Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS2640304 A
Publication typeGrant
Publication dateJun 2, 1953
Filing dateApr 1, 1952
Priority dateApr 1, 1952
Publication numberUS 2640304 A, US 2640304A, US-A-2640304, US2640304 A, US2640304A
InventorsJames Mcewan
Original AssigneeJames Mcewan
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Belt grinder
US 2640304 A
Images(3)
Previous page
Next page
Description  (OCR text may contain errors)

J. M EWAN BELT GRINDER June 2, 1953 5 Sheets-Sheet 1 Filed April 1, 1952 INVENTOR. .Awz: Mfw/w Juhe 2, 1953 J. MOEWAN 2,640,304

BELT GRINDER Filed April 1, 1952 3 Sheets-Sheet 2 INVENTOR. J4!!! Mfwmv June 2, 1953 McEwAN 2,640,304

BELT GRINDER I Filed April 1, 1952 3 Shee'ts-Sheet 5 INVEN TOR.

Y 71 mdm Patented June 2, 1953 UNITED STAT ES PAT ENT 2,640,304

BELT GRINDER;

James: McEwan, SamJose, Galif.

Application April 1,1952, No; 279,787

scrum; t

invention: relates to belt grinders and more particularly to improvements tlireizeini which enable; ease of use. and adjustment:

The; principal object. at the invention is to. provide an; improved belt grinder construotioni in. which; tension. of' the" belt can be. relieved with-- out distlrcbing: any adjustment. Another ob loci: of the. invention is; to provide am improved. grinder whichv is constructed for operation. and? erorunmiof manufacture.

Gillie]: objects. advantages of the invena tion will; become apparent: from the; following description of certain preferred embodiments thereof, taken in connection with the accoml it drawings, in which:

1. is a. side elevational View oi the grinder;

Fig. 2 islaiv crticazl' secidonaliviem of the. grinder.

Fi 3 is; a, borizontala sectional: View" taken; in a plane indicated by the line 3-.--3 in Figure a Fig. 4; is: a sectional: view: taken a. plane dicated, by the: line 4-4; Eigtnze: 33..

Figs 5' is a. sectional view as indicated by the line: 5i--5r 4..

Fig. 6 isv a plan View; of; a, modified form of: the invention.

Referring to Eigures 1,. 2. 3,. the grinder includes: a base t0: carrying: a post bl: atztheupper end of which a. frames [2; is. adjustably clamped by bolt I15, The: frame t2 carries: at.

its: front end. a. boss: F13 which a shaft: W is.

journaled to support a drive pulley E6; The shaft. M: has a. conventional V-belt drive I! to a motor I8 suitably mounted on the post II. A grinding belt: 2:! is trained about; the drive pulley It and. an. idler pulley 22,..whose mounting is referred to hereinafter, The belt 2|. has. its upper stretch supported a work. table 23 adiustabIy clamped onthe main frame I12. at 24. A work opening above the table. 23 is provided in an upper housing member-26 which is; hinged at 2-! to a. lower housing member 28 which is secured on the frame [2. The housing; member 26' is adjustably clamped in position by a hand nut 29-. A door- 3lishinged at 32 to the. 110118;- ing member 26 to close its work' opening; as lustrated Figure 1'.

Formed integrally with the lower housing member 28 is an inlet housing 33 for a conventional blower 34 having its outlet directed into a bag 36. The blower 34 is also driven from the V-belt drive l1. Respective side doors 31 and 38 (Figure 1) are provided for the housing members 26-28 and housing 33, and are held in closed position by respective hand nuts 39.

The rear or idler pulley 22 (Figures 2 and 4) 2. is journaledl cm a stub shafit 4" which is secured: in an. upright poise 42 having a mount om a. 431 sen used; in: upright. ears.v 44 of a. base plate: 46.. A spring-4 is. disposed about the pin 43 between one arm of the yoke re and one I The; frame.- bracket: 51; is. secured; by suitable:

studs- 52 to.- the trame l2 The plate 4h has: a; pivotal: connection. provided; bya pivot 33 to: the bracket. 51, at. a. location below" and in: van-- tica'ls. alignment with; the axis of shaft 41,. for p ley- 22%, The plate: 43= also has respective arcuate slots: 54 concentric. with pivot. stud 53 and prosvid-ing for. adjustable; connection to the frame: brackets by means of studs- 56,, friction. washers: 5-1, and nuts 55. Each friction washer 51- is composed. of two. metal. washers with an inter-- posed. resilient washer 51d of rubber. or other similarmaterial. The. plate 46; (Figure 5): is provided with an apertured car 58; in which is journaled an adjusting rod 53 also threaded, in a. boss. a l at the frame bracket 51.. A. spring; 62: is interposed between the. boss 6t and. the; boss. 58 to. maintain the, adjusted positiom of the plate 4.6;. By turning hand knob 53, (Figure 3) on rod; 591 the. position. of, the plate 48; can. be. changed tosecure the desired pulley alignment.

