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Publication numberUS3579802 A
Publication typeGrant
Publication dateMay 25, 1971
Filing dateDec 2, 1968
Priority dateDec 2, 1968
Publication numberUS 3579802 A, US 3579802A, US-A-3579802, US3579802 A, US3579802A
InventorsFrank R Gajovski
Original AssigneeFrank R Gajovski
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Method for insulating boiler or like housing wall
US 3579802 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)

United States Patent Inventor [72] Frank R. Gajovski 41 12 Swain Drive, Barberton, Ohio 44203 [21 1 Appl. No. 780,322 [22] Filed Dec. 2,1968 [45 Patented May 25, 1971 [54] METHOD FOR INSULATING BOILER 0R LIKE HOUSING WALL 5 Claims, 5 Drawing Figs. 52] U.S. C1 29/4322, 29/455, 52/261, 287/189.35 [51] Int. Cl 823p 11/00 [50] Fiel of Search 29/432, 432.2, 455; 287/l89.35; 52/261 [5 6] References Cited UNITED STATES PATENTS 3,022,687 2/1962 Richards (29/432UX) for retaining insulation and/or finishing sheeting thereon. Studs may have inner BACKGROUND OF INVENTION SUMMARYOF INVENTION The method of the present invention has particular utility for retaining insulating material against a boiler wall, and includes weldingrows of spaced metal studs on the wall to extend normal thereto, the studs having reduced outer ends defining annular shoulders adapted to be in given spaced relation to the wall, and said reduced outer ends being recessed to define a peripheral cutting edge. A channel-shaped strip of thin metal is supported to press a web portion thereof against the reduced ends of each said row of studs, while a mallet or other impacting tool is progressively struck against the web at the several points of contact thereof with cutting edges of the studs, first the punch holes through the web, and then to form or peen heads on the reduced portions for retaining the strip against the annular shoulders. A plurality of said channel strips attached in this manner, in parallelism'to each other, may be used to support protective metal sheeting to outer flanges of the exposed webs of the channel strips, as by means of self-threading screws.

A general object of the invention is to provide an improved method and means for covering a boiler or like wall with insulating and finishing materials with a substantial reduction in time, labor, and material as compared with known prior art methods.

Other objects of the invention will be manifest from the following brief description and the accompanying drawings.

' Of the accompanying drawings:

FIG. 1 is a fragmentary horizontal cross section through a boiler or like wall, illustrating an initial step in the method by which special studs are welded to the wall, a metal strip being shown, by chain-dotted lines, in position for attachment to the studs.

FIG. 2 is a fragmentary front elevation of the wall as shown in FIG. 1.

FIG. 3 is an enlarged vertical cross section, taken substantially on the line 3-3 of FIG. 2, but showing the metal strip in full lines, and held against a cutting edge on a reduced portion of a stud.

FIG. 4 is a fragmentary view corresponding to a portion of FIG. 3, and on the same scale, illustrating the metal strip pierced by the cutting edge of a stud, and held against a shoulder thereon by a retaining head formed on the reduced portion of the stud.

FIG. 5 is a fragmentary front elevation as viewed from the right of FIG. 4, and on the same scale.

Referring to FIGS. 1 to 5 of the drawings, generally, and to FIGS. 4 and 5 in particular, there is illustrated one application of the method and means of the present invention, as for insuseveral respects. and

lating a boiler wall 10 with a layer 11 of molded or loose insulating material. Where the layer 11 is a molded insulating material it may be retained against the wall 10 by a plurality of thin-webbed, channel-shaped, metal strips 12, 12, each affixed to a row of spaced metal studs 13, 13 rigidly attached to metal wall 10. The strips 12, as best shown in FIG. 4, are adaptable for attaching corrugated metal or other protective sheeting C thereto, as by means of self-threading screws S (see chaindotted lines in FIG. 4).

Referring to FIG. 3, each stud 13 may comprise a length of metal rod stock which is flat at one end 15, and has a reduced neck portion 16 at the other end, defining an annular shoulder 17. The outer end of reduced portion 16 may be recessed or concaved at 18, as shown in FIG. 3, to define a sharp peripheral cutting edge 19, for purposes to be described.

In use of the method of the invention for insulating a boiler wall 10, for example, an insulating layer 11 of uniform thickness may be retained flatwise against the wall, as shown in FIG. 1, after a plurality of studs 13 have been welded to the wall 10, in known manner, to extend normal to the wall. As an example, a suitable welding tool may be applied over the reduced end 16 of each respective stud, and operated to pass a requisite electrical charge through and the stud to weld the flat end 15, thereof to the wall 10. Rows of spaced studs 13 are thus welded to the wall to have the annular shoulders 17 thereof uniformly spaced from the wall, to be substantially flush with the outer surface of the required insulating layer 11, as shown in FIG. 1.

