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Publication numberUS2625063 A
Publication typeGrant
Publication dateJan 13, 1953
Filing dateFeb 25, 1952
Priority dateFeb 25, 1952
Publication numberUS 2625063 A, US 2625063A, US-A-2625063, US2625063 A, US2625063A
InventorsAndrew E Hanson
Original AssigneeAndrew E Hanson
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Electric drill holder and work clamp
US 2625063 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)


Application February 25, 1952, Serial No. 273,245

, 8 Claims. 1

The present invention is directed to, and it is an object to provide, a novel device adapted to support a portable or hand-type electric drill from the work, with the twist drill in proper alinement with the drilling point, and for forceful engagement with said work.

Another important object of this invention is to provide a drill holder and work clamp which includes a novel clamping unit which is operative to automatically clamp the holder in fixed position on the work in response to the application by a hand lever of drilling pressure on the drill.

An additional object of this invention is to provide a drill holder and work clamp, as in the preceding paragraph, wherein said clamping unit is comprised of a fixed jaw and a movable jaw adapted to engage opposite faces of the work, the movable jaw being actuated toward the fixed jaw in work clamping relation in response to the force exerted by one end of the hand lever which is v jaw.

employed to thrust the drill toward said work;

the jaws being secured in assembly and actuated from said lever in a novel manner.

A further object of the invention is to provide novel means for readily attaching a portable electric drill to said drill holder and work clamp.

A still further object of the invention is to provide a practical, reliable, and durable electric drill holder and work clamp, and one which will be exceedingly effective for the purpose for which it is designed.

- These objects are accomplished by means of such structure and relative arrangement of parts as will fully appear by a perusal of the following specification and claims.

In the drawings:

Fig. 1 is a side elevation of the drill holder and work clamp as in use.

Fig. 2 is a fragmentary outer end view, showing particularly the clamping unit.

Fig. 3 is a fragmentary side elevation showing a modification of the clamping unit, especially designed for thick work. Referring now more particularly to the characters of reference on the drawings, and at present to the embodiment of Figs. 1 and 2, the novel, drill holder and work clamp comprises a work engaging clamping unit, indicated generally at I, and adapted to clampingly engage from one edge on the work 2 to be drilled.

The clamping unit I includes a jaw body 3 comprised of transversely spaced, upstanding side plates 4 connected at the front and in the upper half by a filler block 5.

The lower portion of the jaw body 3 is formed as an inwardly opening, generally C-shaped fixed jaw 6; the lowerand inner-portion of said'fixed It will thus be recognized that with the work 2 engaged at one edge portion in said throat of the fixed jaw 6, upward swinging of the outer end of the movable jaw 9 will cause the eccentric working edge H to move downwardly in clamping engagement with the work.

To assure of effective engagement with work varying slightly in thickness, the screw 8 is provided for adjustment of the effective range of the jaw assembly.

A slide plate I2 is disposed between th side plates 4 of the jaw body 3 above the movable jaw 9; said slide plate 12 being guided for straight-line motion lengthwise of the jaw body 3 by means of spaced cross pins I3 through said body 3 with such pins running in a longitudinal slot [4 in the slide plate I2.

The adjacent outer corner of the slide plate l2 and adjacent end of the movable jaw 9 are links connected, as at l5, with the pivots indicated at I6.

At the end remote from the jaw body 3 the slide plate I2 is coupled to the adjacent end of an upstanding post I! by means of a longitudinalaxis swivel connection l8.

A handle 'I 9 is adjustably pivotally connected to the post I1, asat 20, and thence extends laterally inwardly in overhanging relation to the work 2, and an attachment sleeve 2| is adjustably secured on said handle by a locking screw 22. 1

On the under side the attachment sleeve 2| is pivotally connected, as at 23, to a clamp 24 engaged in holding relation about the grip 25 of a portable electric drill 26 which includes a chuck 21 adapted to hold the twist drill 28 for engagement with the work 2.

When the described drill holder and work clamp is in position to use, as in Fig. 1, downward motion on the outer end of the handle 19 causes the twist drill 28 to be forcefully thrust into en'- gagement with the work 2 for eifective drilling, and at the same time the inner end of said handle [9 tends to swing upwardly about the pivot 23 as an axis. This exerts a pull in a corresponding direction on the post I1, and such pullin motion, as transmitted by the links 15, swings the mov- 3 able jaw 9automaticallyso that the work 2 is effectively clamped between the screw 8 of the fixed jaw 6 and said movable jaw 9.

With the device thus used the portable electric drill 21' is not only effectively supported and stabilized, but a relatively great thrust is imparted to the twist drill 28, as is desirable for proper drilling operations.

The swivel connection l8 permits the handle I9 to be manually adjusted laterally to the right or left relative to the clamping .unit .I, and as setting of the drill may require.

Under certain circumstances it may be desired to lock the clamping unit I to the work .2, whether or not the handle be in use. Such locking is accomplished by a nut 29 welded to the outside of the filler block 5 at its innerend, with a screw 33 threaded through the nut 29 for adjustment longitudinally of the jaw body 3.. By running the screw 30 into engagement with the movable jaw 9, the jaw assembly can be caused to fixedly clamp the work 2.

In Fig. 3 the drill holder and work clamp is shown as modified for engagement with relative thick work 3|. Here the jaw body 32, at the upper portion thereof, is constructed as before, and carries the pivotally mounted movable jaw 33 actuated by linkage 34 from a slide plate 35.

Here, however, the fixed jaw unit, indicated generally at 35, is comprised of a shank 31 which depends from the body 32; said shank being rectangular in cross section and formed at its lower end with a stop head 38. The lower jaw part .39 is included in a slide 49 which runs on the shank 31, being held in selective position of adjustment by a pawl 4| on the slide cooperating with a rack 42 on the shank.

