USRE32575E - Hand grinder and valve therefore - Google Patents

Hand grinder and valve therefore Download PDF

Info

Publication number
USRE32575E
USRE32575E US06/893,389 US89338986A USRE32575E US RE32575 E USRE32575 E US RE32575E US 89338986 A US89338986 A US 89338986A US RE32575 E USRE32575 E US RE32575E
Authority
US
United States
Prior art keywords
valve
casing
handle
hand grinder
spindle
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
US06/893,389
Other languages
English (en)
Inventor
Keld O. Hundebol
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.)
HH Patent AS
Original Assignee
HH Patent AS
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 HH Patent AS filed Critical HH Patent AS
Assigned to HH PATENT APS, DRODEVJ 14 DK-6923 ANSAGER DENMARK DANISH reassignment HH PATENT APS, DRODEVJ 14 DK-6923 ANSAGER DENMARK DANISH ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: HUNDEBOL, KELD O.
Application granted granted Critical
Publication of USRE32575E publication Critical patent/USRE32575E/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/12—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with streamlined valve member around which the fluid flows when the valve is opened
    • 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
    • B24B15/00—Machines or devices designed for grinding seat surfaces; Accessories therefor
    • 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
    • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • B24B23/026—Fluid driven
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
    • F16P3/00—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body
    • F16P3/18—Control arrangements requiring the use of both hands
    • F16P3/22—Control arrangements requiring the use of both hands for hydraulic or pneumatic control systems

