US3803773A - Reciprocating type portable filing machine - Google Patents

Reciprocating type portable filing machine Download PDF

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Publication number
US3803773A
US3803773A US00303430A US30343072A US3803773A US 3803773 A US3803773 A US 3803773A US 00303430 A US00303430 A US 00303430A US 30343072 A US30343072 A US 30343072A US 3803773 A US3803773 A US 3803773A
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US
United States
Prior art keywords
fluid
reciprocator
reciprocating type
filing
type portable
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
US00303430A
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English (en)
Inventor
K Odawara
M Magami
K Hirokawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nitto Kohki Co Ltd
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Nitto Kohki Co Ltd
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 Nitto Kohki Co Ltd filed Critical Nitto Kohki Co Ltd
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Publication of US3803773A publication Critical patent/US3803773A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D67/00—Filing or rasping machines or devices
    • B23D67/12—Hand-held or hand-operated filing or rasping devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/04—Portable grinding machines, e.g. hand-guided; Accessories therefor with oscillating grinding tools; Accessories therefor
    • B24B23/043—Portable grinding machines, e.g. hand-guided; Accessories therefor with oscillating grinding tools; Accessories therefor reciprocatingly driven by a pneumatic or hydraulic piston

Definitions

  • ABSTRACT A reciprocating type portable filing machine of a fluid actuatable structure having a finger operable valve mechanism for the pressured fluid introduction, a cylindrical reciprocator which is incorporated within a main body being resiliently loaded in axial directions, a piston slidable within the reciprocator in directions opposite to the sliding directions of the latter and a filing part coactive with the reciprocator for the filing work.
  • the present invention relates to a reciprocating type portable filing machine, more particularly relates to a portable filing machine of a reciprocating type which utilizes a combined effect of fluid actuated piston movement with resilient repulsion, the fluid being in general given in the form of compressed air.
  • the portable filing machine of the present invention includes a hollow main body, a main hand grip disposed to the top of the main body, a fluid actuatable reciprocator incorporated within the main body and resiliently loaded in axial directions a finger operable valve mechanism incorporated in the main hand grip so as to control the flow of the actuating fluid, a piston encased within the reciprocator, a filing part coactive with the reciprocator for the surface filing work and a roller bearing assembly inserted between the main body and the filing partfFluid exhaust passages connected to chambers on both sides of the piston within the reciprocator may desirably join together at a point appreciably remote from their upstream ends so that the discharge of the used fluid should not be influenced by the pressure prevailing within the reciprocator.
  • FIG. 1 is a vertical cross sectional plane view of an embodiment of the portable filing machine of the present invention
  • FIG. 2 is a cross sectional plane view taken along a line 2-2 in FIG. I;
  • FIG. 3 is a cross sectional plane view taken along a line 3-3 in FIG. I;
  • FIG. 4 is a cross sectional plane view taken along a line 4-4 in FIG. 1;
  • FIG. 5 is a cross sectional plane view taken along the line 55 in FIG. 1-;
  • FIG. 6 is a vertical cross sectional plane view of a main part of the main hand grip of the apparatus shown in FIG. 1; a
  • FIG. 7 is an explanatory perspective plane view of the roller bearing assembly in a disassembled condition.
  • the machine includes a hollow main body 30; a main hand grip 10, secured on the main body 30, for handling of the machine by operators; a mechanism incorporated inside the main hand grip 10 for control of flow of fluid medium used for actuation of the filing work; a fluid actuated cylindrical reciprocator 60 disposed axially slidably within the main body 30; an axially slidable piston 80, contained within the cylindrical reciprocator 60, and; a filing part 90, disposed downside of the main body 30 in rigid connection with the reciprocator 60.
  • the main hand grip 10 is accompanied by an auxiliary front hand grip 38 threaded into the front end part of the main body 30.
  • the main hand grip 10 is provided with a front bore 16 opening on the front side at 17.
