US2435006A

US2435006A - Door for pressure compartments

Info

Publication number: US2435006A
Application number: US735283A
Authority: US
Inventors: Richard E Jeffery
Original assignee: MARKET EORGE Co
Current assignee: MARKET EORGE Co
Priority date: 1947-03-18
Filing date: 1947-03-18
Publication date: 1948-01-27
Anticipated expiration: 1965-01-27

Description

Jan. 27, 1948. R. E. JEFFERY DOOR FOR PRESSURE COMPARTMEN'I S 2 Sheets-Sheef Filed March 18, 1947 zzverzzor, Rickard E lief/e729 M an Jan. 27, 1948.

R. E. JEFFERY DOOR FOR PRESSURE COMPARTMENTS 2 Sheets-Sheet I a Inventor,

Ric/Zara .27 J6 Filed March 18, 1947 Att ys Patented Jan. 27, 1948 UNIL'IED- STAT ES PATENT OFFICE D6013? FOR; PRESSURE COMPARTMENT-S' Richard E. Jeff o y, Maldem. Mass., assignor. to Market. EorgeCompany, Everett-Mass a corporation ofMas saohusetts' Ai-pplicatiomMarch 18, 1947, SeriaYNo; 7355283 8, Claims.r (01; 126 -20).

T is i vention ates todoojrs and merchantticulafly-to-that typeof door'used in Pressure teamers or: the like: having compartments into which. live steam is; admitted? and maintained: at moderate pressures; the present: application beingacontinuation inepart of: my copending application; Serial. No; 649,109. filedi February 20 1946,, now abandoned:

One,- obiect of" the: invention. is. to provide. a door for sealing a compartment- Oil the v:type; described and. forpreyenting. the escape: of;- the live steam. while entering: andiafter:- admission to: the: compartments Another: obj eat of: the; vention is tovproyide: az.doorrof'.theitypecdesoribed which is of simple-,1 durable, and: light: construe: tion; inexpensive; and: easy. to; manufacture; easy to. operate and; which; possesses: a: minimum; of. partsssubject to; deteriorationafromthe heat and moisture: associateds with, the: use. of live: steam; said parts; being; quickly; and inexpensivelyure'e placed. Still:anotherobiectiofi the invention is to. provide a. door ofthe. type' described which will insure the attainment of? the-highest: standrd? of cleanliness; and freedom: from; sources. of contamination. andv obnoxious" cooking odors;

According to; the: present: invention the. door comprises a closure member having;- a:. marginal portion similar to: but: largen than: a: compartment opening;. gasket supportingz means similar to. but larger than saidi opening. beingmounted on the outer; surface. of? the closure. memben and havingra peripheral portion .ofisetrelativethereto, a. frame-like gaskethaving: an: inner peripheral: portion formed with: a1 continuousgroove definingv atapering. wali and fitting about the supporting-imeans. with said: offset portion: ex tending: into; the groove,:.the.-.facesof saidgasketv beingainterposed between thamarginal portions of.- theclosure member and opening; .and a:gask-t retaining 1 member abutting the outer periphery of: the, gasket. so thatwheni pressure-is admitted to .the compartment; it. exerts1:.a;fprcee against the tapered wall ofthe gasket. to wedge'it down-e 2. partment and before suiiicientpressure has been generated therein to. exert a. wedging force against the inner periphery. of the gasket. The gasket may alsohave a beveled outer periphery i juxtaposed to. the gasket retaining member. to

provide a more efficient fit therebetween.

In. still another. aspect the lower portion of the. gaskethas at least. one passage afiording communication between the bottom of the roove and the outer periphery of the gasket which abuts. the gasket retaining member; the parts being so constructed and arranged. that when pressure. isadmittedto-the compartment it exerts a force against the taperingwall of the gasket. to --wedg e the gasket downwardly against themarginal portion of the opening and outwardly againstthe gasketeretaining member to seaLtheopening-and passage, and .when'the door is opened. and the pressure released any condensate. collected between the tapering wall and supporting means will drain by force of gravity tothebottom ofthe groove, through the passage and.thence out of. the door between the gasket and. gasket.-retaining member.

