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Publication numberUS3822905 A
Publication typeGrant
Publication dateJul 9, 1974
Filing dateOct 16, 1972
Priority dateOct 16, 1972
Publication numberUS 3822905 A, US 3822905A, US-A-3822905, US3822905 A, US3822905A
InventorsV Bell
Original AssigneeKing Seeley Thermos Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Plastic latch
US 3822905 A
A lunch kit or the like embodying an improved and simplified molded plastic latch for retaining the cover in a closed position. The plastic latch is formed from a single element having a base portion and a latch portion that is integrally connected to the base portion by a shank portion. A handle portion is also carried by the shank portion contiguous to the latch portion for deflecting the shank portion as a cantilever beam to move the latch portion to a released position.
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Description  (OCR text may contain errors)

United States Patent [191 Bell [451 1 July 9, 1974 PLASTIC LATCH [75] Inventor: Vernon D. Bell, Westerley, R.l. [73] Assignee: King-Seeley Thermos C0., Norwich,


[22] Filed: Oct. 16, 1972 [21] Appl. No.: 297,626

[52] US. Cl. 292/87, 292/D1G. 38 [51] Int. Cl. E05c 19/06 [58] Field of Search 292/87, 114, DIG. 38

[56] References Cited UNlTED STATES PATENTS 1,242,391 10/1917 Ulrich 292/87 1,316,818 9/1919 Sweet l 217/56 2,315,415 3/1943 Gilbert 292/87 X 2,873,880 2/1959 ,Poulos 292/87 X 8/1962 Miller 292/114 3,144,166 3/1964 Cross 220/60 3,630,558 12/1971 Andreini. 292/87 3,711,140 1/1973 Onori 292/87 Primary Examiner-Robrt L. Wolfe Attorney, Agent, or Firm-Harness, Dickey & Pierce ,3 ABSTRACT 2 Claims, 3 Drawing Figures PLASTIC LATCH BACKGROUND OF THE INVENTION cates the structure and adds considerably to its expense.

It is, therefore, a principle object of this invention to provide an improved and simplified latch mechanism.

It is another object of this invention to provide a simplified latch mechanism embodying a resilient element that is biased by its own resilience to one of its positions.

It is another object of this invention to provide an improved and simplified plastic latch.

BRIEF DESCRIPTION OF THE DRAWING FIG. 1 is a perspective view showing a lunch kit embodying this invention.

FIG. 2 is an enlarged cross sectional view taken along the line 22 of FIG. 1.

FIG. 3 is a cross sectional view, in part similar to FIG. 2, showing the latch mechanism in its released position.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A lunch kit embodying this invention is identified generally'by the reference numeral 11. Although the invention is described in connection with such a' lunch kit, it is to be understood that the latch which forms the subject of this invention may be used in other environments. The invention does, however, have particular utility in connection with lunch kits where low cost and foolproof operation is particularly desired.

The lunch kit includes a main body portion 12 that is formed from sheet metal or the like and which is formed with an internal cavity that is adapted to hold articles of food or the like. A cover 13 is hingedly connected to the body portion 12 along one of its peripheral edges in any known manner. The cover 13 is pivotal between an opened position and a closed position, as shown in the drawing. The cover 13 is also formed from sheet metal or the like. A latch mechanism, indicated generally by the reference numeral 14, is positioned adjacent the free end of the cover 13 for holding the cover 13 in a closed position relative to the body 12. The latch mechanism 14 includes a latch piece 15 that is formed from nylon or another spring-like resinous plastic material. The piece 15 has a generally tapered base portion 16 that is adapted to be fixed to the body member 12 by means of a metal attaching clip 17. The clip 17 has tabs 18 that interlock with the body member 12 for securing the elements together.

Extending integrally from the base portion 16 is a shank portion 18 that has an offset upper extremity to clear a rolled over bead 19 formed at the lower periphery of the cover 13. The cover l3 is indented, as at 21, contiguous to the latch mechanism 14 so that the bead 19 serves as a keeper, as will become apparent.

