David L Roth

US Patent:

20050241796, Nov 3, 2005

Filed:

Apr 29, 2004

Appl. No.:

10/835800

Inventors:

Markus Lettmann - Northville MI, US
David Roth - West Bloomfield MI, US
Thomas Glas - Plymouth MI, US
Norbert Schneider - South Lyon MI, US
Giang Nguyen - Northville MI, US
Rodrigo Consentino - Mogi Mirim, BR

International Classification:

B22D015/00

US Classification:

164127000, 164352000

Abstract:

For the production of piston pins having a hard peripheral area, a relatively inexpensive chill casting method is used. A chill form having a mold cavity for a piston pin is embedded in a casting mold, cast iron is poured into the mold cavity of the chill form, and then the peripheral area of the piston pin that results from this process is cooled by means of the chill form, is white-solidified, and thereby forms a hard wear-resistant surface.

US Patent:

42854709, Aug 25, 1981

Filed:

Aug 3, 1979

Appl. No.:

6/063473

Inventors:

David W. Roth - Detroit MI

Assignee:

The 2500 Corporation - Lathrup Village MI

International Classification:

B05B 110
B60S 152

US Classification:

239284A

Abstract:

The specification discloses a self-contained headlamp washer system which consists of an electrical pump assembly, flexible washer fluid container, headlamp washer assembly, and a tubular hosing connecting means. Two (2) embodiments of the invention are disclosed by applicant, i. e. : a self-contained headlamp washer system in which the headlamp washer nozzle assembly is contained within and by the headlamp bezel, and a headlamp washer nozzle assembly which is of a two-piece construction independent of the headlamp bezel, said washer nozzle assembly is capable of being either attached or clipped on to any existing headlamp bezel. In both disclosed embodiments, applicant prefers that the headlamp washer nozzle assembly be made from a molded plastic material of high strength and impact resistant characteristics. The headlamp washer nozzle assembly is specifically designed so that no part thereof protrudes on, or covers any portion of the vehicle headlamp, and has a specially constructed long fluid passageway and washer fluid discharge apertures which allow the placement of the washer fluid over the entire surface of the vehicle headlamps in a controlled and more effective cleaning pattern.

US Patent:

48296279, May 16, 1989

Filed:

Oct 15, 1987

Appl. No.:

7/109291

Inventors:

Mark Altus - Huntington Wood MI
David W. Roth - Grosse Pointe Park MI

Assignee:

The 2500 Corporation - Birmingham MI

International Classification:

B32B 306

US Classification:

16 4

Abstract:

There is disclosed a method of attaching retainers to automotive floor mats, as well as an embodiment of a floor mat utilizing said method. The typical floor mat utilizing this method will have a retainer with a series of male or female fasteners provided on the retainer, and the floor mat will have openings corresponding to these fasteners, through which the other fastener, whether it be male or female, can be passed to firmly attach the floor mat to the retainer. The retainer may be one sided or two sided, their may, or may not be holes in the floor mat, depending on the particular fasteners being used, the openings in the floor mat, if provided, may, or may not, be reinforced, and a heel pad can optionally be attached at the same time.

US Patent:

43616100, Nov 30, 1982

Filed:

Mar 17, 1980

Appl. No.:

6/131262

Inventors:

David W. Roth - Detroit MI

Assignee:

The 2500 Corporation - Lathrup Village MI

International Classification:

B32B 306
B60J 900

US Classification:

428 95

Abstract:

The specification discloses a non-skid carpet protector which has numerous stiff bristles placed on the underside thereof to prevent movement upon the entry and existing of occupants of a motor vehicle. Two modifications of the invention are disclosed by Applicant, i. e. a non-skid carpet protector which covers only a limited area of the horizontal part of the motor vehicle passenger compartment floor, near the vehicle's brake and accelerator, and a non-skid carpet protector which covers a substantial portion of both the horizontal and vertically inclined portion of the floor of the motor vehicle passenger compartment. The non-skid carpet protector is specifically designed so that it may be easily secured to the floor carpet within a motor vehicle, by the application of a vertical pressure on top of said non-skid carpet protector, thus causing the stiff bristles to effectively engage in a frictional relationship the underlying carpet to be protected.