For the purpose of, illustration reference is made. tothe. following detailed description and drawings in which,

Fi .1- isa perspeotiveview of one embodiment of. the invention;

Fig.2 is-av cross section. of the. gasket of the embodiment of. Fig. 1

Eig..3.-is a facev-iew of the gasket of Fig. 2-;

Fig. l. is. atop face view ofthe cover in the embodiment of Fig. 1;

Fig. 5 isz- 8.201055. section along lines- 5'--5 of i 4;,

Fig. 6;. isa fragmentary face view" of a lower corneroif a: modified embodiment of the gasket of. Fig. 3.;

Eig. 7. isia cross-section of a modified embodiinept-of. the inventiontaken along the lines l -7 ofiEig; i withthe modified gasket of Fig. 6; and

Eig; iidsanenlarged view-similar to Fig. 7 but showing; the relationship 0f: the parts when the door. i-sin ope ixposition;

Referring to Eig. 5-, the numeral: designates marginal. portions of a steamer compartment defining a -.compa.rtment opening 2. Al closure member 3: having marginal portions 4' similar tobutlarger than said opening-#2 is'removably juxtaposed to. the opening: A dome-shaped cover Sis-mounted; adjacent to: its edgeii,- to'the outer edgeor: the; marginal portions 4' of the closure member by suitable=means such as; a; weld; said. edge: 6: "extending downwardly to form a gasket retaining member I. A gasket supporting plate 8, similar to but larger than the opening 2, is secured to the outer surface ofthe closure member and has a peripheral portion 9 offset relative thereto to receive and support a resilient frame-like, preferably neoprene, gasket l0.

Referring to Figs. 2 and 3, the gasket Ill has in cross section an approximately Y-shaped inner periphery ll defining a continuous groove adapted to fit about the gasket supporting plate 8 with the peripheral portion 9 extending into the leg of the Y. The gasket I further has a beveled outer periphery l2 abutting the gaskethas inwardly diverging faces l3 and I4 interbegins to deteriorate from the exposure to the posed between the marginal portions of the 010- sure member and opening as shown in Fig. 5.

Referring to Fig. 5, reinforcing channel frame [5 is disposed within the dome-shaped cover in spaced relation to the closure member, the opposed edges of said frame extending outwardly, in opposite directions, through slots l6 formed in the cover to provide two projecting members i! and IS. The frame is secured to the cover, at the slots, by suitable means as a weld.

To provide a butt hinge for the above described door, a plate I9 is secured by a weld to the upper face of projecting member I! and to the cover 5 and has a projecting loop to which is socured, in a similar manner, an elongate collar 2 l. The collar is adapted to fit between complementary spaced ears 22 mounted on the compartment end, and is there pivotally held by a pivot 23 as shown in Fig. l.

A handle 24 is provided on the opposite side of the door and comprises two spaced post members 25 and a connecting bar 26, the bases of the posts extending through openings 21 in projecting member l8 and there secured by means of a wed, A pair 'of spaced cover lates 28, each provided with openings 29 through which the posts 25 extend, are secured at one end 30 to the cover 5 above and adjacent to the slot l6 and extend outwardly beyond-the posts, at which point they are bent downwardly, and inwardly, the opposite ends 3| being welded to the cover to the edge 6.

To provide means for locking closed the abovedescribed door, a tongue 32 is disposed between said spaced cover plates and comprises a plate 33 secured by a weld to the cover below and adjacent slot 16 and extending outwardly and upwardly to a point adjacent the bend of said spaced plates where it is similarly bent downwardly and inwardly and secured to the edge 6 of the cover. A complementary locking clamp 34 ispivotally mounted on the compartment, as shown in Fig. 1, and is adapted when the door is closed to clamp over the tongue 32 to lock the door closed.

