Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS2745362 A
Publication typeGrant
Publication dateMay 15, 1956
Filing dateMay 19, 1952
Priority dateMay 19, 1952
Publication numberUS 2745362 A, US 2745362A, US-A-2745362, US2745362 A, US2745362A
InventorsLunde Einar O
Original AssigneeMagor Car Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Car roof hatch
US 2745362 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

May 15, 1956 E. o. LUNDE 2,745,362

CAR ROOF HATCH Filed May 19, 1952 2 Sheets-Sheet l I I 12 I] 10 //7l@/7/0J.

2 Sheets-Sheet 2 E. o. LUNDE CAR ROOF HATCH May 15, 1956 Filed May 19, 1952 United States Patent CAR ROOF HATCH Einar 0. Lunde, Wyckotf, N. J., assignor to Magor Car Corporation, New York, N. Y., a corporation of Delaware Application May 19, 1952, Serial No. 288,719

4 Claims. (Cl. 105-377) This invention relates to a car roof hatch.

The invention is more particularly concerned with improved manually operable mechanism for releasably retaining a hatch cover in closed position upon a cylindrical housing suitably secured in encircling relation to an opening therein.

The present invention relates to a car roof hatch of the general construction of that disclosed in my Patent No. 2,647,473 of August 4, 1953.

A primary object of the invention is to provide in operative association with a cylindrical hatch frame and a disk cover therefor, a lever operable yieldable means for urging the cover into tight closed position on the frame.

A further object of the invention is to provide auxiliary adjusting means in operative association with the yieldable means whereby the pressure exerted thereby on the cover may be varied.

Other objects and advantages of the invention will become apparent in the course of the following detailed description, taken in connection with the accompanying drawings, wherein Fig. 1 is a top plan view of a car roof hatch showing the adaptation of the present invention thereto in accordance with one structure embodiment thereof.

Fig. 2 is a view partially in elevation and partially in diametrical section, as observed in the planes of broken line 2-2 on Fig. 1.

Fig. 3 is a view partially in elevation and partially in diametrical section, as observed in the planes of broken line 3-3 on Fig. 1.

Fig. 4 is an elevational view of the hatch in general correspondence to Fig. 2 but depicting a modified embodiment of the invention.

Fig. 5 is a fragmental elevational view as observed in the direction of the arrow 5 to the right of Fig. 4.

Referring now in detail to the drawings, designates a car roof hatch and which includes a cylindrical frame 11 having a base flange 12 for receiving suitable means for attachment of the frame to a car roof in encircling relation to an opening therein.

The upper end of the frame 11 is closable by a cover 13 which is provided with a pair of spaced apertured lugs 14 between which are received a. pair of spaced ears 15 projecting upwardly from the frame 11 and which are apertured in axial alignment with the apertures in the lugs for reception of a pivot bolt 16.

The cover 13 is preferably provided with a downwardly opening circumferential channel 17 in which is received a suitable gasket 18 for tight bearing engagement with the upper free edge of frame 11 when the cover is in the closed position as shown.

The frame 11 is provided with a second pair of spaced apertured ears 19 which are on opposite sides of a diameter at right angles to a diameter intermediate the ears 15.

An elongated resilient cover hold-down strap 20 is provided at one end thereof with a sleeve 21 through Ice which as well as 'the apertures in cars 19 extends a pivot bolt 22.

The strap 20 extends diametrically across the top of cover 13 and at an intermediate point thereof bears on a boss 23 extending upwardly from the center of the cover 13 and the other end of the strap projects beyond the perimeter of the cover.

The strap 20 intermediate its ends is provided with an upwardly projectingflange 24 which is apertured as at 25 and the strap at its free end is bifurcated as at 26.

In the closing of the cover 13, the resilient strap 20 bears on the boss 23 intermediate its ends and the free end of the strap is forced downwardly.

For this purpose, a lever 27 is provided and which at one end thereof is bifurcated at 28 in conformity with the bifurcation 26 in the strap 20 and .the lever on each side of the bifurcation 28 includes a cam head 29 having a strap engaging cam portion 30. A vertically disposed link 31 extends through the strap and lever bifurcations 26 and 28 respectively. The link at its lower end is pivotally connected by a bolt 32 extending through an aperture therein as well as through aligned apertures in a pair of ears 33 projecting from the frame 11.

The upper end of the link 31 is pivotally connected to the cam heads 29 by means of a bolt 34 traversing apertures therein. The lever 27 is provided with an opening 35 which receives the flange 24 and the lever is further provided with an upward extension 36 provided with an aperture 37.

In operation of the structure described and assuming the cover to be swung back into open position and with the strap 20 swung to the right in Fig. 2 and the lever 27 together with link 31 swung to the left, the cover 13 is swung to closed position, the strap 2'0 is then'swung down with its intermediate portion resting on boss 23, the lever 27 is then swung upwardly and inwardly and then forced downwardly whereupon the cam portions 30 forcibly move the free end portion of the strap 20 downwardly with a resistant deformation of the strap as shown in Fig. 2.