Definitions

  • the invention relates to a valve comprising a displacable valve body which can abut a valve seat and limit the flow of a medium.
  • Valves of this type are used for regulating and controlling working mediums in the form of compressed air and liquids utilized in air and hydraulic machines, respectively, of various types.
  • the invention furthermore relates to a hand grinder comprising a valve as mentioned above.
  • Such grinders must be operated in a suitable and safe manner and therefore it must be possible for the user to adjust the valve in a convenient way dependent of the situation of use in question.
  • the machine In case of hand tools, the machine must therefore be manually adjustable and preferably without impairing the control of the tool so that damages may be incurred on tools and/or work.
  • a valve comprising a valve casing closed at one end and having an inlet for the medium at said end, and where on the inner side from said end there is extending a stem provided with a valve body, said body facing the end of the casing and cooperating with a valve seat designed as a recess in a bushing wherein the stem can be axially displaced.
  • valve which can be designed in a handle forming one of the holding positions on a tool so that the medium can be admitted to the rear of the handle at the closed end of the casing, e.g. through a hose, and through the valve to the opening in the bushing and then, e.g. through a pipe, to the working machine. From there the medium can be admitted through a second handle, if any, which can likewise be provided with a handle.
  • the pipe can form part of the tool equipment so that the control and regulating functions can be effected by means of one of the handles with a built-in regulating valve.
  • the operation of the valve takes place by an axial movement of the valve casing.
  • valve casing By designing the valve casing the valve becomes self-closing without any use of auxiliary springs so that the pressure exerted by the medium will close the valve. This gives a high degree of operating comfort and at the same time great security of the valve being closed when the operator's hold of the handle is released.
  • the valve By making the casing rotatable, the valve can be produced by such simple operations as boring and turning.
  • the regulating can take place by a small turn of the casing.
  • valve By designing the valve, it can be constructed by simple components which are partly cheaply produced and partly easily replaced.
  • the invention also relates to a hand grinder which can use the valve according to the invention.
  • a grinder according to the invention can suitably be provided with a safety guard. The user is thereby given a high degree of safety in that the entire rear of the grinder is fenced.
  • the grinding means disclosed comprising an assembly of a plurality of slotted discs
  • an efficient hand grinder is obtained, where the disc slats can efficiently grind even very irregular surfaces.
  • it is easy to replace the slotted disc assembly since it need only be provided with new grinding discs between the retaining discs. The whole assembly is simply secured by a screw at the end of the spindle.
  • Such grinding discs are mentioned in the applicant's U.S. patent application Ser. No. 395,001 now U.S. Pat. No. 4,518,452.
  • FIG. 1 is a sectional view of the valve in its closed position along the line I--I in FIG. 3,
  • FIG. 2 is the same valve, but in its open position
  • FIG. 3 is a perspective view of the valve
  • FIG. 4 is a sectional view of the hand grinder shown in FIG. 5 in the direction of the arrows along the line IV--IV in FIG. 5, and
  • FIG. 5 is a top view of a hand grinder according to FIG. 4.
  • the drawing shows an embodiment of the invention wherein the valve forms part of the control handle or the guide 5 of a machine-driven grinder.
  • the grinder is provided with a guide, one end of which is shown in the drawing as the pipe 5 being the end of the right or left part of the guide.
  • the working medium in the form of compressed air or liquid is admitted to the machine through a hose 13 connected to the valve by a hose coupling 12 which can be of any suitable type.
  • the valve itself comprises a casing 1 which is rotatable about the longitudinal axis and which on the outside can be covered with rubber 16 to improve comfort and to ensure a firm grip.
  • the casing 1 is closed at one end so that an intake chamber 11 is formed at the coupling 12.
  • a bolt 10 retaining partly a dished ring part 7 and partly a spacing pipe 8 retaining the ring part 7 at a given distance from the end of the casing is screwed into the end wall of the casing.
  • an oblique through-going track is arranged in the casing.
  • this track it is possible to displace a bolt head 3 so that a turn of the casing gives an axial movement thereof relative to a stationary bushing 2.
  • This bushing has been inserted in the casing so as to extend a suitable distance into the casing and at the end being provided with a circumferential groove wherein a packing 6 is arranged providing a seal between bushing and casing.
  • the bushing is provided with a recess forming on its outwardly extending surface extending at right angles to the axis a seat 14 in the valve.
  • the bolt 3 securing the casing in its position is moreover screwed into this recess.
  • the bushing 2 is provided with an external thread which can be screwed into the pipe 5 and through which the working medium is admitted when operating.
  • the valve is assembled with a packing 9 between the ring 7 and the pipe 8 so that in the position shown in FIG. 1 the valve has completely cut off the working medium to the machine.
  • the casing When releasing the handle, the casing on account of the pressure of the working medium on the end surface being larger than the end area of the bushing will move the casing to the right and thereby the valve body towards the valve seat and so closing the valve.
  • the valve is therefore a self-closing valve which is totally independent of compression springs or the like.
  • this simple and reliable valve renders a continuously variable control of the machine power at the same time as full control of the tool operation is maintained. Furthermore, there is the abovementioned security of an immediate stop of the machine in case the hold on the handle should cease.
  • FIGS. 4 and 5 show a hand grinder according to the invention.
  • the hand grinder is provided with a handle pipe 17 being substantially U-shaped.
  • the handle pipe 17 is shown with a bend so that the handles 25,26 are situated closer to the user than the center of the grinder. This to a high degree facilitates the operator's use on the machine.
  • the handle pipe is provided with handles 25, 26, and the handle pipe 17 is moreover provided with an inlet passage 18 and an outlet passage 19.
  • the passages 18, 19 should mearly be the inside diameter of the pipe.
  • valve 21 In the handle 25 there is arranged a valve 21 according to the invention, said valve having an inlet nozzle 22 being suitably provided with a snap action coupling for a pressure hose.
  • the outet passage 19 ends with an outlet opening 23. This can e.g. be provided with a filter 24 or a sound-absorbing device just as the outlet opening 23 can be connected to a return hose for hydraulic liquid.
  • the machine 20 is arranged within a hollow spindle 27.
  • This can suitably be driven by compressed air, but a hydraulic machine or motor can also be used.
  • the machine 20 is controlled by the valve 21, said machine making the spindle 27 rotate.
  • a number of grinding discs 28 are secured to the spindle by means of retaining discs 31. These grinding discs can suitably consist of sand paper or emery cloth, but other materials are available.
  • the discs 28 are slotted so that they comprise a plurality of slats. These slats can be made double so that both sides are grinding.
  • the spindle can be covered with wool or the like for polishing purposes.
  • the hand grinder is moreover provided with a safety guard 30.
  • This is dome-shaped so as to encircle the part of the grinding means facing the user.
  • the safety guard 30 is suitably made from a light and strong plastic material.
  • the safety guard can be designed in a great number of other ways so that they can be semicircular or quadrangular.
  • the handle pipe 17 can conveniently be made of aluminium. It is very important to reduce the weight of the grinder so as to avoid the user becoming tired. Due to its compactness and the possibility of using light materials, the grinder can be made very light.
  • the grinding discs 28 are secured to the spindle 27 between retaining discs 31. These are tightened between a removable flange 33 and a fixed flange 32 by means of a center screw 29. When the grinding discs 28 are worn out, they can therefore be replaced.
  • the retaining discs 31 are provided with a center opening fitting into the spindle 27. This can e.g. be provided with a longitudinal toothing for securing the grinding discs being tightedly fixed or in some other manner retained between the retaining discs 31.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Lift Valve (AREA)
  • Self-Closing Valves And Venting Or Aerating Valves (AREA)
  • Mechanically-Actuated Valves (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Massaging Devices (AREA)
  • Toys (AREA)
US06/893,389 1982-12-16 1986-08-05 Hand grinder and valve therefore Expired - Lifetime USRE32575E (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK5575/82 1982-12-16
DK557582A DK157826C (da) 1982-12-16 1982-12-16 Ventil, fortrinsvis til anbringelse i tilfoerselsledningen for trykluft til et haandvaerktoej