From the foregoing it is evident that when the door is in closed and locked position as shown in Fig. 5, the faces l3 and M of the gasket have already been pinched between the marginal portions of the c osure member and opening to create a seal. On admission of steam to the compartment, the .pressure within the compartment exerts a force against the lower arm of the Y- shaped inner periphery of the gasket to wedge the gasket downwardly against the marginal por tions of the opening and also outwardly against the gasket retaining member 1 of cover 5 so that the seal is increased in strength with the increase in pressure for preventing the escape of steam from the compartment.

It is further evident that when the gasket I 0 heat and moisture of the live steam, it may be removed quickly and inexpensively by merely slipping the inner periphery of the gasket out of the offset peripheral portion of the supporting plate and inserting a new gasket by the reverse procedure.

Referring to Figs. 6, .7 and 8, the embodiment shown therein, except as hereinafter pointed out, is substantially the same as that previously described and the same or similar reference numerals are applied t corresponding parts. In this embodiment each marginal portion 4 of closure member 3 is provided at its periphery with a gasket-retaining flange 34 inclined inwardly toward the marginal portion 1 of the compartment.

The outer face of the flange abuts the inner face of the member I and is secured thereto by suitable means, as a, weld. The inner face of the flange provides a complementary surface abutting the beveled outer periphery l2 of a modified gasket ll] when the door is in closed position as shown in Fig. 7. The lower portion of the modified gasket It is provided intermediate its ends with a passage 35 affording communication between the bottom of the leg of the Y of the inner periphery H and the beveled outer periphery l2 which abuts the gasket-retaining flange 34. When the door is in closed and locked position as shown in Fig. 7, the beveled outer periphery l2 isforced against the gasket-retaining flange 34 to seal the outer opening of the passage. On

-, admission of steam to the compartment, the

pressure within the compartment exerts a force against the lower arm of the Y-shaped inner periphery of the gasket, as aforesaid, to wedge it outwardly against the gasket-retaining flange 34 so that the seal of the passage is increased in strength with the increase in pressure to prevent the escape of steam from the passage,

When the door is in open position as shown in Fig. 8, and the steam pressure is released, all the pressure upon the gasket is removed, the bevelled periphery of the gasket withdraws slightly from the gasket-retaining flange, and the seal of the passage is broken. Any condensate collecting upon the inner face of the gasket-supporting plate will drain by force of gravity into the space between'the arm of the Y-shaped inner periphery and the peripheral offset portion 9 of the gasket-supporting plate. Thence it will flow downwardly between the loose-fitting inner periphery of'the gasket and said offset portion 9 of the gasket-supporting plate to the bottom of the leg of the Y, and thence through the passage 35 and out of the door between the outer periphery of the gasket and the gasket-retaining flange. In a similar manner any condensate pocketed in the leg of the Y when the door was closed and while the gasket was under pressure will drain through the passage and out of the door when the door is opened and the pressure on the gasket is released. From the'foregoing it is evident that without interfering in any way withthe sealing of the compartment, the door insures freedom from stagnant condensate which is the'scurce of contamination and obnoxious cooking odors.

While the embodiment of Figs. 6, '7 and 8 has been described as provided with only one passage 35, it is to be understood that the invention is not to be so limited and may comprise a plurality of similar passages provided in the lower portion of the gasket Hi.

It should be understood that the present disanemone:

closme i's' foi tii'e purpose ofiillustratiomonlysrand that the inventiom includesall modifications and equivalents whi cli -fall within the scopeaof-Ztlieaappendedclaimse' 1' claim In combination, apressure compartment marginal portions defining an opening; 3-? door' for sealing" said; opening, comprising a closure member" havinga marginal portion sin-rilar tobut larger 'tl'iarrsaid opening; gasket supporti-ng means similan to but larger" than: said opening" mounted on the inner-' surface of said closure." member face contact therewith" and having a peripheralportions offset relative thereto, a resilient frame-like gasket having-an,

