Patents by Inventor Jong O. Ra

Jong O. Ra has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5525116
    Abstract: A stepless automatic variable transmission with gears in a state of constant meshing which is operational without the need for disengaging or changing the gears such that the rotational output power can be varied to effect a neutral, low speed, medium speed, high speed, overdrive or reverse rotation by selecting a stepless automatic speed change method or a manual speed change method, and which includes a speed change system, an overdrive system and a speed change controlling system.The assembly of speed change system (10, 110, 310, 410, 510, 610), the overdrive system (50, 360, 660, 760) and the speed change controlling system (80, 180, 380, 680, 780) can vary with each of the systems combined to result in numerous stepless automatic variable transmissions. To effect speed changes low speed, medium speed, overdrive, and reverse rotation brake means are used. Also, either the manual speed change method or the automatic speed change method can be selected.
    Type: Grant
    Filed: February 24, 1995
    Date of Patent: June 11, 1996
    Assignee: Hae Sung Engineering Co., Ltd.
    Inventors: Jong O. Ra, Joon Y. Lim, Wan M. Yoo
  • Patent number: 5484349
    Abstract: A stepless automatic variable transmission with gears in a state of constant meshing which is operational without the need for disengaging or changing the gears such that the rotational output power can be varied to effect a neutral, low speed, medium speed, high speed, overdrive or reverse rotation by selecting a stepless automatic speed change method or a manual speed change method, and which includes a speed change system, an overdrive system and a speed change controlling system.The assembly of speed change system (10, 110, 310, 410, 510, 610), the overdrive system (50, 360, 660, 760) and the speed change controlling system (80, 180, 380, 680, 780) can vary with each of the systems combined to result in numerous stepless automatic variable transmissions. To effect speed changes low speed, medium speed, overdrive, and reverse rotation brake means are used. Also, either the manual speed change method or the automatic speed change method can be selected.
    Type: Grant
    Filed: February 24, 1995
    Date of Patent: January 16, 1996
    Assignee: Hae Sung Engineering Co., Ltd.
    Inventors: Jong O. Ra, Joon Y. Lim, Wan M. Yoo
  • Patent number: 5484344
    Abstract: A stepless automatic variable transmission with gears in a state of constant meshing which is operational without the need for disengaging or changing the gears such that the rotational output power can be varied to effect a neutral, low speed, medium speed, high speed, overdrive or reverse rotation by selecting a stepless automatic speed change method or a manual speed change method, and which includes a speed change system, an overdrive system and a speed change controlling system.The assembly of speed change system, the overdrive system and the speed change controlling system can vary with each of the systems combined to result in numerous stepless automatic variable transmissions. To effect speed changes low speed, medium speed, overdrive, and reverse rotation brake devices are used. Also, either the manual speed change method or the automatic speed change method can be elected.
    Type: Grant
    Filed: February 24, 1995
    Date of Patent: January 16, 1996
    Assignee: Hae Sung Engineering Co., Ltd.
    Inventors: Jong O. Ra, Joon Y. Lim, Wan M. Yoo
  • Patent number: 5466196
    Abstract: A stepless automatic variable transmission with gears in a state of constant meshing which is operational without the need for disengaging or changing the gears such that the rotational output power can be varied to effect a neutral, low speed, medium speed, high speed, overdrive or reverse rotation by selecting a stepless automatic speed change method or a manual speed change method, and which includes a speed change system, an overdrive system and a speed change controlling system.The assembly of speed change system (10, 110, 310, 410, 510, 610), the overdrive system (50, 360, 660, 760) and the speed change controlling system (80, 180, 380, 680, 780) can vary with each of the systems combined to result in numerous stepless automatic variable transmissions. To effect speed changes low speed, medium speed, overdrive, and reverse rotation brake means are used. Also, either the manual speed change method or the automatic speed change method can be selected.
    Type: Grant
    Filed: February 24, 1995
    Date of Patent: November 14, 1995
    Assignee: Hae Sung Engineering Co., Ltd.
    Inventors: Jong O. Ra, Joon Y. Lim, Wan M. Yoo
  • Patent number: 5415597
    Abstract: A stepless automatic variable transmission with gears in a state of constant meshing which is operational without the need for disengaging or changing the gears such that the rotational output power can be varied to effect a neutral, low speed, medium speed, high speed, overdrive or reverse rotation by selecting a stepless automatic speed change method or a manual speed change method, and which includes a speed change system, an overdrive system and a speed change controlling system.The assembly of speed change system (10, 110, 310, 410, 510, 610), the overdrive system (50, 360, 660, 760) and the speed change controlling system (80, 180, 380, 680, 780) can vary with each of the systems combined to result in numerous stepless automatic variable transmissions. To effect speed changes low speed, medium speed, overdrive, and reverse rotation brake means are used. Also, either the manual speed change method or the automatic speed change method can be selected.
