Patents by Inventor Yuji Sakaguchi
Yuji Sakaguchi 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).
-
Publication number: 20240149326Abstract: A workpiece transport device is downsized. A workpiece transport device includes: a pair of upstream-side end shaft and downstream-side end shafts disposed apart from each other in a transport direction that is a direction of transport of a workpiece, an upstream-side drive shaft disposed between a pair of upstream-side end shaft and downstream-side end shafts in the transport direction, an upstream-side drive belt wound around the upstream-side drive shaft and the upstream-side end shaft, and a transport belt wound around the pair of upstream-side end shaft and downstream-side end shaft. Driving force for transporting the workpiece is transmitted to the transport belt through the upstream-side drive shaft, the upstream-side drive belt, and the upstream-side end shaft in this order.Type: ApplicationFiled: January 27, 2022Publication date: May 9, 2024Applicant: KOMATSU INDUSTRIES CORPORATIONInventors: Hidetoshi AKASHI, Shigenori SANO, Yuji SAKAGUCHI
-
Patent number: 5052273Abstract: A pneumatic actuator includes a tubular body made of a rubber-like elastic material and a braided structure made of organic or inorganic high-tensile-strength fibers reinforcing an outside of the tubular body. Closure members sealingly close ends of the tubular body; at least one of the closure members has a fluid connecting passage. The tubular body deforms to expand its diameter when pressurized fluid is introduced through the connecting passage to cause contractive force in the longitudinal direction. Contraction-detecting strain gauges at one closure member provide signals corresponding to the contractive force of the actuator.Type: GrantFiled: June 1, 1989Date of Patent: October 1, 1991Assignee: Bridgestone CorporationInventor: Yuji Sakaguchi
-
Patent number: 4860639Abstract: A pneumatic actuator includes a tubular body made of a rubber-like elastic material and a braided structure made of organic or inorganic high-tensile-strength fibers reinforcing an outside of the tubular body. Closure members sealingly close ends of the tubular body; at least one of the closure members has a fluid connecting passage. The tubular body deforms to expand its diameter when pressurized fluid is introduced through the connecting passage to cause contractive force in the longitudinal direction. Contraction-detecting strain gauges at one closure member provide signals corresponding to the contractive force of the actuator.Type: GrantFiled: April 4, 1988Date of Patent: August 29, 1989Assignee: Bridgestone CorporationInventor: Yuji Sakaguchi
-
Patent number: 4782860Abstract: A magnet for control valve includes a housing having an inlet and an outlet for a pressurized fluid, a valve seat member having a conical inner surface valve seat, a spherical valve body adapted to be in line contact with the valve seat, a throttle adjusting plate made of a magnetic material shiftable toward and away from the valve seat, and an electromagnet for attracting and releasing the throttle adjusting plate to shift the valve body toward and away from the valve seat. According to the invention a sheet, preferably made of urethane foam is arranged on a side of the throttle adjusting plate opposite to the valve body, thereby eliminating noise caused by self-oscillation of the valve body and throttle adjusting plate, while maintaining high responsibility as a magnetic control valve.Type: GrantFiled: September 23, 1987Date of Patent: November 8, 1988Assignee: Bridgestion CorporationInventors: Yuji Sakaguchi, Takeo Takagi, Yoshinori Imamura
-
Patent number: 4771983Abstract: A magnet for control valve includes a housing having an inlet and an outlet for a pressurized fluid, a valve seat member having a conical inner surface valve seat, a spherical valve body adapted to be in line contact with the valve seat, a throttle adjusting plate made of a magnetic material shiftable toward and away from the valve seat, and an electromagnet for attracting and releasing the throttle adjusting plate to shift the valve body toward and away from the valve seat. According to the invention, a sheet, preferably made of urethane foam is arranged on a side of the throttle adjusting plate opposite to the valve body, thereby eliminating noise caused by self-oscillation of the valve body and throttle adjusting plate, while maintaining high responsibility as a magnet control valve.Type: GrantFiled: March 10, 1987Date of Patent: September 20, 1988Assignee: Bridgestone CorporationInventors: Yuji Sakaguchi, Takeo Takagi, Yoshinori Imamura
-
Patent number: 4689538Abstract: A driving device having tactility includes at least one set of two elastic extensible and contractible bodies having one ends connected to a stationary portion of the device and the other ends connected to a driven member driven by contractive force in axial directions of said elastic bodies caused by expanded diameters by introducing pressurized fluid into the elastic bodies. The driving device comprises detecting means for detecting movements of said driven member, valve means for supplying and exhausting the pressurized fluid into and out of the respective elastic bodies, positioning means for actuating the valve means in response to output signals from the detecting means to position the driven member in predetermined positions, and control means for comparing output signals from the detecting means produced by external actions on the driven member positioned in at least one predetermined position with a reference level to control the positioning means.Type: GrantFiled: September 11, 1986Date of Patent: August 25, 1987Assignee: Bridgestone CorporationInventors: Yuji Sakaguchi, Tatuo Terahama
-
Patent number: 4664232Abstract: A brake device for use in an arm of a robot or manipulator cmprises a brake drum, a lever pivotally supported at its intermediate portion, a brake shoe provided on the lever between its pivotally supported point and its one end, a pneumatic actuator axially contractible upon applying internal pressure thereinto and having a movable end connected to the one end or the other end of the lever, and a spring connected to one end of the lever not connected to the actuator so as to operate to elongate the actuator. This brake device is remarkably small-sized and of light-weight and consumes only small amount of fluid pressure to contribute economy of energy in comparison with prior art brake devices.Type: GrantFiled: February 27, 1985Date of Patent: May 12, 1987Assignee: Bridgestone CorporationInventors: Takeo Takagi, Yuji Sakaguchi, Yoshinori Imamura
-
Patent number: 4615260Abstract: A pneumatic actuator includes an elastic tubular body, closure members sealingly closing its ends and a braided structure made of braided cords reinforcing the tubular body. The braided structure is expanded in its radial direction and simultaneously contracted in its axial direction together with the tubular body when pressurized fluid is supplied into the tubular body. According to the invention the braided cords of the braided structure comprises monofilaments each having a smoothly rounded outer surface of a large radius of curvature. A protective layer may be provided between the tubular body and the braided structure or a filler such as an incompressible fluid substance having no constant shape is provided in the tubular body, or diameters of both ends of the braided structure and braided angles at both the ends are made larger than those at a substantially mid portion of the braided structure.Type: GrantFiled: April 25, 1984Date of Patent: October 7, 1986Assignee: Bridgestone CorporationInventors: Takeo Takagi, Yuji Sakaguchi
-
Patent number: 4401325Abstract: A flexible pipe coupling is disclosed. This coupling comprises a large diameter cylindrical hollow body, a pair of small diameter cylindrical hollow bodies each having one end portion disposed inside each end of the large diameter cylindrical hollow body on the same axial line, and an elastic sleeve member for connecting each end of the large diameter cylindrical hollow body to one end of each of the small diameter cylindrical hollow bodies. The elastic sleeve member is provided at its both ends adjacent to the cylindrical hollow bodies with protrusions each extending outwardly in the widthwise direction of the sleeve member at a radius of curvature corresponding to 0.1.about.0.4 times the thickness of the sleeve member, whereby the durability of the coupling is further improved.Type: GrantFiled: April 8, 1981Date of Patent: August 30, 1983Assignee: Bridgestone Tire Co., Ltd.Inventors: Kazuo Tsuchiya, Hirotsugu Masuda, Yuji Sakaguchi