|Publication number||US1550296 A|
|Publication date||Aug 18, 1925|
|Filing date||Mar 27, 1924|
|Priority date||Mar 27, 1924|
|Publication number||US 1550296 A, US 1550296A, US-A-1550296, US1550296 A, US1550296A|
|Original Assignee||Charles Weiland|
|Export Citation||BiBTeX, EndNote, RefMan|
|Referenced by (4), Classifications (6)|
|External Links: USPTO, USPTO Assignment, Espacenet|
Aug. x8, 1925.
y C. WEILAND TROWEL Filed March 27. 1924 Patented Aug. 18K, ,1925.
UNITED STATES CHARLES WEILAND, or NEW YORK, N. Y.
Application filed March 27, 1924. Serial No. 702,230.
T o all whom t may concern.'
Be it known that I, CHARLES VEiLAND, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Trowels, of which the following is a specification.
rIhe present invention relates to trowels such as are used by plasterers. These trowels should be fairly resilient so as to yield in the laying on of the plaster, but Should have a rigidly constructed handle to provide a firm, positive hold. Furthermore, the rivets or other fastenings for the handle should not extend through the face of the flexible plate.
A trowel intended to meet these requirements is disclosed in United States Letters Patent No. 850,945, in which the base of the handle is riveted to a flexible strip which is secured by brazing, to the vback of the flexible trowel plate. in the nature of an improvement on the invention disclosed in said patent, intended primarily to overcome certain weaknesses which developed in that construction and to provide a more secure and permanent connection between the handle attachment strip and the trowel plate.
These and other objects are attained in the construction disclosed in the accompanying drawing which illustrates several of the preferred embodiments of this invention.
Figure 1 is a` perspective view of the trowel.
Figure 2 is an enlarged broken plan view of parts of the handle base securing strip and trowel plate.
Figure 3 is a broken cross sectional view as taken on substantially the plane of line 3 3 of Figure 2.
Figures 4 and 5 are enlarged cross sectional views illustrating different forms of joints between the attaching strip and trowel plate.
The handle 7 is shown as of conventional form having a rigid base 8 secured by rivets 9 to the attaching strip 10.
The attaching strip while rigidly secured to the rigid handle `base is in itself flexible so as to bend more or less with the resilient trowel plate 11 and is shown as permanently secured to the back of the trowel plate by a brazed joint 12.
After extensive service or under particularly severe use, it has been found that the The present invention is attaching strip may tear away from the trowel plate. I have discovered that this fault can be entirely overcome and a better `joint be effected by providing channels between the meeting faces of the strip and plate.
In the illustrations the attaching strip is shown as ribbed or corrugated at 13 at opposite sides of the handle base t0y provide channels 14 in the under face of the same in line with channels 15 cut in the back of the trowel plate. vThe brazing material usually lls up thesetwo part channels, as indicated at 16, producing ay bond extending in opposite directions away from the flat plane of the joint between the two parts. K In other words the filling of the channelsv 14 and 15 by the brazing material produces a thickened rib or spline to further interlock the attaching strip 1() to the trowel plate 11 and prevent relative shifting therebetween. In Figure 5 I have shown how the groove 16 in the back of the trowel plate may be undercut and how a slot 17 may be cut in the strip extending through from the channel 14 so as to cause the brazing material to head over at opposite ends and thus form a continuous rivet positively connecting the two parts.v
This improved construction secures the parts permanently together without impairing the flexibility of the trowel plate and it is inexpensive and simple as toy manufacture.
Vhat I claim is:
1. A plasterers trowel comprising a flexible trowel plate, a handle having a narrow rigid base and an intermediate flexible attaching strip wider than the handle base and rigidly secured thereto, said attaching strip and trowel plate each having recesses between the meeting faces of the same and secured together in face to face engagement by a brazed or similar joint, the recesses between the strip and the plate being filled with the brazing material to further reinforce the connection therebetween.
2. A combination as in cla-im 1 in which the recesses are formed as channels partly in the strip and partly in the back of the plate and in which the brazing or connecting material forms a bond extending into the channeled parts of the strip and plate.
3. A combination as in claim 1 in which the recesses are formed as channels partly in the strip and partly in theback of t-he plate and in which the brazing or connecting material forms a bond extending into the channeled parts of the strip and plate, the channel in the plate being under-cut and the channel in the strip being` cutl through the top of the saine to produce a bonding connection headed over at both ends.
4. A plasterers trowel comprising a flexible trowel plate, a flexible attaehingjr plate brazed to the back of the trowel plate and 10 having` channels opposed to the back of tho plate, said channels being filled with brazing material to forni a bond between the flexible plate and the trowel plate and a handle having` a rigid base rigidly secured to the attaching plate between the channels aforesaid.
In testimony whereof I aix my signature.
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US3460183 *||Mar 10, 1967||Aug 12, 1969||Harrington Eugene M||Trowel|
|US4817231 *||Apr 16, 1986||Apr 4, 1989||Amco Tool And Stamping Co., Inc.||Durable trowel construction|
|US4884312 *||Oct 23, 1987||Dec 5, 1989||Clark Ronald M||Hand trowel|
|DE102012020727A1 *||Oct 23, 2012||Apr 24, 2014||Arsen Schichragimov||Device for applying and smoothing of coating material on smoothing trowel, for use in bricklayer and tile setter handicraft, has trowel blade sections arranged at support element between trowel blade and handle part|
|U.S. Classification||15/235.4, 294/7|
|International Classification||E04F21/06, E04F21/02|