CA563083A - Hydraulic valve device - Google Patents

Hydraulic valve device

Info

Publication number
CA563083A
CA563083A CA563083A CA563083DA CA563083A CA 563083 A CA563083 A CA 563083A CA 563083 A CA563083 A CA 563083A CA 563083D A CA563083D A CA 563083DA CA 563083 A CA563083 A CA 563083A
Authority
CA
Canada
Prior art keywords
valve device
hydraulic valve
hydraulic
valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CA563083A
Other languages
French (fr)
Inventor
A. Moosman Jack
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Johnston Testers Inc
Original Assignee
Johnston Testers Inc
Publication date
Application granted granted Critical
Publication of CA563083A publication Critical patent/CA563083A/en
Expired legal-status Critical Current

Links

CA563083A Hydraulic valve device Expired CA563083A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA563083T

Publications (1)

Publication Number Publication Date
CA563083A true CA563083A (en) 1958-09-09

Family

ID=35729525

Family Applications (1)

Application Number Title Priority Date Filing Date
CA563083A Expired CA563083A (en) Hydraulic valve device

Country Status (1)

Country Link
CA (1) CA563083A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4928775A (en) * 1988-12-30 1990-05-29 Gas Research Institute Downhole surge valve for earth boring apparatus
US4958689A (en) * 1988-12-30 1990-09-25 Gas Research Institute Method of providing a high pressure surge of working fluid to an underground percussive mole

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4928775A (en) * 1988-12-30 1990-05-29 Gas Research Institute Downhole surge valve for earth boring apparatus
US4958689A (en) * 1988-12-30 1990-09-25 Gas Research Institute Method of providing a high pressure surge of working fluid to an underground percussive mole

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