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公开(公告)号：JPH11287240A
公开(公告)日：1999-10-19
申请号：JP35019998
申请日：1998-12-09
Applicant: IBM
Inventor： LEE CHEN-HSIUNG , NAGARAJ HOLAVANAHALLY SESHACHA , SHIRLE NEAL BERTRAM
Abstract: PROBLEM TO BE SOLVED: To provide an axial bearing supporting structure by which the oil leakage can be prevented, the maintainability of a bearing under the impact can be kept, the evaporation of the oil can be reduced, and the deformation of the active bearing face can be minimized. SOLUTION: A dynamic fluid bearing comprises a thrust plate connected with a shaft, a bearing plate 214 connected with a sleeve, and a load plate 240, the load plate pushes the bearing plate toward the thrust plate, and an adhesive 250 composed of UV epoxy is applied between the load plate and the thrust plate. The sleeve is connected with a stator for the operation, and the stator rotates the sleeve when receiving a driving signal. Further a diffusion barrier 260 is mounted between the sleeve 230 and the stator, and a second diffusion barrier 270 is mounted between the load plate and the shaft. The bearing optionally includes an O-ring 222.
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公开(公告)号：CA1098161A
公开(公告)日：1981-03-24
申请号：CA305225
申请日：1978-06-12
Applicant: IBM
Inventor： GIORDANO FRANCIS P , KUHN LAWRENCE , LANE RAMON , LEE CHEN-HSIUNG , ZIERDT GENE O
Abstract: INK JET PRINTING HEAD An ink jet printing head comprising a head body made from a material having high specific stiffness and the head body includes an ink passage which is kept small to retain the high body stiffness. The ink passage comprises a narrow slot connected with internal holes in the body which lead to ink inlet and exit ports. A nozzle plate having a plurality of orifices is fixed to the front of the head body and a piezoelectric crystal is fixed to the back of the head body. The piezoelectric crystal is kept thin compared to the head thickness, typically on the order of 1/20 to 1/30 of the body thickness, so that the effect of the crystal on the resonant characteristics of the assembly is kept small. The ink jet head provides a plurality of columns or jets of ink which are excited in such a way as to break up into uniformly and equally spaced drops at a fixed distance from the nozzle plate containing the orifices which produce the jets.
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公开(公告)号：CA974569A
公开(公告)日：1975-09-16
申请号：CA167870
申请日：1973-03-30
Applicant: IBM
Inventor： LEE CHEN-HSIUNG , LOMINAC HAROLD R , ROSS CHARLES O , WOLFE BRUCE A
Abstract: 1403276 Printers INTERNATIONAL BUSINESS MACHINES CORP 12 Feb 1973 [6 April 1972] 6757/73 Heading G4H [Also in Division B6] An ink droplet printer comprises droplet generation means 25, droplet deflection means 32, 33 and droplet charging means in the form of a plurality of charging elements 35 spaced along the path of travel of a droplet, selection of a charging element governing the position at which the droplet strikes a record medium 27. The charging elements 35 are supplied from a constant voltage source V 1 under control of shift registers 40-42 responsive to data input lines 43-45 and single shots 49-51 controlling phase synchronism. A phase maintenance system 47 responsive to a drop formation oscillator 29, drop charging pulses and phase sample pulses, for example one for each line printed, includes a logic box (54, Fig. 3, not shown) and controls the single shots 49-51.
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公开(公告)号：SG77700A1
公开(公告)日：2001-01-16
申请号：SG1999003662
申请日：1999-07-29
Applicant: IBM
Inventor： LEE CHEN-HSIUNG
Abstract: The method for determining the sufficiency of fluid in a hydrodynamic fluid bearing motor involves making a first determination of a range of fluid bearing fly-heights for motors having a sufficient quantity of fluid within the hydrodynamic fluid bearing, and for motors having an insufficient quantity of fluid within the hydrodynamic fluid bearing. Thereafter, the fly-height of a particular hydrodynamic fluid bearing motors can be determined and compared with the range of hydrodynamic fluid bearing fly-heights to provide a determination of the sufficiency of fluid within the particular hydrodynamic fluid bearing motor. Determining the fly-height of a particular hydrodynamic fluid bearing motor involves the utilization of non-contact displacement probes that generate a first signal indicative of the displacement of a rotating component of the bearing at a time when the component is rotating at a maximum fly-height. The probes then generate a second signal indicative of the displacement of the rotating component at a time when said component has ceased its flying within the hydrodynamic bearing. The difference between the first and second signals is an indication of the fly-height of said hydrodynamic fluid bearing of said particular motor.
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公开(公告)号：DE2313916A1
公开(公告)日：1973-10-18
申请号：DE2313916
申请日：1973-03-21
Applicant: IBM
Inventor： LEE CHEN-HSIUNG , LOMINAC HAROLD RICHMOND , ROSS CHARLES OWEN , WOLFE BRUCE ALLEN
Abstract: 1403276 Printers INTERNATIONAL BUSINESS MACHINES CORP 12 Feb 1973 [6 April 1972] 6757/73 Heading G4H [Also in Division B6] An ink droplet printer comprises droplet generation means 25, droplet deflection means 32, 33 and droplet charging means in the form of a plurality of charging elements 35 spaced along the path of travel of a droplet, selection of a charging element governing the position at which the droplet strikes a record medium 27. The charging elements 35 are supplied from a constant voltage source V 1 under control of shift registers 40-42 responsive to data input lines 43-45 and single shots 49-51 controlling phase synchronism. A phase maintenance system 47 responsive to a drop formation oscillator 29, drop charging pulses and phase sample pulses, for example one for each line printed, includes a logic box (54, Fig. 3, not shown) and controls the single shots 49-51.
