EP0653973B1 - Belt grinder - Google Patents

Belt grinder Download PDF

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Publication number
EP0653973B1
EP0653973B1 EP93914614A EP93914614A EP0653973B1 EP 0653973 B1 EP0653973 B1 EP 0653973B1 EP 93914614 A EP93914614 A EP 93914614A EP 93914614 A EP93914614 A EP 93914614A EP 0653973 B1 EP0653973 B1 EP 0653973B1
Authority
EP
European Patent Office
Prior art keywords
belt
motor housing
box
insert plate
grinder
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
EP93914614A
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German (de)
French (fr)
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EP0653973A1 (en
Inventor
Cornelius Boeck
Rudolf Fuchs
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.)
Robert Bosch GmbH
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Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0653973A1 publication Critical patent/EP0653973A1/en
Application granted granted Critical
Publication of EP0653973B1 publication Critical patent/EP0653973B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • B24B23/06—Portable grinding machines, e.g. hand-guided; Accessories therefor with abrasive belts, e.g. with endless travelling belts; 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
    • B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
    • B24B21/18—Accessories
    • B24B21/20—Accessories for controlling or adjusting the tracking or the tension of the grinding belt

Definitions

  • the invention is based on a belt sander according to the preamble of claim 1.
  • a belt sander is known from US-A-2 544 810. From DE 37 15 292 A1 a belt sander is known in which both the motor shaft and the driven belt roller each carry a pulley. The distance between the pulleys is determined by the design. However, the tension of the belt stretched over it cannot subsequently be corrected. If the belt is too tight, this will reduce the performance of the belt sander and can lead to premature wear on the bearings and belts. A belt that is too weakly tensioned also wears out more quickly, leads to slippage and often causes annoying loud running noises.
  • the belt sander according to the invention with the characterizing features of claim 1 has the advantage that the belt tension can be easily adjusted with the device already installed. This can be used to compensate for manufacturing tolerances on the motor housing and belt runner or the bearing of the output shaft and belt roller as well as length tolerances for the belt itself.
  • a belt sander which has a belt running box in which a grinding belt guided over belt rollers rotates, with a motor housing placed on the belt running box and preferably connectable to it by screws, and with a belt pulley and a belt for transferring the engine torque to a belt drive having the belt rollers.
  • the belt sander has means which act to adjust the distance between the belt wheels which determines the belt tension.
  • a handling extension can be reached from the outside in any position and is covered by the cover of the belt drive after adjustment.
  • FIG. 1 shows a perspective view
  • FIG. 2 shows a top view of the tape drive box with the motor housing removed
  • FIG. 3 shows a perspective view of an insert plate.
  • a hand-held belt sander has a two-part motor housing 2 made of plastic with a lower part 3 and an upper part 4 which accommodates a motor and a transmission.
  • a handle 5 with a switch 6 is molded onto the lower part 3.
  • a housing cap covering the switch 6 and part of the upper part 4 is removed and not shown.
  • the motor housing 2 is placed on a belt conveyor box 7 made of aluminum and screwed to it by means of screws 8. 9 with the approximately horizontal parting line between the motor housing 2 and the belt runner 7 is designated.
  • a sanding belt guided over two belt rollers 10, 11 rotates in the belt conveyor box 7.
  • One of the belt rollers 10 is connected in a rotationally fixed manner to a first toothed belt wheel 14 which projects laterally on the same axis.
  • an output shaft 15 driven by the motor 1 via the transmission is mounted in the motor housing 2, the end of which protrudes laterally and carries a second toothed pulley 16.
  • a belt 17, preferably a flat toothed belt, is stretched over both belt wheels 14, 16.
  • the belt drive 14, 16, 17 ensures the transmission of the motor power to the belt roller 10.
  • the lower part 3 has a lateral slot 18 through which a plastic insert plate 19 shown in FIGS. 2 and 3 projects with its actuating handle 20 .
  • FIG. 2 shows a top view of the upper side of the tape running case 7 facing the lower part 3.
  • the contact surfaces 21 to 23 are somewhat raised compared to the parting line 9, that is to say they protrude somewhat into the motor housing 2.
  • the support surfaces 21 to 23 are also mounted exactly opposite, but are not shown in the drawing.
  • Two of the contact surfaces 21, 22 each form an annular surface around screw holes 24 for the screws 8.
  • the third contact surface 23 lies in the line of alignment between the axes of the belt wheels 14, 16. Like the other contact surfaces 21, 22, it has only a relatively small extent on the order of a square centimeter.
  • two further screw holes 25 are shown in FIG. 2, which are also used to fasten the tape running case 7 to the motor housing 2.
  • Belt wheels 14, 16 and actuating handle 20 are covered by a cover 26 during operation.
  • the insert plate 19, which can be inserted loosely, is elongated and has a lateral arm 28 which extends towards the bearing surface 23.
  • a lateral arm 28 which extends towards the bearing surface 23.
  • elongated part there are 24 elongated holes 29 for inserting the screws 8 at the screw holes 24.
  • Three different levels 31, 32, 33 are formed along the elongated holes 29, so that the material thickness of the insert plate 19 is three different by approximately 0.2 mm assumes different values.
  • the same steps 31, 32, 33 are attached to the end of the arm 28. It can be seen from FIG. 3 that the flattest steps 31 are each further away from the actuating handle 20 than the highest steps 33.
  • the insert plate 19 is inserted so that the lowest levels 31 rest on the bearing surfaces 21 to 23.
  • the shortest distance between the motor housing 2 and the belt runner 7 can thus be fixed.
  • the push-through dimension of the belt 17 is checked before the screws 8 are finally tightened with the motor housing 2 firmly resting on the belt runner 7. If it can be pushed too hard, the insert plate 19 is pushed inward on the actuating handle 20 by one step. Then the steps 32 rest on the contact surfaces 21 to 23. If the belt tension is still too low, the insert plate 19 can be pushed in one more step. The greatest possible distance between the belt wheels 14, 16 is thus achieved.
  • the screws 8 are tightened firmly and the housing cap is placed on the upper part 4 and handle 5, with which the screws 8 are covered. Then the cover 26 is placed on the side, which covers the belt drive and the actuating handle 20. A later unintentional adjustment of the belt tension is excluded.