A nut 43 and adjustment screw 44 complete the lower jaw part 39.

In the above described modified embodiment of the invention, the C-shaped jaw unit 36 is normally fixed, being used in the same manner as in the embodiment in Fig. 1, except that the opening or throat of said jaw unit may be varied by adjustment of the slide on the shank 31,

The described drill holder, in both of its embodiments, provides a device whereby a portable electric drill can be used with greater convenience and facility than otherwise; the twist drill 28 being more easily maintained on the drilling point, and much greater drillin pressure being exerted.

From the foregoing description it will be readily seen that there has been produced such a device as substantially fulfills the objects of the invention, asset forth herein.

While this specification sets forth in detail the present and preferred construction of the device, still in practice such deviations from such detail may be resorted to as do not form a departure from the spirit. of the invention, as defined by the appended claims.

Having thus described the invention, the fol lowing is claimed as new and useful, and upon which Letters Patent are desired:

1. An electric drill holder and work clamp comprising-a jaw body having a laterally projecting fixed jaw adapted to engage under the work from one edge thereof, a laterally projecting movable jaw pivoted on the body for swin ing to engage on the work opposite the fixed jaw, a slide member mounted on the jaw bad for motion away from the movable jaw and the work, linkage between said slide member and movable jaw operative to so swing the latter upon such motion of said member, a post secured to the slide member projecting away from the work, a hand lever pivoted to and projecting laterally from the post overhanging the work, and means adapted to attach the hand lever to a portable electric drill with the latter extending toward said work.

2. An electric drill, as in claim 1, including a longitudinal axis swivel connection securing the post to the slide member.

3. An electric drill holder and work clamp, as in claim 1, in which the jaw body includes an elongated shank extending from the body in a direction opposite the post, a slide on said shank, and means to adjust the position of the slide on said shank; the fixed jaw being carried by said slide.

4. An electric drill holder and work clamp, as in claim .3, including a pawl and ratchet connection between the slide and shank.

5. An electric drill holder and work clamp comprising a jaw body having a generally 0- shaped fixed jaw opening laterally, a movable jaw pivoted intermediate its ends on the jaw body for motion at one end into the C-shaped fixed jaw whereby to clamp work disposed therea slide member mounted on the jaw body beyond and for motion in a direction away from the movable jaw and the work, actuating linkage between the slide member and movable jaw operative to cause the latter to move in a work clamping direction upon the slide member .moving away from the work, a post secured to the slide member projecting away from the work, a hand lever pivoted to and projecting laterally from the post overhanging the work, and means adapted to attach the hand lever to a portable electric drill with the latter extending toward said work.

6. An electric drill holder and work clamp, as in claim 5, in which the jaw body includes spaced side plates, the movable jaw and slide member being disposed therebetween, said member being a flat plate having a longitudinal slot therein, and spaced cross pins between the side plates engaging through the slot.

'7. An electric drill holder and work clamp, as in claim 6, including a longitudinal filler block between a portion of said side plates; and one edge of the flat slide member plate bearing in guided, relation on said filler block.

8. An electric drill holder and work clamp comprising a clamping unit adapted to engage the work and including a movable jaw, a post projecting away from the work, a hand lever pivoted to the post and extending laterally therefrom for swinging in a direction toward the work, means to attach the lever to a drill, means securing the inner end of the post in connection with the clamping unit for longitudinal movement of the post away from the work, and means between the post and movable jaw and responsive to such movement f the post to actuate said movable jaw in a work clamping direction.


REFERENCES CITED UNITED STATES PATENTS Name Date Cook June 10, 1930 Number 1,736,552

Patent Citations
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US1736552 *Apr 14, 1928Nov 19, 1929Isador ShulmanEducational game
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2879677 *Oct 25, 1957Mar 31, 1959Baublitz Merritt HSupporting and operating device for drills and the like
US4136579 *Jan 24, 1977Jan 30, 1979Robinson Merle WForce lever attachment for hand tools
US4307956 *May 24, 1979Dec 29, 1981Tom KimGraphic art correction stylus
US4442905 *Aug 6, 1981Apr 17, 1984Agoston Edward EJig assembly for drilling vertically upward
US4494895 *Feb 7, 1983Jan 22, 1985Leaf Arthur LPortable drill press mechanism
US4585376 *May 14, 1984Apr 29, 1986Davenport Sr William RSafe lock drilling apparatus
US4669929 *Jan 10, 1986Jun 2, 1987Olesen Karl RJoist drill
US5785467 *Jul 2, 1996Jul 28, 1998Gardner; Dale W.Lever bar machining apparatus
US5863160 *Nov 6, 1997Jan 26, 1999Havener; Dennis J.Portable tool guide
US6494650 *Feb 2, 2001Dec 17, 2002William A. MaeckerLeverage accessory for power drills
US7140813 *Jul 15, 2003Nov 28, 2006Tucker Bradley JLine boring machine
US7641424Aug 24, 2005Jan 5, 2010Allen Ip, IncorporatedNon-pneumatic clamp and drilling system
US7811033May 22, 2008Oct 12, 2010Allen Ip, IncorporatedTool with remote switch
USRE44289May 20, 2010Jun 11, 2013Allen Ip Inc.Pocket hole drilling machine
U.S. Classification408/95, 408/712
International ClassificationB25H1/00, B23B45/14
Cooperative ClassificationB25H1/0064, B25H1/0057, Y10S408/712
European ClassificationB25H1/00C4, B25H1/00C4B