Adjustable means. is provided to: place a doe sired tension on. the belt, 2| and to, enable release ofthe belt; 2|, fromthe idler pulley 22 with, out affecting; the tension adjustment: for. the. belt; E'or this purpose an adj usting, screw t6. (Figures. 3,, 4; and. 5.),v extends between the yoke, 42? and the pair. of upstanding ears. 6.? on the plate 45, the screw; 63 having threaded. engagement with a shaft 63. pivoted in the yoke. 42 and. passi'ng freely through. an apertured shaft. 69; extend ihg between the two ears 61. A spring H is compressed between the shaft 69 and the screw handle 12, urging the screw 66 to the right in Figures 3 and 5 and correspondingly urging the idler pulley 22 to maintain a desired belt tension. A stop nut 13 is provided on the screw 66 to engage a stub shaft 69 when no belt is on the pulleys.

It will be seen that by grasping the handle 48 the yoke 42 can be rocked counterclockwise as viewed in Figure to move the shaft 4! and the pulley 22 supported thereon out of engagement with the belt. This compresses the spring H but does not change its adjustment. Subsequently when the belt is properly aligned or when a new belt is in place, the tension adjustment is present without change.

In the modification of Figure 6 there is shown a pulley supporting and adjusting unit which can be placed at anydesired distance from a drive pulley where long grinding belts are employed. The unit shown in Figure 6 includes a frame plate 8| which is apertured at 82 for bolting to a work table, for example, and which includes a.

plate 48, a yoke 42, and an adjusting screw 66 identical in construction and mounting with those previously described in connection with Figures 1 through 5. The only difference from the former modification, other than the plate 8!, is in the adjustment for alignment of the pulley 22. A screw 83 is fixed in an ear 84 of plate 8| and passes through the apertured car 58. A hand nut 88 is threaded on the screw 83 for determining the adjusted position of the plate 46 and the pulley 22 on th frame plate 8|.

While I have shown and described certain preferred embodiments of the invention, it will be apparent that it is capable of further modification and. variation, so that its scope should be limited only by the proper scope of the claims appended hereto.

I claim:

1. In a belt grinder, a frame structure, a grinding belt, a drive pulley on said frame structure supporting on end of said belt, an idler pulley supporting the other end of said belt, a supportplate for said idler pulley, means mounting said support plate in a horizontal position on said frame structure for adjustment about a vertical axis, a yoke having a pivotal supporting connection with said plate and carrying a shaft supporting said idler pulley, the axes of said shaft and said pivotal connection being parallel, and adjusting screw having a threaded connection with said yoke and a slidable connection with said plate, a spring interposed between said plate and said screw and acting through said screw to urge said yoke in a direction to tension said belt, and a handle portion on said yoke for manual control thereof to move said idler pulley to and from engagement with said belt.

2. In a belt grinder, a frame structure, a grinding belt, a drive pulley on said frame structure supporting one end of said belt, an idler pulley supporting the other end of said belt, a support plat for said idler pulley, means mounting said support plate in a horizontal position on said frame structure for adjustment about a vertical axis intersecting said idler pulley, said mounting means also including a frictional connection between said plate and said frame structure, and an adjusting connection therebetween for effecting relative movement about said vertical axis, an operating member for said adjusting connection extending in a direction toward said drive pulley,

'4 a yoke having a pivotal supporting connection with said plate and carrying a shaft supporting said idler pulley, the axes of said shaft and said pivotal connection being parallel, an adjusting screw having a threaded connection with said yoke and a slidable connection with said plate, a spring interposed between said plate and said screw and acting through said screw to urge said yoke in a direction to tension said belt, and a handle portion on said yoke for manual control thereof to move said idler pulley to and from enagement with said belt.

