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Publication numberUS3174788 A
Publication typeGrant
Publication dateMar 23, 1965
Filing dateFeb 12, 1963
Priority dateFeb 12, 1963
Publication numberUS 3174788 A, US 3174788A, US-A-3174788, US3174788 A, US3174788A
InventorsMark H Williams
Original AssigneeMark H Williams
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Door knob cover
US 3174788 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)

March 23, 1965 M. H. WILLIAMS 3,174,788


3,174,788 DGGR KNOB COVER Mark H. Williams, 1323 W. Francis, Spokane, Wash. Filed Feb. 12, 1963, Ser. No. 258,077 1 Claim. (Cl. 292-347) This invention relates to closures and, more particularly, to a safety device for door knobs.

it is an object of the present invention to provide an accessory for use on door knobs which will prevent young children from opening doors or turning faucets, so as to prevent the opening of such doors or faucets which could lead to injury or harm.

A further object of the present invention is to provide a door knob cover of the type described which can be readily applied and removed from the door knob or faucet handle, and which when so applied may be squeezed by an older person to effect turning of the knob or faucet, but which will effectively prevent actuation by younger children.

A more general object of the invention is to provide an improved door knob cover which will produce new and unusual results in this particular art.

These and still other objects of the present invention will become apparent from a reading and study of the following specification and claim, taken together with the accompanying drawings in which like parts are referred to and indicated by like reference characters appearing throughout the specification and drawings, and wherein:

FIGURE 1 is a side view of a door knob cover made in accordance with the present invention;

FIGURE 2 is a plan view of the opposite side of the door knob cover shown in FIGURE 1; and

FIGURE 3 is a front plan view of the assembly shown in FIGURES 1 and 2, in actual use.

Referring now to the drawing, a door knob cover made in accordance with the present invention is shown to include a pair of substantially semi-spheroidal elements 12, 14 defining an enlarged interior housing for receiving a door knob or faucet handle therewithin. These elements 12, 14 are hingedly connected together along one side, by means of a flexible hinge member 16 which yieldably urges the elements toward a closed position around the handle.

The opposite side of the elements 12, 14, defines a parting line 18, which is separable to allow insertion of the knob into the interior enclosure of the cover. The base of the closure element 12, 14 is provided with a thickened section 20 to provide a degree of rigidity for holding the shape of the cover around the knob handle. The elements 12, 14 are preferably constructed from a compressible sponge-type material, such as foam rubber or plastic, which can be manually squeezed to transmit a squeezing pressure from the hand to the knob or handle by a person having sufficient strength. Of course, a younger child will not be able to exert sufficient squeezing pressure to cause frictional engagement of the cover with the knob or handle.

With the elements 12, 14 in the handle enclosing position, the one element 14 has a flap 22 extending across the face and part of the sides thereof which masks the seam line 18 of the assembly.

A latch assembly, enclosed within a protective cover 28, has a pair of outwardly extending stems 26 for releasing the latch mechanism to facilitate the opening of nited States Pater the two pieces 12, 14, from enclosing engagement with the knob, and from around the shaft of the handle or knob which is received within the central opening 24 of the cover.

The stems 26 may also be used to spread the hinged elements 12, 14-, apart to facilitate the application or removal thereof with respect to the door knob or handle.

It will now be recognized that when supplied to the knob or handle, the assembly It will be loose fitting thereupon so as to be free-turning when rotated by a small child. However, an older child or adult may exert a squeezing pressure upon the cover assembly 10 to provide frictional engagement with the door knob or handle to facilitate the actuation of the door latch in a conventional manner. This device will therefore prevent small children from opening doors and valves, or the like, whenever the cover is supplied.

It will now be clear that an improvement in this art has been provided which accomplishes the objectives heretofore set forth. While the invention has been disclosed in its preferred form, it is to be understood that the specific embodiment thereof as disclosed and illustrated herein is not to be considered in a limited sense as there may be other forms or modifications which should also be construed to come within the scope of the appended claim.

Having described the invention, what is claimed as new and desired to be secured by Letters Patent is:

A safety door knob cover comprising in combination a pair of hollow, substantially semicylindrical elements, each of said elements being semi-spheriodal at one end and each having a generally flat opposite end wall of semicircular configuration for loosely enveloping a knob of a door, hinge means hingeably connecting one cylindrical side of each of said elements together and a latch means on the opposite cylindrical side for releasably securing the said opposite side of said elements together, each of said flat, semicircular end walls defining a thickened panel to give a degree of rigidity for holding the shape of the cover around a door knob handle, a semicircular opening in each said semicircular end wall defining together a circular opening for receiving a shaft of a door knob therethrough, said hollow, semicylindrical elements comprising compressible pads defining an enlarged interior housing freely receiving a door knob therewithin, said hinge means comprising a flexible strip carried by said one side of said elements yieldably urging said elements towards a closed position about a door knob, said latch means comprising a radially outwardly extending arcuate housing on each said element, said housing of each said element together containing a latch mechanism for releasably securing said opposite sides of said elements, and each said element having a radially outwardly extending stem for releasing said mechanism.

References Cited by the Examiner UNITED STATES PATENTS 1,329,913 2/20 McGuire -212 2,587,285 2/52 Broscoe 292-347 2,845,104 7/58 Frankel.

M. HENSON WOOD, 111., Primary Examiner.

ALBERT H. KAMPE, Examiner.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1329913 *Jun 7, 1919Feb 3, 1920Mcguire PatrickSteering-wheel lock for automobiles
US2587285 *Dec 2, 1949Feb 26, 1952Edward W BroscoeDoorknob attachment
US2845104 *Oct 5, 1956Jul 29, 1958Frankel MorrisPlastic containers with hinged relatively movable parts
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3340914 *May 10, 1965Sep 12, 1967James B RicksRatchet grip
US4869305 *Dec 14, 1988Sep 26, 1989Jones Mark TDoorknob anti-rotation device
US4913479 *Jan 31, 1989Apr 3, 1990Allison Lawrence P M ADoor knob handle attachment
US5008551 *May 16, 1989Apr 16, 1991Randolph Timothy TPhosphorescent luminous door knobs cover
US5615567 *Aug 30, 1995Apr 1, 1997Kemp; Alan D.Exterior door lock cover
US7065922 *Jul 28, 2000Jun 27, 2006Nubis B.V.Locking mechanism for a gate
US7077909 *Oct 26, 2004Jul 18, 2006Crane Richie LDoorknob paint shield
U.S. Classification292/347, 16/DIG.300, 16/430, 292/DIG.200, 16/82, 16/414
International ClassificationE05B13/00, E05B65/24
Cooperative ClassificationY10S16/30, E05B13/001, Y10S292/02
European ClassificationE05B13/00B