At the upperextremity of the shank portion 18, the latch piece 15 is formed with an integral arcuately shaped latch portion 22. The latch portion 22 has a nose 23 that is adapted to engage the bead 19 at the indented portion 21 for retaining the cover 13 in a closed position (FIG. 2).

A handle portion 24 is integrally connected to the upper end of the shank portion 18 and is also arcuate in shape. The latch portion 22 and handle portion 24 form a substantiallycontinuous arcuate head disposed at the upper end of the shank portion 18 so as to provide a generally T-shaped configuration. The exposed upper surface of the handle portion 24 is formed with integral transversely extending ribs 25 so as to provide a more easily gripped surface.

The latch piece 15 is, as has been noted, resilient and is nonnally maintained by its resilience in the position shown in FIG. 2. In order to release the latch mechanism l4, thumb pressure is applied to the handle portion 24 via ribs 25. This pressure will cause cantilever deflection of the shank portion 18 relative to the base portion 16. The latch portion 22 and particularly its nose 23 will then snap clear of the bead 19 to the position shown in FIG. 3. In this position, the cover 13 may be pivoted to its opened position.

Upon subsequent release of the pressure from the handle portion 24, the latch piece 15 will return to the position shown in FIG. 2. When the cover 13 is again closed, the bead 19 will engage the arcuate upper surface of the latch portion 22 and exert a pressure upon the shank portion 18 that again causes it to deflect as a cantilever beam. When the bead l9 registers with the latch portion of nose 23, the latch piece 15 will again be biased by its own resilience to the latch position shown in FIG. 2. No positive operation is, therefore, necessary to lock the cover 13 in its closed condition.

} I claim:

1. A latch having a closure member or the like, said latch comprising a latch member formed from a resilient plastic material and-having a base portion adapted to be secured to a first member, a shank portion integrally connected to said base portion and extending in cantilevered fashion therefrom, a cross head formed integrally at the other end of said shank portion, one part of said cross head comprising a latching portion adapted to coact with a keeper fixed to a second member for securing the first and second members together, the other part of said cross head forming a handle portion, and transversely extending ribs formed on said handle portion of said cross head for providing a gripping surface for resilient cantilevered deflection of said shank portion upon the application of pressure to said handle portion for movement of said latch portion from a latched position to a released position and the return to itslatched position upon removal of said pressure, said shank portion being offset adjacent said latching 3 4 portion for providing a clearance between said shank erate with the keeper and to be cammed by the keeper portion and the cooperating keeper. to its released position upon subsequent movement of 2. A latch as set forth in claim 1, wherein the latching the first and second members together. portion terminates in an arcuate nose adapted to coop-