  • the bore 16 merges into a fluid intake passage 11 formed in the rear portion of the grip 10.
  • a trigger 19 is pivoted to the body of the grip 10 via a lateral pin 20.
  • the trigger l9 possesses a front nose 18 for operation by an operators thumb or fingers.
  • the trigger 19 is accompanied with a rearwardly extending valve actuator 21 which is pivoted to the former via a lateral pin 22.
  • confronts the front end of a valve member 23 incorporated within the rearward extension of the bore 16.
  • the fluid intake passage 11 is connected to a given supply source of the fluid medium via a fluid intake pipe 24 which is threaded at its downstream end into the passage 11.
  • This fluid intake passage 11 is con nected to a vertical fluid intake passage 12.
  • a fluid exhaust passage 13 is formed in the rear portion of the grip l0, separately from the fluid intake passage 11, and is connected to a horizontal fluid exhaust passage 15 via a vertical fluid exhaust passage 14.
  • the fluid exhaust passage 13 opens into a fluid exhaust pipe 25 spacedly embracing the fluid intake pipe 24.
  • the fluid exhaust pipe 25 is connected air tight to the rear end of the grip 10.
  • the main body 30 is secured to the bottom face of the main hand grip 10 by set bolts 27 and 28 via an intermediate gasket 26.
  • the main body 31 is internally provided with a cylinder bore 31 which extends over the entire length of the main body and provided on the outside with an auxiliary hand grip 38 threaded at its leg portion into the front portion of the main body.
  • a fluid passage 34 is formed and connected with the 2nd fluid exhaust passage 14 running through the body of the hand grip 10.
  • the fluid passage 34 runs horizontally, parallel to the third fluid exhaust passage 15.
  • the fluid passage 34 terminates at a rear annular groove 35 formed in the wall of the main bore 31.
  • the third fluid exhaust passage 15 runs further forward through the body of the hand grip l0 and isconnected to a front annular groove 37, formed in the wall of the main bore 31, via a vertical fluid passage 36 formed through the mainbody 30.
  • the main body 30 is further internally provided with a vertical hole 33 which joins the main bore 31 at a right angle and is connected to the second fluid intake passage 12 in the main hand grip 10 via a connecting passage 32.
  • the front end of the main bore 31 is closed by an end wall 41 detachably fixed thereto by a suitable fastener ring 39.
  • the end wall 41 is internally and coaxially accompanied with a cushion abutment 43 secured thereto by a set bolt 45.
  • the cushion abutment 43 is made up of elastic materials such as rubber or the like.
  • a coil compression spring 47 is inserted over the cushion abutment 43 and extends between the inner face of the end wall 41 and the front face of the fluid actuated cylindrical reciprocator 60.
  • an end wall 42, a fastener ring 40, a cushion abutment 44, a set bolt 46 and a coil compression spring 48 are arranged in a same order as on the above-described front end side of the main bore 31. Further, in the front and rear end regions, the main bore 31 is provided with longitudinal guide grooves 49 and 50, respectively, formed in its wall.
  • the fluid actuated cylindrical reciprocator 60 is contained within the main bore 31 in an axially slidable arrangement. Both ends of the reciprocator 60 are closed by sealing caps 71 and 72 which are fixed in position by pins 69 and 70, respectively. As already described, outer faces of the caps '71 and 72 are in pressure contact with inner ends of the compression springs 47 and 48, respectively.
  • the sealing caps 71 and 72 are provided with downwardly protruding carrier legs 73 and 74, respectively.
  • the carrier legs 73 and 74 serve for assemblage of the filing part 90 to the main body 30 as later explained in more detail.
  • the reciprocator 60 is provided with fluid inlet ports 61 and fluid outlet ports 62 and 63 formed through its peripheral wall. Further, the reciprocator 60 is provided with a rear annular groove 65 and a front annular groove 64 formed in its peripheral wall 68. The wall 68 is further provided with a cut-out 66 and a passage 67 connected to the cut-out 66, the cut-out 66 forming reservoir for the pressured fluid.
  • the diameters of the fluid inlet ports 61 decrease from the middle one to the terminal ones 61a and 6112. In the disposition shown in FIG. 1, the annular grooves 64 and 65 of the reciprocator 60 respectively meet the annular grooves 37 and 35 of the main body 30.
  • the piston 80 is encased within the reciprocator 60 in an axially slidable arrangement leaving fluid chambers 77, 78 on both ends thereof.
