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Piston rod seal
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Patent number 4,135,723
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Issue date Jan 23, 1979
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F.B.J. Engineering Services Pty, Ltd.
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William J. Urquhart
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Pistons
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Patent number 4,048,975
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Issue date Sep 20, 1977
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F. B. J. Engineering Services Pty. Limited
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William James Urquhart
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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Pistons
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Patent number 4,048,908
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Issue date Sep 20, 1977
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F. B. J. Engineering Services Pty. Limited
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William James Urquhart
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...