WO2024075747A1 - 送風装置 - Google Patents

送風装置 Download PDF

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Publication number
WO2024075747A1
WO2024075747A1 PCT/JP2023/036110 JP2023036110W WO2024075747A1 WO 2024075747 A1 WO2024075747 A1 WO 2024075747A1 JP 2023036110 W JP2023036110 W JP 2023036110W WO 2024075747 A1 WO2024075747 A1 WO 2024075747A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter
air filter
air
housing
protrusions
Prior art date
Application number
PCT/JP2023/036110
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
啓貴 前田
啓介 稲葉
Original Assignee
株式会社村田製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社村田製作所 filed Critical 株式会社村田製作所
Priority to JP2024555820A priority Critical patent/JPWO2024075747A1/ja
Publication of WO2024075747A1 publication Critical patent/WO2024075747A1/ja

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning

Definitions

  • the present invention relates to a technology that has an intake port and exhausts clean gas.
  • Patent Document 1 describes a flow generator equipped with a filter cartridge.
  • the filter cartridge includes a flat air filter and a grill member.
  • the grill member has multiple pillars with gaps (slits) between the multiple pillars.
  • the multiple pillars of the grill member abut against the air filter. With this structure, the grill member holds the air filter.
  • gas has difficulty passing through the air filter where the air filter and the multiple columns come into contact. This reduces the effective cross-sectional area of the filter, including the air filter, and reduces the filter function.
  • the object of the present invention is therefore to provide a structure that can hold an air filter without reducing the effective area of the filter.
  • the air blower comprises a housing having an intake port and an exhaust port, an air filter arranged in a position overlapping the intake port of the housing when viewed from the front, and a filter cover arranged in a position overlapping the air filter when viewed from the front and holding the air filter.
  • the filter cover comprises a number of pillars arranged at intervals. The pillars have protrusions that protrude towards the air filter. The filter cover is fixed to the housing with the protrusions abutting against the air filter and with the parts of the pillars other than the protrusions separated from the air filter.
  • the multiple pillars of the filter cover contact the air filter only at the protrusions. This creates a space between the multiple pillars and the air filter in places other than the protrusions, and air also flows through this space. In other words, even if the pillars and the air filter overlap in a front view in places other than the protrusions, air also flows through this part of the air filter (the part that overlaps the pillars in a front view), and it functions as a filter.
  • This invention allows the air filter to be held without reducing the effective area of the filter.
  • FIG. 1 is an external perspective view of a blower device according to an embodiment of the present invention.
  • FIG. 2(A) is a diagram of the blower device according to the embodiment of the present invention as viewed from the front side
  • FIG. 2(B) is a diagram of the blower device according to the embodiment of the present invention as viewed from the top side.
  • 3A and 3B are perspective views of the filter cover, where Fig. 3A is a view seen from the front side, and Fig. 3B is a view seen from the rear side.
  • FIG. 4(A) is a view of the filter cover from the front side
  • Figure 4(B) is a view of the filter cover from the back side
  • Figure 4(C) is a view of the filter cover from the top side
  • Figure 4(D) is a view of the filter cover from the bottom side.
  • FIG. 5 is a perspective view of an air intake port forming member that forms an air intake port of the housing.
  • FIG. 6(A) is a front view of the air filter
  • FIG. 6(B) is a side view of the air filter.
  • Figure 7 (A) is a cross-sectional view of an air filter holding structure having the configuration of this embodiment, viewed from above
  • Figure 7 (B) is a cross-sectional view of an air filter holding structure not having the configuration of this embodiment, viewed from above
  • Figures 8(A) and 8(B) are cross-sectional views of the air filter holding structure according to the configuration of this embodiment
  • Figure 8(C) is a cross-sectional view of the air filter holding structure according to the configuration of this embodiment (structure having multiple protrusions) when the air filter is clamped between multiple pillars.
