Inventor

Keith V. Leigh-Monstevens

Inventor

Troy, MI, US

Overview

1977–2009

Patent span

Mechanical engineering

Primary field (CPC F)

Patents· 82 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

F16Dprimary

F16DCouplings for transmitting rotation29%

Y10TTechnical subjects covered by former us classification14%

B60TVehicle brake control systems or parts thereof11%

F15BSystems acting by means of fluids in general11%

F16HGearing8%

F16LPipes6%

F16JPistons3%

H01HElectric switches3%

B60RVehicles, vehicle fittings, or vehicle parts, not otherwise provided for2%

B65DContainers for storage or transport of articles or materials, e.g. bags, barrels, bottles, boxes, cans, cartons, crates, drums, jars, tanks, hoppers, forwarding containers2%

PatentTitleYear

7,513,557'Seating and protector accessory'2009 7,222,486'Diaphragm assembly'2007 7,001,561'Right angle tube connector'2006 6,789,388'Triple action damper for hydraulic clutch actuator'2004 6,389,956'Concentrically mounted hydraulic clutch slave cylinder'2002 6,374,724'Concentrically mounted hydraulic clutch slave cylinder'2002 6,095,306'Pushrod impact isolator'2000 5,716,081'Spring clip for quick connect coupling'1998 RE034987'Modular hydraulic control apparatus with quick connect coupling'1995 5,267,635'Clutch actuator system'1993 RE034064'Electric shift apparatus'1992 5,113,657'Modular hydraulic control apparatus'1992 5,094,079'Master cylinder assembly'1992 5,083,433'Prefilled hydraulic actuator apparatus with separate reservoir and quick-connect between them'1992 5,070,983'Damper for hydraulic clutch actuator'1991 5,065,135'Transmission logic controlling starter motor and backup light'1991 5,042,133'Testing method for electric shift control apparatus'1991 5,035,158'Electric shift and transfer case apparatus with control system therefore'1991 5,020,326'Hydraulic control system with prefilled pressurized reservoir'1991 5,018,352'Modular prefilled hydraulic control apparatus'1991 5,014,038'Motor vehicle control system'1991 5,002,166'Dual mode motor vehicle clutch control system'1991 4,993,529'Concentrically mounted hydraulic clutch actuator'1991 4,981,202'Motor vehicle control system'1991 4,979,366'Method of providing modular prefilled hydraulic control apparatus'1990 4,980,668'Motor vehicle control system'1990 4,959,188'Method for forming a hydraulic cylinder assembly'1990 4,949,590'Hydraulic cylinder assembly'1990 4,949,827'Concentrically mounted hydraulic clutch actuator'1990 4,941,323'Hydraulic cylinder provided with a seal-less piston'1990 4,936,428'Electric clutch actuator'1990 4,924,673'Master cylinder with parallel-bore reservoir'1990 4,918,921'Coaxial push rod and hollow screw ball nut drive for master cylinder'1990 4,914,916'Tandem master cylinder with electromagnetic position sensors for each piston'1990 4,915,202'Concentrically mounted hydraulic clutch actuator'1990 4,911,276'Method of motor vehicle assembly'1990 4,893,472'Collapsible tubular diaphragm for master cylinder reservoir'1990 4,883,037'Throttle control system'1989 4,878,041'Hydraulic master cylinder switch'1989 4,866,937'Double-acting master-slave cylinder system with volume compensating conduit'1989 4,865,173'Electric clutch actuator'1989 4,856,282'Center-feed master cylinder with retainer for valve stem'1989 4,852,352'Manual override for relief of pulsator circuit with reservoir ball valve'1989 4,843,901'Electric shift apparatus with manual override'1989 4,841,793'Electric shift apparatus'1989 4,831,916'Piston assembly'1989 4,831,985'Throttle control system'1989 4,827,834'Four point seal'1989 4,821,627'Piston and cylinder assembly'1989 4,817,468'Electric shift apparatus for manual transmission'1989 RE032814'Hydraulic cylinder modular structure'1989 4,790,204'Electric shift apparatus'1988 4,788,821'Hydraulic shift for motor vehicle transmission'1988 4,785,615'Hydraulic shift for motor vehicle automatic transmission'1988 4,785,721'Hydraulic cylinder annular insert for retainer member'1988 4,771,874'Self-aligning bearing'1988 4,756,159'Prefilling apparatus for modular prefilled hydraulic control apparatus'1988 4,742,902'Clutch release bearing and bearing carrier assembly'1988 4,719,444'Hydraulic master cylinder switch'1988 4,712,640'Hydraulic remote control for motor vehicle manual shift transmission'1987 4,708,228'Bearing support for motor vehicle clutch control apparatus'1987 4,705,151'Hydraulic slave cylinder interlock switching device with proximity sensor'1987 4,687,084'Clutch release apparatus for pull type clutches'1987 4,684,003'Concentric slave cylinder for motor vehicle clutch control mechanism'1987 4,665,802'Shipping and installation restraining strap for slave cylinder'1987 4,660,694'Prefilled hydraulic control apparatus for motor vehicle mechanical clutch'1987 4,640,478'Quick connect cylinder mount structure'1987 4,624,290'Prefilled hydraulic control apparatus for motor vehicle'1986 4,624,291'Method of prefilling modular hydraulic control apparatus'1986 4,621,565'Hydraulic slave cylinder switch'1986 4,617,855'Hydraulic slave cylinder switch'1986 4,607,670'Modular prefilled hydraulic control apparatus'1986 4,590,765'Hydraulic cylinder modular structure'1986 4,585,107'Throw-out bearing carrier member for motor vehicle clutch control mechanism'1986 4,585,108'Hydraulic slave cylinder for motor vehicle clutch control mechanism'1986 4,585,109'Motor vehicle clutch control mechanism'1986 4,566,578'Clutch throw-out bearing and bearing carrier assembly'1986 4,557,361'Shipping and installation strap for linear actuator'1985 4,551,976'Shipping and installation strap for linear actuator'1985 4,488,701'Quick connect cylinder mount structure'1984 4,454,632'Shipping and installation strap for linear actuator'1984 4,044,873'Driven plates for friction clutches'1977

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1977Based in Leamington Spa, GB· patent location history

1984–1995Patents assigned to AUTOMOTIVE PRODUCTS PLC (58)· patent assignee history

1984–1992Based in Troy, MI, US· patent location history

1988–1989Patents assigned to LEIGH MONSTEVENS KEITH V (7)· patent assignee history

1989Patents assigned to MABEE BRIAN D (2)· patent assignee history

1989Patents assigned to PETERSON DAVID C (2)· patent assignee history

1990–2006Patents assigned to AUTOMOTIVE PROD USA (10)· patent assignee history

1991–2009Based in Rochester Hills, MI, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
AUTOMOTIVE PRODUCTS PLC	58	1984–1995
AUTOMOTIVE PROD USA	10	1990–2006
LEIGH MONSTEVENS KEITH Vself	7	1988–1989
MABEE BRIAN D	2	1989
PETERSON DAVID C	2	1989

Locations

Location	Patents	Span
Troy, MI, US	69	1984–1992
Rochester Hills, MI, US	12	1991–2009
Leamington Spa, GB	1	1977