Hydraulic tool

Patent · Tue Apr 05 00:00:00 EDT 1988

OSTI ID:5007474

Gregory, J T

A hydraulic force-delivering tool including a cylinder, a piston slidable in the cylinder and a hydraulic pump to deliver fluid under pressure to the cylinder the hydraulic pump is described, comprising: a pump body; means forming a cylindrical chamber in the pump body; at least one inlet port opening into one end of the chamber from outside the body; means forming an outlet port at the other end of the chamber; a check valve in the outlet port enabling outward flow only; a pump rod plunger reciprocable through a given stroke in the chamber; inner and outer concentric cylindrical surfaces in the chamber and on the plunger, respectively; an annular shoulder on the chamber inner cylindrical surface facing toward the other end of the chamber; an annular seal member slidable along the pump rod and conditioned to seal against the shoulder; and spring means biasing the seal member toward the shoulder.

• Assignee: Gregory Co., Menlo Park, CA
• Patent Number(s): US 4735048
• OSTI ID: 5007474
• Resource Relation: Patent File Date: Filed date 24 Oct 1986
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
HYDRAULIC EQUIPMENT
DESIGN
HYDRAULICS
LIQUID FLOW
PISTONS
PUMPS
RELIEF VALVES
SEALS
SPRINGS
TOOLS
CONTROL EQUIPMENT
EQUIPMENT
FLOW REGULATORS
FLUID FLOW
FLUID MECHANICS
MACHINE PARTS
MECHANICS
VALVES
320106* - Energy Conservation
Consumption
& Utilization- Building Equipment- (1987-)