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Patent Agency Ranking
公开(公告)号：SG70136A1
公开(公告)日：2000-01-25
申请号：SG1998004927
申请日：1998-11-23
Applicant: IBM
Inventor： LEE CHEN-HSIUNG , SHIRLE NEAL BERTRAM , NAGARAJ HOLAVANAHALLY SESHACHA
IPC: F16C17/04 , F16C33/10 , F16C33/74 , G11B19/20 , G11B25/04 , H02K5/124 , H02K5/16 , H02K7/08 , G11B33/14
Abstract: A dynamic fluid bearing for a spindle motor is disclosed, which provides a fluid bearing seal and support structure that simultaneously addresses the problems of preventing oil leakage, of maintaining the bearing integrity under shock, of reducing oil evaporation and of minimizing distortion of the active bearing surface. The bearing structure includes a thrust plate coupled to a shaft 480 and a bearing plate 214 and load plate 240 coupled to a sleeve 430, wherein the load plate urges the bearing plate towards the thrust plate, and wherein an adhesive 250 is interposed between the load plate and the thrust plate. The adhesive may be an UV epoxy. The sleeve is operatively coupled to a stator 494, 498, and the stator rotates the sleeve upon receiving a drive signal. The bearing further includes a diffusion barrier 270 disposed between the sleeve and the stator. A second diffusion barrier 260 is disposed between the load plate and the shaft. The bearing structure may also include an O-ring 222 disposed above the bearing plate for sealing a gap between the bearing plate and the sleeve.
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公开(公告)号：DE2842755A1
公开(公告)日：1979-04-12
申请号：DE2842755
申请日：1978-09-30
Applicant: IBM
Inventor： GIORDANO FRANCIS PETER , KUHN LAWRENCE , LANE RAMON , LEE CHEN-HSIUNG , ZIERDT GENE OVERHOLTS , SAN JOSE CALIF
Abstract: An ink jet printing head comprising a head body made from a material having high specific stiffness and the head body includes an ink passage which is kept small to retain the high body stiffness. The ink passage comprises a narrow slot connected with internal holes in the body which lead to ink inlet and exit ports. A nozzle plate having a plurality of orifices is fixed to the front of the head body and a piezoelectric crystal is fixed to the back of the head body. The piezoelectric crystal is kept thin compared to the head thickness, typically on the order of 1/20 to 1/30 of the body thickness, so that the effect of the crystal on the resonant characteristics of the assembly is kept small. The ink jet head provides a plurality of columns or jets of ink which are excited in such a way as to break up into uniformly and equally spaced drops at a fixed distance from the nozzle plate containing the orifices which produce the jets.
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公开(公告)号：FR2312377A1
公开(公告)日：1976-12-24
申请号：FR7610168
申请日：1976-04-01
Applicant: IBM
Inventor： LEE CHEN-HSIUNG
Abstract: A pressurized fluid issuing from a nozzle orifice to form a jet stream is perturbated by a hybrid velocity and pressure modulation to form a stream of drops. A perturbation means, such as a piezoelectric crystal, is mounted both to vibrate the nozzle for modulating the stream velocity and to perturbate the interior volume of a fluid cavity communicating with the nozzle for also modulating the pressure of the fluid.
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公开(公告)号：CA1068325A
公开(公告)日：1979-12-18
申请号：CA253486
申请日：1976-05-27
Applicant: IBM
Inventor： LEE CHEN-HSIUNG
Abstract: A pressurized fluid issuing from a nozzle orifice to form a jet stream is perturbated by a hybrid velocity and pressure modulation to form a stream of drops. A perturbation means, such as a piezoelectric crystal, is mounted both to vibrate the nozzle for modulating the stream velocity and to perturbate the interior volume of a fluid cavity communicating with the nozzle for also modulating the pressure of the fluid.
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公开(公告)号：FR2404530A1
公开(公告)日：1979-04-27
申请号：FR7824962
申请日：1978-08-21
Applicant: IBM
Inventor： GIORDANO FRANCIS P , KUHN LAWRENCE , LANE RAMON , LEE CHEN-HSIUNG , ZIERDT GENE O
Abstract: An ink jet printing head comprising a head body made from a material having high specific stiffness and the head body includes an ink passage which is kept small to retain the high body stiffness. The ink passage comprises a narrow slot connected with internal holes in the body which lead to ink inlet and exit ports. A nozzle plate having a plurality of orifices is fixed to the front of the head body and a piezoelectric crystal is fixed to the back of the head body. The piezoelectric crystal is kept thin compared to the head thickness, typically on the order of 1/20 to 1/30 of the body thickness, so that the effect of the crystal on the resonant characteristics of the assembly is kept small. The ink jet head provides a plurality of columns or jets of ink which are excited in such a way as to break up into uniformly and equally spaced drops at a fixed distance from the nozzle plate containing the orifices which produce the jets.
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