US3806268A

US3806268A - Free hand jointer device

Info

Publication number: US3806268A
Application number: US00227056A
Authority: US
Inventors: L Francis
Original assignee: Individual
Current assignee: INSTITUTE FOR SOCIAL AND SCIENTIFIC DEVELOPMENT 376 EAST 400 SOUTH NO 315 SALT LAKE CITY UTAH 84111 A CORP OF UTAH; SOLOMON JACK D
Priority date: 1972-02-17
Filing date: 1972-02-17
Publication date: 1974-04-23
Anticipated expiration: 1991-04-23

Abstract

An improved jointer device comprises removable jointer blade attached to a plate member; in a preferred embodiment, the plate member comprises a pair of plate member halves between which the jointer blade is clamped.

Description

United States Patent [191 Francis FREE HAND JOINTER DEVICE [76] Inventor: Leonard L. Francis, 3710 Thom V Blvd., Las Vegas, Nev. 89106 [22] Filed: Feb. 17, 1972 211 App]. No.: 227,056

[52] US. Cl. 404/89, 15/235.3

[51] Int. Cl. .5. E04g 21/20 [58] Field of Search... 404/89, 93; 15/2353, 235.4, 15/235.8

[56] References Cited UNITED STATES PATENTS 334,125 1/1886 Macdonald 15/2353 988,457 4/1911 Glasscock 15/2353 1,027,396 5/1912 Abram 15/2353 9 1,348,639 8/1920 Grundmann 15/2353 1 Apr. 23, 1974 1,590,342 Abram 15/2353 1,646,150 10/1927 Kennedy.. 1,713,513 5/1929 Abram..... 2,834,199 5/1958 Freeman 15/235.8

FOREIGN PATENTS OR APPLICATIONS 632,106 11/1949 Great Britain 15/235! Primary Examiner-Marion Parsons, Jr. Attorney, Agent, .orFirm-Jerry R. Seiler 57 ABSTRACT An improved jointer device comprises removable jointer blade attached to a plate member; in a preferred embodiment, the plate member comprises a pair of plate member halves between which the jointer blade is clamped.

.2 Claims, 3 Drawing Figures PATENTED APR 2 31974 SHEET 1 OF 3 mEDQE PATENTED APR 2 3 I974 SHEET 2 UF 3 MEDQE FREE HAND JOINTER DEVICE BACKGROUND OF THE INVENTION ered unsightly but the setting up or placement of the guides are time consumingand require additional labor and manpower costs. The operation of common small hand held jointers also presents a tedious task requiring an operator on hands and knees to regroove the joint several times-as the concrete sets in an attempt to form a more perfect joint. Such a method is especially burdensome where the joints are of relatively great length.

Jointer blades are usually made of a relatively soft and inexpensive metal. However, the blades often wear down rather rapidly when used extensively due to frictiori and wear on the blade itself which must be driven through the freshly laid concrete. along the jointer blade surface; Since such jointers have not been usually provided with replaceable jointer blades, when the device has been used extensively so that the blade is no longer serviceable, a complete new devicemust be purchased. Having to replace the handle or other jointer components which are not unserviceably worn, make the replacement costs somewhat economically disadvantageous. Jointer blade replacement is usually determined when the distance along the lower blade edge and the jointer plate surface has been diminished so that the depth of a groove cut into the cement is insufficient. Previous devices have not generally been provided with means for replacing or changing the blade for a deeper cut. Itis to the elimination of the disadvantages of jointers as described hereinabove that the present invention is directed.

SUMMARY OF THE INVENTION The present invention comprises a jointer device incorporating removable jointer blade secured to a plate member. I

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 illustrates the device of the invention, the individual components thereof being shown detached; FIG. 2 illustrates the assembled device shown in FIG. 1; and

F IG. '3 illustrates analternative embodiment of a jointer device of the invention.

DETAILED DESCRIPTION OF THE INVENTION Referring to FIG. 1, the jointer device comprises left i and right

plate half members

10 and 10 respectively.

These halves combined provide an enlarged plate having upper and lower substantially flat surfacesrThe lower surface will rest upon freshly poured cement when the device is used to form or cut joint grooves.

Because of the relatively large plate surface area provided, the plate comprising the two. halves as shown, improved stability is realized as the device is pushed across the cement surface. However, since the plate is rather long, for example, preferably between about one and about three feet across, the overall weight per square inch at the cement surface will be relatively small because of the weight distribution across the total surface area contacted by the plate. Thus, any depression on the concrete surface caused by the sliding plate will be minimized. Such a feature will be appreciated by those skilled in the art. I

' Secured approximately midway [between the forward and rear edges of the upper surface of the respective left and right plate members 10 and 10', are left and

right anchor bars

20 and 20 respectively. The anchor bars arezsecured by a plurality of rivets, two of which are shown as 27 and 27 (right and left respectively).

