US1683365A

US1683365A - Street-manhole cover

Info

Publication number: US1683365A
Application number: US221935A
Authority: US
Inventors: Loudenslager Henry; Walter J Loudenslager
Original assignee: Individual
Current assignee: Individual
Priority date: 1927-09-26
Filing date: 1927-09-26
Publication date: 1928-09-04
Anticipated expiration: 1945-09-04

Description

Sept. 4, 1928. 1,683,365 H. LOUDENSLAGER ET AL l STREET MANHOLE COVER Filed Sept. 26, 1927 abb/umg Patented Sept. 4, 1928.

U it

TD STATS orifice.

HENRY LOUDENSLAGER AND VALTER J'. LODENSLAGER, OF COLUMBUS, OHIO.

STREET-MANHOL COVER.

Application filed September 26, 1927.

i freely with respect to the base sections and in `many instances become completely disconnected from such base sections so as to leave such closures in an open and therefore dangerous condition. y

It is therefore an object of the present invention to provide ar manhole closure wherein the cover section thereof may be securely fastened to the complemental base sections to preclude undue relative lmovement between said ysections and particularly to prevent any looseness on the part of the cover section Vwhen the latter occupies itsk applied or operative 'position upon the base section. l

Another object of the invention resides in the provision of a manhole closure formed to include a base section provided with ar plurality of spaced arcuate ianges arranged internally thereofand disposed adjacent to plurality of integrally formed lugs provided upon the upper surface of the coverY section and arranged to engage withy the corresponding surfaces of said ianges, the arrangement being such that when'the cover'is initially applied to the base sections the lugs pass between the spaced flangesof the base sections but by partially rotating the cover section the lugs will be moved into engagement with the under surfaces of said flanges to securely position the cover section and especially to hold the same against rocking or tilting movement relative to the base section.'

A further object of the invention 'resides in providing the cover section with a vertically slidablevsubstantially U shaped handle, whereby when the cover section occupies its applied position upon the base section, the spaced legs of said handle will be positioned on opposite sides of a fixed tongue arranged internally of thefbase section, the said handle and tongue serving to lock the cover Serial No'. 221,935.

section against yaxial rotation and to re tain the saine-in such locked position until the handle is lifted so that the legs thereof clear 'the fixed tongue, which permits of partial rotation of theA cover section so that the legs thereof may be registered with the spaces provided between the sup-y vporting flanges, thereby allowing'the cover section to be lifted from theV base section, but this can be brought about only by means of a manual predetermined operation which cannot be accidentally effected. l

Still further objects reside in 4amanhole i closure of simple, strong and practical construction and vone which is economical to manufacture and utilize. v Y

Vith' these and otherobjects in view, as`

will appear as the `description proceeds, the invention consists in the novel features of; construction, combinations of elements and arrangements of parts hereinafter to-bc fully described and pointed out in the appendedV claims.

In the accompanying drawing:

Figure l is a vertical longitudinal sectiony al`view taken through the manhole closure al view showing the lock connection between the cover andl thel base section-.H y

Referring more particularly to the drawing the numeral l designates the improved manhole closure comprising the presentinvention inits entirety. v Essentially, the closure comprises a base sectionY 2 and `a sepa?v rable cover section 3, both of which may be I formed from cast iron or other suitable material. The base section is of cylindrical formation and has a supporting ring Llintegrally cast upon the `lower part thereof, as

is customary in devices of this kind, the said ring' being positioned upon suitable 4*supporting masonry 5 and the body portion of. the sectionQ may be ksurrounded by concrete, `or other materialA used in street or other.

the top thereof are seating flanges 7. In the present instance three of such flanges have been shown although any suitable number may be utilized. The flanges are prefer ably spacedrrelative to each other so as 'to provide openings or spaces 8 therebetween, the purpose of which will be hereinafter developed. Each of the flanges 7 includes a flat horizontal upper surface 9, a substan tially perpendicular vertically arranged surface 10 and a downwardly and outwardly obliquely arranged surface 11, which latter at its lower edge merges with the inner wall of the base section. Y

