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Publication numberUS3102345 A
Publication typeGrant
Publication dateSep 3, 1963
Filing dateAug 10, 1961
Priority dateAug 10, 1961
Publication numberUS 3102345 A, US 3102345A, US-A-3102345, US3102345 A, US3102345A
InventorsHolland Donald W
Original AssigneeHolland Donald W
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Door frame square
US 3102345 A
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Description  (OCR text may contain errors)

D. W. HOLLAND DOOR` FRAME SQUARE Sept. 3, 1963 2 sheets-sheet i Filed Aug. 10, 1961 UW @y ATTORNEYS Sept. 3, 1963 D. w. HOLLAND DooR FRAME SQUARE 2 Sheets-Sheet 2 Filed Aug. lO. 1961 FIG. 5

INVENTOR. DONALD H. HOLLAND JW #/w ATTORNEYS United States Patent Oiiice 3,102,345 Patented Sept. 3, 1963 3,102,345 DUR FRAME SQUARE Donald W. Holland, 330 Bean St., Mora, Minn. Filed Aug. 11i, 1961, Ser. No. 130,528 4 Clmtms. (Cl. 33 194) This invention relates to improvements in door frame square for purpose of the provision of a device for setting and squaring finished door jambs. More particularly, this invention relates to an improved inexpensive door frane square that may be used conveniently by a carpenter in setting and placing a finished door jamb more rapidly with less expense and greater accuracy.

In prior devices intended for this purpose the operation of said devices do not provide for accurate placing of the door jambs while at the same time being of rela- .tively simple construction and also being readily usable for setting door jambs in doors of varying widths.

It is an object of this invention to provide an improved door frame square which is capable of temporarily supporting a complete door jamb very accurately when it is placed in a rough opening of wall, and which will permit the user thereof immediately to adjust the door frame square to the appropriate width of a door and then make a further iine adjustment to square the door jamb in the rough opening and firmly hold it while permitting fastening the door jamb rmly in place. j

It is another object of this invention to provide an improved door frame square which is strongly made and` eral doors are being placed and is capable of being used for setting doors of varying standard widths.

Another object of this invention includes the provision of a door frame square having cam adjustment members for making a tine adjustment to square the door jamb. It is still anotoher object of this invention to provide a door frame square having improved means for firmly holding the jamb head piece in place while permitting an adjustment for width of the door to square the jamb side pieces. t

Other objects of this invention include the provision of improved door frame square of exceedingly yet rugged and simplied construction and capable of being manufactured at a relatively low cost.

Other and further objects are those inherent in the apparatus as herein illustrated, described and claimed.

To the accomplishment of the foregoing and related ends this invention then comprises the features hereinafter fully described and particularly pointed out in the claims, the following description setting forth in detail certain illustrative embodiments of the invention, these being indicative, however, of but a few of the various ways in which the principles of the invention may be employed.

The invention is illustrated with reference to the drawings wherein:

FlGURE l is a vertical elevational view of the door frame square of this invention shown in a rough door opening and supporting a fitted door jamb in position for nailing the door jamb solidly to the rough opening, one f the side rails of the door frame square being shown in dotted line in position for supporting a door jamb for a door of a wider width than that illustrated in solid lines.

FIGURE 2 is a horizontal view, part in cross-section, taken along the line and looking in the direction of the arrows 2 2 of FIGURE l to better illustrate the construction of the members for holding the jamb side pieces in position. t

'FIGURE 3 is a fragmentary cross-sectional view taken along the line and in the direction of the arrows 3 3 of FIGURE l to more clearly illustrate the members permitting adjustment of the door frame lsquare for doors of different standard widths.

FIGURE 4 is a fragmentary cross-sectional View taken along the line and in the direction of the arrows 4 4 of FlGURE l to show the mechanism for making a fine adjustment to square the jamb side pieces prior to nailing.

FIGURE 5 is a vertical cross-sectional view taken along the line and in the direction of the arrows 5 5 of `FIGURE 4 to more clearly illustrate the cam adjusting mechanism.

