Pumps – Expansible chamber type – Pumping member position controlled port
Patent
1990-01-23
1991-07-16
Smith, Leonard E.
Pumps
Expansible chamber type
Pumping member position controlled port
184 33, F04B 706
Patent
active
050320670
ABSTRACT:
The invention is directed to a motor-driven apparatus such as a motor-driven chain saw and the like having a lubricating oil pump having a piston which rotates about its central axis and an oil supply for a work tool. There is also a control means containing a rotating piston having cam member on the piston interacting with a control pin member which acts as a cam follower. There is provided means for adjusting the percentage of contact made between the cam member and the cam follower per revolution of the pumping member.
REFERENCES:
patent: 2347364 (1944-04-01), Palumbo
patent: 3914073 (1975-10-01), Fusco
patent: 4541789 (1985-09-01), Northdurf
patent: 4636147 (1987-01-01), Schweitzer
patent: 4661051 (1987-04-01), Nakamura et al.
patent: 4678411 (1987-07-01), Wieland
patent: 4797073 (1989-01-01), Kubota
Ogman Abraham
Smith Leonard E.
Szczecina Jr. Eugene L.
Textron Inc.
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