The coversection comprises essentially a flat metallic plate of suitable thickness, Vthe upper' surface 12 of which being suitably coro r'ug'ated or ro'ughened to prevent slipping thereof on the partofV objects passing over the closure. The sideV `of the cover section is reinforced by the provision of inner and outer'circular and concentrically disposed ribs 13 andalll respectively, which are united by means of cross ribs 15. The outer rib 14 is 'of such rdi'ameter'that the same engages closely with the perpendicular surface 10 of the fl'anges'7, andthe under surface vof the 'closure kbetween the -rib let and the vextreme outer edge of the closure engages with the horizontal surfaces 9 of the flanges 7. lIn addition, the outer vertical walls of the 'cover section are arranged to closely engage with the inner wall of the body section disposed above the Aflanges 7, so that the" upper surface of the closure section will terminate substantially evenly with the Vupper Asurface portions of the base section 2, as shown in Figure l. a One of the Ioutstanding features of the present invention resides in forming the under surface of the cover section tol include a plurality of equally spaced downwardly projecting lugs or legs 16, Which are cast with the cover section at the timey of its formation `These lugs are each formed Ito include an outwardl' inclined surface 17, which corresponds coselyto the `angle of the inclined surface 11of the flanges In operation, the lugs or legs 16 are positioned' so that the same register with the spaces 8 provided between the flanges 7. This allows downwardly upon e flanges 7 and `at 8 and lare dis osed in immediate engagement with the '1nclined walls 11 of the seatingi'anges '7. VBy this arrangement it will beseen that ifthe closure section 3vis lsubz jected :to localized forces or strains which would tend to tilt or-oscillate the cover section relative 'to 'the base section, such tilting or rocking movement is prevented by reason of the locking relationship existingbetween the lugs vor legs 16 and the flanges 7, thus overcoming one of the outstanding objections which have been found Vto eXis-t in vstand-ard manhole closures. Y

Furthermore, to prevent accidental disengagement between the flanges 7 and the lugs 16, the closure section 3 is provided with a substantially U shaped handle 18, the spaced legs 19 of which being slida-bly mounted withinvopeni Us provided adjacent to the perimeter of nl horizontally projecting tongue 20, which'is arranged in registration with one of the spaces 8 provided between the Iflanges 7. Through the provision of the handle 18 and the tongue QOit will be observed that when the handle is .elevated it may be employed to facilitate the lifting and positioning of the cover section, allowing an Aoperator to posi? tion Athe lugs or legs 16 between the spaces 8 and then to rotate the ,cover section to as sume a locking position. After the cover section Ahas been rotated to a predetermined extent, which is governed by the registration of matched indications 21, the handle 18 is dropped so that the legsthereof will be positioned on opgposite sides of the stationary tongue 20. y this arrangement it will be observed that the cover section is locked against movement which might tend to dis.- engage the legs lrfrom engagement with the flanges 7. rlhe arrangement, therefore, provides against accidental unlocking of the cover section and requires predetermined manipulation thereof to remove the sameV from its operative relation with the base secion. One edge of the cover'section .may be provided with a

notch

2,2 in which a crowbar or the like (not shown) may be inserted' for facilitatingthe lifting lor other positioningl of the cover section. vThetopl of thek handle 18 is adapted to be received within a 'groove 23 formed in the cover section 'so that the handle willV lie flush, when not in use, .with the top of thefcoverse'ction. Q

In view of the foregoing itis believed that the features and advantages of the invention will be readily understood byv those skilled in the art, and therefore a more .extended explanation hasbeen omit-ted. l

What is claimed is:

l1. A manhole closure comprising, a base section vand a separable cover section, said base -section being formed to include a ra'lity of 'internally situated, vrelatively spaced seating llanges, a plurality of spaced lugs integrally formed with the under side of said cover section and arranged for registration with the spaces provided. between said flanges, whereby upon partial rotation of said vclosure section said lugs may 'be moved into locking engagement lwith the Y tie cover section 3, liormed internally .of the base section is a lili under surfaces of said flanges, and a handle member carried by said cover section and arranged for engagement with a stationary tongue formed with said base section to lock said cover section against rotary movement of an accidental character.

2. A manhole closure comprising a base section formed to include a substantially cylindrical body, spaced flanges projecting internally from said body and formed to in- 1 clined bottom walls of said flanges, whereby upon rotation of' said cover section relative to said body section said legs will be positioned beneath said flanges to preclude vertical movement on the part of said cover section, the outer edge portions of said cover section being seated upon the horizontal upper surfaces of said flanges, and means for locking said cover section against accidental rotation when said cover section is finally positioned upon the base section.

3. A manhole closure comprising a substantially cylindrical base section, spaced flanges positioned internally of said base section and arranged adjacent to the top thereof, said flanges being formed to include substantially horizontal upper walls, and inclined lower walls, a cover section having a perforate portion thereof seated upon the horizontal upper walls of said flanges, and a plurality ofl integral lugs depending from the underside of said cover section and coop erative with the inclined lower walls of said flanges to secure the cover section to the base section upon relative rotation between said sections. l

l. A manhole closure comprising a base section and a 'separable cover section, said.

base section being of substantially cylindrical formation and provided internally contiguous to the upper end thereof `with a plurality of spaced arcuate flanges, adapted to constitute a seat for the cover section7 a plurality of lugs integrally forming with and depending from the underside of said cover section and situated to register initially vwith the spaces provided between said flanges, whereby upon relative rotation between said sections said lugs may be moved under said flanges to secure the cover section to the base section and a removable handle membercarried by said cover section arranged for cooperation with a stationary abutment formed with said base section for the purpose of' locking the cover section against rotation relative to saidbase section when said section is occupying a predetermined position of closure.

l In testimony whereof we afliX our signa-