FIGURE 6 is a vertical cross-sectional viewtaken along the line and in the direction of the arrows 6 6 of FIG- URE l to more clearly illustrate the height :adjusting and compensating mechanism. p

Referring to FIGURES 1 and 2, there is illustrated a rough opening in a wall of a height H and a width W, the rough opening being formed by the vertical studs 10 11 on either side thereof, the rough header 12 and the fioor or threshold 13. In accordance with the usual framing procedure, the rough opening is made somewhat larger than the finished door jamb, generally designated 8, which is to be received in the rough opening, some clearance being left all around at 17, 18 and 19 so as to provide for shimming of the iinished door jamb for purposes of plumbing and leveling of the finished door jamb. In this connection, it is to be ntoed that the aforementioned clearance and the spacing 9 between the Afinished door jamb and the door frame square of this invention, generally designated 20, is exaggerated for purposes of more clearly illustrating the invention.

The finished door jamb S is composed of .a left jamb side piece 14, a right jamb side piece 15,` and .a jamb door `dimensions and are usually furnished slightly oversize so as to permit the lower ends of fthe jamb side pieces 14, and 15 to Ibe cut oif even with the upper surface of the floor =13. Although not illustrated, it -is to be understood that `the clearance spaces 17, 118 and 19 throughout the length thereof are not usually uniform, thus customarily the master carpenter in installing the finished door jamb will place shirns Z8 and 29 intermediate the finished door jamb and the structure for forming the rough door opening as .indicated in IFIG- URE l. These shims are usually a pair of shingles or pieces of shingles `set one against .the other so as to form opposing wedges. They are ldriven into place so as to take up the space of clearance wherever it happens to be, after the door jamb is accurately positioned.

According .to the present invention, the door frame square will .accurately hold the jamb side pieces 14 and 15 `of the iinished door jamb and rthese will -be parallel and plumb with the jamb head piece 16, which likewise is held perfectly level and square with the jamb side pieces. The plumb condition is indicated by the levels 33 and 34 `of the `door frame square.

The locating of the zfinished `jamb side pieces and jamb head piece is accomplished =by a door frame square of the present invention, -now to be described. The `door frame square 2t) comprises a left side bar `21 and a right side `bar 22 which may be made `of rectangular shaped tubular pieces of aluminum. One end of an upper cross bar 23 is welded or otherwise secured to the left side rail adjacent `the upper end thereof, while one end of `a lower cross bar 24 is likewise secured to the right side bar 22 Iadjacent the lower end thereof. Preferably the cross ybars are of a length to extend substantially threequarters of the distance across the width of the narrowest rough opening in which the door jamb is to be set. The

3 cross bars 23, 24 in cross section are of the same shape and size as the side hars 21 and 22.

A top gusset 25 that is U-shaped in ver-tical crosssec'tion is along .the left hand 4edge portions of the legs 25b .thereof `secured to the left side bar by, for example, rivets 27 .and along its lower horizontal edge portions is riveted to the adjacent portions of the upper cross b-ar. The gusset 25 has a web portion 25a that in part voverlies the upper end of lthe =bar 21 and is of a length that is slightly less than the width W of the smallest rough opening in which Ia door jamb is to -be set. The gusset 25 is secured -to the side :bar 21 and bar 23 to have the upper surface of the web 25a extend .at right angles to the surface of Ithe rail 21 that abuts .against the jamb side piece 14. The gussett 25 serves two primary functions, i.e. serving as a reinforcing member, .and 'squaring the jamb head piece 11-6 and holding it in a squared condition, it being noted that the top surface of the web 25a .abut-s against the jamb head piece 16.

A lower gusset 26 that is generally U-shaped in vertical cross-section, has the lower edge portions lof the legs 2Gb thereof riveted to the lower crosssbar 214 and along the right hand edge portions is riveted to the adjacent portions of the rail 22. The gusset 26 has a web portion 26a that extends from closely adjacent the lef-t hand end of the cross bar 24 in .an inclined upwardly direction to have the opposite end thereof .closely `adjacent the left side of the rail 22. A cutout (not shown) is formed in the web `26a to permit .the legs 26b toverlapping the side bar 22 on either side thereof. The gusset 26 serves as a reinforcing member for retaining the cross-har 24 in right .angular relationship to the side bar 2v2.