Abstract

A belt grinder has a motor housing (2) and a belt running box (7) beneath it in which the grinding belt runs. The grinding belt is driven via a belt (17) and belt pulleys (14, 16). Owing to manufacturing tolerances it must be possible to adjust the belt tension with the device already assembled in a simple manner. This is done by means of an insertion plate (19) which is movably fitted in a slot (18) between the motor housing (2) and the belt running box (7). The insertion plate (19) has steps (31-33) of different height which determine the distance between the motor housing (2) and the belt running box (7) and hence the belt tension

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einem Bandschleifer nach dem Oberbegriff des Anspruchs 1. Aus der US-A-2 544 810 ist ein derartiger Bandschleifer bekannt. Aus der DE 37 15 292 A1 ist ein Bandschleifer bekannt, bei dem sowohl die Motorwelle als auch die angetriebene Bandwalze je eine Riemenscheibe tragen. Der Abstand der Riemenscheiben ist konstruktiv festgelegt. Damit ist aber die Spannung des darüber gespannten Riemens nachträglich nicht korrigierbar. Wenn der Riemen zu fest gespannt ist, verringert dies die Leistung des Bandschleifers und kann zu vorzeitigem Verschleiß an Lagern und Riemen führen. Ein zu schwach gespannter Riemen verschleißt ebenfalls schneller, führt zu Schlupf und ruft häufig störend laute Laufgeräusche hervor.The invention is based on a belt sander according to the preamble of claim 1. Such a belt sander is known from US-A-2 544 810. From DE 37 15 292 A1 a belt sander is known in which both the motor shaft and the driven belt roller each carry a pulley. The distance between the pulleys is determined by the design. However, the tension of the belt stretched over it cannot subsequently be corrected. If the belt is too tight, this will reduce the performance of the belt sander and can lead to premature wear on the bearings and belts. A belt that is too weakly tensioned also wears out more quickly, leads to slippage and often causes annoying loud running noises.

Vorteile der ErfindungAdvantages of the invention

Der erfindungsgemäße Bandschleifer mit den kennzeichnenden Merkmalen des Anspruchs 1 hat demgegenüber den Vorteil, daß die Riemenspannung sich bei bereits montiertem Gerät auf einfache Weise einstellen läßt. Damit lassen sich sowohl Fertigungstoleranzen an Motorgehäuse und Bandlaufkasten bzw. der Lagerung von Abtriebswelle und Bandwalze als auch Längentoleranzen des Riemens selbst ausgleichen.The belt sander according to the invention with the characterizing features of claim 1 has the advantage that the belt tension can be easily adjusted with the device already installed. This can be used to compensate for manufacturing tolerances on the motor housing and belt runner or the bearing of the output shaft and belt roller as well as length tolerances for the belt itself.

