutch shaft when a drive belt coupled to said pulley and an engine crankshaft is rotated, said pulley having a pulley shear area; a cover coupled to said pulley, said cover and said clutch plate defining a reservoir; a working chamber defined by said pulley and said clutch plate; a shear area defined by said clutch shear area and said pulley shear; and a viscous fluid contained within said reservoir, said working chamber, and said shear area, wherein said rotation of said pulley around said clutch shaft in response to movement of said drive belt causes said viscous fluid to shear in said shear area, thereby creating torque to drive said clutch plate in response to the torque, thereby causing rotation of said clutch shaft and said water pump shaft;operatively coupling said viscous coupling to the water pump such that said working chamber of said viscous coupling is located externally with respect to a water pump housing, said water pump having an impeller; andengaging said viscous coupling to control the rotational speed of said impeller as a function of the speed of the engine.6. The method of claim 5, wherein the steps of operatively coupling a viscous coupling to a crankshaft pulley with a drive belt and operatively coupling said viscous coupling to a water pump comprises the steps of:operatively coupling a water-cooled viscous coupling100 having an impeller116 to a crankshaft pulley with a drive belt104, said crankshaft pulley being coupled to an engine crankshaft and capable of rotating at a speed equal to the rotational speed of the engine crankshaft, wherein said engine crankshaft rotational speed is a function of the speed of an engine.7. The method of claim 6, wherein the step of engaging said water-cooled viscous coupling to control the rotational speed of the impeller116 as a function of the speed of the engine comprises the steps of:rotating an engine crankshaft at a first rotational speed equal to the speed of the engine, wherein said rotation of said engine crankshaft induces rotation of said coupled crankshaft pulley and said drive belt104, wherein the rotation of drive belt104 induces rotation of an outer rotating portion102 of said water-cooled viscous coupling100, wherein said rotation of said outer rotating portion102 in turn rotates a water pump bearing shaft108 coupled to said outer rotating portion102, wherein said rotation of said water pump bearing shaft108 in turn rotates a clutch plate112 coupled to said water pump bearing shaft108, wherein the rotation of said clutch plate112 creates shearing of a viscous fluid contained within a shear area122, said shear area122 defined between an impeller assembly shear area of an impeller assembly114 and a clutch shear area of said clutch plate112, wherein said shearing drives a rotational response of said impeller assembly114 at a second rotational speed, thereby rotating said impeller assembly114 rotatably mounted to said water pump bearing shaft108 at said second rotational speed, thereby rotating an impeller116 coupled to said impeller assembly114 to pump engine coolant through the cooling system.8. The method of claim 7, wherein said second rotational speed is a function of a shearing rate of said viscous fluid within said shear area122 at said first rotational speed.9. The method of claim 8, wherein said shearing rate is also a function of the amount of said viscous fluid contained within said shear area122, the viscosity of said viscous fluid contained within said shear area122, the composition of said viscous fluid, the shape of said impeller assembly shear area, and the shape of said clutch shear area. a valve closing electromagnet and a valve opening electromagnet periodically, one of the valve opening electromagnet and the valve closing electromagnet is de-energized and thereafter the other electromagnet is de-energized at a time delayed by a predetermined time Toff. The alternate energization process is finished when the displaced position of a valve head which is detected by a displacement sensor has reached a predetermined position Vinit while the valve opening electromagnet is being energized. Thereafter, the valve opening electromagnet is continuously energized to seat the valve head in a closed position (initial position) from the time when the displaced position of the valve head has reached a predetermined position Vstart. said floating puller rolls with a minimum spacing defined therebetween sufficient to enable said projecting teeth of said driven puller roll to mesh with said projecting teeth of said floating puller rolls to cause said floating puller rolls to rotate and to positively engage the yarns at multiple areas of contact as the yarns move along a yarn engagement path therebetween so as to place tension on the yarns passing therebetween without pinching the yarns and with slippage of the yarns from between the puller rolls minimized.2. The puller roller system of claim 1, wherein the yarns are extended around and engaged at a wrap portion defined along said driven puller roll between said multiple areas of contact.3. The puller roller system of claim 1 and further comprising a pair of spaced mounting brackets.4. The puller roller system of claim 3 and wherein said mounting brackets each include a proximal bearing member and a distal bearing member laterally adjustable with respect to said proximal bearing member.5. The puller roller system of claim 4 wherein said driven puller roll is mounted on said proximal bearing members and said floating puller rolls are mounted on said distal bearing member so as to be moved toward and away from said driven puller roll for adjusting the spacings between said driven and floating puller rolls with the movement of said distal bearing members with respect to said proximal bearing members.6. A puller roller system for tensioning the yarns between yarn feed rollers and the needles of the tufting machine, comprising: at least one rotatably mounted elongated power driven puller roll having a series of radially projecting teeth;a series of floating puller rolls mounted in a vertically spaced relationship to one another, with said driven puller roll disposed partially between said floating puller rolls, said floating puller rolls each having a series of radially projecting teeth;wherein said driven puller roll is disposed in an intermeshing, driving relationship with said floating puller rolls with a minimum spacing defined therebetween sufficient to enable said projecting teeth of said driven puller roll to mesh with said projecting teeth of said floating puller rolls to cause said floating puller rolls to rotate and to positively engage and tension the yarns at multiple areas of contact.7. The puller roller system of claim 6, wherein said driven puller roll includes a central axis that is laterally offset from a central axis of each said floating puller rolls.8. In a tufting machine of the type having a machine frame, and at least one reciprocable needle bar having a series of spaced needles mounted therealong, each carrying a yarn for forming tufts of yarns in a backing material passing therebeneath, the improvement therein comprising: a puller roll assembly mounted to the machine frame for tensioning the yarns being fed to the needles, said puller roll assembly comprising:a driven puller roll having a series of radially projecting teeth; anda pair of floating puller rolls mounted at spaced positions, each laterally offset from said driven puller roll and with each of said floating puller rolls having a series of radially projecting teeth adapted to engage and mesh with said teeth of said driven puller roll to cause rotation of said floating puller rolls;wherein a yarn engagement path is defined between said driven and floating puller rolls along which the yarns are engaged at multiple points of contact, and wherein said floating puller rolls are positioned at a minimum spacing from said driven puller roll sufficient to enable positive engagement and tensioning of the yarns at said multiple points of contact without requiring tight pinching contact of the yarns between said teeth of said puller rolls.9. The tufting machine of claim 8, wherein said floating puller rolls are mounted in a vertically spaced
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