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Publication numberUS2442349 A
Publication typeGrant
Publication dateJun 1, 1948
Filing dateNov 6, 1945
Priority dateNov 6, 1945
Also published asDE864088C
Publication numberUS 2442349 A, US 2442349A, US-A-2442349, US2442349 A, US2442349A
InventorsExum Raymond E
Original AssigneeAllied Chem & Dye Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Heat insulating device for coke oven doors removed by door handling machines
US 2442349 A
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Description  (OCR text may contain errors)

June 1, 1948. R E EXUM 2,442,349

HEAT INSULATING OEVICE FOR COKE OVEN DOORS REMOVED BY DOOR HANDLING MACHINES 6 Sheets-Sheet 1 Filed Nov. 6, I 1945 .16 15 /i. LL L 25 19'"- INVENTOR faymondfll'xum/ ATTORNEY June 1, 1948. R. E. EXUM 2,442,349

HEAT INSULATING DEVICE FOR COKE OVEN DOORS REMOVED BY DOOR HANDLING MACHINES Y Filed Nov. 6, 1945 6 Sheets-Sheet 2 |NVENTOR faymond El'xam/ ATTbRNEY June 1, R. E. EXUM HEAT INSULATING DEVICE FOR COKE OVEN DOORS REMOVED BY DOOR HANDLING MACHINES Filed Nov. 6, 1945 6 Sheets-Sheet 3 INVENTOR Kaymondlfflzam ATTORNEY June 1, 1948. R. E. EXUM 2,442,349 HEAT INSULATING DEVICE FOR COKE OVEN DOORS REMOVED BY DOOR HANDLING MACHINES Filed NOV. 6, 1945 6'Sheets-Sheet 4 L I 59 I I 110 68- I i :62 89 215: 92 84-- ?s I 85 82" f 29 77' INVENTOR v KayflwmiELE'xam ATTORNEY 2m 1, 1948. R EXUM 2,442,349

HEAT INSULATING DEVICE FOR COKE OVEN DOORS REMOVED BY DOOR HANDLING MACHINES I Filed Nov. 6, 1945 6 Sheets-Sheet 5 l I I I I I l I l I I I I I I I I L. I? I I Q II Q I I II 5 I I8 :I I I I I. I I I 1 Q 4 J w I INVENTOR .JPaymofldEExam ATTORNEY Patented June l, 1948 HEAT INSULATING DEVICE FOR COKE OVEN DOORS REMOVED BY DOOR HANDLIN m cnmas Raymond E. Exum, East Orange. N. .L, assignor to Allied Chemical & Dye Corporation, a corporation of New York Application November 6, 1945, Serial No. 626,948 11 Claims. (01. 202-248) This invention relates to door handling machine and more particularly to coke oven door handling machines.

Door handling machines of the type to which this invention relates are moved into position to engage the-door of a coking chamber from which coke is to be pushed and the machine then operated to engage the door of the chamber and move the same outwardly away from the chamber. These machines are of two types in one of which the door is moved away from the coking chamber in a direction in line with the longitudinal axis of the chamber and in the other of which the door in addition to so being removed is also swiveled, usually through a 90 arc.

In both types of machines as heretofore constructed the door when removed from the coking chamber is subjected to atmospheric conditions. Hence in operation it is periodically subjected to the high temperature conditions prevailing in the coking chamber and then to atmospheric conditions. This causes the refractory lining or lug section of the door to crack and spell from repeated heating and exposure to atmosphere.

It is an object of this invention to provide a door handling machine which is constructed and designed to shield the refractory plug section of the door after it is removed from the door opening so as to retard heat losses from the plug section and maintain it at a more uniform tsmperature, thereby minimising cracking and spelling of the refractory materiai. Other objects and advantages of this invention win be apparent from the following detai'ied description,

in accordance with invention a coke oven door handling machine is provided with a heat insulating shield which enveiopsthe face and sides of the refractory plug section when the door is removed from the coking chamber opening materially reducing loss of heat from the reiractcry plug while the door is supported by the door handling machine, Hence in operation the machine of this invention maintains the refractory plug section at a more uniform temperature than in prior known constructions minimizing cracking and spelling thereof.