  • Fig. 1 is an external perspective view of the blower device according to an embodiment of the present invention.
  • Fig. 2(A) is a view of the blower device according to an embodiment of the present invention as seen from the front side
  • Fig. 2(B) is a view of the blower device according to an embodiment of the present invention as seen from the top side.
  • front and top sides including the back and bottom sides, which will be described later
  • the blower device 10 includes a housing 20, a filter cover 30, and an air filter 40.
  • the housing 20 has a generally rectangular parallelepiped shape and includes a top wall 201, a bottom wall 202, a front wall 203, a rear wall 204, a side wall 205, and a side wall 206.
  • the top wall 201 and the bottom wall 202 face each other.
  • the front wall 203 and the rear wall 204 face each other.
  • the side wall 205 and the side wall 206 face each other.
  • the front wall 203, rear wall 204, side wall 205, and side wall 206 are connected to the periphery of the top wall 201 and bottom wall 202. This allows the housing 20 to have an internal space 200 surrounded by the front wall 203, rear wall 204, side wall 205, and side wall 206.
  • the front wall 203 has an intake port 281 and an exhaust port 291.
  • the intake port 281 and the exhaust port 291 penetrate the front wall 203 in the thickness direction.
  • the internal space 200 of the housing 20 is connected to the external space of the housing 20 by the intake port 281 and the exhaust port 291.
  • An exhaust path 290 is provided in the front wall 203.
  • the exhaust path 290 protrudes from the outer surface of the front wall 203.
  • the central opening of the exhaust path 290 is connected to an exhaust port 291 formed in the front wall 203, and this portion also functions as the exhaust port 291.
  • the air filter 40 is placed on the housing 20 in a position that overlaps the air intake 281 when viewed from the front.
  • the filter cover 30 is installed on the front wall 203 of the housing 20 at a position that overlaps the air intake 281 in which the air filter 40 is arranged when the air intake 281 is viewed from the front.
  • the filter cover 30 has slits formed by multiple pillars, and the multiple slits allow ventilation.
  • a blower is disposed inside the housing 20.
  • the blower is driven and stopped by operating the operation button 90 on the top wall 201 of the housing 20.
  • the blower draws gas from outside the housing 20 into the internal space 200 through the intake port 281, and exhausts it from the internal space 200 to the outside of the housing 20 through the exhaust port 291.
  • the intake gas passes through the filter cover 30 and the air filter 40, filtering out dust and other particles contained in the gas. Therefore, the blower 10 can exhaust gas of the desired cleanliness from the exhaust port 291.
  • Fig. 3(A) and Fig. 3(B) are perspective views of the filter cover.
  • Fig. 3(A) is a view from the front side
  • Fig. 3(B) is a view from the back side.
  • Fig. 4(A) is a view of the filter cover from the front side
  • Fig. 4(B) is a view of the filter cover from the back side
  • Fig. 4(C) is a view of the filter cover from the top side
  • Fig. 4(D) is a view of the filter cover from the bottom side.
  • the filter cover 30 includes a frame 31, a number of pillars 321-323, a number of slits 340 (openings), and a hinge portion 39.
  • the frame 31 has an oval shape when viewed from the front.
  • the shape of the frame 31 is not limited to this, and is determined according to the shape of a recess 2811 (see FIG. 5) that houses the air filter 40 and the filter cover 30 and is formed in the air intake 281 of the housing 20, which will be described later.
  • the multiple pillars 321-323 are arranged in a space surrounded by the frame 31. More specifically, the multiple pillars 321-323 are shaped to extend in the horizontal direction when the filter cover 30 is viewed from the front.
  • the horizontal direction is the direction parallel to the straight portion of the oval, and corresponds to the "first direction" of the present invention.
  • Pillar 321 is adjacent to the lower straight section of the frame body 31 with a gap therebetween
  • Pillar 322 is adjacent to pillar 321 with a gap therebetween
  • Pillar 323 is adjacent to pillar 322 with a gap therebetween, and is also adjacent to the upper straight section of the frame body 31 with a gap therebetween.
