US2861563A

US2861563A - Burner grate construction

Info

Publication number: US2861563A
Application number: US508222A
Authority: US
Inventors: Lionel R Jensen
Original assignee: Geo D Roper Corp
Current assignee: Geo D Roper Corp
Priority date: 1955-05-13
Filing date: 1955-05-13
Publication date: 1958-11-25
Anticipated expiration: 1975-11-25

Description

Nov. 25, 1958 JENSEN 2,861,563

BURNER GRATE CONSTRUCTION Filed May 15, 1955 i 9 Z? 2/ Z 7 A? 'lg ig \\\\\\\\\\\vimys 7////////// A "a 25 26 In Van/0r flames of a burner.

2,861,563 BURNER GRATE CONSTRUCTION Lionel R. Jensen, Rockford, Ill., assignor, by mesne assignments, to Geo. D. Roper Corp., Chicago, 111., a corporation of Delaware Application May 13, 1955, Serial No. 508,222 i 1 Claim. Cl. 126-214) This invention relates to burner grates and more particularly to a top burner grate for a gas stove.

It has heretofore been proposed to mount a diffuser plate on a top burner grate of a gas stove to diffuse the The previous constructions of such grates, wherein the diffuser plate has been mounted directly on the inner ends of the grate arms, have not been entirely satisfactory due to the tendency of the diffuser plate to rattle on the grate arms and also due to the ease with which the diffuser plate could be accidentally dislodged from its mounting on the grate arms and drop through the grate or onto the floor. When the diffuser plate was formed of a frangible material such as glass, this frequently resulted in the breaking of the diffuser plate.

Another problem presented in the use of glass diffuser plates on the burner grate was the tendency of the diffuser plate to adhere to the grate after-use and prevent its removal for cleaning. The grates are generally formed of a cast material and then coated with an enamel to provide a smooth surface which can be easily cleaned. The enamel coating on the grate tends to fuse with the glass baffle plates, at the high temperatures to which the grates are subjected during use, so that subsequent removal of the batfle plates from the grates was frequently rendered difiicult.

An important object of this invention is the provision of an improved construction for removably mounting a diffuser plate on the burner grate in such a manner as to minimize rattle of the diffuser plate and prevent accidental dislodgement of the plate from the grate.

Another object of this invention is the provision of an improved grate construction for preventing fusion of a glass 'baflle plate to an enameled grate during use.-

These, together with various ancillary objects and advantages of this invention will be more readily appreciated as the same becomes better understood by reference to the following detailed description when taken in connection wtih the accompanying drawings wherein:

Figure l is a top plan view of a burner grate having the diffuser plate mounted thereon;

Fig. 2 is a sectional view through the grate, taken on the plane 22 of Fig. 1; and

Fig. 3 is an enlarged sectional view through the burner grate and diffuser plate support ring taken on the plane 33 of Fig. 1.

The burner grate of the present invention is generally applicable for use on stove tops, in conjunction with the top burners thereon, and comprises an outer grate ring 10, preferably Shaped complementary to the opening in the stove top and herein illustrated as being generally rectangular in configuration. The grate ring is formed with a plurality of annularly spaced utensil support arms designated 11-18 respectively, which support arms extend inwardly of the grate ring to support a utensil.

Provision is made for mounting a diffuser plate 21 on the utensil support arms and in order to reduce rattling a United States Patent 0 of the diffuser plate on the support arms and also prevent accidental dislodgement of the diffuser plate from the support arms, the diffuser plate is mounted on a support ring 22 which is attached to the inner ends of the utensil support arms. More specifically, the utensil support ring 22 is mounted on the inner ends of three of the support arms which support arms, designated 11, 14 and 16 are annularly spaced from each other. The

remaining support arms

12, 13, 15, 17 and 18 extend inwardly toward the support ring 22 and terminate in spaced relation thereto.