Gemäß der Patentschrift US-A-2 544 810 ist ein Bandschleifer bekannt, der einen Bandlaufkasten besitzt, in dem ein über Bandwalzen geführtes Schleifband umläuft, mit einem auf den Bandlaufkasten aufgesetzten und mit diesem vorzugsweise durch Schrauben verbindbaren Motorgehäuse sowie mit einem Riemenräder und einem Riemen zur Übertragung des Motordrehmoments auf eine der Bandwalzen aufweisenden Riementrieb. Der Bandschleifer weist bei aufgezogenem Riemen zwischen Motorgehäuse und Bandlaufkasten wirkende Mittel zum Einstellen des die Riemenspannung bestimmenden Abstands zwischen den Riemenrädern auf. Diese Mittel sind nur mit einem Schraubwerkzeug umständlich und zeitaufwendig einstellbar.According to the patent specification US-A-2 544 810, a belt sander is known which has a belt running box in which a grinding belt guided over belt rollers rotates, with a motor housing placed on the belt running box and preferably connectable to it by screws, and with a belt pulley and a belt for transferring the engine torque to a belt drive having the belt rollers. When the belt is pulled between the motor housing and the belt runner, the belt sander has means which act to adjust the distance between the belt wheels which determines the belt tension. These means are cumbersome and time-consuming to set only with a screwing tool.

Besonders vorteilhaft ist es, als Mittel zum Einstellen der Bandspannung eine flache Einlageplatte mit verschieden hohen Stufen vorzusehen. Diese wird vorteilhafterweise im Bereich des Riemens zwischen Motorgehäuse und Bandlaufkasten verschieblich eingelegt. Die Stufen haben den Vorteil, daß durch einfaches Verschieben der Einlageplatte in Richtung der Trennfuge zwischen Motorgehäuse und Bandlaufkasten der Abstand der beiden Teile variierbar ist.It is particularly advantageous to provide a flat insert plate with different levels as a means of adjusting the belt tension. This is advantageously slidably inserted in the area of the belt between the motor housing and the belt run box. The steps have the advantage that the distance between the two parts can be varied by simply moving the insert plate in the direction of the joint between the motor housing and the belt run box.

Durch die in den abhängigen Ansprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen des im Anspruch 1 angegebenen Bandschleifers möglich. Ein Handhabungsfortsatz ist in jeder Stellung von außen zu erreichen und wird nach dem Einstellen durch die Abdeckhaube des Riementriebs überdeckt.The measures listed in the dependent claims allow advantageous developments and improvements of the belt sander specified in claim 1. A handling extension can be reached from the outside in any position and is covered by the cover of the belt drive after adjustment.

Zeichnungdrawing

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und in der nachfolgenden Beschreibung erläutert. Figur 1 zeigt eine perspaktivische Ansicht, Figur 2 zeigt eine Draufsicht auf den Bandlaufkasten bei abgenommenem Motorgehäuse und Figur 3 zeigt eine perspektivische Ansicht einer Einlageplatte.An embodiment of the invention is shown in the drawing and explained in the following description. FIG. 1 shows a perspective view, FIG. 2 shows a top view of the tape drive box with the motor housing removed, and FIG. 3 shows a perspective view of an insert plate.

Beschreibung des AusführungsbeispielsDescription of the embodiment

Ein handgeführter Bandschleifer weist ein zweiteiliges, einen Motor und ein Getriebe aufnehmendes Motorgehäuse 2 aus Kunststoff mit einem Unterteil 3 und einem Oberteil 4 auf. An das Unterteil 3 ist ein Handgriff 5 mit Schalter 6 angeformt. In Figur 1 ist eine den Schalter 6 und einen Teil des Oberteils 4 abdeckende Gehäusekappe abgenommen und nicht gezeigt. Das Motorgehäuse 2 ist auf einen Bandlaufkasten 7 aus Aluminium aufgesetzt und mit diesem mittels Schrauben 8 verschraubt. Mit 9 ist die etwa waagrecht verlaufende Trennfuge zwischen Motorgehäuse 2 und Bandlaufkasten 7 bezeichnet.A hand-held belt sander has a two-part motor housing 2 made of plastic with a lower part 3 and an upper part 4 which accommodates a motor and a transmission. A handle 5 with a switch 6 is molded onto the lower part 3. In Figure 1, a housing cap covering the switch 6 and part of the upper part 4 is removed and not shown. The motor housing 2 is placed on a belt conveyor box 7 made of aluminum and screwed to it by means of screws 8. 9 with the approximately horizontal parting line between the motor housing 2 and the belt runner 7 is designated.