  • This piston is provided with a fluid passage 81 opening on one hand into the leftward fluid chamber 77 and on the other hand into an annular groove 84 formed on its periphery; and another fluid passage 82 opening on one hand into the rightward fluid chamber 78 and on the other hand into an annular groove 83 formed on its periphery also.
  • the filing part 90 includes a support layer 93 secured to the carrier legs 73 and 74 of the reciprocator 60 by set bolts 75 and 76 via intermediate members 91 and 92.
  • a body file 95 is attached to the support layer 93 by holder mechanisms 97 and 98 while sandwiching a cushion layer 94 of elastic nature and an intermediate friction layer 96 for preventing undesirable accidental slippage of the body file 95.
  • the holder mechanisms 97 and 98 are located on both ends of the length of the filing part 90.
  • the roller bearing assembly 100 In between the main body 30 and the filing part 90, there is disposed a roller bearing assembly 100 which is shown in FIG. 7 in a disassembled disposition.
  • the roller bearing assembly 100 includes, from top to bottom, a carrier plate 101 which carries a plurality of bearing rollers 102.
  • the bearing rollers 102 expose their peripheries somewhat beyond both faces of the carrier plate 101 and are arranged spacedly side by side with their axles being at right angles with respect to the reciprocating direction of the filing part 90.
  • a supporter plate 103 is placed beneath the bearing rollers 102.
  • the above-mentioned three members 101, 102 and 103 are received within a guide frame 104 mounted on the support layer 93.
  • the inner length of the guide frame 104 is selected somewhat larger than the length of the carrier plate 101 so that the latter can slide longitudinally within the guide frame 104 upon reciprocation of the filing part 90.
  • the nose 18 of the trigger 19 is turned by thumb or finger from the disposition shown in FIG. 1 to that shown in FIG. 6 so that the valve member 23 is forced to slide rearwardly via the valve actuator 21.
  • the fluid intake passage 11 is brought into communication with the second fluid intake passage 12.
  • the pressured fluid supplied from the fluid intake pipe 24 is brought into the interior of the reciprocator passing through the fluid intake passage 11, the second fluid intake passage 12, the connecting passage 32 (see FIG. 3) and the vertical hole 33 of the main body 30.
  • both the reciprocator 60 and the piston 80 are positioned about midway in main bore 31 interior. But, in practical operation, they move in directions opposite each other.
  • the pressured fluid is introduced into the right side fluid chamber 78 via the fluid inlet port 61 of the reciprocator 60, the annular groove 83 on the periphery of the piston 80 and the fluid passage 82 within the body of the piston 80.
  • the increased pressure inside the fluid chamber 78 caused by this pressured fluid introduction presses the inner face of the right side sealing cap 72 and, consequently, the reciprocator 60 as a whole is moved rightwards in the drawing, i.e. rearwards in the structure of the filing machine.
  • the magnitude of the fluid pressure within the chamber 78 exceeds the magnitude of the force produced by the right side compression spring 48.
  • this fluid pressure within the right side (rear side) fluid chamber 78 forces the piston 80 to slide leftwards (forwards) in the reciprocator 60.
  • the right side fluid outlet ports 63 come into communication with the interior or reciprocator 60, i.e. the right side fluid chamber 78, and the fluid in the chamber 78 is discharged outside the machine via the port 63, the annular groove of the reciprocator 60, the annular groove 35 of the main body 30, the fluid passage 34, the exhaust passages 14 and 13 and the fluid exhaust pipe 25.
  • the annular groove 84 of the piston 80 isregistered at the fluid inlet port 61 of the reciprocator 60 and the pressured fluid is now introduced into the leftward fluid chamber 77 via the inlet port 61, the annular groove 84 and the fluid passage 81 of the piston 80. Due to this introduction of the pressured fluid into the chamber 77, the piston 80 is now urged to move rightwards.
  • the reciprocator 60 is forced to move leftwards by the repellent force produced by the right side compression spring 48. This leftward movement of the reciprocator 60 is further assisted by the fluid pressure within the chamber 77 already caused by the leftward sliding of the piston 80 in the reciprocator 60.
