IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
|
출원번호 |
US-0379488
(1999-08-23)
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발명자
/ 주소 |
- Warner, Patrick
- Harding, Michael H.
- Wu, Mu-Chuan
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출원인 / 주소 |
|
대리인 / 주소 |
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인용정보 |
피인용 횟수 :
19 인용 특허 :
67 |
초록
▼
An exercise bicycle including a frame having a seat and handlebars, a high-inertia flywheel having a hub at a center of rotation, the flywheel being rotatably supported on the frame at the hub, and a drive train including a drive sprocket, a crank arm attached to and extending from the drive sprocke
An exercise bicycle including a frame having a seat and handlebars, a high-inertia flywheel having a hub at a center of rotation, the flywheel being rotatably supported on the frame at the hub, and a drive train including a drive sprocket, a crank arm attached to and extending from the drive sprocket, and a pedal attached to the crank arm, the drive train being rotatably supported by the frame. The drive train also includes a slave sprocket fixed to the flywheel at the hub, with the drive and slave sprockets connected in a direct-drive relationship, the drive train driveable in a forward and rearward directions to cause the flywheel to rotate. A clutch mechanism is positioned in engagement with the slave sprocket and the hub to create a frictional engagement between the sprocket and the hub, and to establish a break-free force threshold. When the drive train is actuated in the forward direction, the slave sprocket and the hub move together, and when the drive train is actuated in the rearward direction under the influence of a force greater than the break-free force threshold, the clutch mechanism slips between the slave sprocket and the hub, allowing the slave sprocket and the flywheel to move independently of one another.
대표청구항
▼
An exercise bicycle including a frame having a seat and handlebars, a high-inertia flywheel having a hub at a center of rotation, the flywheel being rotatably supported on the frame at the hub, and a drive train including a drive sprocket, a crank arm attached to and extending from the drive sprocke
An exercise bicycle including a frame having a seat and handlebars, a high-inertia flywheel having a hub at a center of rotation, the flywheel being rotatably supported on the frame at the hub, and a drive train including a drive sprocket, a crank arm attached to and extending from the drive sprocket, and a pedal attached to the crank arm, the drive train being rotatably supported by the frame. The drive train also includes a slave sprocket fixed to the flywheel at the hub, with the drive and slave sprockets connected in a direct-drive relationship, the drive train driveable in a forward and rearward directions to cause the flywheel to rotate. A clutch mechanism is positioned in engagement with the slave sprocket and the hub to create a frictional engagement between the sprocket and the hub, and to establish a break-free force threshold. When the drive train is actuated in the forward direction, the slave sprocket and the hub move together, and when the drive train is actuated in the rearward direction under the influence of a force greater than the break-free force threshold, the clutch mechanism slips between the slave sprocket and the hub, allowing the slave sprocket and the flywheel to move independently of one another. ng the steps of: assembling a meshwork grid having first and second spaced apart gridwork panels arranged substantially parallel to one another, each gridwork panel including a plurality of interconnected crossing wires; embedding at least one edge of said grid in a detachable spacer; inserting said grid into a mold having detachable mold sections; applying to the mold one surface layer which is applied to the mold as a formulation of gypsum, cement and a catalyst in fluid form to a thickness covering said first gridwork panel in the mold, said one surface layer hardening after being allowed to set; adding to the mold an insulating layer which is applied to the mold as a formulation of gypsum, cement, perlite and a catalyst in fluid form to a thickness below a level at which said second gridwork panel is located in the mold, said insulating layer hardening after being allowed to set; applying to the mold a second surface layer which is applied to the mold as a formulation of gypsum, cement and a catalyst in fluid form to a selected thickness substantially equal to the thickness of said one surface layer, said second layer hardening after being allowed to set; detaching said mold sections after all of said layers have set; and detaching said spacer from said one edge of the grid to expose said one edge. 2. A process as set forth in claim 1, wherein said grid includes a plurality of connecting wires extending between the wires of said spaced apart gridwork panels. me left and right windows; a plurality of pins formed on said base frame, one each of said plurality of pins positioned adjacent a corner of said base frame left and right windows and to engage the first and second film; and a plurality of pin holes formed in said cover frame corresponding to said plurality of pins, whereby the left and right curved lateral ends facilitate insertion of the slide mount into the stereo slide holder. 7. A stereo slide mount as in claim 6 wherein: the left and right curved lateral ends are arcuate having the center of a radius for the left and right curved lateral ends placed substantially at the center of the slide mount. 8. A stereo slide mount as in claim 6 wherein: the left and right curved lateral ends are arcuate having the center of a radius for the left and right curved lateral ends displaced laterally from the center of the slide mount. contact with the central portion. The sight mechanism including a circular aperture passing through the proximal end, the central portion, and the distal end of the sight mechanism. An interchangeable proximal circular member may be attached to the proximal end of the sight mechanism, and an interchangeable distal circular member may be attached to the distal end of the sight mechanism. apparatus is drawn over a material to be cut and wherein the cutting position is such that the cutting edge of the blade inclines rearwardly with respect to the guiding surface such that, when the cutting apparatus is drawn rearwardly with the guiding surface in contact with the material to be cut, the cutting edge advances through the material at an acute angle. 6. The cutting apparatus of claim 1 wherein the blade holder is pivotably displaceable from the fully retracted position along an arc of an imaginary circle and wherein the cutting apparatus further includes a depth adjuster selectively lockable into at least two locking positions, each locking position corresponding to a different maximum angle by which the blade holder can be displaced with respect to the fully retracted position. 