In order to retain .the side bar 22 in various selected adjusted positions relative to the `side rbar 21, there are provided a pair of upper adjusting bars 30 that at their one end are securedto the upper end of the side bar 22 :for limited horizontal and vertical movement Irelative thereto by the .-upper cam assembly 39. One ad-v justing bar 30 is located to .overlie the outer surfaces of 'each leg 25b of the gusset. Likewise .a pair Iof lower adjusting Ibars 31 are secured tothe left side bar 21 for limited vertical .and horizontal movement relative thereto by .a cam assembly 40. The adjusting hars are located to abut against the outer surfaces of the legs 26b of the lower gusset. The cam assemblies will be described in detail hereinafter.

Each of the adjusting bars 30 and 31 has a pair of apertures 42a, a pair of apertures '4217, .a pair of .apertures -42c and .an aperture 42d (in FIGURE l the pins 41 are extended through the apertures 42a). The `Spacing between each corresponding pair of apertures 42a, 42E, and 42C respectively of each adjusting bar lis equal |while the `spacing between the aperture 42d `and the aperture 42a that is formed 4in the intermediate portion of each adjusting bar likewise is equal to the spacing between the pair of apertures 42a. Thus, as will become more apparent hereinafter the door lframe square of this invention may be used on, for example, the following door sizes: -2 feet; 2 feet, 4 inches; 2 feet, 6 inches; yand 2 feet, 8 inches. It is to be understood that the aforementioned dimensions are merely .given `for purposes of illustration rather than to constitute a limitation on the door Iframe square of this invention.

Formed in each of the cross pieces 23 and 24 are a pair of apertures 43, the spacing Ibetween the apertures 43 corresponding to the spacing of each pair of apertures 42a, 42b, and 42C of the adjusting bars. Likewise, apertures 43 are provided ineach of the upper and lower gussets 25 and 26 and have bushings 44 mounted therein that have openings coextensive with the apertures 43 provided in the cross bar. In order to retain the side bar 22 at a given rough width relative to the side bar 21 there are provided a pair of pins =41 for each of the cross pieces. It the door frame square is constructed for setting door jambs in ydoors of the narrowest width that it is to be used with, then a pin |41 .is extended through each aperture 42a of each of the upper and lower cross pieces and the apertures 43 of the respective gussets and cross pieces as illustrated in FIGURE l and FIGURE 2. Since a pair of horizontally spaced pins are extended through each set of upper and lower adjusting hars and the adjacent cross pieces, the adjusting bars are firmly held in position relative to the cross pieces and therefore cannot move out of right angular relationship with respect to each of the side bars 21 and 22. It is to be noted that each pin has a head 41a that bears against one of the adjusting bars and a spring loaded lock ball 4117 that bears 'against the corresponding opposite adjusting bar for retaining the pin in the apertures through which it is extended. The pin is also provided with a handle 41C for facilitating the removal and inserting the pin through the respective apertures.

Iff the door frame square has the pins extended through the apertures 42a and it is then desired to use it for setting door jambs in a `door opening of a wider width, for example, 2 fee-t, 4 inches, then the four pins 41, are removed and the side bar 22 moved away from the side bar 21 so that each aperture 42b will be coextensive with an aperture 413.. The pins are again reinserted and the door fname square has been adjusted for use in setting door jambs for doors of 2 feet, 4 Iinches. If the door'frame square is to be used for the Widest width, the door pins are removed and Ithe rail 22 Vis moved relative to the rail 2l so'that the apertures 42d of the upper adujs'ting bars is coextensive with `the left set of apertures 43 and the right' set of apertures 42a is coextensive with the right set of apertures I43. 'l Due to the provision of the aforementioned apertures 43, 42a, 421;, 42C, and 42d together with the pins 41,'

adjustment can be made that corresponds roughly -to the expectant width of the rough opening.

In order to provide a ne adjustment in the final squaring and plumbing of the door jamh, the cam assemblies 39 and 4i) are provided. Thus after a rough adjustment has been made and the door frame square is set in the rough opening with the jamb pieces intermediate the structure forming the rough openingof the door framel square, the cam assemblies are setas will be described hereinafter.

