Learn more

POWER JACKS LTD

Overview
  • Total Patents
    29
About

POWER JACKS LTD has a total of 29 patent applications. Its first patent ever was published in 1948. It filed its patents most often in United Kingdom, France and United States. Its main competitors in its focus markets machine tools, mechanical elements and civil engineering are LUDWIG EHRHARDT GMBH, ROEMHELD A GMBH & CO KG and UNIVER SPA.

Patent filings in countries

World map showing POWER JACKS LTDs patent filings in countries

Patent filings per year

Chart showing POWER JACKS LTDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Tridgell Cyril William 7
#2 William Tridgell Cyril 4
#3 Burwell Parrington Brian 2
#4 Northern Dennis George 2
#5 George Northern Dennis 2
#6 Greig Alan John 2
#7 Rodway John 2
#8 Sutherland James Steven 2
#9 Sutherland James 1
#10 Tridgell Cyril W 1

Latest patents

Publication Filing date Title
AU2002347381A1 A lead screw and nut assembly device
WO02093716A1 Improved electromechanical linear actuator
GB1330457A Workpiece clamp
GB1309088A Workpiece clamping devices
GB1126117A Improvements in or relating to devices for supporting workpieces
GB1078137A Improvements in or relating to hydraulic control apparatus
GB1078138A Improvements in or relating to hydraulic control apparatus
GB1078139A Improvements in or relating to hydraulic control apparatus
DE1502900A1 Power operated workpiece clamping device
GB972053A Improvements in or relating to non-return or similar valves
DE1293537B Pressure medium operated device for clamping workpieces
US3173673A Powered work-clamping device
GB929140A Improvements in or relating to hydraulic clamping systems
GB1003038A Improvements in or relating to powered work-clamping devices
US3064581A Reciprocating hydraulic pumps
GB960582A Improvements in or relating to reciprocating hydraulic pumps
GB876273A Improvements in or relating to hydraulic actuating mechanisms
GB763629A Improvements in or relating to engine-powered hydraulic actuating systems
GB724273A Improvements in or relating to hydraulic jacking systems
GB712491A Improvements in or relating to hydraulically elevated loading platforms