US Patent: 3,218,980


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Pump

Patentee:

Lyle L. Arnes (exact or similar names) - Racine, WI

USPTO Classifications:

417/375, 91/309, 91/49

Tool Categories:

trade specific : vehicle repairer : vehicle mechanic

Assignees:

Walker Mfg. Co. (Racine) - Racine, WI

Manufacturer:

Walker Mfg. Co. (Racine) - Racine, WI

Witnesses:

Unknown

Patent Dates:
Granted:	Nov. 23, 1965

Patent Pictures:

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Description:

Seen in an ad for Walker air-operated hydraulic jacks, models J-612 (2 ton), J-613 (4 ton) and J-614 (10 ton). 120 psi compressed air is used to operate the jack at double the speed as hand pumping, according to the ad.