Since each or" the cam assemblies 39 and 40 are of similar construction, only the `rcam assembly 39 will be described in detail. .Referring in particular -to FIGURES 4 and 5, it is to be noted that each cam assembly includes a cylindrical cam 50 having a str-aight portion 51a of the handle bar 51 extended therethrough. Apertures are provided in the handle bar portion 51a and the cam 50 to have the pin 53 extended therethrough so that the cam will be rotated upon rotating the handle bar 51. Bushings 56 are provided in the adjusting bars 30 to have 'the handle bar portion 51a extended therethrough and rotatably mount the handle bar, there being pins 57 for removably retaining the handle bar in the bushings 56 and adjusting bars 30. Formed integral with one end of the handle bar portion V51a and outwardly of the adjusting bar 30 is an inclinde portion SIb. Mounted on the portion 51h is a hand grip 52. The portion Slb is of a length and inclined at `an angle suicientto permit the user readily grippingV said handle grip -52 and rotating the handle bar yabout the central axis of the portion S1 Y Y Mounted inappropriate apertures formed in the side bar 22 is a cam bushing 54. The interior diameter of the cam bushing is slightly larger than the exterior diameter of the cylindrical cam. In order to give the camming action to lthe aforementioned structual members of the camming assembly, the handle bar` portion 51a is extended through an appropriate bore formed iu the cam such that the center longitudinal -axis 51C of the portion 51a is offset from the center longitudinal axis 50a of the cam by a distance E. Preferably the external diameter of the `cam is less than the internal diameter of the bushing 54 by a dimension E. l

The hand lever is mounted in the bushings 56 to be frictionally retained in any set position. A datum position for the handle 'is as illustrated in 'FIGURE l whe-rein the cam bears against the bushing 54 along the axial line 39a.

In order to move the side bar 22 away from the side bar 21 the hand grip yof cam `assembly 39 is rotated in the direction of the arrow 60 to a position 901 spaced from the datum position.` ln the aforementioned 901 position the cams will bear against the bushings 54 along the axial line 3917. The cam in moving from position to bear against the bushing at 39a to a position at 39h forces the bushing to move horizontally in the direction of the arrow 61,. At the same time the side bar 21 is permitted to move vertically downwardly in the direction opposite arrow 62 -due to the foot assembly structure which will` be described hereinafter. The side bar 2,1 moves to a downward position due to the spaced point securing of the adjusting links to the cross piece and the upward force exerted in bar 22 that-is 'against .the jamb head piece. This movement islcompensated for by turning the foam assembly 4() wherein the door frame square is held in a squared condition.

lf it is desired to move the side bar 22 inwardly towards the side bar 21 and then the hand lever of cam assembly 39 is moved from the datum position illustrated in FGURE 1 in the direction of the arrow 59 (90 with respectto the datum position) rto` a position wherein the cam contacts the bushing 54 along the axial line 39C. This results in the side bars moving in a horizontal direction opposite the `arrow 61 and the side bar 22 moving in the same manner described in the preceding paragraph.

Even though it has been set forth that the hand levers are moved `at different times, it is to be understood that usually the carpenter will grasp one hand lever in each hand and rotate them simultaneously. Further, itis to be understood that 4the desired setting of the hand levers may be less than 90 from the datum position and that in properly squaring the door jamb the setting of the two hand levers with respect tothe datum positions may be at different angles. The angular displacement depends on the amount of undersize or oversize of the roughdoor opening and the diameter of the bushing, cam and dimension E. For the door frame squares of this invention, it has been found that a dimension E of 1/8" is satisfactory, although it could be a larger dimension if desired. Using E of` 1/s" and turning the hand lever 90 from `the datum position, the side bars are moved ls in a horizon-tal direction.

Additionally, it is tobe mentioned that even though it is preferred that the door frame square be` provided with the `foot assemblies such as disclosed, it is operable even though such assemblies are not provided (provided the side bars lare of a proper height).

In order to provide a height adjustment feature in order that the door frame square of this invention may be used for setting door jambs of diierent heights, the foot assembly, generally designated 70, is provided. Since there is a foot assembly for each side bar and each of the foot assemblies are of the same construction, only the foot assembly that is secured to the right hand side bar 22 will be described. The foot assembly 70 includes a rectangular tube that in horizontal cross section is of a size to telescope within the side bar 22 and form a close lit therewith. A pair of apertures 72 are provided in the upper end of the tube 71 and a pair of apertures 84 are provided in the side -bar 22 below apertures 74, apertures 72 and 84 being at a location below the door cross piece for removably securing the foot assembly in a selected position on the lower end of the side bar. It is to be noted that dimension that it extends below the tube is dependent upon the size or height of the door jamb to be set.

p rough door opening.