    Type: Grant
    Filed: December 10, 1993
    Date of Patent: May 16, 1995
    Assignees: Jong O. Ra, Joon Y. Lim
    Inventors: Jong O. Ra, Joon Y. Lim, Wan M. Yoo
  • Patent number: 5364320
    Abstract: A continuous automatic variable speed transmission comprising an input sun gear 14 or receiving rotational power, an input differential gear 38A meshed with the input sun gear 14, an output differential gear 42A and a reverse rotation differential gear 46A integrally formed with the input differential gear 38A, a transmission differential gear 54A meshed with the input differential gear 38A, a medium speed differential gear 58A integrally formed with the transmission differential gear 54A, locking pins 36A, 52A and carriers 32, 34 supporting each differential gear, an output sun gear 24 integrally formed with an output shaft 22 and meshed with the inside of the output differential gear 42A, a medium speed sun gear 28 integrally formed with a medium speed control shaft 26 and meshed with the inside of the medium speed differential gear 58A, a reverse rotation sun gear 18 integrally formed with a reverse rotation control shaft 16 and meshed with the inside of the reverse rotation differential gear 46A, a low sp
    Type: Grant
    Filed: March 10, 1993
    Date of Patent: November 15, 1994
    Assignees: Jong Oh Ra, Joon Young Lim
    Inventors: Jong O. Ra, Joon Y. Lim, Wan M. Yoo
  • Patent number: 5330395
    Abstract: A transmission having an input shaft with an input sun gear and a reverse rotation control shaft with a reverse rotation sun gear rotatably secured to the input shaft. A first and a second carrier, terminating in an output shaft, are rotatably secured on the reverse rotation control shaft and input shaft, respectively. Locking pins interconnect the first and second carriers to enable simultaneous rotation of the carriers. Input planetary gears are in mechanical communication with the input sun gear. A reverse rotation planetary gear and an input planetary gear are interconnected and each such interconnected gear is rotatably mounted on a locking pin to enable simultaneous rotation of the interconnected gears about the locking pin. Each reverse rotation planetary gear is in mechanical communication with the reverse rotation sun gear. A low speed ring gear is rotatably secured on the second carrier.
    Type: Grant
    Filed: July 28, 1992
    Date of Patent: July 19, 1994
    Assignees: Jong Oh Ra, Joon Young Lim
    Inventors: Jong O. Ra, Joon Y. Lim, Wan M. Yoo
  • Patent number: 5326334
    Abstract: An automatic variable speed transmission with an input shaft, an input sun gear formed on the input shaft and a first and second carrier rotatably mounted on the input shaft with the second carrier terminating in an output shaft. First and second locking pins secure and interconnect the two carriers together to enable simultaneous rotation of the carriers. A low speed ring gear is rotatably mounted on the input shaft. A first differential gear is rotatably mounted on each first locking pin and each first differential gear is in mechanical communication with the input sun gear and the low speed ring gear. A reverse ring gear is rotatably mounted on the output shaft. A second differential gear is rotatably mounted on each second locking pin and each second differential gear is in mechanical communication with the reverse rotation ring gear and with a first differential gear.
    Type: Grant
    Filed: June 23, 1992
    Date of Patent: July 5, 1994
    Inventors: Jong O. Ra, Joon Y. Lim
  • Patent number: 5322488
    Abstract: A transmission having an input shaft with a sun gear (12), a medium speed shaft with a sun gear (14) rotatably mounted on the input shaft, a low speed shaft with a sun gear (16) rotatable mounted on the medium speed shaft and a reverse rotation shaft with a sun gear (18) rotatable mounted on the low speed shaft. A first carrier and a second carrier terminating in an output shaft are rotatably mounted on the reverse shaft and input shaft, respectively. Locking pins interconnect first and second carriers. Reverse rotation gear is integrally formed with an input gear and rotatable mounted on a locking pin. Each reverse rotation gear meshes with the reverse sun gear (18) and each input gear meshes with sun gear (12). Low speed gears are integrally formed with a medium speed gear and rotatable mounted on a locking pin. Each low speed gear meshes with sun gear (16) and each medium speed gear meshes with the input gear and the sun gear (14).
    Type: Grant
    Filed: July 28, 1992
    Date of Patent: June 21, 1994
    Assignees: Jong O. Ra, Joon Y. Lim
    Inventors: Jong O. Ra, Joon Y. Lim, Wan M. Yoo
  • Patent number: 5106353
    Abstract: A variable transmission is disclosed. An input shaft for rotational input has a first gear securably mounted at the terminal end of the input. A cross shaft is spaced apart from the terminal end of the input shaft and a second gear is securely mounted at the second end of the cross shaft with the second gear in direct mechanical communication with the first gear. A fifth gear with a hub is rotatably mounted on the input shaft. A third gear is securably mounted at the first end of the cross shaft with the third gear being in direct mechanical communication with the fifth gear. An output shaft terminates in a fourth gear with the fourth gear positioned opposite the fifth gear and in direct mechanical communication with the third gear.
    Type: Grant
    Filed: May 11, 1990
    Date of Patent: April 21, 1992
    Inventors: Jong O. Ra, Joon Y. Lim