In the preferred embodiment illustrated on the drawings the invention is shown incorporated in a coheoven door handling machine having a reciprocatory ram and the present description will be confined to the present illustrated embodiment of the invention. It will be understood, however, that the novel features and improvements are susceptible to other applications, such, for example. as machines for handling doors having refractory or other parts which tend to crack when subjected to temperature chances other than coke oven doors and to coke oven door handling machines of the type in which the head carrying the door engaging hooks is so mounted that it may be swiveled. Hence the scope of this invention is not confined to the embodiment herein described.

In the accompanying drawings:

Figure 1 is a perspective fragmentary view of a door handling machine showing the shield in open position;

Figure 2 is a perspective view of a door handling machine showing the shield in closed position;

Figure 3 is a fragmentary side elevation of a preferred form of door handling machine embodyingthis invention;

Figure 4 is a front elevation of the machine of Figure 3 showing the shield in closed position;

Figure 5 is a'composite plan view of the machine of Figures 3 and 4 showing the machine in position to remove the door with the shield in open position; the left hand half of Figure 5 is a plan view taken in a plane passing through line t-t of Figure 3 and the right hand half is a plan view taken in a plane passing through line 5'-5' of Figure 3;

Figure 6 1s a composite plan view similar to Figure 5 except the machine is shown in door removed position with the shield closed; and

Figure '3 is a vertical section, partly in elevation, of a detail, namely, the spring type connectic-n employed in the mechanism for opening and closing the shield.

Referring first to Figures 1 and 2 of the draw ing, in which the invention is somewhat diagrammatically illustrated, reference character it indicates a reciprocating ram carrying a head 2 on which is pivotally mounted, as at it, an upper door engaging hook it and as at it a lower door engaging hook IS. The ram is mounted for reciprocation on a truck (not shown). For example, the head carryin the door engaging hooks may be of the type shown in greater detail in Mclntire Patent 1,966,075 of July 10, 1934, or Potter Patent 2,183,753 of December 19, 1939.

In Figure 1 the coke oven door I! is of the selfsealing type and consists of an outer refractory plug section i8, a supporting frame [9 and a self-sealing frame 20. The door is shown in this figure in the position it occupies relative to the parts of the door handling machine when it is about to be removed from the door frame surrounding the coking chamber opening. The door 3 shown in the drawing is provided with a removable sealing frame 20 which has expansion joints 2| therein, as more fully disclosed and claimed in my copending application Serial No. 615,885

flied September 12, 1945. It will be understood, however, that this invention is applicable to the handling of any door having refractory or other lining which tends to crack when subjected to temperature changes.

Upper and lower bracket supports 22, 23 are fastened to the door head I! at the sides thereof and extend from the head horizontally in a direction towards the door as shown in Figure 1. Two pairs of such supports are employed, one at each side of the head; only one pair, however, is shown in Figure 1 of the drawing. A pair of shield members 26 is pivotally mounted at opposite sides of the head on these bracket supports as hereinafter described. Each shield member consists of a curved or arcuate shaped member of a height approximately equal to the full length of the refractory plug section of the door and of a transverse extent such that when both members are closed a shield is formed completely enveloping the sides and face of the refractory plug section. Each member may consist of an outer metal plate 25 having cemented or otherwise secured thereto a lining of heat insulating material 26. The heat insulating mate-rial 26 may be asbestos or other suitable insulation capable of withstanding the high temperatures to which the plug section of the door is subjected.

A hinge 2! in the shape of a bell crank lever has one end pivoted as at 28 to the bracket support 22 and the other end secured to the shield member M on the left hand side of the door, viewing Figure 1. A lower hinge 29 also in the shape of a bell crank lever has one end pivoted as at 30 to the lower bracket 23 and the other end secured to the shield member 26. The shield member on the right hand side of the door is similarly mounted on the pair of bracket supports on that side of the door head.

A pair of uprights 3!, only one of which, however. is shown in the drawings, is fixedly mounted on the carriage of the door handling machine, on opposite sidesof the reciprocating ram I i. Since the operating rod and cam structure associated with each of these uprights is the same only one such structure will be described in detail. Each of these uprights has an opening 32 in thelower portion thereof through which extends a rod 33 one end of which is threaded and has disposed thereon a nut 34, and the other end of which is pivotally secured as at 36 to the lower hin e 29. The nut 34 is adjustable and is so positioned on the rod 33 that the shield members 24 may be swung away from the face of the refractory lining in time to allow entrance of the plug section into the coking chamber opening. Mounted on the upper portion of each upright 3| is a cam roller 31 positioned to engage the upper hinge or other portion of the shield members, as shown in Figure 2. The cam roller 31 is mounted in a suitable support 38 carried by the upper portion of the upright 3|.