  • the leftward movement of the reciprocator 60 associated with the rightward sliding of the piston 80 within the reciprocator 60 allows communication between the leftward fluid outlet port 62 and the interior of the reciprocator 60 and, due to the establishment of this fluid flow communication, the pressured fluid is discharged'from the left side fluid chamber 77 via the outlet port 62, the annular groove 37, the fluid passage 36, the horizontal fluid exhaust passage 15, the vertical fluid passage 14, the horizontal fluid passage 13 and the fluid exhaust pipe 25. Shocks caused by the above-described reciprocal movement of the reciprocator 60 in the main bore 31 are effectively absorbed by the cushion abutments 43 and 44 provided on both ends of the main bore 31 interior.
  • the body file 95 carries out the filing work'through its sliding contact with the-surface to be finished.
  • the pressured fluid is introduced into the cut-out (reservoir) 66 from the annular grooves 83 and/or 84 via the passage 67.
  • the reciprocator 60 is maintained in a somewhat lifted condition during its reciprocation and damage to the main bore wall can be effectively prevented.
  • the sealing caps 71 and 72 are fixed to the ends of the reciprocator 60 by pins 69 and 70.
  • the length of at least one of the pins 69 and 70 is selected shorter than the inner diameter of the cylindrical reciprocator 60.
  • a reciprocating type portable filing machine comprising, in combination, a main hand grip adapted for an operators handling of the machine and provided with a fluid intake passage and a first fluid exhaust passage; a pressured fluid supply system external of said main hand grip and connecting said fluid intake passage to a given supply source of said pressured fluid; a used fluid exhaust system external; of said main hand grip-and connected to said first fluid exhaust passage; a finger operable valve and its related assembly incorporated within said main hand grip for control of the pressured fluid supply through said fluid intake passage; a hollow main body disposed to the bottom of said main hand grip confining a longitudinally elongated main bore which is closed at both ends and provided with a fluid intake hole connected to said fluid intake passage of said main hand grip and a second fluid exhaust passage joining at its downstream end with said first fluid exhaust passage; a fluid actuated cylindrical reciprocator encased within said main bore in an axially reciprocating arrangement and provided with fluid inlet ports capable of being connected to said fluid intake hole of said main body and also provided with fluid outlet ports
  • valve actuator pivoted to said trigger and extending rearwardly through said front bore and a valve member disposed at the junction of said front bore with said fluid intake passage in an arrangement capable of being activated by said valve actuator.
  • a reciprocating type portable filing machine as claimed in claim 1 wherein said fluid exhaust passage joins with said first fluid exhaust passage at a point remote from their upstream ends.
  • a reciprocating type portable filing machine as claimed in claim 1 wherein the internal chamber of said reciprocator is closed at both ends by sealing caps detachably fixed to the cylindrical wall thereof.
  • a reciprocating type portable filing machine as claimed in claim 5 wherein the fixing of said sealing cap to said cylindrical wall is effected by a pin at least one of whose length is shorter than the internal diameter of the chamber.
  • a reciprocating type portable filing machine as claimed in claim 1 wherein one of said fluid intake passages of said piston opens at the front end face of said piston and the other of said fluid intake passages opens at the rear end face of said piston.
  • a reciprocating type portable filing machine as claimed in claim 1 wherein said filing part includes a support layer, a cushion layer disposed underneath of said support layer an intermediate friction layer disposed underneath said cushion layer and a body file detachably arranged underneath said intermediate friction layer.
  • roller bearing assembly includes a carrier plate, a plurality of bearing rollers which are axially rotatably carried by said carrier plate in a spaced side by side arrangement with their axes running at right angles to the direction of reciprocation of said filing part, a supporter plate disposed underneath said bearing rollers and a guide frame fixed on said filing part and accommodating the above recited elements in its center cavity.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Preliminary Treatment Of Fibers (AREA)
US00303430A 1972-07-20 1972-11-03 Reciprocating type portable filing machine Expired - Lifetime US3803773A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP47072862A JPS4930996A (is") 1972-07-20 1972-07-20

