US2371460A

US2371460A - Swivelly mounted ladder stabilizer

Info

Publication number: US2371460A
Application number: US529152A
Authority: US
Inventors: Edward F Needham
Original assignee: Individual
Current assignee: Individual
Priority date: 1944-04-01
Filing date: 1944-04-01
Publication date: 1945-03-13
Anticipated expiration: 1962-03-13

Description

March 13, 1945. E: F. NEEDHAM SWIVELLIY MOUNTED LADDER STABILIZER Filed April l, 1944 INVENTOR. EDWARD F M51754]? ATTORNE a novel ladder foot Patented M... .13, 1945v "UNITED STATES PAT-IE I 2371,4662. It v swrvmr MOUNTED LADDER, STABILIZllB;

' EdwardF. Neea mm. Alhambra, Calif.

NT it mm f Application April 1 1944, Serial No. 529,152" V p b lemma. (craze-es) This invention relates toimprovements in swivelly mounted ladder stabilizers. Thegeneral objector-the invention is to pro- .vide anbimproved apparatus for permitting a' I ladder to be stabilize d in practically any position thereof. v 'A more specific object of the invention isto provide a novel ladder attachment for fitting'on one or both legs of a ladder so that the ladder will be stable upon uneven surfaces thus reducing to a minimum the likelihood of a worker being injured due to the ladder slipping or falling.

Another object of' the invention is to provide a novel swivelly mountedladder foot member.

A. further object of the invention is to provide a novel ,equalizer for the legs of a ladder.

A further object of the-invention is to provide I member-that maybe adjusted to any position to conform to uneven contours or sloping surfaces.

Other objects and advantages of my invention will be apparent from the following description taken in connection with the accompanying drawing, wherein:

Fig. l is an isometric view of the ladder stabilizers of my invention; v

Fig. 2 is a longitudinal sectional'view of one of the stabilizers;

Fig. 3 is a sectional view taken on line 33, Fig. 2, and

Fig. 4 is an elevational view of a ladder equipped with my stabilizers in position on a pitched roof.

Referring to the drawing by reference characters, I have shown my invention as embodied in a swivelly mounted ladder stabilizer which is indicated generally at I0.

As shown the device is adapted to be mounted upon a lower end of the rails or legs of a ladder II. One of the devices embodied in my invention may be mounted upon each leg of the ladder or a device may be used on only one leg depending upon the condition of e S p t Surface upon which the ladder rests.

The device It! as shownincludes a foot member or sleeve l2,.a coupling member l3 and a support H. The foot member includes sides l5 and ends IS. The sides I5 are provided with pairs of aligned holes 11. In use the foot member is slipped over the lower end of one of the rails of the ladder I l which end is providedwith an aperture l8, alignable with any one of the holes IT in the foot member, and through the aligned holes a fastening member 19 such as a boltis inserted and secured. The arrangement of spaced holes in the sleeve requires that only one aperture I8 be provided in the ladder to accomplish. a large be in the nature member 2| is supported in

apertures

24 and 25 in

legs

26 and 21 on

plate members

28 and 29.

The plate members overlap and may slide for adjustment to engage sleeves l2 of different sizes.

The lower plate member 29is' provided with a pair of depending legs 30 whi'ch are provided with aligned apertures 3| through which a. pivot pin such as a bolt 32 extends. The'plate'member 28 has a pair of depending legs .33 which are provided with a slot '34 which receives pivot pin 32. The slot permits adjustment of the plate members toengagethe sleeve member. Y

The pin 32 is mounted onthe support H which includes a base member 35 having-ends 3B which latter have-apertures 3'! The base member 35 is mounted on the top of a support 38 which is provided with an anti-slip member such as a rubber pad 39.