In dem Bandlaufkasten 7 läuft ein über zwei Bandwalzen 10, 11 geführtes Schleifband um. Eine der Bandwalzen 10 ist mit einem gleichachsig seitlich hervorstehenden ersten verzahnten Riemenrad 14 drehfest verbunden.A sanding belt guided over two belt rollers 10, 11 rotates in the belt conveyor box 7. One of the belt rollers 10 is connected in a rotationally fixed manner to a first toothed belt wheel 14 which projects laterally on the same axis.

Etwa senkrecht über dem Riemenrad 14 ist im Motorgehäuse 2 eine vom Motor 1 über das Getriebe angetriebene Abtriebwelle 15 gelagert, deren Ende seitlich hervorsteht und ein zweites verzahntes Riemenrad 16 trägt. Über beide Riemenräder 14, 16 ist ein Riemen 17, vorzugsweise ein flacher Zahnriemen, gespannt. Der Riementrieb 14, 16, 17 sorgt für die Übertragung der Motorkraft auf die Bandwalze 10. Im Bereich des Riementriebs weist das Unterteil 3 einen seitlichen Schlitz 18 auf, durch den eine in Figuren 2 und 3 gezeigte Einlageplatte 19 aus Kunststoff mit ihrem Betätigungsgriff 20 hindurchragt.Approximately vertically above the pulley 14, an output shaft 15 driven by the motor 1 via the transmission is mounted in the motor housing 2, the end of which protrudes laterally and carries a second toothed pulley 16. A belt 17, preferably a flat toothed belt, is stretched over both belt wheels 14, 16. The belt drive 14, 16, 17 ensures the transmission of the motor power to the belt roller 10. In the area of the belt drive, the lower part 3 has a lateral slot 18 through which a plastic insert plate 19 shown in FIGS. 2 and 3 projects with its actuating handle 20 .

In Figur 2 ist in einer Draufsicht die dem Unterteil 3 zugewandte Oberseite des Bandlaufkastens 7 gezeigt. Dort sind drei in einer Ebene liegende Auflageflächen 21, 22, 23 für die Einlageplatte 18 gezeigt. Die Auflageflächen 21 bis 23 sind gegenüber der Trennfuge 9 etwas erhöht, ragen also etwas in das Motorgehäuse 2 hinein. Im Unterteil 3 sind den Auflageflächen 21 bis 23 genau gegenüberliegend ebenfalls Auflageflächen angebracht, die in der Zeichnung jedoch nicht gezeigt sind. Zwei von den Auflageflächen 21, 22 bilden je eine Ringfläche um Schraublöcher 24 für die Schrauben 8. Die dritte Auflagefläche 23 liegt in der Fluchtlinie zwischen den Achsen der Riemenräder 14, 16. Sie weist wie die übrigen Auflageflächen 21, 22 nur eine relativ geringe Ausdehnung in der Größenordnung eines Quadratzentimeters auf. Neben den Schraublöchern 24 sind in Figur 2 noch zwei weitere Schraublöcher 25 gezeigt, die ebenfalls der Befestigung des Bandlaufkastens 7 am Motorgehäuse 2 dienen. Riemenräder 14, 16 und Betätigungsgriff 20 sind während des Betriebs durch eine Abdeckhaube 26 verdeckt.FIG. 2 shows a top view of the upper side of the tape running case 7 facing the lower part 3. There are three bearing surfaces 21, 22, 23 lying in one plane for the insert plate 18. The contact surfaces 21 to 23 are somewhat raised compared to the parting line 9, that is to say they protrude somewhat into the motor housing 2. In the lower part 3, the support surfaces 21 to 23 are also mounted exactly opposite, but are not shown in the drawing. Two of the contact surfaces 21, 22 each form an annular surface around screw holes 24 for the screws 8. The third contact surface 23 lies in the line of alignment between the axes of the belt wheels 14, 16. Like the other contact surfaces 21, 22, it has only a relatively small extent on the order of a square centimeter. In addition to the screw holes 24, two further screw holes 25 are shown in FIG. 2, which are also used to fasten the tape running case 7 to the motor housing 2. Belt wheels 14, 16 and actuating handle 20 are covered by a cover 26 during operation.