In operation the two leaves 26 of the shield are in open position when the door engaging hooks l4, l6 engage the door as shown in Figure 1. Upon retraction of the door from the coking chamber opening by reciprocation of the ram II in direction away from the coking chamber, rods 33 slide through openings 32 in the fixed uprights 3| on opposite sides of the machine. In the continued movement of the ram the upper hinges on the shield memoers engage the cam rollers 31 causing the shield members or leaves to pivot about 28 and 30 to close and form a shield completely enveloping the face and sides of the refractory plug section iii of the door, as shown in Figure 2. The shield is maintained closed about the plug section throughout the remainder of the reciprocating motion of ram H in a direction away from the coking chamber and remains in this position until the door is about to be seated in the coking chamber opening.

As shown in Figure 2 the right hand leaf 26 may be provided with a flange 39 extending the full length thereof, overlapping a ledge 50 on the left hand leaf 28 and forming a closure along the length of the meeting line of the two leaves. It will be noted from Figure 2 that the inner edges ll of the leaves 26 are disposed opposite the inner side edges 52 of the refractory plug so that the sealing frame 20 is readily accessible from the front of the machine, even though the shield is in closed position. Hence an operator by means of the usual cleaning tools can remove any carbonaceous or tarry material adhering to the sealing frame 26 even though the shield is closed.

When it is desired to replace the door in the coking chamber opening the mm H i is moved in a direction opposite to that hereinabove described. In the initial portion of this movement rods 35 slide through openings 32 in the uprights 3|. When the door reaches a position in front of and close to the door frame, nut 3d engages the uprights 3| preventing further movement of rods 33 in the direction towards the coking chamber. Upon continued movement of the ram the shields are swung into open position by the action of rods 33 pulling on the hinges 29 due to the fact that the rods cannot move forward since nuts 34 engage the uprights 3l. Further movement of the ram moves the door past the open shield members 26 into seating engagement with the door frame.

Preferably plates (not shown in Figures 1 and 2 but shown in Figures 5 and 6) are disposed at the top and bottom of the shield to cover the top and bottom portions of refractory plug section when the shield is in closed position and prevent circulation of air in the space between the shield and the refractory plug section which circulation would tend to cool the refractory plug. Such plates may be suitably fastened to the top and bottom portions of one of the shield members and extend laterally in a, direction towards the other shield member and may be so dimensioned as to completely cover the space between the two shield members when they are in closed position;

Referring now to Figures} to 7, inclusive, in which is shown a door handling machine embodying a preferred form of this invention, reference character 50 indicates a reciprocating ram, the bottom of which rests and travels on the guide rollers 5| suitably journalled in bearing supports on the carriage or truck of the door handling machine. This carriage or truck may be of any conventional type. Suspended from the forward portion 52 of ram 50 by suitable linkage mechanism indicated by the reference character 53 is a door engaging head 54 provided with top and bottom pivoted hooks 55, 56 for engaging the door 51 and lift and carry the weight of the door. Movement of the hooks 55, 56 about their pivots is effected by suitable mechanism of any conventional type, which mechanism is not shown on the drawings in the interests of clarity. When these hooks are actuated to engage and lift the door theseal between the door and door frame is broken and the weight of the door transferred to the hooks on the door head 54.

The specific design of the door head, the ram, the connection between it and the ram, the mechanism for operating the door hooks for engaging the door, and the door are not features of this invention. My invention may be embodied in a door handling machine having any suitable door head associated with a movable ram or other part for moving the head and for engaging any suitable type of door, and hence it is believed no useful purpose would be served by describing these parts of the .doorhandling machine and of the door in greater detail, except to note that in the embodiment shown onthe drawings the door is constituted of a refractory plug section a, a sealing frame b and an outer supporting section consisting of two longitudinally extending channel irons, Fi 6.

