GB1566382A

GB1566382A - Grate plate

Info

Publication number: GB1566382A
Application number: GB1280478A
Authority: GB
Original assignee: Claudius Peters AG
Current assignee: Claudius Peters AG
Priority date: 1977-03-09
Filing date: 1978-03-31
Publication date: 1980-04-30

Description

(54) A GRATE PLATE (71) We, CLAUDIUS PETERS AKTIENGESELLSCHAFT, a body corporate organised under the laws of the German Federal Republic, of Kapstradtring 1, 2000 Hamburg 60, German Federal Republic, do hereby declare the invention for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement: This invention relates to a grate plate and is an improvement in and modification of the invention disclosed and claimed in our application number 27345/76. (Serial No.

1521376).

In that application there is claimed a grate plate comprising a baseplate having a plural ity of wear resistant members positioned side-by-side across a front portion of said baseplate, the members and said baseplate having interengaging parts which enable the members to be slid into position across the baseplate and be retained therein thereby preventing any substantial relative movement between said members and said baseplate in both an upward/downward and a orward/b ackward direction.

One of the advantages of such a grate plate is that it does not require any separate means for fixing the wear resistant members to the baseplate, such as nuts and bolts or retaining hooks. However it is difficult to replace the wear resistant members once the grate plate is installed.

In accordance with this invention therefore we provide a grate plate as defined above wherein said baseplate includes an aperture of a size such as to enable said members to be inserted therethrough from above or below and thereafter slid across said baseplate by means of the interengaging parts, said baseplate having stops at opposite edges to prevent the outermost members sliding off the baseplate, and wherein one of said members has a rearwardly extending portion adapted to abut means on a grate plate support when the grate plate is mounted thereon to retain said one member in position in said baseplate.

In preferred embodiments of the invention to be described in detail hereinafter, the aperture is positioned centrally of the baseplate so that the wear resistant members can be inserted one after another and slid outwards of said aperture, said one member being inserted last which then retains all the other members in position in the baseplate.

In order that the invention may be fully understood, preferred embodiments thereof will now be described with reference to the accompanying drawings in which: Figure I is a section along the line A-B of Figure 3 and shows a grate plate in accordance with this invention and having a baseplate and a wear resistant member inserted therein; Figure 2 is a section through the grate plate along the line C-D of Figure 3; Figure 3 is a plan view of the grate plate; Figure 4 is a section along the line E-F of Figure 5 and shows another form of grate plate with a baseplate and a wear-resistant member inserted therein; and Figure 5 is a plan view of the grate plate of which Figure 4 is a cross-section.

The grate plate shown in Figures 1 to 3 comprises a base plate 1 having an inclined front portion and a flat rear portion. The front portion has across its width a channel 3 for receiving the rear portion of wear resistant members 4. The front edge of the front portion has air holes 2 and is shaped top and bottom to engage with the complementary shaped front portion of the wear resistant members 4 as shown in Figure 1, each of the members 4 having air holes which register with the holes 2 when the members are in position on the baseplate.

As shown in Figure 2, the baseplate 1 has a centrally positioned aperture 5 through which each wear resistant member may be inserted from above or below so that the rear portion of each wear resistant member is received in the channel 3 and the front portion engages the front edge of the baseplate 1. The wear resistant members are then slid across the plate one after another, the outermost member being prevented from sliding off the baseplate by stops 6.

When all the members except one have been inserted to the right and left of the aperture 5 the last member 7 is inserted.

This member has a rearwardly extending portion which locates beneath the central portion of the baseplate 1 and is retained in position by a T-bolt 8 engaging a hook 9 on the baseplate 1 to secure the baseplate to a grate plate support. As shown in Figure 2 the rearwardly extending portion of the wear resistant member 7 abuts the top of the T-bolt and is held between the bolt and the underside of the central part of the baseplate 1. The member 7 thereby keeps the other wear resistant members 4 in position and the engagement of the rear portion of the members 4 and their front portions with the front portion of the baseplate prevents removal of the wear resistant members 4 from the baseplate.

