Pumps – Condition responsive control of drive transmission or pump... – Plural pumps with individual or relative control
Patent
1998-11-13
2000-12-19
Wolfe, Willis R.
Pumps
Condition responsive control of drive transmission or pump...
Plural pumps with individual or relative control
417218, 417429, F04B 4106, F04B 4912
Patent
active
061620238
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to improvements in pumping. The present invention is used to provide a pump driving and controlling system that can be used to create flows of multiple fluids at high or low pressures.
BACKGROUND ART
No apparatus performing the function of the present invention is known.
DISCLOSURE OF INVENTION
The present invention consists of a multi-pump controlling means comprising: driving means adapted to reciprocate said cam system in a first plane; mutually reciprocate in a second plane not lying in or parallel to said first plane; being fixed to reciprocate with the reciprocation of the associated piston or pump body, said cam followers also being adapted to follow the path determined by said cam follower's respective cam upon reciprocation of the cam system; the reciprocating motion of the cam system drives the pump by causing relative movement between each cam and its respective cam follower and thus causing relative movement between the said cam follower and its respective associated piston or pump body, and their corresponding pump body or piston.
BRIEF DESCRIPTION OF DRAWINGS
One preferred form of the invention will now be described with reference to the accompanying drawings in which:
FIG. 1 shows a schematic side elevation of the dual-pump controlling means with parts of the supporting structure cut away for clarity;
FIG. 2 shows a schematic plan view of a preferred form of a dual-pump controlling means; and
FIG. 3 shows a schematic perspective view of the dual-pump controlling means with the supporting structure cut away for clarity but the position of part of the guide means being shown by dashed lines.
FIG. 4 shows a preferred form of a connecting arm in side view.
FIG. 5 shows the same preferred form of a connecting arm in plan view.
FIG. 6 shows the preferred form of a connecting arm as it interacts with the cam system and pumps.
MODES FOR CARRYING OUT THE INVENTION
In the preferred form of the invention as shown in FIG. 3, pumps (41, 42) are driven by a driving means (not shown apart from part of the rigid driving rod (2) via cams (30, 31).
FIGS. 1, 2 and 3 show a dual-pump controlling system involving the use of cams (30, 31). One of the cams (31) may be adjusted to various gradients. When the cams (30, 31) are reciprocated by the driving means, in a first plane (in a direction marked by arrow A) substantially normal to a second plane (in a direction marked by arrow B) in which pump pistons (43, 44) are adapted to reciprocate, the cams (30, 31), by interaction with cam followers (34, 35), elevate and depress the pistons (43, 44). The gradients of the cams (30, 31) regulate the extent to which the pistons (43, 44) are elevated and thus the stroke lengths of the pumps (41, 42). By setting the adjustable cam (31) to different gradients the stroke length and thus the intake volume of the associated pump (41) can be altered. Use of the appropriate ratios of stroke lengths allows control of the volumetric intake ratio of the pumps (41, 42) and thus the subsequent volumetric output ratio.
The preferred form of the invention shown in FIGS. 1, 2 and 3 is a dual-pump controlling means with two pumps (41, 42), two cam followers (34, 35), and a cam system including two cams (30, 31).
Other forms of the invention may include more than two pumps and a corresponding number of cams and cam followers.
In the preferred form the pumps (41, 42) are aligned in a direction normal to the direction indicated by arrow A. In other forms the pumps may not be so aligned.
The driving means is adapted to reciprocate the cam system in a first direction indicated by arrow A lying in a first plane, substantially normal to a second plane in which the pistons (43, 44) are adapted to reciprocate (in a direction indicated by arrow B) in relation to the pump bodies (49, 50) fixed to a supporting structure (1).
Other forms of the invention could have the reciprocation planes at angles other than ninety degrees provided the planes were not parallel. Furthermore, in other forms it may be t
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