  • the distance between the lower straight portion of frame body 31 and pillar 321, the distance between pillar 321 and pillar 322, the distance between pillar 322 and pillar 323, and the distance between pillar 323 and the upper straight portion of frame body 31 are the same. Note that these distances do not have to be the same, but it is preferable that they are the same.
  • the pillar 321 has multiple protrusions 321P formed thereon.
  • the multiple protrusions 321P are shaped to partially protrude from the back surface of the pillar 321.
  • the multiple protrusions 321P are formed at intervals PP in the direction in which the pillar 321 extends.
  • the spacing PP between the multiple protrusions 321P is set so that the multiple protrusions 321P are equally spaced between the two ends, with the longest part in the horizontal direction at the opening of the frame body 31 at both ends.
  • the pillar 323 has multiple protrusions 323P formed thereon.
  • the multiple protrusions 323P are shaped to partially protrude from the back surface of the pillar 323.
  • the multiple protrusions 323P are formed at intervals PP in the direction in which the pillar 323 extends.
  • the spacing PP between the multiple protrusions 323P is set so that the multiple protrusions 323P are equally spaced between the two ends, with the longest part in the horizontal direction at the opening of the frame body 31 at both ends.
  • the spacing PP between the multiple protrusions 321P and the spacing PP between the multiple protrusions 323P are the same. However, they may differ depending on the positions of the pillars 321 and 323 within the opening of the frame body 31.
  • Handle portion 322H is formed on pillar 322. Handle portion 322H is shaped to protrude toward the front surface side beyond the central axis of pillar 322. The back surface of handle portion 322H is recessed. Note that handle portion 322H can be omitted.
  • the hinge portion 39 is formed at one lateral end of the frame body 31.
  • the hinge portion 39 is shaped to protrude from one lateral end of the frame body 31.
  • the hinge portion 39 is provided with a member that allows the filter cover 30 to rotate relative to the housing 20.
  • FIG. 5 is a perspective view of an air intake port forming member that forms an air intake port of the housing.
  • air intake port forming member 280 includes a cylinder 2801 and a wall forming member 2802.
  • Wall forming member 2802 is connected to one open end of cylinder 2801. This wall forming member 2802 constitutes a part of front wall 203 of housing 20.
  • the wall forming member 2802 has a recess 2811, which communicates with a through hole 2812 in the cylindrical body 2801.
  • the recess 2811 and the through hole 2812 form the intake port 281.
  • An oval pedestal 283 is formed in the recess 2811.
  • the shape of the pedestal 283 when viewed from the front is approximately the same as the outer shape of the air filter 40 and the outer shape of the frame body 31.
  • the space inside the base 283 has multiple housing side columns 2821-2823 formed in it.
  • the multiple housing side columns 2821-2823 extend horizontally when the wall forming member 2802 is viewed from the front.
  • the horizontal direction is the direction parallel to the straight portion of the ellipse of the base 283.
  • the multiple housing side columns 2821-2823 are arranged at intervals in the vertical direction when the wall surface forming member 2802 is viewed from the front.
  • Housing side column 2821 is adjacent to the lower straight section of the base 283 with a gap therebetween
  • housing side column 2822 is adjacent to housing side column 2821 with a gap therebetween
  • Housing side column 2823 is adjacent to housing side column 2822 with a gap therebetween, and is also adjacent to the upper straight section of the base 283 with a gap therebetween.
  • the distance between the lower straight portion of the base 283 and the housing side column 2821, the distance between the housing side column 2821 and the housing side column 2822, the distance between the housing side column 2822 and the housing side column 2823, and the distance between the housing side column 2823 and the upper straight portion of the base 283 are the same.
  • the distance between the lower straight section of the base 283 and the housing side column 2821 is the same as the distance between the lower straight section of the frame body 31 and column 321, and the distance between the housing side column 2821 and the housing side column 2822 is the same as the distance between column 321 and column 322.