The sides of each wear resistant member is shaped as shown in Figure 3 to define elongate openings 11 which register with similar openings in the baseplate 1 to allow air to be circulated through the grate plate.

The central aperture 5 is of rectangular shape and is of a size sufficient to allow insertion of said members, one at a time, from above or below the baseplate 1.

An alternative form of grate plate is shown in Figures 4 and 5, the grate plate being similar to that shown in Figures 1 to 3.

Parts shown in Figures 4 and 5 that are similar to those shown in Figures 1 to 3 are primed.

The grate plate comprises a baseplate 1' having a rounded front edge 3 over which fits a complimentary shaped front portion of each wear resistant member 4' and 7'. The rear portion of each member engages a channel across the baseplate 1' in the same way as in the embodiment described with reference to Figures 1 to 3. The members 4' are inserted through a central aperture 5' in baseplate 1' from above or below and then slid slideways right and left of the aperture, the outermost members engaging stops 6' to prevent them sliding off the baseplate. The sides of the members 4' and 7' are shaped as shown in Figure 5 to provide elongate openings 10' above openings 2' in the baseplate 1' to allow circulation of air.

The central wear resistant member 7' has a rearwardly extending portion which locates beneath an inclined edge of baseplate 1' and abuts an edge 12 of a chair 13 on which the grate plate is mounted and retained by an anchor bolt whose head 14 is shown in a chain dotted line. The baseplate 1' has a depending hooked portion 9' which is engaged by the head 14 of the bolt to hold the grate plate on the chair. This particular method of mounting the grate plate is described in our specification number 1,464,694 to which reference should be made for further details of the mounting arrangement.

The wear resistant sections of this grate plate can be exchanged by loosening the anchor bolt and then moving the grate plate forward relative to the chair sufficient for the end of the extended portion of the member 7' to clear the edge of the chair thus enabling member 7' to be removed from the baseplate to allow one or more of the members 4 to be replaced.

WHAT WE CLAIM IS: 1. A grate plate comprising a baseplate having a plurality of wear resistant members positioned side-by-side across a front portion of said baseplate, the members and said baseplate having interengaging parts which enable the member to be slid into position across said baseplate and be retained therein thereby preventing any substantial relative movement between said members and said baseplate in both an upward/downward and a forward/backward direction, wherein said baseplate includes an aperture of a size such as to enable said members to be inserted therethrough from above or below and thereafter slid across said baseplate by means of the interengaging parts, said baseplate having stops at opposite edges to prevent the outermost members sliding off the baseplate, and wherein one of said members has a rearwardly extending portion adapted to abut means on a grate plate support when the grate plate is mounted thereon to retain said one member in position in said baseplate.

2. A grate plate as claimed in Claim 1, wherein said baseplate includes a hookshaped member for receiving a bolt to secure the baseplate to a support, the position of the hook-shaped member being such as to provide a space between the bolt when engaged therewith and the underside of said baseplate to receive said rearwardly extending portion of said one wear resistant member.

3. A grate plate as claimed in Claim 1 or Claim 2, wherein said aperture is located centrally in said baseplate and is of a size to accept one wear resistant member at a time.

4. A grate plate as claimed in Claims 1, 2 or 3, wherein the interengaging parts comprise a rebate below the top surface of the baseplate and the front portion has an end face with upwardly and downwardly

