US3920101A

US3920101A - Safety toe guard

Info

Publication number: US3920101A
Application number: US208105A
Authority: US
Inventors: Lawrence I Richards
Original assignee: Autoquip Corp
Current assignee: Autoquip Corp
Priority date: 1971-12-15
Filing date: 1971-12-15
Publication date: 1975-11-18
Anticipated expiration: 1992-11-18
Also published as: CA970705A

Abstract

A platform is vertically movable with respect to the floor from a position within a recess in the floor to above the floor. About the periphery of the platform, a band of rubber extends horizontally out from the edge of the platform a substantial distance over the floor area. This band is sufficiently flexible so that when encountering an obstacle during its descent it will deform upwardly to prevent placing undue pressure on that obstacle.

Description

United States Patent 1191 Richards [4 Nov. 18, 1975 1 1 SAFETY TOE GUARD [75] Inventor: Lawrence I. Richards, Elk Grove Village, 111. [73] Assignee: Autoquip Corporation, Chicago, Ill. [22] Filed: Dec. 15, 1971 21 Appl. No: 208,105

[52] US. Cl. 187/98; 187/1 R [51] Int. Cl. B66B 5/00 [58] Field of Search 187/98, 40, 1R

[56] References Cited UNITED STATES PATENTS 600,759 3/1898 Williams et al. 187/1 R 687,537 11/1901 Metzger 187/98 748,702 1/1904 Conary 187/98 1,891,300 12/1932 Baker 187/98 FOREIGN PATENTS OR APPLICATIONS 154.681 10/1903 Germany 187/1 R Germany 187/1 R Canada 187/1 R Primary E.\'aminerEvon C. Blunk Assistant Emminer-Johnny D. Cherry Attorney, Agent, or Firm-Darbo, Robertson & Vandenburgh [57] ABSTRACT A platform is vertically movable with respect to the floor from a position within a recess in the floor to above the floor. About the periphery of the platform, a band of rubber extends horizontally out from the edge of the platform a substantial distance over the floor area. This band is sufficiently flexible so that when encountering an obstacle during its descent it will deform upwardly to prevent placing undue pressure on that obstacle.

5 Claims, 4 Drawing Figures US. Patent Nov. 18,1975 Sheet 1 of2 3,920,101 M I LAWRENCE l. RICHARDS b. 4 7' ESVENTOR US. Patent Nov. 18, 1975 SheetZofZ 3,920,101

SAFETY TOE GUARD- BACKGROUND ANDSUMMARY OF THE INVENTION forms to warn a person standing adjacent the descending platform to ensure that the person inadvertently does not get a toe trapped between the bottom of the platform and, the edge of the floor area.

When workmen are operating about a descent platform which moves into a recess in the floor,'there is always a danger of their inadvertently getting a toe trapped under the platform and above the floor'ara upon which they are standing. This can result in a serious injury. Various protective devices have been em-. ployed to guard against this happening. For example, in many instances the platform will have a downwardly extending skirt immediately adjacent the floor area. This shirt is of such a vertical dimension that it will always close off the space below the platform when the platform is raised. Another proposal has been to use an angularly positioned skirt which will act as a cam to push a persons foot out of the danger area. The principal problem with such devices is that they add substantially to the cost of the installation. The principal object of the present invention is to provide-a protective device which is effective against this danger, but which will be substantially less expensive than the present commercial practice.

Further objects and advantages will become apparent fromthe following description.

DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of an embodiment of the invention;

FIG. 2 isa partial section as seen at line 22 of FIG. 1;

FIG. 3 .is a view similar to FIG. 2 but showing one stage of operation of theembodiment; and

FIG. 4 is a view similar to FIG. 2 but showing another stage of the protective operation.v

DESCRIPTION OF SPECIFIC EMBODIMENTS The following disclosure is offered for public dissemination in return for the grant of a patent. Although it is detailed to ensure adequacy and aid understanding, this is not intended to prejudice that purpose of a patent which is to cover each new inventive concept therein no matter how others may later disguise it by variations inform or additions or further improvements.

--There are many installations where there is a platform' which is received in a recess 11 in a floor 12.

:scending platform and the top of the floor area 12.

The protective device of the present invention essen tially comprises a flexible band 15 which is secured to and extends outwardly from the periphery of the platform. Thus there is an angle 16 secured to the periphery of the platform as by means of bolts 17. The upper 2 leg of the angle is coplanar with the top of platform 10 and spans only part of the gap 18 between the outside 19 of platform 10 and the wall 20 which defines recess 1 1. The band 15 is secured to this upper leg of the angle as by means of rivets 21.