  • the distance between the housing side column 2822 and the housing side column 2823 is the same as the distance between column 322 and column 323, and the distance between the housing side column 2823 and the upper straight section of the base 283 is the same as the distance between column 323 and the upper straight section of the frame body 31.
  • the housing side column 2821 has a plurality of housing side protrusions 2821P formed thereon.
  • the housing side protrusions 2821P are shaped to partially protrude from the front surface of the housing side column 2821.
  • the housing side protrusions 2821P are formed at intervals in the direction in which the housing side column 2821 extends.
  • the spacing between the multiple housing side protrusions 2821P is set so that the multiple housing side protrusions 2821P are equally spaced between both ends, with the longest part in the horizontal direction at the opening of the base 283 at both ends.
  • the spacing between the multiple housing side protrusions 2821P is the same as the spacing PP between the multiple protrusions 321P of the filter cover 30.
  • the housing side column 2822 has a plurality of housing side protrusions 2822P formed thereon.
  • the housing side protrusions 2822P are shaped to partially protrude from the front surface of the housing side column 2822.
  • the housing side protrusions 2822P are formed at intervals in the direction in which the housing side column 2822 extends. Note that in a configuration using a filter cover 30 having the above-described configuration, the housing side protrusions 2822P may be omitted.
  • the housing side column 2823 has a plurality of housing side protrusions 2823P formed thereon.
  • the housing side protrusions 2823P are shaped to partially protrude from the front surface of the housing side column 2823.
  • the housing side protrusions 2823P are formed at intervals in the direction in which the housing side column 2823 extends.
  • the spacing between the multiple housing side protrusions 2823P is set so that the multiple housing side protrusions 2823P are equally spaced between both ends, with the longest part in the horizontal direction at the opening of the base 283 at both ends.
  • the spacing between the multiple housing side protrusions 2823P is the same as the spacing PP between the multiple protrusions 323P of the filter cover 30.
  • the recess 284 is shaped to accommodate the hinge portion 39 of the filter cover 30.
  • FIG. 6(A) is a front view of the air filter
  • FIG. 6(B) is a side view of the air filter.
  • air filter 40 has main surface 401 and main surface 402, and is elliptical when viewed from the front.
  • the shape of air filter 40 when viewed from the front may be determined based on the shape of the installation position of air filter 40 in intake port 281.
  • the air filter 40 is a fiber filter made of, for example, nonwoven fabric, and has a porous structure. Therefore, the air filter 40 has a certain degree of elasticity.
  • the air filter 40 is made of at least one of the following materials. - Nonwoven fabrics (polyester, polypropylene, polyethylene, rayon, nylon, wool, cotton, glass fiber) ⁇ Sponge type (urethane filter) Felt-Based Air filter 40 has a thickness D40s in a state where no external force is applied to press main surface 401 and main surface 402 together.
  • Figure 7 (A) is a cross-sectional view of an air filter holding structure having the configuration of this embodiment, viewed from above
  • Figure 7 (B) is a cross-sectional view of an air filter holding structure not having the configuration of this embodiment, viewed from above.
  • Figures 8(A) and 8(B) are cross-sectional views of the air filter holding structure according to the configuration of this embodiment, as viewed from the side
  • Figure 8(C) is a cross-sectional view of the air filter holding structure when the air filter is sandwiched between multiple pillars without the configuration of this embodiment (a structure having multiple protrusions).
  • the air filter 40 is housed in the recess 2811 of the air intake forming member 280 of the housing 20. At this time, the periphery of the air filter 40 abuts against the base 283.
  • the filter cover 30 is accommodated and fixed in the recess 2811 of the air intake forming member 280 of the housing 20. At this time, the filter cover 30 is fixed to the recess 2811 by the hinge portion 39 being rotatably fixed to the recess 284.