` Mounted on the lower end of the tube 71 and forming atelescopic fit therewith is a side bar extension 77, and a` sleeve 81, said side bar yextension and sleeve S1 being of a length approximately equal to the distance that the tube 71 extends below the side bar 22. Forming a telescopic tit Within the tube 71 is a hollow rectangular retainer 7.9, the rectangular retainer being of a length to have the lower end thereof located adjacent the lower end of the tube 71 and the upper end extend intermediate the upper end of the tubular extension and the apertures 72 formed in the tube. 'Ihe side -bar extension 77, the tube 71, and rectangular `retainer are retained in the above described `relationship by being riveted together with rivets78. p

. @The retainer 79 has end walls 79a with rod apertures formed therein whereby the rod 82 may be extended therethrough. The `rod 82 is lof a length to extend a ways above the `upper retainer wall 79a and a substantial distance below the loweriretainer wall 79b. A collar S3 is mounted in a xed position on the lower end portion Vof the rod 82 to bear against the upper surface of the retainer wall79'b. VThe coil spring 84 is positioned in the retainerl to have the upper end bear against the retainer walls.7 9a and the lower end bear against the upper surface of the collar S3 to resiliently retain the collar in abutting relationship with the wall 79b, the rod 82 being extended through the coil spring. When the collar 83 is abutting against the lower wall 79b the axial height of the door frame square together with the foot assembly from the lower end of the retainer rod 82 to the upper surface of the gusset 25 is approximately equal to the distance the jamb head piece is to be located above the door. In the event the rough opening is of a smaller axial height than normally to beexpected, the door frame square still may be used due to the provision of the resilient. mounting of rod 82.` That is the rod 82 in bearing against the floor will have the web 26a bear against the upper door jamb head piece `and will result in thecollar 83 being moved away from the retainer wall 7 9b. Thus, even if the height of the rough openingis less than desired, the upper door jamb head piece may be shimmed due to the resilient feature of the foot assembly.

The foot assembly as illustrated and described above is for a door of a height H. If the door frame square is to be used for a door that is in substantially shorter height, then the pin 73 is removed and the tube 71 displaced from the side bar 22 so that the sleeve 81 may be taken off the tube. The tube is again reinserted into the `side bar so that the upper `edge of extension 77 bears against the lower edge of bar 22. At this time apertures `82 will be coextensive with the `apertures 84 of bar 22. The pin 73 is reinserted and Ithe door frame square is yagain ready for use. It is to be understood that sleeves of different heights may be used in place of sleeve 81, and -apertures 82 correspondingly spaced to provide for door jambs of varying heights.

In order to facilitate Imoving the door frame square from one door opening to another a handle 92 is secured to each of the side rails. To aid in retaining the door` frame square in the door opening, a plurality of brackets 93 are mounted on each ofthe side bars. The brackets 93 each have a lateral extending portion to bear against the inner surface of the door jamb and another portion at right angles thereto to bear against the outer edge of the door jamb and overlap the structure to which the door jamb is secured.

In using the door frame square of this invention, for setting door jambs, first a door jamb head piece is cut one-eighth oversize if desired. Next the jamb may be nailed together on the oor and then inserted into the Now the head piece is shimmed solid. After the head piece has been shimmed, the door frame square is positioned within the spaced jamb and then the level of the jamb head piece is checked.

After the jamb head piece has been leveled, the cam hand levers are rotated in vthe direction for the `desired width of door 'over size or under size. Ifstlie desired width is undersiz'ed, then the hand levers of the cam i assemblies 39 and are respectively rotated in the direction of the arrow 5.9. It isto' be noted that in, for example, setting the `door frame square fo'r an undersized door, the hand levers ef the two cam assemblies are rotated in opposite directions and are located diagonally at cross square from one another thereby facilitating properly setting the handles. Since the hand levers are frictionally mounted, the' will 'remain in `a set position until they have been manually` moved therefrom. Now the shims 28 Lare inserted between the stud and the adjacent door jamb side piece so that they form a snug fit against the door frame square withoutthe use of 'excessive-force on the shim. After shimming the side piece, the door jamb is nailed assdesired and then the door jamb is rechecked for plumbing, the hand levers again moved to a datum position and the door frame squareis` `rerncuved from the opening.- t i As many widely apparent different embodiments of this invention may be made without `departing from the spirit and scope thereof, it is to be understood that I do not limit myself to thev specific embodiments herein.

