IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0742952
(2000-12-21)
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발명자
/ 주소 |
- Glass, Douglas
- Daughtridge, Ty Bennett
- Kaiser, Albert Merrell
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출원인 / 주소 |
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대리인 / 주소 |
O'Connor, CozenFein, Michael B.Belles, Brian L.
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인용정보 |
피인용 횟수 :
0 인용 특허 :
8 |
초록
▼
An in-line roller skate propulsion device comprising a lever and a wheel frame having a top, a bottom, a plurality of wheel axle holes near the bottom, a pivot connection near the top for pivotally connecting the lever to the wheel frame, and a hole and shaft combination for connecting a resilient m
An in-line roller skate propulsion device comprising a lever and a wheel frame having a top, a bottom, a plurality of wheel axle holes near the bottom, a pivot connection near the top for pivotally connecting the lever to the wheel frame, and a hole and shaft combination for connecting a resilient member. The lever's pivot connection is located forward of the center of the lever. As the lever rotates around its pivotal connection to the wheel frame, the resilient member is stretched. Upon release of the rotating force, the resilient member returns the lever to a point of contact with the wheel frame or a stopping piece attached thereto. This action allows a skater to achieve greater speeds than with regular in-line roller skates while exerting the same amount of energy.
대표청구항
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An in-line roller skate propulsion device comprising a lever and a wheel frame having a top, a bottom, a plurality of wheel axle holes near the bottom, a pivot connection near the top for pivotally connecting the lever to the wheel frame, and a hole and shaft combination for connecting a resilient m
An in-line roller skate propulsion device comprising a lever and a wheel frame having a top, a bottom, a plurality of wheel axle holes near the bottom, a pivot connection near the top for pivotally connecting the lever to the wheel frame, and a hole and shaft combination for connecting a resilient member. The lever's pivot connection is located forward of the center of the lever. As the lever rotates around its pivotal connection to the wheel frame, the resilient member is stretched. Upon release of the rotating force, the resilient member returns the lever to a point of contact with the wheel frame or a stopping piece attached thereto. This action allows a skater to achieve greater speeds than with regular in-line roller skates while exerting the same amount of energy. iasing member for biasing said contact surface toward said peripheral surface on said shaft, said second seal further including a generally flexible connecting portion extending in a radial direction relative to said shaft longitudinal axis between said first and said second ends on said second seal, and wherein said generally flexible connecting portion is bellows-like and flexes responsive to radial or axial movement of said shaft relative to said stationary member such that said contact surface remains in a desired contact with said peripheral surface on said shaft. 2. The assembly of claim 1, wherein said first seal is generally annular and includes an inner and an outer periphery, a front face extending radially between said inner and outer periphery and a rear face extending radially between said inner and outer periphery and wherein said turbine blade portions are circumferentially spaced about said front face. 3. The assembly of claim 2, wherein said turbine blade portions each have a length, a height and a width and wherein said length is greater that said height and said width, said length extending in a generally radial direction relative to said shaft and said height extending in a generally axial direction relative to said shaft, and wherein said height is defined by a distance between an end face on said turbine blade portions and said first seal front face. 4. The assembly of claim 3, wherein said turbine blade portions extend away from said front face at a predetermined angle. 5. The assembly of claim 4, wherein said angle is approximately 90 degrees. 6. The assembly of claim 3, wherein said first seal rear face includes a plurality of annular grooves near said outer periphery. 7. The assembly of claim 1, wherein said second seal further comprises a second contact surface at said second end and a biasing member that biases said second contact surface toward said peripheral surface on said shaft. 8. The assembly of claim 7, wherein said second contact surface is spaced from said first contact surface in an axial direction relative to said shaft such that a pocket portion extends generally between said first and second contact surfaces. 9. The assembly of claim 8, wherein said pocket portion includes a porous material within said pocket portion, said porous material being adapted to absorb and contain fluid within said pocket portion. 10. The assembly of claim 8, wherein said second end of said second seal includes a plurality of openings to allow fluid communication into and out of said pocket portion. 11. The assembly of claim 10, wherein said second seal is generally annular and made from a rubber material. 