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US06/467,668 Reissue US4580369A (en) 1983-02-18 1983-02-18 Hand grinder and valve therefore

Publications (1)

Publication Number Publication Date
USRE32575E true USRE32575E (en) 1988-01-12

Family

ID=8143625

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/893,389 Expired - Lifetime USRE32575E (en) 1982-12-16 1986-08-05 Hand grinder and valve therefore

Country Status (14)

Country Link
US (1) USRE32575E (enrdf_load_stackoverflow)
JP (1) JPS59131069A (enrdf_load_stackoverflow)
AT (1) AT389269B (enrdf_load_stackoverflow)
CA (1) CA1219574A (enrdf_load_stackoverflow)
CH (1) CH661970A5 (enrdf_load_stackoverflow)
DE (1) DE3310667C2 (enrdf_load_stackoverflow)
DK (1) DK157826C (enrdf_load_stackoverflow)
FI (1) FI77097C (enrdf_load_stackoverflow)
FR (1) FR2538066B1 (enrdf_load_stackoverflow)
GB (1) GB2133123B (enrdf_load_stackoverflow)
IT (1) IT1167593B (enrdf_load_stackoverflow)
NL (1) NL8304308A (enrdf_load_stackoverflow)
NO (1) NO161700C (enrdf_load_stackoverflow)
SE (1) SE454109B (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6705933B2 (en) * 2001-04-12 2004-03-16 Hilti Aktiengesellschaft Device for regulating amount of liquid fed to a hand-held tool
US20100132121A1 (en) * 2006-04-19 2010-06-03 Richard Chao Support cushion for fast inflation and deflation

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2581911A1 (fr) * 1985-05-20 1986-11-21 Pierrel Jean Marie Meuleuse d'angle a moteur hydraulique et a arrivee d'eau centrale
DE3903781A1 (de) * 1989-02-09 1990-08-16 Festo Kg Ventil
DE4413560C2 (de) * 1994-04-19 1998-02-12 Lancier Masch Peter Hydraulik-Steuervorrichtung für Rettungsgeräte
DE19547408A1 (de) * 1995-12-19 1997-07-03 A B Elektronik Gmbh Vorrichtung zur Steuerung der Verstellung einer die Leistung eines Motorrad-Motors bestimmenden Drosselklappe
FR2803646B1 (fr) * 2000-01-07 2002-08-30 Air Liquide Vanne de vidange d'un recipient contenant un fluide et ensemble constitue par ce recipient et cette vanne de vidange
US6655033B2 (en) * 2001-10-16 2003-12-02 Bettcher Indusrties, Inc. Pneumatic hand tool with improved control valve

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US674971A (en) * 1900-10-08 1901-05-28 Edward N Hurley Combined handle and throttle-valve for pneumatic tools.
US841322A (en) * 1904-06-13 1907-01-15 Edmund Hoxie Throttle-valve.
US903451A (en) * 1908-01-16 1908-11-10 Charles Clark Faucet.
US904134A (en) * 1908-01-30 1908-11-17 Charles J Day Faucet.
US1298007A (en) * 1918-07-10 1919-03-25 Frederick K Daggett Automatic check-valve for compressed-air drilling-machines.
US1356580A (en) * 1919-07-05 1920-10-26 Daniel P Witman Safety air-valve
US2125554A (en) * 1936-08-17 1938-08-02 Imp Brass Mfg Co Line valve
US2192459A (en) * 1938-03-07 1940-03-05 Robert K Taylor Rotary surfacing tool
US2326396A (en) * 1942-02-14 1943-08-10 Chicago Pneumatic Tool Co Safety governor for pneumatic tools
US2548923A (en) * 1945-08-20 1951-04-17 Frank J Walters Rotary cleaning tool

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR701988A (fr) * 1930-01-18 1931-03-26 Robinet
FR823841A (fr) * 1936-07-04 1938-01-27 Robinet
US2670173A (en) * 1948-07-06 1954-02-23 St West Inc Quick-acting shutoff valve having renewable valve seat
FR1379754A (fr) * 1963-10-16 1964-11-27 Commissariat Energie Atomique Robinet étanche
US3775911A (en) * 1972-01-24 1973-12-04 Thor Power Tool Co Dual safety control for a power tool
JPS52103434U (enrdf_load_stackoverflow) * 1976-02-04 1977-08-05
US4148438A (en) * 1977-09-28 1979-04-10 Stanadyne, Inc. Anti-siphon spray head
DE2822733A1 (de) * 1978-05-22 1979-11-29 Merit Abrasive Prod Lappenschleifrad
DE2843376A1 (de) * 1978-10-05 1980-04-24 Bosch Gmbh Robert Druckmittelumlaufmotor mit geraeuschdaempfung
US4399638A (en) * 1981-09-01 1983-08-23 Black & Decker Inc. Switching system for an air-driven tool