**WARNING** end of DESC field may overlap start of CLMS **.

Claims

**WARNING** start of CLMS field may overlap end of DESC **. a centrally positioned aperture 5 through which each wear resistant member may be inserted from above or below so that the rear portion of each wear resistant member is received in the channel 3 and the front portion engages the front edge of the baseplate 1. The wear resistant members are then slid across the plate one after another, the outermost member being prevented from sliding off the baseplate by stops 6. When all the members except one have been inserted to the right and left of the aperture 5 the last member 7 is inserted. This member has a rearwardly extending portion which locates beneath the central portion of the baseplate 1 and is retained in position by a T-bolt 8 engaging a hook 9 on the baseplate 1 to secure the baseplate to a grate plate support. As shown in Figure 2 the rearwardly extending portion of the wear resistant member 7 abuts the top of the T-bolt and is held between the bolt and the underside of the central part of the baseplate 1. The member 7 thereby keeps the other wear resistant members 4 in position and the engagement of the rear portion of the members 4 and their front portions with the front portion of the baseplate prevents removal of the wear resistant members 4 from the baseplate. The sides of each wear resistant member is shaped as shown in Figure 3 to define elongate openings 11 which register with similar openings in the baseplate 1 to allow air to be circulated through the grate plate. The central aperture 5 is of rectangular shape and is of a size sufficient to allow insertion of said members, one at a time, from above or below the baseplate 1. An alternative form of grate plate is shown in Figures 4 and 5, the grate plate being similar to that shown in Figures 1 to 3. Parts shown in Figures 4 and 5 that are similar to those shown in Figures 1 to 3 are primed. The grate plate comprises a baseplate 1' having a rounded front edge 3 over which fits a complimentary shaped front portion of each wear resistant member 4' and 7'. The rear portion of each member engages a channel across the baseplate 1' in the same way as in the embodiment described with reference to Figures 1 to 3. The members 4' are inserted through a central aperture 5' in baseplate 1' from above or below and then slid slideways right and left of the aperture, the outermost members engaging stops 6' to prevent them sliding off the baseplate. The sides of the members 4' and 7' are shaped as shown in Figure 5 to provide elongate openings 10' above openings 2' in the baseplate 1' to allow circulation of air. The central wear resistant member 7' has a rearwardly extending portion which locates beneath an inclined edge of baseplate 1' and abuts an edge 12 of a chair 13 on which the grate plate is mounted and retained by an anchor bolt whose head 14 is shown in a chain dotted line. The baseplate 1' has a depending hooked portion 9' which is engaged by the head 14 of the bolt to hold the grate plate on the chair. This particular method of mounting the grate plate is described in our specification number 1,464,694 to which reference should be made for further details of the mounting arrangement. The wear resistant sections of this grate plate can be exchanged by loosening the anchor bolt and then moving the grate plate forward relative to the chair sufficient for the end of the extended portion of the member 7' to clear the edge of the chair thus enabling member 7' to be removed from the baseplate to allow one or more of the members 4 to be replaced. WHAT WE CLAIM IS:

1. A grate plate comprising a baseplate having a plurality of wear resistant members positioned side-by-side across a front portion of said baseplate, the members and said baseplate having interengaging parts which enable the member to be slid into position across said baseplate and be retained therein thereby preventing any substantial relative movement between said members and said baseplate in both an upward/downward and a forward/backward direction, wherein said baseplate includes an aperture of a size such as to enable said members to be inserted therethrough from above or below and thereafter slid across said baseplate by means of the interengaging parts, said baseplate having stops at opposite edges to prevent the outermost members sliding off the baseplate, and wherein one of said members has a rearwardly extending portion adapted to abut means on a grate plate support when the grate plate is mounted thereon to retain said one member in position in said baseplate.

facing projections and each member has a rearwardly projecting tongue cooperating with the rebate and recesses cooperating with the projections at the front end face of the baseplate thereby securing each member against upward/downward and forwards backward movement relative to the baseplate.

5. A grate plate as claimed in any one of the preceding claims, wherein the baseplate has slot-shaped openings in its top surface and/or in its front end face for passage of cooling or combustion air or other fluid.

6. A grate plate as claimed in Claim 5.

wherein the members are formed with waists for forming openings that register with the openings in the baseplate when the members are assembled side-by-side On tlle baseplate.

7. A grate plate as claimed in Claim 5.

wherein the members have openings in their front end faces. which register with openings in the front portion of the baseplate when the members are assembled side-byside on the baseplate.

8. A grate plate substantially as hereinbefore described with reference to Figures 1, 2 and 3 of the accompanying drawings.

9. A grate plate substantially as hereinbefore described with reference to Figures 4 and 5 of the accompanying drawings.