Secured to the structural framework of the cars riage of the door handling machine at opposite nel irons 62. As shown in Figures 3 and 4 the channel irons 59, 62 form a pair of tracks on each side of the machine on which tracks travel wheels 84 of a carriage 55. As clearly appears from Figures 4, 5 and 6 two such carriages are employed, one at each side of the machine; since the structure of both carriages and associated parts are the same only one wilLbe described hereinafter in detail. 7

Referring to Figure 3 spaced supports 99, 61 are welded or otherwise suitably secured to the forward edge of each carriage 65. A shaft 58 is, journalled in the supports 66, 61 of each carriage so it can freely rotate. The leaves 10, H (Figures 4 and 6) of the shield are pivotally mounted on the shafts 58. Each leaf has fixed thereto an upper extending web 12 (Figure 3) provided with a bearing I3 into which the shaft 68 extends for free rotation therein and a lower web 14 provided with a bearing I5 into which the-shaft 68 extends and is freely rotatable therein. Thus both leaves of the shield are mounted for free pivotal movement about the shafts 68. Hence when it is desired to open the shield for any purpose by breaking the connection between the shield and the mechanism, hereinbelow described, for opening and closing it, the leaves of the shield may be moved about their pivotal supports on shaft 58 and thus opened to give access to the door lining a.

The form of mechanism for opening and closing the shield, shown in the drawing, is described below; it will be understood the invention is not limited to this form of mechanism but other means for opening and closing the shield may be used. Since the parts on one side of the machine in the embodiment shown in Figures 3 to 6, inclusive, are substantially the same as those on the other, the mechanism on one side only is described in detail below; like reference characters have been used for like parts on opposite sides of the machine. This mechanism involves a bell crank lever 15 (Figure 3) one end of which is secured to a leaf or II as the case may be, by pin 11 extending through an opening in the lever and through an aligned opening in a bracket 6 18 welded or otherwise suitably secured to th leaf.

By removal of pin 1'! from the aligned openings in the bell crank lever 78 and bracket I8, the connection between the leaf of the shield and the moving mechanism therefor herein below described may be broken to permit manual opening of the shield when it i desired so to do. Each pin 11 is preferably secured by a chain 92 to the leaf of the shield with which it is associated to prevent loss thereof when it is desired to remove it from the aligned openings in lever I9 and bracket I8.

The other end of the bell crank lever 19 is integral with a bearing I9 keyed to shaft 98. In the embodiment of the invention shown in the drawings the bell crank lever 16 consists of an arm having one end secured to a leaf of the shield as hereinabove described and the other end secured to a bushing 89. A pair of arms 8i forming the other part of the bell crank lever 16 extends from the bushing 95 to the bearing 19, the ends of these arms being formed integral with the bearing 19.

Keyed to each shaft 58 is a bearing member 93 which is suitably connected through a spring cushioned connecting member 94, hereinbelow described in detail, with a lever arm '85 (Figures 5 and 6). A pin 99 extends through an intermediate point of this lever arm and has pivotally mounted on one end thereof an end of the connecting member 94. As shown in Figures 5 and 6 lever arm 95 has one end pivoted as at 81 to the carriage 95. A cam roller 89 is suitably mounted on the other end of lever arm 95. A second spring cushioned connecting member 89 (Figure 3) has one end pivotally mounted on the other end of pin 85. The other end of connecting member 89 is pivotally fastened to one end of a short lever 90 (Figures 5 and 6). The other end of lever 99 is rotatably Journalled on the shaft 89 through a bearing member 9! freely rotatable on the shaft 89. Extending from this bearing member Si is a connecting web 92' fastened to or integral with the leaf Ill or H, as the case may be, and also a lever arm 92 which has mounted on-the free end thereof a, cam roll 99 traveling in a cam track 93' secured to the underside of channel iron 62. Cam track 93' consists of a relatively long straight portion 930 terminating in a curved portion 93b which has a stop 930 at its end.

Levers 90, 92 in effect form a bell crank lever.

pivoted about shaft 68 and actuated by the spring cushioned connecting member 89.

Each of the spring cushioned connecting members, as shown in Figure '7, comprises a rod 94 having one end threaded into a housing 95 and the other end provided with an opening 96 for pivotal engagement with a pin or other part to which it is connected as hereinabove described. A look nut 91 is provided to lock the rod 94 into any position in which it may be moved to adjust the length of the rod to provide a connection of any desired length as will be understood by those skilled in the art. The housing has a compression spring 98'therein which is maintained under desired compression by a cylindrical sleeve 99 in slidable engagement with the otherwise open end of housing 95 and maintained in desired position by a lock nut IOI threaded on rod 94. A strap mem'ber I02 has one end welded or otherwise fastened to housing 95 and has a pin receiving a lump of coal or coke, to the closing of the leaves of the shields be encountered, increased pressure is exerted on the springs 88 in the connecting members 88 thereby, avoiding damage to the linkage and other mechanism efiecting closing of the leaves of the shield.