  • the air filter 40 is placed between the filter cover 30 and the air intake forming member 280 (base 283). At this time, the air filter 40 is sandwiched between the frame 31 of the filter cover 30 and the base 283. This holds the periphery of the air filter 40 in place.
  • the thickness D40pu of the air filter 40 becomes smaller than the thickness (maximum thickness) D40s when no external force is applied.
  • a plurality of protrusions 321P abut against the main surface 401 of the air filter 40 (similarly to the plurality of protrusions 323P).
  • a plurality of housing side protrusions 2821P abut against the main surface 402 of the air filter 40 (similarly to the plurality of housing side protrusions 2823P).
  • the protrusion 321P and the housing side protrusion 2821P overlap when the air intake 281 is viewed from the front. Therefore, the air filter 40 is sandwiched between the protrusion 321P and the housing side protrusion 2821P.
  • the thickness D40p0 of the air filter 40 in this sandwiched portion is the distance between the tip surface of the protrusion 321P and the tip surface of the housing side protrusion 2821P.
  • the thickness D40p0 of the air filter 40 at the clamped portion becomes smaller than the thickness D40s when no external force is applied.
  • the air filter 40 has elasticity, the non-clamped portions do not become thinner than the clamped portions, and have a maximum thickness D40pf of the non-contact portion, as shown in FIG. 7A, for example.
  • the portions of the air filter 40 that are not clamped between the protrusions 321P and the housing side protrusions 2821P do not come into contact with the intake port forming member 280 and the pillars 321 of the filter cover 30 (the same applies to the pillars 322, 323 of the filter cover 30).
  • the filter function-reduced portion ZnNF is limited to the portion sandwiched between the protrusion on the air filter 40 and the protrusion on the housing side. Therefore, the air blower 10 can reduce the filter function-reduced portion ZnNF and increase the effective area of the filter.
  • the air blower 10 can achieve excellent filtering functions while compressing and holding the air filter 40 in the thickness direction.
  • the air blower 10 can achieve excellent filtering functions while keeping the shape of the installation location of the air filter 40 thin (small).
  • the blower device 10 can form a space 390 between the air filter 40 and the multiple pillars 321-323 (upstream side of the air filter 40), which extends except for the multiple protrusions.
  • the blower 10 can temporarily store dust and other particles that have passed through the filter cover 30 in the space 390 before they enter the air filter 40.
  • the blower 10 can filter the gas containing dust and the like temporarily trapped in the space 390 even at the points where the air filter 40 overlaps with the pillars 321-323, excluding the protrusions 321P and 323P. This allows the blower 10 to achieve an even more excellent filtering function.
  • the filter function reduced portion ZnNF becomes large.
  • the effective area of the filter becomes small, and the filter function is reduced.
  • the air filter 40 in a structure in which the air filter 40 is sandwiched between multiple pillars 321-323 and multiple housing side pillars 2821-2823, the air filter 40 is in contact with the entirety of the multiple pillars 321-323 and multiple housing side pillars 2821-2823. Therefore, in a structure such as that shown in FIG. 8(B), the filter function reduction portion ZnNF becomes large. As a result, in the structure shown in FIG. 8(B), the effective area of the filter becomes smaller, and the filter function is reduced.
  • the air blower 10 can achieve excellent filtering function while keeping the shape of the installation location of the air filter 40 thin (small), which is not possible in the comparative example.
  • blower device 10 multiple protrusions and multiple housing-side protrusions are arranged at equal intervals in the width direction in which the gas is drawn in (the longitudinal direction when the air intake port 281 is viewed from the front). This reduces variation in the gas flow in the longitudinal direction when the air intake port 281 is viewed from the front. Therefore, the blower device 10 can achieve a more efficient filter effect with less variation in the longitudinal direction.
  • a filter cover 30 having multiple horizontally elongated slits has been described as an example.
  • the shape of the filter cover 30 is not limited to this, and it may be, for example, a lattice shape, a shape with multiple openings, etc.