At this point it is to be particularly noted that the points of engagement of cam portions 39 with the strap 20 are to the left of a line L joining the link pivots 32, 34 and which results in a yieldable retention of the lever in its cover closing position.

When the cover is closed as in Fig. 2 a key 40 may be extended through aperture 25 in flange 24 and a wire connecting means 41 may be extended through an aperture in the key and a like connecting member 42 may be extended through aperture 37 in the projection 36, after which a seal S of well known form may be operatively engaged with the connecting members.

A modified embodiment of the invention is illustrated in Figs. 4 and 5 and includes means whereby the tension in the hold-down strap 21) may be readily varied.

Such means preferably comprises an angular bolt 43 having a sleeve 44 at its lower end which in turn surrounds a bushing 45 which in turn receives a pivot bolt 46 extending through apertured ears 4'7 projecting from the frame 11.

The upper angular portion of the bolt is threaded as at 48 and which extends through an elongated aperture Patent is:

1. In a car roof hatch constnuction, a cylindrical frame, a cover having a pivotal connection with the frame, means for releasably' holding the cover in closed position comprising-an elongated resilient strap extend? ing diametrically over thecover, the strap having one end thereof pivotally connected to the'frame, an upward extension on the cover engageable by an intermediate portion of the strap, a link having one end thereof pivotally connected to the frame diametrically of the pivotal connection of the strap, and a lever having one end thereof-pivotally connected to the other end-of said link, said lever having cam means engageable with the strap adjacent its free endand the lever extending above and longitudinally of the strap in operative position and having a free operating end intermediate said strap pivotal connectionand said upward extension. I

2. The structure according to claim l,'wherein said strap'is bifurcated at its free'end, said lever including a head centrally bifurcated, said link-projecting vertically through said bifurcations andhaving-its opposite ends pivotally connected to said frame and said head, said head having. cam portions engageable with said strap outwardly of a line connecting the'pivotal connections of said link.

3. The structure according to claim 1 wherein said lever is provided with an opening adjacent its free end, a flange projecting upwardly. from said strap receivable in said opening, and locking means releasablyengageable with said flange and said lever. V

4. The structure according to claim 1 wherein the pivotal connection between said frame and said strap comprises a bolt memberhaving one end thereof pivotally connected to the frame andthe threaded end of the bolt memberhavingan axially adjustable connection with the strap for varying the operating tension in the strap.

References Cited in the file of this patent UNITED STATES PATENTS

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2324356 *Jul 11, 1941Jul 13, 1943Brown Steel Tank CompanyCover structure
US2408733 *Aug 4, 1944Oct 8, 1946Entpr Railway Equipment CoRoof hatch for railway cars
US2529329 *Jul 31, 1948Nov 7, 1950De Frees Joseph HSafety tank closure
US2572963 *Jan 31, 1946Oct 30, 1951Wily James HClosure
US2647473 *Jun 20, 1951Aug 4, 1953Magor Car CorpCar roof hatch cover operating mechanism
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2985317 *Jun 24, 1957May 23, 1961Schield Bantam CompanyBallast receptacles for cranes
US3307498 *Apr 18, 1966Mar 7, 1967Acf Ind IncHatch cover securing means for railway cars
US4000703 *Jun 11, 1975Jan 4, 1977Pullman IncorporatedTrough hatch locking device
US4179999 *Mar 23, 1978Dec 25, 1979E. I. Du Pont De Nemours And CompanyHatch cover closure system
US4248160 *Mar 12, 1979Feb 3, 1981Acf Industries, IncorporatedRailway hatch cover and strap latching assembly
US4699292 *Aug 20, 1986Oct 13, 1987Westvaco CorporationPulp bleaching tower pressure relief hatch
US4889056 *Mar 27, 1985Dec 26, 1989Trinity Industries, Inc.Cover and latching mechanism for rail car loading hatch
US5273178 *Apr 20, 1993Dec 28, 1993Eimco Mining Machinery (Pty) LimitedClosable container
US5622117 *Jun 6, 1995Apr 22, 1997Salco Products, Inc.Hatch cover having a removable gasket
US5857721 *Feb 18, 1997Jan 12, 1999Liroff; JeffCargo seal
US6050199 *Mar 27, 1998Apr 18, 2000Zeftek, Inc.Hatch cover sealing device
US6113163 *Nov 9, 1998Sep 5, 2000Liroff; JeffCargo seal
US6331022 *Aug 28, 2000Dec 18, 2001Jeff LiroffCargo seal
US20060290147 *Jun 20, 2006Dec 28, 2006Liroff Jeffrey HSeal assembly for cargo container
US20140345493 *May 24, 2013Nov 27, 2014Amsted Rail Company, Inc.Railway car hatch cover
U.S. Classification105/377.7, 220/323, 49/386
International ClassificationF16J13/00, F16J13/20
Cooperative ClassificationF16J13/20
European ClassificationF16J13/20