David R Grenell

US Patent:

D468032, Dec 31, 2002

Filed:

Dec 27, 2001

Appl. No.:

29/152744

Inventors:

David Grenell - North Woodmere NY 11581

International Classification:

2601

US Classification:

D26 13

US Patent:

42881102, Sep 8, 1981

Filed:

Oct 9, 1979

Appl. No.:

6/082717

Inventors:

David Grenell - Laurelton NY

Assignee:

Allen-Stevens Corp. - Woodside NY

International Classification:

F16L 3324

US Classification:

285174

Abstract:

An end fitting for a flexible metallic conduit comprises a tubular body having an external thread to enable the body to be screwed into an end of a conduit, a tubular sleeve having an external thread to enable the end fitting to be threadedly mounted on a support, and a rotary tubular collar threadedly mounted on a stationary projection of one-piece with the body. The collar has an inner circumferential tapered surface which bounds a wedge-shaped annular space with the externally threaded end of the body. The conduit is received in wedged, moisture-resistant engagement in the space. A stressed O-ring seal between the sleeve and the stationary projection provides another moisture-resistant seal.

US Patent:

43424937, Aug 3, 1982

Filed:

Oct 20, 1980

Appl. No.:

6/198811

Inventors:

David Grenell - Laurelton NY

Assignee:

Allen-Stevens Corp. - New York NY

International Classification:

H01R 1346

US Classification:

339 44M

Abstract:

Electrical devices of outdoor electrical receptacles are protected from weather conditions. A protective cover and a waterproofing gasket are pivotally mounted on a plate for movement along a circular path between a fully closed position, in which the gasket prevents water from reaching the device, and a fully open position, in which access to the electrical device is permitted. A leaf spring having a planar movable portion constantly and affirmatively urges the cover to the closed position. In order to ensure a reliable and automatic return of the cover to the closed position, an anti-over-the-center stop prevents a leading end of the cover, which engages the planar spring portion at a contact zone, from moving the latter beyond an imaginary line which extends from the center of curvature of the circular path in a radial direction towards, and at a right angle to, the plane of the spring portion. The cover is easily mounted by snap-type action to the plate under spring tension.

US Patent:

42715547, Jun 9, 1981

Filed:

Jan 9, 1979

Appl. No.:

6/002221

Inventors:

David Grenell - Laurelton NY

Assignee:

Allen-Stevens Corp. - Woodside NY

International Classification:

B23G 506

US Classification:

10152T

Abstract:

An elongated rectilinear tool for formation of a threaded hole in ductile metal by the coining or flowing of the metal. The tool typically is employed to form through threaded holes in a piece of ductile metal, and features a working end having a boring tip or drill point and a spade section having a flat shank with grooves in its lateral edges. The spade section holds the drill point and extends back a short distance from the working end. The diameter of the tool then enlarges slightly at a small inclined section which is followed by a longer coining tap section. The coining (flowing) of metal forms a thread on the previously smooth wall of the drilled hole, with peaks or crests, and roots. The lateral grooving of the spade section tracks, i. e. fits, into the fully formed threading as the present tool is screwed out.

US Patent:

D3104761, Sep 11, 1990

Filed:

Jun 25, 1987

Appl. No.:

7/066403

Inventors:

David Grenell - North Woodmere NY

Assignee:

Greenfield Diecasting Corp. - Freeport NY

US Classification:

D 8353