In use one of the stabilizers is mounted upon the lower end of one of the legs of the ladder and if desired another stabilizer is mounted upon the stabilizer may then be adjusted after which the

bolts

22 and 32 are tightened so that the gripping member 39 will lie flat upon its support whether this support is inclined, tilted or otherwise uneven. The bolts may be tightened sufficiently to prevent movementof the stabilizer portions but I find that by merely tightening the bolts so that friction of the partswill hold them in their set position a worker can more readily adjust his ladder in different locations. the ladder and swivel of my invention may be used on a sloping roof of a structure 8. It will be seen that the rails or legs I l of the ladder may be positioned at difierent depths in the sleeve l2 and that any desired angular position may be taken by the ladder.

From the foregoing description it will be apparent that I have invented a swivelly mounted ladder stabilizer which may be economically manufactured, is adjustable and easily mounted and does not readily get out of order.

Having thus described my invention, I claim:

1. A ladder stabilizer comprising a foot member adapted to engage the'rail of a ladder, a coupling device including a pair of overlapping plate members disposed beneath said foot member, each apertures receive of a bolt with a hea,d.22 and a nut 23. The shaft receiving the pin 32.

As shown in Fig.

.apertured ends receiving plate member having an end thereon overlapping the foot member, said ends and said foot member having aligned holes, a pivot pin passing through said holes, one of the plate members having a pair of depending legs thereon, said legs having aligned apertures, a second pivot pin passing through said apertures, the other plate member having legs provided with apertures receiving said second pivot pin and a support device including a base member, said base member having members thereon receiving said second pivot'pin.

2: A ladder stabilizer comprising afoot member adapted to engage the rail of a ladder, a coupling device including a pair of overlapping. platememe hers disposed beneath said foot member, each plate member having an end thereon overlapping th foot member, said ends andsaid foot, member having aligned holes, a pivot pin passing through said holes, one of the plate members :ham'ng: :'a

pair of depending legs thereon, said legs having aligned apertures, a second pivdtpin passing through said apertures, the other plate-member having legs provided with slots "s'lidably receiving said second pivot pin and a support device including :a base member, 'sai-d'base member having a support, said base being mounted on 'said'support, and anti-friction means on the lower surface of said support.

3 A swivelly mounted ladder stabilizer comprising a support device, said support device including a member having gripping means on the lower face thereof, aLoasefixedly mounted on the support, member, said base having :a pair of upwardly extending ends, a shatt member mounted onsaid lends a coupling device "including a pair of overlapping plates, each plate having a pair of :depending .legs thereon, the legsnn said plates being pivotally mounted on said shaft, an end member projecting upwardly from each plate, a second shaft carried by said end members, a hollow sleeve member comprising a pair of spaced sides and spaced ends, said sides having aligned apertures receiving said second shaft, said sleeve member having an open top, a plurality of spaced apertures arranged in the upper portion of the sleeve member, a ladder rail arranged in the sleeve member, said ladder rail having a hole therethrough, and securing means passing-through certain of said sleeve member apertures and said Eladder rail hole.

said "second pivot pin,

4. .Asvvivelly mounted ladder stabilizer comprising a support device, said support device includingamember having gripping means on the lower face thereof, a base fixedly mounted on the support member, said base having a pair of upwardly'aextending ends, a shaft member mounted on said ends, a coupling device including a pair of overlappingplates, each plate'having-a pair of depending legs thereon, the "legs-ion one plate being pivotally mounted on said Strait, the'legs on the other plate each having a slot 'slidably receiving said shaft, an end member'proiecting-npwardly from each plate, a second shaft carried'by said end members, a hollow sleeve member-comprising a pair of spaced sides and spaced ends,

said sides having aligned apertures receiving said second shaft, said sleeve member' hav-ing ac'losed bottom and an open top, a plurality of spaced apertures arranged in the 'u-pepr portion 'of the sleeve member, a ladder "railarranged in the sleeve member, said ladder ra'il having a hole therethrough, and securing means passing through certain of said sleeve *member apertures and said ladder railfhole.

EDWARD Fl