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US674971A (en) * 1900-10-08 1901-05-28 Edward N Hurley Combined handle and throttle-valve for pneumatic tools.
US841322A (en) * 1904-06-13 1907-01-15 Edmund Hoxie Throttle-valve.
US903451A (en) * 1908-01-16 1908-11-10 Charles Clark Faucet.
US904134A (en) * 1908-01-30 1908-11-17 Charles J Day Faucet.
US1298007A (en) * 1918-07-10 1919-03-25 Frederick K Daggett Automatic check-valve for compressed-air drilling-machines.
US1356580A (en) * 1919-07-05 1920-10-26 Daniel P Witman Safety air-valve
US2125554A (en) * 1936-08-17 1938-08-02 Imp Brass Mfg Co Line valve
US2192459A (en) * 1938-03-07 1940-03-05 Robert K Taylor Rotary surfacing tool
US2326396A (en) * 1942-02-14 1943-08-10 Chicago Pneumatic Tool Co Safety governor for pneumatic tools
US2548923A (en) * 1945-08-20 1951-04-17 Frank J Walters Rotary cleaning tool

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6705933B2 (en) * 2001-04-12 2004-03-16 Hilti Aktiengesellschaft Device for regulating amount of liquid fed to a hand-held tool
US20100132121A1 (en) * 2006-04-19 2010-06-03 Richard Chao Support cushion for fast inflation and deflation

Also Published As

Publication number Publication date
DE3310667A1 (de) 1984-06-20
GB2133123A (en) 1984-07-18
GB2133123B (en) 1986-04-09
NO834376L (no) 1984-06-18
JPS59131069A (ja) 1984-07-27
FR2538066A1 (fr) 1984-06-22
JPH0549863B2 (enrdf_load_stackoverflow) 1993-07-27
FI77097C (fi) 1989-01-10
FI834619A7 (fi) 1984-06-17
NL8304308A (nl) 1984-07-16
FI834619A0 (fi) 1983-12-15
DK157826B (da) 1990-02-19
GB8332749D0 (en) 1984-01-18
SE8306580D0 (sv) 1983-11-29
FI77097B (fi) 1988-09-30
DE3310667C2 (de) 1997-03-06
DK157826C (da) 1990-09-24
ATA334683A (de) 1989-04-15
IT8324053A0 (it) 1983-12-06
CH661970A5 (de) 1987-08-31
IT1167593B (it) 1987-05-13
FR2538066B1 (fr) 1986-12-19
SE8306580L (sv) 1984-06-17
DK557582A (da) 1984-06-17
SE454109B (sv) 1988-03-28
NO161700B (no) 1989-06-05
CA1219574A (en) 1987-03-24
NO161700C (no) 1989-09-13
AT389269B (de) 1989-11-10

Similar Documents

Publication Publication Date Title
USRE32575E (en) Hand grinder and valve therefore
US2794303A (en) Power-driven hand tool
US5440815A (en) Guide for rotary cutter tools
US7625264B1 (en) Pneumatic dry wall sander
US4193228A (en) Water driven tool
AU2377400A (en) Auxiliary surface treating arrangement for surface treating device
US5911281A (en) Pneumatic power tool
US4580369A (en) Hand grinder and valve therefore
US4821457A (en) Vertical oscillating spindle sanders
CA2332388A1 (en) Grinding machine with single-handed operation
WO1994014579A1 (en) Mechanical lockout for a pneumatic tool
US5620364A (en) Water-driven rotary tool
US3775911A (en) Dual safety control for a power tool
MXPA97005952A (en) Tripuration vessel and retene device
KR102193670B1 (ko) 그라인더 안전장치
TWI566882B (zh) Pneumatic grinding machine
EP3659764B1 (en) Power tool debris management
KR101602577B1 (ko) 에어 집진 스위핑 장치
US4934012A (en) Device for brushing the gasket face of a manhole for gaining access to the inside of a vessel
KR100685299B1 (ko) 집진장치가 구비된 안전조끼
RU231696U1 (ru) Штроборез
US20250162103A1 (en) Water powered rotary tool
WO2006124093A2 (en) Water-driven tool
RU2053103C1 (ru) Ручная машина
SU1761499A1 (ru) Заглаживающа машина

Legal Events

Date Code Title Description
AS Assignment

Owner name: HH PATENT APS, DRODEVJ 14 DK-6923 ANSAGER DENMARK

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:HUNDEBOL, KELD O.;REEL/FRAME:004735/0229

Effective date: 19870608

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: SMALL ENTITY

FPAY Fee payment

Year of fee payment: 4

FPAY Fee payment

Year of fee payment: 8

FPAY Fee payment

Year of fee payment: 12