l-VVhat I claim is:

1. A door frame square comprising a first elongated vertical member, a secondelongated vertical member, a first cross piece extending intermediate said members and having one end connected to the upper end portion of said first member, a second cross piece extending inter` mediate said members and having oneendconnected to the lower end portion of said second member, first cam means connecting the opposite end of the first cross piece to the uper end portion of the second vertical member for `selectively horizontally moving said first cross piece relative to said second member, and second cam means connecting the opposite end of the second cross piece to the lower end portion of the firstV vertical member for selectively horizontally moving said second cross pieceV and second vertical relative to said first member the same Vdirection as produced by corresponding operation of the first caml means to retain said members' in parallel relationship of varying horizontal spacingt i 2. A door `frame square comprising a yfirst elongated vertical member, a second elongated vertical member, a first cross piece having one Vend connected to the iup'p'er end portion of the first member, a second cross piece having one end connected to the lowerend portion of the secondv member, rst and second cam means for `selectively varying the spacing between the elongated members to upon being rotated the same angular amounts movably retain said members in parallel relationship, the first cam means being rotatably mounted in the upper end portion of the second member 'and connected to tbe other end of said first cross piece, and the second cam meansbeing Q rotatably mounted in the lower end portion of the first member and connected to the other end of said second cross piece.

`3. A door frame square comprising a first vertical elongated member, a second vertical elongated member, a first vcross piece connected at one end to the upper end of one kof said members, a second cross piece connected at one end to the lower end portion of the other` of said members, first rotatable cam means connecting the otheiend of the first cross piece to the upper end portion of the other ofV said vertical members for uponV being rotated in a given direction to selectively vary the spacing between theupper end portions of said members, and second cam means connecting the other end of the second cross piece to the other of said vertical members for upon being rotated in a direc-tion opposite said given direction the same angular distance to selectively vary the spacing between the lower end portions of saidl members, said cross pieces and said cam means upon being rotated in opposite directions the same angular amount horizontally moving the elongatedrmembers While retaining them inV right angles thereto, a first adjusting bar, a second adjusting bar, first means for disattachably connecting and retaining the rst cross piece and first adjusting bar in the same vertical and horizontal relationship, second means vfor disa'ttachably connecting and retaining the 'second crossrpiece .and second adjusting Abar in the same vertical andhorizon'tal relationship, first cam means rotatably mounted on the upper end portion of theV second member and connected to the first adjusting bar, second cam means rotatably m-ounted on the lower end portion of the first Vertical member and connected to the second adjusting bar, said cam means being provided for being rotated to adjustably space the first and second elongated members and hold them parallel to one another in the adjusted position, and iioorV engaging means connected to the lower endportions of each of said vertical members forV resiliently urging said Vertical members in anl upward direction.

References Cited' in the file of this patent UNITED STATES PATENTS

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US493566 *Apr 1, 1892Mar 14, 1893 Setting-gage for door-frames
US2748493 *Aug 12, 1952Jun 5, 1956Williams George RJig mechanism for installing doors and door frames
US2771688 *Feb 4, 1955Nov 27, 1956Baker Harold EDoor framing jig
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Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3403486 *Oct 14, 1966Oct 1, 1968Schubeis Ewald Ingemar EmanuelSupporting frame for door frames
US3408744 *May 11, 1966Nov 5, 1968Lloyd W. FitzgeraldDoor template
US3675297 *Mar 1, 1971Jul 11, 1972Appleton Tony EMachine for assembling a pre-hung door unit
US4733475 *May 20, 1987Mar 29, 1988Youmans John WExtension level apparatus
US6868613Apr 21, 2003Mar 22, 2005Melvin W. SumnerTrim installation tool and method
US6966119 *Mar 25, 2004Nov 22, 2005Michael DlugoleskiThree sided adjustable level and assembly
Classifications
U.S. Classification33/194
International ClassificationE04F21/00
Cooperative ClassificationE04F21/0007
European ClassificationE04F21/00B