Die lose einlegbare Einlageplatte 19 ist länglich ausgebildet und weist einen seitlichen Arm 28 auf, der zu der Auflagefläche 23 hin reicht. Im länglichen Teil befinden sich bei den Schraublöchern 24 Langlöcher 29 zum Durchstecken der Schrauben 8. Entlang den Langlöchern 29 sind jeweils drei verschieden hohe Stufen 31, 32, 33 ausgebildet, so daß die Materialstärke der Einlageplatte 19 drei verschiedene sich um jeweils etwa 0,2 mm unterscheidende Werte annimmt. Dieselben Stufen 31, 32, 33 sind am Ende des Arms 28 angebracht. Aus Figur 3 ist ersichtlich, daß die flachsten Stufen 31 jeweils vom Betätigungsgriff 20 weiter entfernt liegen als die höchsten Stufen 33.The insert plate 19, which can be inserted loosely, is elongated and has a lateral arm 28 which extends towards the bearing surface 23. In the elongated part there are 24 elongated holes 29 for inserting the screws 8 at the screw holes 24. Three different levels 31, 32, 33 are formed along the elongated holes 29, so that the material thickness of the insert plate 19 is three different by approximately 0.2 mm assumes different values. The same steps 31, 32, 33 are attached to the end of the arm 28. It can be seen from FIG. 3 that the flattest steps 31 are each further away from the actuating handle 20 than the highest steps 33.

In Figur 2 ist die Einlageplatte 19 so eingelegt, daß jeweils die niedrigsten Stufen 31 an den Auflageflächen 21 bis 23 anliegen. Damit ist der kürzeste Abstand zwischen Motorgehäuse 2 und Bandlaufkasten 7 fixierbar. Bei der Endmontage des Bandschleifers wird vor dem endgültigen Anziehen der Schrauben 8 bei fest auf dem Bandlaufkasten 7 aufliegenden Motorgehäuse 2 das Durchdrückmaß des Riemens 17 geprüft. Läßt er sich zu stark durchdrücken, wird die Einlageplatte 19 an dem Betätigungsgriff 20 um eine Stufe weiter nach innen geschoben. Dann liegen die Stufen 32 an den Anlageflächen 21 bis 23 an. Ist die Riemenspannung immernoch zu gering, kann die Einlegeplatte 19 nochmals um eine Stufe weiter hineingeschoben werden. Damit wird der größt mögliche Abstand zwischen den Riemenrädern 14, 16 erreicht. Nach dem Einstellen der richtigen Riemenspannung werden die Schrauben 8 fest angezogen und die Gehäusekappe auf Oberteil 4 und Handgriff 5 aufgesetzt, womit die Schrauben 8 verdeckt sind. Danach wird seitlich die Abdeckhaube 26 aufgesteckt, die den Riementrieb und den Betätigungsgriff 20 überdeckt. Ein späteres unbeabsichtigtes Verstellen der Riemenspannung ist damit ausgeschlossen.In Figure 2, the insert plate 19 is inserted so that the lowest levels 31 rest on the bearing surfaces 21 to 23. The shortest distance between the motor housing 2 and the belt runner 7 can thus be fixed. During the final assembly of the belt sander, the push-through dimension of the belt 17 is checked before the screws 8 are finally tightened with the motor housing 2 firmly resting on the belt runner 7. If it can be pushed too hard, the insert plate 19 is pushed inward on the actuating handle 20 by one step. Then the steps 32 rest on the contact surfaces 21 to 23. If the belt tension is still too low, the insert plate 19 can be pushed in one more step. The greatest possible distance between the belt wheels 14, 16 is thus achieved. After setting the correct belt tension, the screws 8 are tightened firmly and the housing cap is placed on the upper part 4 and handle 5, with which the screws 8 are covered. Then the cover 26 is placed on the side, which covers the belt drive and the actuating handle 20. A later unintentional adjustment of the belt tension is excluded.

Claims (5)