Next, while a thin-webbed, metal channel strip 12 is held against the cutting edges 19 of a row of aligned studs 13, the web 21 of the channel strip is impacted by a mallet or other tool, at areas opposite each respective stud, first to punch a hole in the web 21, so that the strip can be forced inward of each location, to full engagement of the web with the annular shoulder 17 of the respective stud, and then with further impaction against the respective protruding stud portion with a suitable impaction tool, a head 22 is formed, as shown in FIGS. 4 and 5, firmly to secure the strip 12 against stop shoulder 17. i

With a plurality of said channel strips 12 suitably mounted in parallelism to hold the insulation 11 against wall 10, the insulated area can be protected, as by a facing of decorative sheeting C, such as corrugated metal, secured to the strips 12 by self-threading screws S (see chain-dotted lines in FIG. 4).

Modifications of the invention may be resorted to without departing from the spirit thereof or the scope of the appended claims.


1. A method for securing thin-webbed metalwork to an existing metal wall surface comprising: the steps of affixing to said wall surface a plurality of studs, each having a reduced free end portion defining a peripheral shoulder to be in spaced relation to the wall surface when the other end of the respective stud is secured thereto, and the outer end of said end portion being recessed to define peripheral cutting edge; supporting the metalwork to engage said thin web portion thereof against said cutting edge of each stud; and impacting said engaged web portion against the cutting edge of each stud; first to pierce and project the reduced portion thereof through the corresponding web portion, and then to peen the respective projected free end portion against the web portion, thereby to form heads on the respective studs for securing the web portion to the peripheral shoulder of the studs; and securing a facing of sheet material to said metalwork to form an enclosure between said wall and said facing sheet.

2. A method as in claim 1, each said stud being affixed to said wall surface by applying a welding charge therethrough while said other end of the stud is held against said wall, to weld the stud thereto.

3. A method as in claim 2, including retaining a filler of insulating material between the secured said web portions and said wall.

4. A method as in claim 1, including retaining a filler of insulating material between the secured said web portion and said wall.

5. A method as in claim 1, including retaining a filler of insulating material between the secured said web portion and said wall.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2245611 *May 7, 1938Jun 17, 1941Frederick W SchultzBuilding construction
US2282293 *Apr 21, 1941May 5, 1942Frank ChristensonHeat insulating lining
US2663270 *May 25, 1949Dec 22, 1953Gregory Ind IncComposite stud
US2737267 *Apr 11, 1951Mar 6, 1956Int Steel CoBuilding construction
US2993110 *Feb 17, 1958Jul 18, 1961Nelson Stud Welding Division OCorrosion inhibiting component for metal construction and method of using same
US3022687 *Sep 21, 1959Feb 27, 1962Arthur J RichardsMethod of riveting
US3147832 *Dec 16, 1959Sep 8, 1964Detroit Stud Welding & Mfg CorMounting means and tool therefor
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3846902 *Apr 21, 1972Nov 12, 1974GorhamMethod of mounting a handle to a vessel
US3861022 *Aug 8, 1973Jan 21, 1975Linde AgMethod of making insulated ducts
US3903582 *Jun 7, 1973Sep 9, 1975Usm CorpMultiple segment fastener and method
US3909907 *Apr 1, 1974Oct 7, 1975Carborundum CoMethod for installing furnace linings
US4406048 *Apr 3, 1980Sep 27, 1983William BaileyMethod of assembling ladder construction
US4459073 *Mar 28, 1983Jul 10, 1984Multifastener CorporationFasteners with piercing and riveting performance
US4543701 *Jun 14, 1983Oct 1, 1985Multifastener CorporationMethod of attaching a fastener to a panel
US4555838 *Dec 21, 1983Dec 3, 1985Multifastener Corp.Method of installing self-attaching fasteners
US4911592 *Nov 14, 1988Mar 27, 1990Multifastener CorporationMethod of installation and installation apparatus
US6755218 *Oct 7, 2002Jun 29, 2004Royal Group Technologies LimitedDuct wrap securing system
US20040016470 *Oct 7, 2002Jan 29, 2004Royal Group Technologies LimitedDuct wrap securing system
US20110278275 *Nov 17, 2011Newfrey LlcArc welding method and arc welding apparatus
U.S. Classification29/432.2, 52/261, 373/137, 52/506.2, 29/455.1
International ClassificationF16B5/04, E04F13/08, F23M5/04
Cooperative ClassificationF16B5/04, F23M5/04, E04F13/0837
European ClassificationE04F13/08B3A2B, F23M5/04, F16B5/04