Patents by Inventor Nai Hock Lwee
Nai Hock Lwee 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).
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Patent number: 5830014Abstract: The present invention provides a vertical card connector capable of preventing an undesirable flow of melted solder which destroys proper contacts and of removing a corrosion-causing acid gas. The vertical card connector includes an insulating housing with a plurality of contact terminals and a heat-resisting insulating resin film covering the bottom surface of the housing. The solder tail of the contact is inserted into a corresponding plated through hole and soldered there. The film prevents melted solder from flowing past the solder tail toward a contact beam of the contact at the time of soldering. Gas produced from the solder escapes through the gap between the circuit board and the bottom of the housing.Type: GrantFiled: October 28, 1996Date of Patent: November 3, 1998Assignee: Berg Technology, Inc.Inventors: Nai Hock Lwee, Loke Wing Kin, Ng Bee Suat
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Patent number: 5823799Abstract: A single-sided, straddle mount printed circuit board edge connector positively mechanically locks the connector to the circuit board using a plurality of gripper arm assemblies spaced along the connector housing. The gripper arm assemblies each include an upper and lower gripper arm defining therebetween a printed circuit board receiving space. The gripper arm assemblies positively mechanically lock the printed circuit board to the connector without the use of through holes and screws. The connector overcomes the disadvantages of connector tilt problems, manufacturability and provides for simplicity in assembling the connector and printed circuit board.Type: GrantFiled: October 23, 1996Date of Patent: October 20, 1998Assignee: Thomas & Betts CorporationInventors: Peng-Seng Tor, Joey Ng Kiat-Hup, Nai-Hock Lwee
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Patent number: 5685726Abstract: A card connector according to the current invention provides a substantially low profile when it is placed on the board. Stoppers and solder tails are situated at the bottom of the housing of the card connector and extend in the perpendicular direction with respect to the housing. In one embodiment, the connector housing is inserted into a mount opening of a circuit board from a rear side of the circuit board. A portion of the housing may be positioned above the front surface of the circuit board while stoppers and solder tails are positioned on the rear surface of the circuit board. Since the solder tails are soldered to the circuit board, it is possible to reduce the height of the connector housing that extends over the front surface of the circuit board.Type: GrantFiled: July 27, 1995Date of Patent: November 11, 1997Assignee: Berg Technology, Inc.Inventors: Nai Hock Lwee, Niranjan Kumar Mitra
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Patent number: 5413497Abstract: An electrical connector has an insulating housing with contact terminals which extend therethrough. The contact terminals are provided to electrically connect a mother board to a daughter board. A board-receiving opening is provided in the housing for reception of the daughter board therein. A pair of latch members are provided on the housing for latching the daughter board to take a predetermined posture with respect to the mother board. A pair of restricting metal plates are mounted on the housing for restricting the latch members from being flexed in a direction to move the paired latch members away from each other. A spring is provided in the board-receiving opening for enabling a spring force to be applied to the daughter board in a direction to urge the daughter board into the predetermined posture against a push force by the daughter board received in the board-receiving opening.Type: GrantFiled: December 9, 1992Date of Patent: May 9, 1995Inventor: Nai Hock Lwee
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Patent number: 5401176Abstract: A connector device comprises a housing having an internal storage space for inserting one or more storage devices therein. A shallow guide member is coupled along one of the inner side walls of the housing to define upper and lower storage spaces within the housing without substantially interrupting the overall storage space of the housing. A connector section coupled to one end of the housing has upper and lower contact arrays disposed respectively in the upper and lower storage spaces. At least one of the contact arrays is adapted to interchangeably connect to either a memory card or a hard disk drive package. A single hard disk drive package may be connected to the connect device, thereby occupying the entire storage space of the house, or alternatively, a memory card may be inserted into each of the upper and lower storage spaces. The connector device may further comprise upper and lower ejection mechanisms for ejecting storage devices from the respective storage spaces.Type: GrantFiled: March 17, 1994Date of Patent: March 28, 1995Assignee: Berg Technology, Inc.Inventor: Nai Hock Lwee