  1. Belt grinder having a belt box (7) in which an abrasive belt (12) which is guided over belt rollers (10, 11) circulates, having a motor housing (2) which is positioned on the belt box (7) and can be connected thereto preferably by means of screws, and having a belt drive which has belt wheels (14, 16) and a belt (17) for transmitting the motor torque to one of the belt rollers (10), the belt grinder having means which, when the belt (17) has been fitted, acts between the motor housing (2) and belt box (7) for setting the distance between the belt wheels (14, 16) which determines the belt tensioning, characterized in that the means (19) are designed as an insert plate (19) which has steps (31 to 33) of different heights and is inserted displaceably between the motor housing (2) and belt box (7).
  2. Belt grinder according to Claim 1, characterized in that the insert plate (7) has slots (29) for the through-passage of screws (8).
  3. Belt grinder according to one of the preceding claims, characterized in that the motor housing (2) and belt box (7) have planar bearing surfaces (23) which are located opposite one another approximately on the line of alignment between the axes of the belt wheels (14, 16).
  4. Belt grinder according to one of the preceding claims, characterized in that (preferably a number of) the steps (31 to 33) of the insert plate (19) comes to rest against the bearing surfaces (21 to 23) between the motor housing (2) and the belt box (7).
  5. Belt grinder according to one of the preceding claims, characterized in that the insert plate (19) has an actuating grip (20) which projects laterally out of the motor housing (2) or the belt box (7) in the region of the belt drive.
EP93914614A 1992-08-08 1993-07-08 Belt grinder Expired - Lifetime EP0653973B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE9210599U DE9210599U1 (en) 1992-08-08 1992-08-08 Belt sander
DE9210599U 1992-08-08
PCT/DE1993/000609 WO1994003308A1 (en) 1992-08-08 1993-07-08 Belt grinder

Publications (2)

Publication Number Publication Date
EP0653973A1 EP0653973A1 (en) 1995-05-24
EP0653973B1 true EP0653973B1 (en) 1997-03-05

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP93914614A Expired - Lifetime EP0653973B1 (en) 1992-08-08 1993-07-08 Belt grinder

Country Status (4)

Country Link
US (1) US5545077A (en)
EP (1) EP0653973B1 (en)
DE (2) DE9210599U1 (en)
WO (1) WO1994003308A1 (en)

Cited By (2)

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Publication number Priority date Publication date Assignee Title
US6785300B2 (en) 1997-02-06 2004-08-31 At&T Wireless Services, Inc. Delay compensation
US7983217B2 (en) 1997-02-06 2011-07-19 At&T Mobility Ii Llc Method for frequency division duplex communications

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DE19544662A1 (en) * 1995-11-30 1997-06-05 Rieter Automatik Gmbh Melt spinning spinneret - has structured blower jet outlet directed at extruded filaments and induction heating at the spinneret packet
US6643281B1 (en) 1998-03-05 2003-11-04 At&T Wireless Services, Inc. Synchronization preamble method for OFDM waveforms in a communications system
DE19937014A1 (en) 1999-08-05 2001-02-08 Bosch Gmbh Robert Hand belt grinder
EP1604781B1 (en) * 2004-06-07 2008-01-02 BLACK & DECKER INC. Belt sander
DE102007004521A1 (en) * 2007-01-24 2008-07-31 Thyssenkrupp Presta Steertec Gmbh Electric power steering with belt drive
US20080194187A1 (en) * 2007-02-08 2008-08-14 Alto U.S. Inc. Elastic drive belt assembly
USD874205S1 (en) * 2018-03-27 2020-02-04 Gideon Williams Duvall Beverage brewing machine external surface belt configuration

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US2544810A (en) * 1948-04-30 1951-03-13 Edwin J Strandberg Sanding and polishing attachment for electric handsaw supporting and driving units
US2576745A (en) * 1949-09-30 1951-11-27 Howard L Auten Machine for buffing, sanding, and the like
AT172967B (en) * 1950-02-18 1952-11-10 Elviro Lombardi Hand sanding machine for flat and curved surfaces, especially for working on wood
US4334390A (en) * 1980-09-24 1982-06-15 The Singer Company Belt sander
US4642943A (en) * 1985-11-21 1987-02-17 Taylor Jr Joseph R Belt abrading apparatus and method
US5185963A (en) * 1992-04-08 1993-02-16 Timesavers, Inc. Pivotal arm belt loading device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6785300B2 (en) 1997-02-06 2004-08-31 At&T Wireless Services, Inc. Delay compensation
US7983217B2 (en) 1997-02-06 2011-07-19 At&T Mobility Ii Llc Method for frequency division duplex communications
US8305990B2 (en) 1997-02-06 2012-11-06 At&T Mobility Ii Llc Method for frequency division duplex communications
US8693432B2 (en) 1997-02-06 2014-04-08 At&T Mobility Ii Llc Method for frequency division duplex communications
US9088388B2 (en) 1997-02-06 2015-07-21 At&T Mobility Ii Llc Method for frequency division duplex communications

Also Published As

Publication number Publication date
DE59305655D1 (en) 1997-04-10
DE9210599U1 (en) 1993-12-09
US5545077A (en) 1996-08-13
EP0653973A1 (en) 1995-05-24
WO1994003308A1 (en) 1994-02-17

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