However, other means for securing the anchor bars to the upper surface of the plate members may be used, it being understood that the bottom surface of the plate is to be smooth and substantially uniform so as not to cause blemishes or marks on the concrete surface. Right and left anchor bars 20 and 20' are'also provided with a plurality of threaded apertures 21 and 21' for securing tie bar 18 and a handle member as will be more fully explained hereinafter. I

Also secured to each of the left and right plate mem-. bers 'l0 and 10 is a-clamp bar, left clamp bar 30 attached along the inner side of left plate member 10 and right clamp bar 30'. attached along the inner side of right plate member 10' which plate member sides are oppositely disposed and facing as. shown. The clamp bars may also be secured to the upper plate surface by

rivets

17 and 17. Each of the clamp bars 30 and 30' is provided with bolt apertures 115 and 15 through may be removed and a new replacement blade attached.

In a preferred embodiment, the plate member comprises right and left plate halves each having oppositely disposed and adjacent facing sides between which the jointer blade is secured. Clamp bars may be provided along each of the facing sides having apertures thereinthrough which a bolt or bolts may be engaged. Upper portions of the jointer blade may be provided with bolt apertures which, cooperating with the apertures of the clamp bars may be secured by a bolt or bolts passing therethrough thereby clamping and securing the blade between the plate halves. Other features including anchor means and a tie bar may also be provided as will be explained more fully hereinafter.

which clamp bolts "14, may be inserted for securing jointer blade 22. It will be noted that jointer blade 22 is provided with apertures 16 through which clamp bolt 14 also pass. i

In order to further secure left and right plate members l0 and 10' for improved structural stability a tie bar 18 may be used having a plurality of apertures 11 thereinthrough which bolts 13 may be inserted and which bolts may be threadedly engaged in threaded apertures 21 and 21' of anchor bars 20 and 20' respectively. Any number of such apertures in both tie bar 18 and threaded aperture in left and

right anchor bars

20 and 20 may be used together with a plurality of bolts 13 as desired depending on the structural stability requirements.

Referring to both F 16$. 1 and 2, the latter showing the jointer device of the invention fully assembled, jointer blade 22 is placed between the facing sides of left-and right plate members and 10 so that apertures 16 align with apertures and 15 of the left and

right clamp bars

30 and 30 respectively. Bolts 14 are then inserted through the cooperating and communicating apertures and nuts 12 threaded on to the bolt ends. Once the bolts and nuts have been tightly engaged so as to secure jointer blade 22 between the two plate members, tie bar 18 is placed on anchor bars and 20' with apertures 11 aligned with apertures 20 and'2l. Bolts 13 are then secured into the threaded apertures on the anchor bars so that the device is rigidly assembled for use. Also shown 'inFIG. 2 is a handle attachment member illustrated in phantom which may be secured by placing bolts through the apertures and through tie bar 18 and threadedly engaged into

respective anchor bars

20 and 20. Thereafter handles of any desired type and length may be attached to the handle attachment member.

Where the plate is to be used extensively and where longevity is desired, the materials of which the respective plate halves are constructed are preferably steel such as a high quality steel plate, for example, 4: inch thick although other thicknesses may be used as desired. If weight is a factor, lightweight alloys or aluminum plates may be used instead.

The jointer blades may be composed of a cast bronze or other similar material and having different depths and radii, for example, between about 1 and /8 inch width at the top portion, a k to 1 inch depth with the blade edge itself having a radius required to form a groove satisfying various state and city building codes. Further, an operator may have blades of several depths and widths available which may be easily exchanged where different groove sizes are required. Such an advantage as well as other modifications of the device as shown within the purview of the invention will be appreciated by those skilled in the art.

Referring to FIG. 3, an alternative embodiment of .the invention is illustrated utilizing a single plate 35 to which jointer blade 32 is attached. The front and rear sides of the plate may be provided with a threaded aperture 39 which is aligned with an elongated rear and front notch 19 and 19' respectively. A bolt 38 is then threadedly secured to both the front and rear of jointer blade 32 into the threaded apertures 39 disposed at both front and rear of plate 35. To exchange the blade, the bolts are simply loosened, the blade disengaged by pulling it down so that upwardly extending

flanges

36 and 36 are freed from the respective bolts, and a new blade inserted aligning notches l9 and 19 with the bolts. FIG. 3 also illustrates a handle attachment member in phantom which can be secured to the upper side of plate 35 by threadedly engaging bolts (not shown) 34 on the upper surface of the stand while pushing and pulling the jointer to form a groove with much more convenience as compared to the use of previous devices. These as well as other embodiments will be evident to those skilled in the art.

I claim:

1. A jointer device comprising a single plate having flat upper and lower surfaces and front and rear wall extending substantially normal to said upper and lower surfaces said upper surface having means for securing a handle thereto, a removable jointer blade extending downwardly from said lower surface said blade having front and rear integral flanges extending upwardly and engaging said front and rear plate walls respectively, each flange having an elongated notch therein, and bolts secured in each of said front and rear plate walls and through said notches for securing said jointer blade and whereby said blade may be adjustably elevated and lowered along said notches.

2. The device of claim 1 wherein the plate is between about 1 and about 3 feet in length.