John D Marsh

US Patent:

46468315, Mar 3, 1987

Filed:

Sep 14, 1984

Appl. No.:

6/650665

Inventors:

John L. Marsh - Cupertino CA
Edward C. Fraser - Cupertino CA
Louis H. Rorden - Los Altos CA
William H. Bauer - Moraga CA

Assignee:

Develco, Incorporated - Sunnyvale CA

International Classification:

E21B 1714
E21B 4900
F16D 100

US Classification:

166242

Abstract:

For the directional drilling of boreholes, the orientation of accelerometer modules, magnetometer modules and gyroscopes or other directional sensing devices must be accurately known and maintained with respect to each other and to external mounting devices. This is accomplished by a self-aligning segmented cylindrical connection which accurately maintains modules in rotational alignment with each other for all three directions of rotation, even if the mating surfaces of the connection experience wear due to rough use in the drilling application or repeated calibration in a calibration fixture. Wedged surfaces on each of the male and female portions of the connection constitute the mating surfaces, and are the only surfaces at which the male and female portions contact one another. A depression between the mating surfaces defined by the female portion permits reproducible angular displacement of one portion with respect to the other even if one or both portions are worn. The connection has great ability to resist relative rotation of the two segments being connected under the application of a bending force because the connection, by its unique design, translates bending load into tensile load with respect to the screws which fasten the connection together.

US Patent:

48917346, Jan 2, 1990

Filed:

Jun 15, 1988

Appl. No.:

7/206837

Inventors:

Henry S. More - Los Altos CA
John L. Marsh - Cupertino CA

Assignee:

Quantum Solutions, Inc. - Santa Clara CA

International Classification:

H05K 506
H05K 720

US Classification:

361417

Abstract:

An elastomeric body encapsulates an electronic assembly, to be protected from vibration on shock, and is confined in a closed cavity of a structure subject to the vibration and shock. The body is cast in a separate mold having a cavity corresponding in shape and size to the closed cavity. The surface of the mold has projections to form indentations in the surface of the body. With the body in the closed cavities, the indentations are effectively voids and accept elastomeric material displaced from the body when the body expands relative to the cavity. The preferred embodiment provides a strongback support with open cavities, each to receive a body. The strongback is inserted into a tube to complete the structure and close the open cavities. The strongback has wiring chambers to accept flexible leads connected to each body, and channels into which wire is potted, to extend from the leads to external circuitry. To retain the bodies in the open cavities before closing, the elastomer bodies have projections that resiliently engage cooperation surfaces in the cavities.

US Patent:

20210122390, Apr 29, 2021

Filed:

Oct 25, 2019

Appl. No.:

16/663725

Inventors:

- Auburn Hills MI, US
John MARSH - San Jose CA, US
Gaurav AGARWAL - Pune, IN
Cedric KETELS - Mountain View CA, US
Michael TWORK - Clarkston MI, US
Christophe BRUNARD - Bois-Colombes, FR

International Classification:

B60W 50/16
G06F 3/041
G06F 3/044

Abstract:

An opening switch for a vehicle having a decorative cover assembly, a sensor housing region, and a microelectromechanical (MEMS) sensor mounted in the sensor housing region. The decorative cover assembly has an inner surface, an outer surface, an anchor portion, and a deflection portion. When contact from a vehicle user occurs at the deflection portion in the decorative cover assembly, a microdeflection occurs. The microdeflection has a microdeflection apex, and the microdeflection apex is spaced from other surfaces in the sensor housing region when the contact from the user occurs at the deflection portion in the decorative cover assembly. The MEMS sensor is configured to generate an output signal that is indicative of a force of the contact from the user. The force integrated switch can include haptic feedback and/or backlighting.

US Patent:

20150182972, Jul 2, 2015

Filed:

Dec 23, 2014

Appl. No.:

14/582178

Inventors:

John Anthony Marsh - Watsonville CA, US

International Classification:

B03B 5/26

Abstract:

A sluice box is described comprising two walls, and a plurality of riffles. Riffles can have a first portion that extends below the bottom panel of a sluice box (or the bottom of a flow), and a second portion that extends above the bottom panel of a sluice box (or the bottom of a flow). By creating a catch in a riffle by having a portion of the riffle extend below a bottom panel of a sluice box, heavier minerals are not washed away as quickly, if at all, as with other sluices.

Address:

359 S Cass Lk Rd, Waterford, MI 48328

Phone:

2486740958

VIN:

1FTFW1ET7CFC54310

Make:

FORD

Model:

F-150

Year:

2012

Address:

8770 S Shr Dr, Clarkston, MI 48348

VIN:

1D8GU28K78W138603

Make:

DODGE

Model:

NITRO

Year:

2008