Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Reexamination Certificate
2005-08-30
2005-08-30
Watson, Robert C. (Department: 3723)
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
C029S261000
Reexamination Certificate
active
06935004
ABSTRACT:
The invention relates to an improved propellor puller device for pulling a propellor hub from a marine engine. The propellor puller has a hub base member that has a central axis and a multiplicity of puller arms extending radially from the central axis. A threaded bolt threadably engages the hub base member so that rotation of the bolt is translated into axial displacement of the hub base member. Tension members composed of a series of chain links are slidably carried by a respective puller arm and attachable by a hook to a propellor blade. As tension in the tension members increases, the tension members will slide radially inwardly towards the central axis. The bolt carries a live center member that compressively engages the propellor shaft as the hub base member is axially displaced and the live center member allows rotation of the bolt while the live center member is locked rotationally with the propellor shaft; the live center member prevents the centering recess on the propellor shaft from becoming distorted and promotes a uniform distribution of the tension forces acting on the propellor hub to separate the propellor hub from the propellor shaft.
REFERENCES:
patent: 1062000 (1913-05-01), Hahn
patent: 1402477 (1922-01-01), Carradus
patent: 1457795 (1923-06-01), Pizzuti
patent: 1620211 (1927-03-01), Jerabek
patent: 2074649 (1937-03-01), Herkimer
patent: 3846898 (1974-11-01), Kerr
patent: 3986242 (1976-10-01), Kerr
patent: 6665918 (2003-12-01), Williams
Jones Mark C.
Terrill George
Gotha Frederick
Watson Robert C.
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