12. A sealing device for sealing an interface between a shaft that is adapted to rotate and a stationary member that surrounds at least a portion of the shaft, comprising: a mounting portion adapted to be supported by the stationary member for remaining stationary with the stationary member; a sealing body portion that includes a contact surface that contacts a peripheral surface on the shaft so that the shaft can rotate relative to said sealing body portion; a biasing member for biasing said contact surface toward the peripheral surface on the shaft; and a generally flexible bellows-like connecting portion extending in a radial direction relative to the shaft between said mounting portion and said sealing body portion, said generally flexible connecting portion flexing responsive to radial and axial movement of the shaft relative to the stationary member such that said contact surface remains in a desired contact with the peripheral surface on the shaft. 13. The device of claim 12, further comprising a second contact surface on said sealing body portion and a biasing member that biases said second contact surface toward said peripheral surface on the shaft, wherein said second contact surface is spaced from said contact surface in an axial direction relative to said shaft such that a pocket porti on extends generally between said contact surface and second contact surfaces. 14. The device of claim 12, wherein said pocket portion includes a porous material within said pocket portion, said porous material being adapted to absorb and contain fluid within said pocket portion. 15. The device of claim 13, wherein said sealing body portion includes a plurality of circumferentially spaced openings to allow fluid communication into and out of said pocket portion. 16. An assembly, comprising: a shaft having a longitudinal axis and being supported to rotate about said axis; a stationary member that surrounds at least a portion of said shaft such that a partially spaced interface exists between said shaft and said stationary member and said shaft rotates relative to said stationary members; a first seal support approximate to said interface for rotation with said shaft including a plurality of turbine blade portions that create a fluid disturbance proximate to said interface as said shaft and said first seal rotate; and a second seal supported for remaining stationary with said stationary member so that said shaft rotates relative to said second seal, said second seal including a first end that is supported on a portion of -said stationary member and a second end that includes a first contact surface that contacts a peripheral surface on said shaft and a biasing member for biasing said first contact surface toward said peripheral surface on said shaft, said second seal including a second contact surface at said second end and a biasing member that biases said second contact surface toward said peripheral surface on said shaft, said second contact surface being spaced from said first contact surface in an axial direction relative to said shaft such that a pocket portion exists between said first and second contact surfaces, said pocket portion including a porous material within said pocket portion, said porous material being adapted to absorb and contain fluid within said pocket portion, said second seal further including a generally flexible connecting portion extending between said first and second ends on said second seal, and wherein said generally flexible connecting portion flexes responsive to radial or axial movement of said shaft relative to said stationary member such that said contact surface remains in a desired contact with said peripheral surface on said shaft. 17. An assembly, comprising: a shaft having a longitudinal axis and being supported to rotate about said axis; a stationary member that surrounds at least a portion of said shaft such that a partially spaced interface exists between said shaft and said stationary member and said shaft rotates relative to said stationary members; a first seal support approximate to said interface for rotation with said shaft including a plurality of turbine blade portions that create a fluid disturbance proximate to said interface as said shaft and said first seal rotate; and a second seal supported for remaining stationary with said stationary member so that said shaft rotates relative to said second seal, said second seal including a first end that is supported on a portion of said stationary member and a second end that includes a first contact surface that contacts a peripheral surface on said shaft and a biasing member for biasing said contact first surface toward said peripheral surface on said shaft, said second seal including a second contact surface at said second end and a biasing member that biases said second contact surface toward said peripheral surface on said shaft, said second contact surface being spaced from said first contact surface in an axial direction relative to said shaft such that a pocket portion exists between said first and second contact surfaces, said second end of said second seal including a plurality of openings to allow fluid communication into and out of said pocket portion, said second seal further including a generally
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