Pumps – Expansible chamber type
Patent
1984-06-25
1987-06-09
Croyle, Carlton R.
Pumps
Expansible chamber type
417DIG1, 291564R, 29270, 29458, 295272, 264274, 264277, 2642791, F04B 2100, B23P 1500
Patent
active
046717463
ABSTRACT:
A base component for a fluid transfer device such as a hydraulic hand pump, cylinder or valve and a method of making the base component for such a device. The base component includes first and second base members having internal passages in communication with one another which subject the members to internal fluid pressure, and an encapsulating housing attaching the members together. In one form, the housing is composed of a moldable plastic material and surrounds both base members which are composed of extruded aluminum. In another form, the housing is integrally formed with one of the base members of a moldable plastic material and surrounds the other base member which is composed of extruded aluminum. In both forms structural members such as yoke members, which pivotally mount the piston and handle assemblies of a hand pump, may integrally be formed with the plastic housing. The method includes the steps of forming first and second base members having internal passages in fluid communication with each other, and encapsulating the base members with a moldable plastic material to attach the base members together. The encapsulation with plastic may either be performed as a separate step to attach the two base members or may be performed simultaneously with the forming of one of the base members so that the housing is integral therewith.
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Applied Power Inc.
Croyle Carlton R.
Neils Paul F.
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