A recess24 is formed in the floor 12 immediately about the periphery of wall 20. Thus there is an angle 25 set in the concrete of the floor and forming a step down to recess 24. Also, there is an angle 26 at the top of wall 20. The vertical depth of recess 24 is approximately equal to the thickness of band 15 plus the thickness'of the top leg of angle 16. The base of this recess, which is identified by the number 12', is in effect a part of the floor area. j

The band 15 has the following requisites. It must be sufficiently rigid to project substantially straight out from the platform so long as no deforming force is applied thereto. It must be sufficiently flexible so that when it encounters an obstacle during the descent of the platform 10, that it will bend and not apply sufficient pressure to that obstacle to cause harm. While one of a variety of elastomeric materials might be employed for this purpose, the use of rubber is recommended. By the term rubber I include both the natural and synthetic materials. A neoprene of approximately 60 durometer has proven eminently satisfactory. It must extend sufficiently far over the floor area about the periphery of the platform so as to serve as a warning, as hereinafter described. A width of approximately 6 inches is adequate for this purpose. It must be sufficiently thick so as to carry any loads imposed on it when the platform is down. I recommend the use of inch thick neoprene for this purpose. Actually, as will be seen from FIG. 2, there is only a very slight gap that is structurally bridged by the band 15; that is, that amount of gap 18 which is not bridged by the top leg of angle 16.

Assume that a platform 10 has been raised from the position illustrated in FIG. 2 to that illustrated in FIG. 3 and now commences to descend. The bottom edge 13 of the platform will move downwardly along the dotted line 28. Inadvertently a workman is standing sufficiently close so that the toe 29 of his shoe 30 projects beyond line 28 and thus under the descending edge 13 of the platform. Should he not move his foot in time, the toe of the shoe will be trapped between the bottom of the platform and the top of floor area 12' and his foot is likely to be injured. However, with the protective device of the present invention, the band extends sufficiently far out so that it will brush against that per-,

son's body when he is this close to the descending platform. Thus, as illustrated in FIG. 3', the outer edge of the band 15 is brushing against the leg 31 of the individual; This pressure against the individuals leg warns him that he is in a danger area and must move back. The

band itself will not apply sufficient pressure against the and the descending band 15. However, because of the flexibility of the band, it merely bends upwardly and does not injure the persons foot even though the platform 10 descends fully to the level of the floor (the FIG. 2 position).

I claim:

3 l. A protective device for use with a platofrm or the like which is raised vertically, and subsequently lowered, with respect to a stationary area adjacent said platform and on which a person may be standing, said protective device comprising:

a flexible band affixed to the side of said platform which is adjacent said area and projecting a significant distance over said area, said band being sufficiently rigid to normally maintain a position outwardly from said platform and sufficiently flexible to readily bend from said outwardly extending position upon encountering an obstacle, said band being positioned on said platform so that, if, when said platform is raised, a person is standing sufficiently close to the edge of the platform such that his foot would be trapped under the platform when it descends, the distal edge of the band will brush his leg and thereby warn him to move his foot, while if he is standing only so close that his foot is 4 positioned under the band, but not the platform, the band will bend upwardly upon encountering the foot thereby not causing any injury to the foot.

2. A protective device as set forth in claim 1, wherein said band is formed of rubber, and the major portion of the width of the band is above said area.

3. A protective device as set forth in claim 2, wherein the rigidity of said band is in the range of approximately 60 durometer.

4. A protective device as set forth in claim 3 wherein there is a line of demarcation between said side of the platform and said area, and said band is continuous along the line of demaraction between said platform and said area.

5. A protective device as set forth in claim 3 wherein said band has a width of at least approximately 6 inches.

Claims

1. A protective device for use with a platofrm or the like which is raised vertically, and subsequently lowered, with respect to a stationary area adjacent said platform and on which a person may be standing, said protective device comprising: a flexible baNd affixed to the side of said platform which is adjacent said area and projecting a significant distance over said area, said band being sufficiently rigid to normally maintain a position outwardly from said platform and sufficiently flexible to readily bend from said outwardly extending position upon encountering an obstacle, said band being positioned on said platform so that, if, when said platform is raised, a person is standing sufficiently close to the edge of the platform such that his foot would be trapped under the platform when it descends, the distal edge of the band will brush his leg and thereby warn him to move his foot, while if he is standing only so close that his foot is positioned under the band, but not the platform, the band will bend upwardly upon encountering the foot thereby not causing any injury to the foot.