inner peripheral portion formed' with a continuous= groove defining atapering wall and T fitting about: said"- supporting means"- with: the offset peripheral" portion ex-tending'into thegroovegthe faces of said gasket b'eing interp'osed between the marginal portions the closure"- member and opening; and' a gasket retainingmember abutting the outerperipli'ery of tI-ie gasket; so that" when pressure is admitted to the compartment it exerts": aeforce against the tapering wall" of the gasket to wed'gemliegasket downwardly against marginal portion of the opening and cut wardiy: against the gasliet -retainingi member to seal the'openingz In combination, a;- pressure compartment having marginal! portionsdefining an opening, a door for sealing said opening; comprising a closure member having a marginalportion similar to-but -larger said opening gasket'sup porting meanssi-milar tobut larger than said opening meunted on" the inner surface of said closure member" in f'aeecontact therewith and havingaperipheral -portiorroffset relative thereto, a resilient frame-liliegaskethaving an approximately Y-shaped inner periphery fitting about said supporting means with the ofiset peripheral portionextendingintdthe leg of the Y, the faces of said'gasket'beinginterposed between the marginal, portionseof theolosuremember-and opening, and a, gasket-retainingfmember=abutting the outer periphery of the gasket, so that when pressure isadmitted tolthecompartment it exerts a force against the lower arm of the Y-shaped inner periphery of the gasket to wedge the-gasket: downwardiy against the -marginal-- portion of the opening and outwardly against the gasketretaining member to seal the opening.

3. In combination, a pressure compartment having marginal portions defining an opening, a door for sealing said opening, comprising a closure member having a marginal portion similar to but larger than said opening, means for removably locking the closure member in juxtaposed relation to the opening, gasket supporting means similar to but larger than said opening mounted on the inner surface of said closure member in face contact therewith and having a peripheral portion offset relative thereto, a resilient frame-like gasket having an inner peripheral portion formed with a continuous groove defining a tapering wall and fitting about said supporting means with the offset peripheral portion extending into the groove, and having inwardly diverging faces interposed between the marginal portions of the closure member and opening, when the closure member is locked, and adapted to be pinched therebetween to form a seal, and a gasket-retaining member abutting the outer periphery of the gasket, so that when pressure is admitted to the compartment it exerts a force 6, agai-n'stitlie taperingrwalli'ofi'the gasket itoswed'ge the; gaskett doymwardlw againsta the; marginal porti on oi f theopening and outwardly against the gasket'aretaining member whereby the seal is: increased? imstrengtli with' the -increase in: pres-i sure within-the compartment con'rbinatic m,v a-:. pressure compartment having: marginal f portions-' defining an. opening; a doorfor; sealing said; opening; comprising a closure :member having: a: marginal portionsim-v ilar: to but larger than said opening, means-for removablyrlocking the closure member 'in juxtaposedlirelationto the opening; gasket supporting means similar 1 tmbut larg'er than saidopening monntedl on -v the inner: surfaceof" said" closure member imfaee: contact therewith and having a peripheral; portionz offsetirelative thereto,- a re* sil'ient frame like-gaskethaving an approximately Wshapedinner periphery fitting about said supporti ng' means---with the offset peripheral portion extendinginto' the legef the Y; and having in= wardly diverging faces interposed between the marginal portions of the closure member and opening, when'the closure-member is locked, and

' adapted tobe pinched therebetween to form a seal; anda gasket retaining' member abutting theioutenperipliery of'the gasket; so that'when pressure isadinitted -to th'e compartment it-exert's a force against the lower arm of the Y -shaped inner'periphery-of the gasket to wedge the gasket downwardlyagainst the marginal portion of the opening and=outwardly against the gasket' ret'aining? member whereby the seal is increased in strength with=tlie increasein pressure within the compartment? 51 In combination; apressure compartment having marginalportions defining an opening, a: doon for sealing said opening, comprising a closure memberhaving a marginal-portion similar to but larger than said opening, gasketsupporting means" similar to but larger-than said opening mounted on the: inner surface of said closuremember in face contact therewith and having a peripheral portion oifset relative thereto, a resilient frame-likegaskethaving an inner peripheral portiorrformed with: a continuous groovedefinedby' arrinner and outer-wall inclined toward eachother'and fitting about" said supporting'meanswiththeoffset peripheral-portion extending into the groove, the faces of said" gasket being interposed between the marginal portions of the closure member and opening, and a gasketretaining member carried by the door in position to abut the outer periphery of the gasket when the closure member is in closed position, the portion of the gasket which is lowermost when said door is open having at least one passage affording communication between the bottom of the groove and the outer periphery of the gasket which abuts the gasket-retaining member, the parts being so constructed and arranged that when pressure is admitted to the compartment it exerts a force against the inner inclined wall of the gasket to wedge the gasket downwardly against the marginal portions of the opening and outwardly against the gasket-retaining member to seal the opening and passage, and when the door is opened and pressure upon the gasket is released, any condensate collected between the inner inclined wall and supporting means will drain by force of gravity to the bottom of the groove, through the passage and thence out of the door between the gasket and gasket-retaining member.