The support ring comprises a flat annular portion 24 adapted to rest on the enlarged

inner end portions

110, 14a and 16a of the

support arms

11, 14 and 16 respectively, and a depending flange 25 formed on the inner edge of the flat annular portion. An inwardly extending ledge 26 is formed on the lower end of the depending flange 25 and extends inwardly of the'support ring to support the diffuser plate 21 thereon. As best shown in Fig. 2, the diffuser plate rests on the ledge 26 with the periphery thereof spaced inwardly from the depending flange 25. A flange 27 is formed on the outer periphery of the flat annular portion 24 and forms, in conjunction with the flat annular portion and the inner flange 25, a relatively rigid annular channel to inhibit distortion of the plane of the support ring 22. Notches 28 are formed in the upper edges of each of the enlarged inner end portions of the

arms

11, 14 and 16, inwardly of the inner ends thereof, to receive the outer flange 27 on the support ring when the latter is supported on the arms. Tapped bores 29 are formed in the enlarged inner end portion of each of the

arms

11, 14 and 16 to receive the support ring attaching bolts 31 and the fiat annular portion 24 0f the support ring is formed with annular depressions 32 around the bolt openings 33 therein so that the heads of the bolts 31 will lie flush with the upper surface of a support ring.

Since the relatively rigid diffuser support ring 22 is mounted on only three of the grate arms, it is apparent that unequal distortion of the grate arms from the normal plane thereof will not materially distort the plane of the support ring 22. If one or more of the

support arms

11, 14 or 16 should deflect out of the normal plane of the support arms, it will only cause a slight tilting of the support ring 22 so that the diffuser plate 21 mounted on the inwardly extending ledge 26 will uniformly contact the ledge and not tend to rattle. Further, since the support ring 22 completely surrounds the periphery of the diffuser plate, it is apparent that accidental dislodgement of the diffuser plate, as when moving a pan onto or off from the grate, will not readily occur.

The burner grate is generally formed of a cast material such as cast iron, and the grate support arms 11- 18 inclusive are formed integrally with the grate ring. In order to facilitate cleaning of the grate, the grate is customarily coated with an enamel indicated at 38 to provide a smooth surface which may be easily cleaned. The diffuser plate 21 is preferably formed of a transparent material such as the high silica glass sold under the trade name of Vyco-r, which glass has a low coefficient of thermal expansion and consequently does not readily fracture when rapidly heated or cooled. The glass tends to fuse with the enamel coatings customarily provided on grates and in accordance with the present invention, the diffuser plate support ring 22 is formed of a smooth stamped metal part which does not have an enamel coating. Consequently, the glass diffuser plate 21 does not tend to become fused with the grate during use, as occured in the previous grate constructions wherein the glass diffuser plate was supported directly on the inner ends of the enamel coated grate arms. The diffuser 'platetherefore remainsseparable from the burner grate to'enable cleaning of'the difiuser plate and grate.

I claim:

A burner grate eonstruetion for a gas burner comnrising' an enai'neleoated,grat'having an outer ring adapted tobe supported on a stove top and more thanthree"in wafdly extending annularly spaced arms, a set of three-of saidannularlysiaaeed arms extending radially inward of the otherof'said-arrns, a support ring having a fiat annular portion overlying the inner ends of said set of three arms, means for fasteningsaidfiat'portion to said set of 'three arrns," depending inner and outer flanges on the innet and oliter edges of said flat annular portion forming a-ohannel therewith, an inwardly extending-ledge portion on the lower edge of the inner flange, said set of three arrns having notches formed in the upper edges thereof for receiving the outer flange on the support ring; and a"glassdifffiser plate disposed on said ledge 'portion and spaced inwardly of the inner flange.

References Cited in the file of this patent UNITED PATENTS 951,088 Ziganek Mar. 1, 1910 1,567,870 SerVell -Q Dec: 29, 1925 2,075,108 Frick Mar. 30, '1937 2,148,777 Schneider et al. Feb. 28," 1939 2,172,469 Grigas Sept. 12,-1939 2,298,307 Parker Oct. 13, 1942 2,307,063 Parker .Q; "14.151115, 1943 2,361,317 Cathy-n0; Oct. 24, 1944 2,466,979 Bauer Apr. 13, 1949