Hydraulic tool system

Details Hydraulic tool system Hydraulic tool system

1987-06-24

1988-02-09

Ostrager, Allen M.

Expansible chamber devices

Effective area of working member end face selectively variable

With diaphragm

92 29, F01B 3100, F01B 900

Patent

active

047234792

ABSTRACT:
A system of hydraulic tools utilizing removably, replaceable and substantially interchangeable valve assemblies, fluid reservoirs and hydraulic driving mechanisms. The fluid reservoir maintains the hydraulic fluid under moderate pressure. The valve assembly can contain a hydraulic pump for powering the driving mechanism. The hydraulic pump preferably has displacement varying means for changing the power transfer ratio of the pump. The hydraulic assemblies are removably received in a variety of tool bodies.

REFERENCES:
patent: 2059446 (1936-11-01), Eastman
patent: 2091876 (1937-08-01), Oldham
patent: 2434296 (1948-01-01), Swanson
patent: 3498188 (1970-03-01), Rodriguez
patent: 3812766 (1974-05-01), Weiss
patent: 3994205 (1976-11-01), Ekdahl et al.
patent: 4080875 (1978-03-01), Repolovsky et al.
patent: 4480531 (1984-11-01), Mylius et al.

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