6. In combination, a. pressure compartment having marginal portions defining an opening, a door for sealing said opening, comprising a closure member having a marginal portion similar to but larger than said opening, gasket supporting means similar to but larger than said opening mounted on. the inner surface of said closure member in face contact therewith and having a peripheral portion offset relative thereto, a resilient frame-like gasket having an inner peripheral portion formed with a continuous groove defined by an inner and outer wall inclined toward each other and fitting about said supporting mean with the offset peripheral portion extending into the groove, the faces of said gasket being interposed between the marginal portions of the closure member and opening, and a gasketretaining member comprising a flange integral with the marginal portions of theclosure member and inclined inwardly toward the marginal portions of the opening, the inner face of the flange abutting the outer periphery of the gasket when the closure member is in closed position, the portion of the gasket which is lowermost when said door is open having at least one passage affording communication between the bottom of the groove and the outer periphery of the gasket which abuts the flange, the parts being so constructed and arranged that when pressure is admitted to the compartment it exerts a force against the inner inclined wall of the gasket to wedge the gasket downwardly against the marginal portions of the opening and outwardly against the flange to seal the opening and passage, and when the door is opened and pressure upon the gasket is released, any condensate collected between the inner inclined wall and supporting means will drain by force of gravity to the bottom of the groove, through the passage and thence out of the door between the gasket and flange.

7. In combination, a pressure compartment having marginal portions defining an opening, a door for sealing said opening, comprising a closure member having a, marginal portion similar to but larger than said opening, gasket-supporting means similar to but larger than said opening mounted on the inner surface of said closure member in face'contact therewith, and having a peripheral portion ofiset relative thereto, a resilient frame-like gasket having an inner Number peripheral portion formed with a continuous groove defining a tapering wall and fitting about said supporting means with the offset peripheral portion extending into the groove, the faces of said gasket being interposed between the marginal portions of the closure member and opening, the outer periphery of the gasket having a beveled portion, and a gasket-retaining member abuttingsaid beveled portion so that when pressure is admitted to the compartment it exerts a force against the tapering wall of the gasket to wedge the gasket downwardly against the mar ginal portion of the opening and outwardly against the gasket-retaining member to seal the opening.

8. In combination, a pressure compartment having marginal portions defining an opening, a door for sealing said opening, comprising a closure member having a, marginal portion similar to but larger than said opening, a gasketsupporting means similar to but larger than said opening mounted on the inner surface of said closure member in face contact therewith, and having a peripheral portion offset relative thereto, a resilient frame-like gasket having an approximately Y-shaped inner periphery fitting about said supporting means with the offset peripheral portion extending into the leg of the Y, the faces of said gasket being interposed between the marginal portions of the closure memher and opening, the outer periphery of the gasket having a beveled portion, and a gasketretaining member abutting said beveled portion, so that when pressure is admitted to the compartment it exerts a force against the lower arm of the Y-shaped inner periphery of the gasket to Wedge the gasket downwardly against the marginal portion of the opening and outwardly against the gasket-retaining member to seal the opening.

RICHARD E. JEFFERY.

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

UNITED STATES PATENTS Name Date 1,872,020 Taylor Aug. 16, 1932