  • blower device 10 a configuration was shown in which protrusions are provided on both the filter cover 30 and the air intake forming member 280.
  • the blower device 10 it is sufficient for the blower device 10 to have a protrusion on at least the filter cover 30.
  • the protrusion on the air intake forming member 280 can be omitted.
  • the blower device 10 shown in this embodiment is used, for example, as a CPAP device (a device used for nasal continuous positive airway pressure therapy).
  • CPAP device a device used for nasal continuous positive airway pressure therapy.
  • the blower device 10 shown in this embodiment can be made more compact. This is effective in making the CPAP device easier to carry around.
  • blower device 10 is not limited to CPAP devices, and can be used with any device that draws in gas from the atmosphere, etc., and exhausts gas of a desired cleanliness.
  • the filter cover 30 is configured by arranging multiple pillars at intervals to form an air flow path.
  • the filter cover 30 may also be a plate or the like with multiple holes formed therein that form the air flow path, in which case the parts of the plate without multiple holes correspond to the pillars of the present invention.
  • a housing having an intake port and an exhaust port; an air filter disposed at a position overlapping the air intake of the housing when the air intake is viewed from the front; a filter cover that is disposed in a position overlapping with the air filter when the air intake port is viewed from the front and that holds the air filter; Equipped with The filter cover includes a plurality of spaced apart posts; The pillar has a protrusion that protrudes toward the air filter, The filter cover is fixed to the housing with the protrusion abutting against the air filter and portions of the pillars other than the protrusion being spaced apart from the air filter.
  • ⁇ 2> The air blower of ⁇ 1>, in which the maximum thickness of the air filter when the filter cover is in contact is smaller than the maximum thickness when the filter cover is not in contact.
  • the pillar has a plurality of the protrusions
  • the blower device according to ⁇ 1> or ⁇ 2> wherein the plurality of protrusions are disposed at equal intervals between both ends of the air intake in a first direction when the air intake is viewed from the front.
  • the filter cover includes a frame body surrounding the plurality of columns, The air blower according to any one of ⁇ 1> to ⁇ 3>, wherein the frame abuts against a periphery of the air filter and holds the air filter in the housing.
  • the housing A plurality of housing side pillars are provided within the intake port, The plurality of housing side columns each include a housing side protrusion, The air blower according to any one of ⁇ 1> to ⁇ 4>, wherein the protrusion of the filter cover and the housing-side protrusion are arranged in a position that overlaps when the air intake is viewed from the front.
  • Blower device 20 Housing 30: Filter cover 31: Frame 39: Hinge 40: Air filter 90: Operation button 200: Internal space 201: Top wall 202: Bottom wall 203: Front wall 204: Rear wall 205: Side wall 206: Side wall 280: Intake port forming member 281: Intake port 283: Base 284: Recess 290: Exhaust path 291: Exhaust port 32 1, 322, 323: Pillars 321P, 323P: Protrusions 322H: Handles 340: Slits 390: Spaces 401, 402: Main surfaces 2801: Cylinders 2802: Wall-forming members 2811: Recesses 2812: Through holes 2821, 2822, 2823: Housing-side pillars 2821P, 2822P, 2823P: Housing-side protrusions ZnNF: Filter function-deteriorating portions

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Engineering & Computer Science (AREA)
  • Emergency Medicine (AREA)
  • Pulmonology (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
PCT/JP2023/036110 2022-10-06 2023-10-03 送風装置 WO2024075747A1 (ja)

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JP2024555820A JPWO2024075747A1 (enrdf_load_stackoverflow) 2022-10-06 2023-10-03

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JP2022161642 2022-10-06
JP2022-161642 2022-10-06

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WO (1) WO2024075747A1 (enrdf_load_stackoverflow)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4962845U (enrdf_load_stackoverflow) * 1972-09-11 1974-06-03
JPS6180360U (enrdf_load_stackoverflow) * 1984-10-31 1986-05-28

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4962845U (enrdf_load_stackoverflow) * 1972-09-11 1974-06-03
JPS6180360U (enrdf_load_stackoverflow) * 1984-10-31 1986-05-28

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