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Patent number: 5324204Abstract: A connector device comprises a housing having an internal storage space for inserting one or more storage devices therein. A shallow guide member is coupled along one of the inner side walls of the housing to define upper and lower storage spaces within the housing without substantially interrupting the overall storage space of the housing. A connector section coupled to one end of the housing has upper and lower contact arrays disposed respectively in the upper and lower storage spaces. At least one of the contact arrays is adapted to interchangeably connect to either a memory card or a hard disk drive package. A single hard disk drive package may be connected to the connect device, thereby occupying the entire storage space of the house, or alternatively, a memory card may be inserted into each of the upper and lower storage spaces. The connector device may further comprise upper and lower ejection mechanisms for ejecting storage devices from the respective storage spaces.Type: GrantFiled: September 10, 1992Date of Patent: June 28, 1994Inventor: Nai Hock Lwee
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Patent number: 5320540Abstract: A connector apparatus has a housing and a container inserted into, and withdrawn from, the housing. The memory card is stored in a storage space of the container. With the container fully inserted into the housing with no memory card placed therein, the insertion inlet of the housing is closed by the front wall of the container, preventing the intrusion of the foreign small particles and dirt into the housing.Type: GrantFiled: October 15, 1992Date of Patent: June 14, 1994Assignee: E. I. Du Pont de NemoursInventor: Nai Hock Lwee
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Patent number: 5299089Abstract: A connector device comprises a housing and a connector body coupled to one end of the housing. One hard disk drive package is inserted in the inner space of the housing which is constituted by first and second decks. When the hard disc drive package is not inserted in the inner space of the housing, two memory cards are inserted in the first and second decks, respectively.Type: GrantFiled: October 27, 1992Date of Patent: March 29, 1994Assignee: E. I. DuPont de Nemours & Co.Inventor: Nai Hock Lwee
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Patent number: 5282751Abstract: A connector apparatus having a reduced total packaging height despite the presence of mounting receptacle connectors on each the surfaces of a mount board is disclosed. The mount board is formed from a flexible printed circuit bonded to a support plate. The mount board is bent in a stepped or offset relation to an axis extending perpendicular to the surface of the board mount to provide a pair of opposed step sections, lower and upper. A receptacle connector is mounted to the upper and to the lower step section of the mount board; that is, to the side of the board mount having the flexible printed circuit board side and one to the side of the board mount having the support plate. The upper and lower receptacles extend in mutually opposed directions along the axis.Type: GrantFiled: July 31, 1992Date of Patent: February 1, 1994Inventor: Nai Hock Lwee
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Patent number: 5257941Abstract: A relatively compact profile hard disc drive package is disclosed in which an clean room zone internal to the drive casing may be sealed despite the presence of a linking connector extending from the package. A cutout is provided in the casing and a connector body is fitted into the cutout so that the connector does not project beyond the surface of the casing. The connector has pins that are mated to a receptacle connector located within the casing and other pins that are mated to a receptacle connector on the exterior of the casing. The cutout is sealed by a sealant that is received between projections extending from the body of the connector.Type: GrantFiled: August 14, 1992Date of Patent: November 2, 1993Assignee: E. I. Du Pont de Nemours and CompanyInventors: Nai Hock Lwee, Meng K. Kan
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Patent number: 5106313Abstract: A header device comprises; a housing attached to an end face of a printed circuit board having through-holes; and a plurality of pins extending through and sealed to a first section of the housing, the first section facing the end face of the printed circuit board. The plurality of pins are arranged as an upper/lower array in a two-level structure at one surface of the first section of the housing; the pins of at least one of the two levels are bent within the first section and the pins of the respective level extend in the same plane out of the other surface of the first section of the housing; and the pins of the respective level, which extend in the same plane, are substantially vertically bent so as to insert forward portions of the pins into the through-holes of the printed circuit board.Type: GrantFiled: August 1, 1991Date of Patent: April 21, 1992Assignee: E. I. Du Pont de Nemours and CompanyInventors: Nai Hock Lwee, Meng Kuang Kan
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Patent number: 5096428Abstract: A header device comprises; a housing attached to an end face of a printed circuit board having through-holes; and a plurality of pins extending through and sealed to a first section of the housing, the first section facing the end face of the printed circuit board. The plurality of pins are arranged as an upper/lower array in a two-level structure at one surface of the first section of the housing; the pins of at least one of the two levels are bent within the first section and the pins of the respective level extend in the same plane out of the other surface of the first section of the housing; and the pins of the respective level, which extend in the same plane, are substantially vertically bent so as to insert forward portions of the pins into the through-holes of the printed circuit board.Type: GrantFiled: August 20, 1991Date of Patent: March 17, 1992Assignee: E. I. Du Pont de Nemours and CompanyInventors: Nai Hock Lwee, Meng Kuang Kan