F - Mech Eng,Light,Heat,Weapons – 16 – H
Patent
F - Mech Eng,Light,Heat,Weapons
16
H
103/145
F16H 21/36 (2006.01) F04B 9/06 (2006.01)
Patent
CA 1255967
ABSTRACT OF THE DISCLOSURE The following specification discloses an apparatus and method for providing lifting motion on a substantially symmetrical and compact basis for a pump through a linkage, comprising two members pivotally coupled for relative movement driven by a gear reducer. The first member is driven in a rotational manner with the second member connected thereto being rotationally driven at the same angular velocity, but in the reverse direction thereto. The angular velocity of the members can be controlled by gears which can be eliptical, matched to an eliptically geared gear box for optimal acceleration outputs, or a timing chain and sprockets, or other timed drive means. As the first member rotates with the second member moving around the pivotal connection point at the same angular velocity, a lift point or pump connection is moved in a reciprocating manner to provide lift, such as to a polished rod assembly of an oil well rod pump. The members can be appropriately counterbalanced at an offset from the upper and lower lift points to provide rotationally angular counterbalance from the top and bottom lift points. The members can also be provided on either side of the gear reducer to provide dual lift points with one gear reducer and motor means. If a chain is used for timing the members, the chain can be enclosed in a housing with an oil bath which lubricates the chain and sprocket and associated bearings. Also, in lieu of counterweights an air balance piston can be used to balance a rod pump. When a gear reducer is used, the bull gear can be rotated by a gear in a lifting mode to relieve bearing load, while the orientation of the helical gears, if used, can be such to relieve side thrust.
547607
Bethel George F.
Bethel Patience K.
Erich Richard R.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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