3. In a belt grinder, a frame structure, a grinding belt, a drive pulley on said frame structure supporting one end of said belt, an idler pulley supporting the other end of said belt, a support plate for said idler pulley, means mounting said support plate in a horizontal position on said frame structure for adjustment about a vertical axis intersecting said idler pulley, said mounting means also including a frictiona1 connection between said plate and said frame structure, a yoke having a pivotal supporting connection with said plate and carrying a shaft supporting said idler pulley, the axes of said shaft and said pivotal connection being parallel, an adjusting screw having a threaded connection with said yoke and a slidable connection with said plate, a spring interposed between said plate and said screw and acting through said screw to urge said yoke in a direction to tension said belt, and a handle portion on said yoke for manual control thereof to move said idler pulley to and from'engagement with said belt.

4. In a belt grinder, belt supporting means including an idler pulley supporting the other end of said belt, a support plate for said idler pulley, means mounting said support plate in a horizontal position for adjustment about the vertical axis intersecting said pulley, a yoke having a pivotal supporting connection to said plate and carrying a shaft supporting said pulley, the axis of said shaft and said pivotal connection being parallel, an adjusting screw having a threaded connection with said yoke and slidably connected to said plate, a spring interposed between said plate and said screw and acting to urge said yoke in a direction to tension said belt, and a handle portion on said yoke for manual adjustment of said idler pulley to and from engagement with said belt.

JAMES MCEWAN.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,153,479 Beugler Sept. 14, 1915 1,821,624 Emmons Sept. 1, 1931 1,916,543 Welch July 4, 1933 2,055,351 Hormel Sept. 22, 1936 2,300,643 Bostwick et al Nov. 3, 1942 2,313,254 Mead Mar. 9, 1943 2,449,519 Sutton Sept. 14, 1948 2,489,811 Perkins Nov. 29, 1949 2,507,372 Emmons May 9, 1950

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1153479 *Oct 19, 1914Sep 14, 1915E & B Holmes Machinery CoSandpapering-machine.
US1821624 *Jun 26, 1926Sep 1, 1931Porter Cable Machine CoSandpapering machine
US1916543 *Jun 18, 1930Jul 4, 1933Welch George DPortable sander tool
US2055351 *Sep 19, 1935Sep 22, 1936Nat Standard CoGrinding machine
US2300643 *Aug 16, 1940Nov 3, 1942Wisconsin Chair CompanySanding mechanism
US2313254 *Apr 2, 1941Mar 9, 1943Mead Theodore ESanding device
US2449519 *Apr 8, 1946Sep 14, 1948Hammond Machinery Builders IncBelt tightening and tracking device
US2489811 *Mar 31, 1948Nov 29, 1949Hammond Machinery BuildersBelt polishing and grinding machine
US2507372 *May 23, 1946May 9, 1950Porter Cable Machine CoBelt grinding and polishing device
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2724934 *Jun 15, 1953Nov 29, 1955Sierra Machinery Co IncTilt belt grinder
US2891359 *Nov 29, 1956Jun 23, 1959Hulisz William WBelt sanding machines
US3136096 *Sep 27, 1960Jun 9, 1964Curtin Hebert Company IncBelt grinder
US3760538 *Nov 18, 1971Sep 25, 1973Solheim KSanding apparatus
US3889429 *Nov 1, 1973Jun 17, 1975Kimwood CorpResidue removal system for belt abrader
US4356750 *Nov 29, 1979Nov 2, 1982Benchmark Tool CompanyBand saw tension and tracking assembly
US6233831 *Aug 19, 1998May 22, 2001Kioritz CorporationDust collector-equipped power cutter
US6546631Dec 13, 2000Apr 15, 2003Kioritz CorporationEngine cutter
US8402873 *Dec 15, 2009Mar 26, 2013Ambrose BedelPallet dismantler
US20110138984 *Dec 15, 2009Jun 16, 2011Ambrose BedelPallet dismantler
DE1025752B *Nov 10, 1953Mar 6, 1958Bosch Gmbh RobertLeichtes, ortsbewegliches Bandschleifgeraet
DE102012017534A1 *Sep 5, 2012Mar 6, 2014Entstaubungsgeräte Pulsnitz GmbHSuction device for use in belt grinder for removing solid grinding particles from active location during grinding workpiece, has spark-particle-detection unit arranged on opposite side of belt, and suction ports attached to suction line
Classifications
U.S. Classification451/311, 451/456
International ClassificationB24B21/00
Cooperative ClassificationB24B21/00
European ClassificationB24B21/00