Secured to the head 58 on each side thereof, as shown in Figures and 6, is a cam track I88 on which travels the cam roll 88. At the end I88 of each cam track I88 an opening I88 is provided for receiving the cam roll 88. One wall of this opening is defined'by a stop member I81 w.hich extends above the level of the cam track I As shown in Figure 5 the .top and bottom of each leaf is provided with a plate I88 preferably formed integral with the front and sides so that when the shields are closed the top andbottom of the refractory lining for the door is covered minimizing circulation of air over the refractory plug. The forward portions of the leaves of the shield may be provided with handles I88 to facilitate manipulation of the leaves when desired. As in the embodiment of Figures 1 and 2 the inner surfaces of the leaves of the shield are provided with asbestos or other suitable heat insulating material to minimize flow of heat from the refractory plug when enveloped by the shield.

As shown in Figure 5 the coking chamber opening III is defined by the door frame I I2 carrying the latch hooks H8 which are engaged by the latch bars II8 on the door to maintain the door in sealed position. When it is desired to remove the door the latch bars are first moved out of engagement with the latch hooks and the door then engaged by the door engaging hooks on the door head and removed thereby from the door opening.

In operation assuming the parts to be in the position shown in Figure 6 with the shield closed, cam tracks I88 and the carriages 88 on opposite sides of the machine move in a direction towards the coking chamber opening III. Cam roll 88 during this movement is disposed in recess or opening I88 and cam rolls 88 travel in the straight portion 88a of cam track 88', so that no movement of the mechanism for opening the shield takes place. When the cam rolls 88 begin their movement through the curved portions 88b of the cam tracks 88' they cause through leaves 82. 88. and connecting member 88 movement of lever arms 88 about their Pivots 81 to the left viewing Figure 6 so that in the continued movement of the parts the cam rolls 88 move out of the openings I88 in the cams I88. Upon further movement thecams I88 travel with the head of the machine over the cam rolls 88 and the cam rolls 88 travel through the curved portions 882) of the cam track 88 until they reach the stops 880; this further movement causes movement of the lever arms 88 which through the spring pressed connections 88 rotates the bearin s 88 keyed to shafts 88, the bearings I8 also keyed to shafts 88 being rotated to swing the leaves of the shield into open position as shown in Figure 5 permitting the placement of door into the coking chamber opening III.

When it is desired to remove the door the ram 88 is moved in the opposite direction to that hereinabove described. As the ram moves toward the right viewing Figure 5 the cam tracks I88 on the head 88 move therewith over the cam rollers 88 until the openings I88 in the cam tracks I88 are reached at which point the rollers 88 enter the openings I88, locking the carriages 88 to the head so that they move therewith. Further movement of the head to the right causes (a) the stops I81 to engage cam rollers 88am! (b) the cam rollers. 88 to leave the curved portions 88b of the cam tracks 88'. As-this movement to the right continues the levers 88 are swung in the opposite direction to that hereinabove described closing the leaves of the shield.

The length of the cam tracks I88 and the position of the cam tracks 88' including the curved portion 88b are such as to stop forward movement of the shield at a point near and in front of the door opening such that the shield may be opened without movement of the shield being chstructed by any part of the coke oven battery, additional forward movement of the ram placing the door in sealing engagement with the door frame. Further these parts are designed so that. as above described, the door is removed from the door frame and moved past the door shield before any closing movement of the door shield takes place.

It will be noted this invention provides a coke oven door handling machine designed to envelop the refractory plug section of a coke oven door with a shield which minimizes loss of heat from the refractory plug section of the door when the door is removed from the coking chamber opening thereby maintaining this portion of the door at a more uniform temperature increasing the effective life thereof,

It is to be understood that this invention is not restricted to the present disclosure otherwise than as defined by the appended claims.

What is claimed is:

1. A coke oven door handling machine for a coke oven door having a refractory plug section. in combination, a head. means on said head for engaging the door, a pair of shield members on opposite sides of said head constructed and arranged to permit movement of the door between said shield members. and means for opening the shield members when said head is moved in a direction towards a coking chamber and for closing said shield members when said head is moved in a direction away from the coking chamber.