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1242391 *Jan 26, 1917Oct 9, 1917Charles UlrichWindow-catch.
US1316818 *Jan 23, 1918Sep 23, 1919 Quick-detachable shipping-case cover
US2315415 *Oct 12, 1939Mar 30, 1943George BricklerSanitary milking receptacle
US2873880 *Jul 15, 1957Feb 17, 1959Ernest A PoulosCombined garbage can handle and latch
US3050322 *May 16, 1960Aug 21, 1962Daryl Ind IncReleasable latch assembly
US3144166 *Jan 5, 1962Aug 11, 1964Jr Eason CrossCatch mechanism
US3630558 *Aug 28, 1970Dec 28, 1971Bell Telephone Labor IncQuick-mounting hardware
US3711140 *Apr 9, 1971Jan 16, 1973Onori BCabinet door latch
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4043349 *Jan 19, 1976Aug 23, 1977Susan GaysRemovable crib canopy
US4057879 *Jun 23, 1976Nov 15, 1977E. I. Du Pont De Nemours And CompanyHeaders with insertable latch members
US4114934 *Apr 23, 1976Sep 19, 1978Kelly Donald VHandle for sliding window
US4209916 *Sep 25, 1978Jul 1, 1980Doyel John SHand-operated kitchen appliance for drying vegetables and the like
US4216984 *Jan 8, 1979Aug 12, 1980Brunswick CorporationAutomatic locking latch
US4261479 *Mar 14, 1980Apr 14, 1981James CasertaReleasable lid clasp for cans
US4270668 *Feb 5, 1980Jun 2, 1981Shop-Vac CorporationBuckle or latch for holding lid to container
US4344646 *May 27, 1980Aug 17, 1982Woodstream CorporationDetachable latch
US4411445 *Jun 15, 1981Oct 25, 1983Adidas - Fabrique De Chassures De SportSki binding to secure a shoe to a ski
US4496177 *Jun 25, 1982Jan 29, 1985Thomson-BrandtLatch for the closure panel of a unit such as a cassette reader and a unit fitted with said latch
US4714284 *Apr 24, 1984Dec 22, 1987Varlet Marc FLatch assembly
US5024471 *Jul 25, 1990Jun 18, 1991Rubbermaid IncorporatedSafety release latch
US5123681 *Mar 20, 1991Jun 23, 1992Fluoroware, Inc.Latch for wafer storage box for manual or robot operation
US5193706 *Jan 26, 1990Mar 16, 1993Rubbermaid IncorporatedToolbox
US5238142 *Dec 7, 1992Aug 24, 1993Rubbermaid IncorporatedToolbox
US5319937 *Apr 26, 1993Jun 14, 1994Igloo Products CorporationThermoelectric cooler and warmer
US6267078 *Apr 21, 1997Jul 31, 2001Servando Ronald PinaPortable cat litter case and travel kit
US6568719 *Apr 6, 2001May 27, 2003Itw Industrial Components, S.R.L.Door opening device, in particular for an electric household appliance door
US7427085Apr 9, 2004Sep 23, 2008Yeok Sing SioCatch
US7976604 *Aug 21, 2008Jul 12, 2011Mann + Hummel GmbhFilter housing with quick release clip adapted to disengage the filter element
US8481894 *Jan 31, 2011Jul 9, 2013Seb S.A.Electrical cooking apparatus provided with a removable cooking plate
US20030160057 *Jun 22, 2001Aug 28, 2003Wiggo-Arne JohansenBlocking device for a waste container lid
US20040207216 *Apr 9, 2004Oct 21, 2004Sio Yeok SingCatch
US20100043367 *Aug 21, 2008Feb 25, 2010Mann+Hummel GmbhFilter housing with quick release clip adapted to disengage the filter element
US20110186562 *Aug 4, 2011Seb S.A.Electrical Cooking Apparatus Provided with a Removable Cooking Plate
US20140299658 *Dec 7, 2011Oct 9, 2014Wincor Nixdorf International GmbhCash cassette with electronic money seal
CN102164430A *Jan 31, 2011Aug 24, 2011Seb公司Electrical cooking appliance with removable hot plate
CN102164430B *Jan 31, 2011Aug 5, 2015Seb公司具有可拆卸烹饪板的电烹饪装置
DE2655031A1 *Dec 4, 1976Jun 15, 1978Messerschmitt Boelkow BlohmPlastics door catch - comprises L=shaped support and L=shaped catch with hinge section provided between the members
DE4120551A1 *Jun 21, 1991Jan 9, 1992Toshiba Kawasaki KkVerriegelungsmechanismus zum halten eines bewegbaren elements in einer schliessstellung
EP0069609A1 *Jun 8, 1982Jan 12, 1983SOCIETE D'ELECTRONIQUE INDUSTRIELLE de MOULINS - SELIMOCatch for the lid of an apparatus such as a cassette reader, and apparatus having such a catch
U.S. Classification292/87, 292/DIG.380, 206/541
International ClassificationE05C19/06
Cooperative ClassificationE05C19/06, Y10S292/38
European ClassificationE05C19/06
Legal Events
Jan 28, 1991ASAssignment
Effective date: 19891212
Jan 28, 1991AS02Assignment of assignor's interest
Effective date: 19891212