7. The cutting apparatus of claim 6 wherein the blade housing further includes an elongated track extending along an imaginary chord of the imaginary circle and having fore and aft ends and wherein the depth adjuster is linearly reciprocable along the track, the depth adjuster including a button accessible to the user from the exterior of the housing and a blade-holder bearing surface movable in tandem with the button and extending laterally within the housing for selective arresting engagement with the blade holder. 8. The cutting apparatus of claim 7 wherein the blade holder includes an arresting surface extending forward of the pivot axis and adapted for alternative contacting engagement and disengagement with the blade-holder bearing surface and wherein the blade-holder bearing surface reciprocates along a linear path below the arresting surface and the arresting surface inclines rearwardly toward the pivot axis with respect to the reciprocation path of the blade-holder bearing surface such that more rearward positions of the blade-holder bearing surface correspond to greater maximum pivotal displacement angles of the blade holder than do more forward positions of the blade-holder bearing surface. 9. The cutting apparatus of claim 1 wherein the actuator slot in communication with the blade cavity is an elongated actuator slot sufficiently wide, and extending longitudinally forward of the pivot axis by a sufficient distance, to enable the blade holder to pivot upwardly and protrude out of the blade housing through the actuator slot into a blade changing position. 10. The cutting apparatus of claim 9 further including a blade-changing lock to prevent inadvertent pivoting of the blade holder into a blade changing position, the blade-changing lock including a first lock element carried by the blade housing and a second lock element carried by the blade holder, the first and second lock elements being selectively moveable into locked and unlocked positions with one another, the locked position being such that pivotal movement of the blade holder with respect to the blade housing is restricted between the fully retracted position and a cutting position and the unlocked position being such that the blade holder can pivot to a blade changing position. 11. A cutting apparatus comprising: a blade housing having forward and rear ends, left and right sides, an upper surface, a lower surface defining a guiding surface along which the cutting apparatus can be drawn across a material to be cut and an internal blade cavity including a blade opening through the guiding surface to the outside of the housing, the upper surface including an actuator slot in communication with the blade cavity; a blade holder adapted for removably retaining a cutting blade having a cutting edge, the blade holder being pivotally mounted within the housing for pivotal movement within the blade cavity about a lateral pivot axis between a fully retracted position in which the cutting edge of a cutting blade retained by the blade holder does not protrude through the blade opening to the outside of the housing and a cutting position in which at least a portion of the cuttin g edge extends through the blade opening to the outside of the housing, the cutting position being such that the cutting edge of the blade inclines rearwardly with respect to the guiding surface such that, when the cutting apparatus is drawn rearwardly with the guiding surface in contact with the material to be cut, the cutting edge advances through the material at an acute angle; a biasing member that normally biases the blade holder toward the fully retracted position; and a blade actuator depending from the blade holder and extending upwardly through the actuator slot for access from outside the housing, the blade actuator including an upper side that extends at least partially forward of the pivot axis of the blade holder such that a downwardly directed force applied forward of the pivot axis to the upper side of the blade actuator urges the blade holder toward a cutting position. 12. The cutting apparatus of claim 11 further including a depth adjuster selectively lockable into at least two locking positions, each locking position corresponding to a different maximum angle by which the blade holder can be displaced with respect to the fully retracted position. 13. The cutting apparatus of claim 12 wherein the blade holder is pivotably displaceable from the fully retracted position along an arc of an imaginary circle, the blade housing further includes an elongated track extending along an imaginary chord of the imaginary circle and the depth adjuster is linearly reciprocable along the track, the depth adjuster including a button accessible to the user from the exterior of the housing and a blade-holder bearing surface movable in tandem with the button and extending laterally within the housing for selective arresting engagement with the blade holder. 14. The cutting apparatus of claim 13 wherein the blade holder includes an arresting surface extending forward of the pivot axis and adapted for alternative contacting engagement and disengagement with the blade-holder bearing surface and wherein the blade-holder bearing surface reciprocates along a linear path below the arresting surface and the arresting surface inclines rearwardly toward the pivot axis with respect to the reciprocation path of the blade-holder bearing surface such that more rearward positions of the blade-holder bearing surface correspond to greater maximum pivotal displacement angles of the blade holder than do more forward positions of the blade-holder bearing surface. 15. The cutting apparatus of claim 11 wherein the actuator slot in communication with the blade cavity is an elongated actuator slot sufficiently wide, and extending longitudinally forward of the pivot axis by a sufficient distance, to enable the blade holder to pivot upwardly and protrude out of the blade housing through the actuator slot into a blade changing position. 16. The cutting apparatus of claim 15 further including a blade-changing lock to prevent inadvertent pivoting of the blade holder into a blade changing position, the blade-changing lock including a first lock element carried by the blade housing and a second lock element carried by the blade holder, the first and second lock elements being selectively moveable into locked and unlocked positions with one another, the locked position being such that pivotal movement of the blade holder with respect to the blade housing is restricted between the fully retracted position and a cutting position and the unlocked position being such that the blade holder can pivot to a blade changing position.
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