Publications (1)

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US3803773A true US3803773A (en) 1974-04-16

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ID=13501565

Family Applications (1)

Application Number Title Priority Date Filing Date
US00303430A Expired - Lifetime US3803773A (en) 1972-07-20 1972-11-03 Reciprocating type portable filing machine

Country Status (9)

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US (1) US3803773A (is")
JP (1) JPS4930996A (is")
AU (1) AU467879B2 (is")
CA (1) CA964445A (is")
DE (1) DE2300964B2 (is")
FR (1) FR2193339A5 (is")
GB (1) GB1405856A (is")
IT (1) IT970046B (is")
SE (1) SE398310B (is")

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3892091A (en) * 1974-10-17 1975-07-01 Alma A Hutchins Abrading tool utilizing a self adhesive abrading sheet
US3932963A (en) * 1974-08-19 1976-01-20 Hutchins Alma A Straight line abrading tool
US4014249A (en) * 1975-09-18 1977-03-29 Florida Pneumatic Manufacturing Corporation Pneumatically actuated sanding tool
US4228620A (en) * 1979-02-14 1980-10-21 Hutchins Manufacturing Company Abrading tool with wear plate
US5074081A (en) * 1991-06-12 1991-12-24 Ryobi Motor Products Corp. Sander with removable auxiliary handle

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5511903A (en) * 1978-07-10 1980-01-28 Kazuyoshi Kuroda Vehicle notifying approach of emergency vehicle
JPS6039062A (ja) * 1983-08-12 1985-02-28 Hitachi Koki Co Ltd 研磨機のパツドの磨耗防止機構
US6260591B1 (en) 1999-08-11 2001-07-17 Black & Decker Inc. Biscuit joiner

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2618107A (en) * 1949-08-16 1952-11-18 Hutchins Alma A Tool reciprocating device
US2772663A (en) * 1954-05-14 1956-12-04 Alice R Larson Air driven sander
US2957282A (en) * 1956-03-29 1960-10-25 Bernard A Swanson Reciprocating mounting means for mounting thereon a sanding or like tool

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5410754A (en) * 1977-06-23 1979-01-26 Philips Nv Optical device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2618107A (en) * 1949-08-16 1952-11-18 Hutchins Alma A Tool reciprocating device
US2772663A (en) * 1954-05-14 1956-12-04 Alice R Larson Air driven sander
US2957282A (en) * 1956-03-29 1960-10-25 Bernard A Swanson Reciprocating mounting means for mounting thereon a sanding or like tool

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3932963A (en) * 1974-08-19 1976-01-20 Hutchins Alma A Straight line abrading tool
US3892091A (en) * 1974-10-17 1975-07-01 Alma A Hutchins Abrading tool utilizing a self adhesive abrading sheet
US4014249A (en) * 1975-09-18 1977-03-29 Florida Pneumatic Manufacturing Corporation Pneumatically actuated sanding tool
US4228620A (en) * 1979-02-14 1980-10-21 Hutchins Manufacturing Company Abrading tool with wear plate
US5074081A (en) * 1991-06-12 1991-12-24 Ryobi Motor Products Corp. Sander with removable auxiliary handle

Also Published As

Publication number Publication date
DE2300964B2 (de) 1979-05-23
SE398310B (sv) 1977-12-19
JPS4930996A (is") 1974-03-19
GB1405856A (en) 1975-09-10
AU4796772A (en) 1974-04-26
CA964445A (en) 1975-03-18
DE2300964A1 (de) 1974-01-31
FR2193339A5 (is") 1974-02-15
AU467879B2 (en) 1974-04-26
IT970046B (it) 1974-04-10

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