US Patent:

45886288, May 13, 1986

Filed:

Oct 9, 1984

Appl. No.:

6/658643

Inventors:

David W. Roth - Grosse Pointe Park MI

Assignee:

The 2500 Corporation - Birmingham MI

International Classification:

B32B 306
B60J 900

US Classification:

428 85

Abstract:

There is disclosed an improved floor mat construction, including a floor mat having at least one carpeted surface to which is attached, via suitable attaching means, a retainer to prevent movement of the floor mat relative to a vehicle carpet. The retainer generally has an upper bristled surface and a lower bristled surface divided by a planar surface. One or both of said upper bristled surface and said lower bristled surface may be tapered for all or part of its length.

US Patent:

45633789, Jan 7, 1986

Filed:

Mar 9, 1984

Appl. No.:

6/587802

Inventors:

David W. Roth - Grosse Pointe Park MI

Assignee:

The 2500 Corporation - Birmingham MI

International Classification:

B32B 302

US Classification:

428 86

Abstract:

The specification discloses an improved automotive type carpet construction and method for manufacture thereof. The construction disclosed is particularly useful for lining the trunk of an automobile, the bed of an automotive type station wagon, or on the floor of a van type vehicle, where it is desired to have a construction which is light in weight, waterproof, easy to clean up, and yet can be made in a color to match the interior carpeting of the automobile. The construction disclosed has a primary layer of a ribbon fiber woven in a plain weave, with a continuous filament yarn inserted with a needled motion, and a bonding layer applied to the back thereof in a continuous hot melt flow. A non-skid layer may also be applied, if desired. The carpet construction is then die cut into one or more pieces with the piece(s) being sewn together or a binding being applied thereto.

US Patent:

52177831, Jun 8, 1993

Filed:

Jul 9, 1990

Appl. No.:

7/549833

Inventors:

David W. Roth - Grosse Pointe Park MI

Assignee:

The 2500 Corporation - Farmington Hills MI

International Classification:

B32B 302
B32B 3300

US Classification:

428 92

Abstract:

The specification discloses a two-sided carpet construction and a method for the continuous manufacture thereof. The carpet manufacturing process begins by tufting a carpet yarn into a scrim layer. The process continues up to the point where the bonding material is applied to the carpet scrim to lock the tufts of the carpet fiber in place. In the process disclosed herein, immediately after the bonding material is applied, a piece of carpet material, by which may be similar to the piece just described, or which may be different in color or construction from that just described, is continuously applied in 180. degree. opposed relationship on the top of the bonding material just applied. The carpet construction thus formed is then passed through pressure applying means to firmly force the bonding material into the carpet tufts and carpet scrim to form a continuous piece of two-sided carpet material having approximately half the weight of bonding materials of previous constructions.

US Patent:

20210214021, Jul 15, 2021

Filed:

Jan 13, 2020

Appl. No.:

16/741252

Inventors:

- Detroit MI, US
Xiaosong Huang - Novi MI, US
Gurpinder Dhaliwal - Sterling Heights MI, US
David E Roth - Ferndale MI, US
Tejas R. Bhavsar - Troy MI, US

Assignee:

GM GLOBAL TECHNOLOGY OPERATIONS LLC - Detroit MI

International Classification:

B62D 29/04
B60R 19/02
B60R 19/03
B62D 21/15

Abstract:

Presented are multilayer, fiber-reinforced impact protection structures with honeycomb-core or corrugated-layer designs, methods for making/using such structures, and vehicles with traction battery packs supported on skid plates fabricated from such structures. A multilayer impact protection structure includes a first layer with continuous fibers embedded in a polymeric matrix, and a second layer that is attached to the first layer and includes an elastomeric polymer. A third layer, which is attached to one side of the first layer opposite that of the second layer, includes a fiber-reinforced polymer honeycomb and/or corrugated structure. An optional fracture detection circuit is attached to the first or third layer, and is configured to detect a break in the impact protection structure. The corrugated structure may include multiple reinforcement ribs that are interposed within and substantially orthogonal to a series of mutually parallel, elongated ridges. Comparatively, the honeycomb structure includes a lattice of adjoining polygonal cells.