2. A coke oven door handling machine as defined in claim 1, in which the shield members are lined with heat insulating material.

3. In a coke oven door handling machine for a coke oven door having a refractory plug section comprising, in combination. a door head, door engaging hooks pivotally mounted on said head. a pair of shield members on opposite sides of said head constructed and arranged to permit movement of the door between said shield members, and means for moving said shield members to envelop the head and sides of said refractory plug section after said head and the door carried thereby is moved in a direction away from a coking chamber past said shield members, and means for moving said shield members to open the same when said head and door carried thereby is moved in a direction towards the coking chamber to permit movement of said door past said shield members into position to be seated to close the coking chamber opening.

4. In a coke oven door handling machine for a coke oven door having a refractory plug section comprising. in combination, a door head. door engaging hooks pivotally mounted on said head. a pair of heat insulated shield members. each of a length approximately equal to the length of the refractory plug section pivotally mounted on opposite sides of the door engag g head, and s pair of cams for effecting movement of the shield members when the door head and doorcarried thereby are moved away from a coking chamber to close the shield members about the face of the refractory plug section. v

5. In a coke oven door handling machine for a coke oven door having a refractory plug section comprising, in combination, a door head, door engaging hooks pivotally mounted on said head, a pair of heat insulated shield members, each of a length approximately equal to the length of the refractory plug section pivot-ally mounted on opposite sides of the door engaging head, and a pair of cams for closing the shield members when the door head and door carried thereby are moved away from a coking chamber and for opening the shield members when the door head and door carried thereby are moved towards the coking chamber.

6. In a coke oven door handling machine for a self-sealing coke oven door having a refractory plug section, in combination, a reciprocating ram, a door head carried by said ram, a pair of door engaging hooks on said head, a pair of shield members pivotally mounted for swinging movement at the sides of said head, a pair of fixed supports on said machine, operating rods extending through openings in said supports, each rod having one end attached to a shield member and having a stop at the other end which stops are adapted to engage the said uprights, and a pair of cams carried by said uprights constructed and arranged to engage the shield members to move the same into closed position when the door is retracted from a coking chamber, said operating rods effecting opening of the shield members when the door is moved towards the coking chamber opening.

10 chamber for moving said insulating means to envelop the face and sides of said refractory plug section.

9. A coke oven door handling machine for a coke oven door having a refractory plug section, comprising, a door head, means on said door head for engaging the door, means for moving said door head to remove the door from a coking chamber, a pair of shield members on opposite sides of said door head constructed and arranged to permit movement of the door between said shield members, and means for moving said shield members when said door is removed from the coking chamber to envelop the face and sides of said refractory plug section.

10. A coke oven door handling machine as defined in claim 9, in which the shield members are lined with heat insulating material.

11. A door handling machine for a door having,

closed position, heat insulating means on opposite sides of said door, said heat insulting means adapted to be opened to permit said door to pass therebetween and to be thereafter closed to substantially completely envelop said portion of the door which tends to deteriorate when subjected to temperature changes, means for closing said heat insulating means when said door engaging means removes said door from said closed position so that said heat insulating means envelops said portion which tends to deteriorate when subjected to temperature changes to minimize loss of heat therefrom and for opening said heat insulating means to permit return of said door to said closed position by said door engaging means.

RAYMOND E. EXUM.

REFERENCES CITED The following references are of record in the file of this patent:

Kiehi et a1 Sept. 26, 1944

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2026165 *Aug 1, 1934Dec 31, 1935Libbey Owens Ford Glass CoProcess and apparatus for producing case hardened glass
US2183753 *Aug 13, 1936Dec 19, 1939Louis WilputteCoke oven door machinery
US2359222 *Mar 1, 1941Sep 26, 1944Corning Glass WorksMeans for tempering glass articles
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4372820 *Feb 17, 1981Feb 8, 1983Wilputte CorporationChuck door for coke oven pusher side door and heat radiation shield
US4600348 *Jul 9, 1984Jul 15, 1986Pettit Earl OPanel hoist
US7077618 *Feb 22, 2002Jul 18, 2006Uhde GmbhDevice for lifting and removing oven doors of a cooking oven
Classifications
U.S. Classification202/248, 49/109, 49/249, 49/257
International ClassificationC10B25/00, C10B25/14
Cooperative ClassificationC10B25/14
European ClassificationC10B25/14