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US 4,375,942 AGranted
Tilting cam, rotating barrel pump
AssigneeDynes/Rivett Inc.
InventorJohn R. Olson
Life of this patent
Estimating the term…
Abstract
Disclosed is a pump comprising a rotatable barrel, a tiltable pump cam, and a proportional servo actuator operatively connected to the pump cam to affect the angle between the pump cam and the axis of the barrel.
Claims66
A proportional servo actuator comprising:
- (a) a body containing a first bore;
- (b) a sleeve containing a second bore slidably positioned in said first bore;
- (c) a spool slidably positioned in said second bore;
- (d) first means for biasing said sleeve in a first direction in said first bore;
- (e) second means for biasing said spool in a second direction, opposite to the first direction, in said second bore;
- (f) third means for moving said spool in the first direction against the bias of said second means;
- and
- (g) fourth means for moving said sleeve in the second direction against the bias of said first means, said fourth means comprising:
- (i) a control cam which
- (A) has a cam surface positioned to contact said sleeve and
- (B) is mounted for pivotal movement about a pivotal axis perpendicular to the direction of motion of said sleeve;
- (ii) fifth means for biasing said control cam in a first angular direction about its pivotal axis;
- and
- (iii) sixth means for moving said control cam in a second angular direction, opposite to said first angular direction, about its pivotal axis,
- whereby operation of said sixth means adjusts the motion of said sleeve in said first bore.
12 more elements
In a proportional servo actuator comprising:
- (a) a body containing a first bore;
- (b) a sleeve containing a second bore slidably positioned in said first bore;
- (c) a spool slidably positioned in said second bore;
- (d) first means for biasing said sleeve in a first direction in said first bore;
- (e) second means for biasing said spool in a second direction, opposite to the first direction, in said second bore;
- (f) third means for moving said spool in the first direction against the bias of said second means;
- and
- (g) fourth means for moving said sleeve in the second direction against the bias of said first means,
- the improvement wherein said fourth means comprises:
- (h) a control cam which
- (i) has a cam surface positioned to contact said sleeve and
- (ii) is mounted for pivotal movement about a pivotal axis perpendicular to the direction of motion of said sleeve;
- (i) fifth means for biasing said control cam in a first angular direction about its pivotal axis;
- and
- (j) sixth means for moving said control cam in a second angular direction, opposite to said first angular direction, about its pivotal axis,
- whereby operation of said sixth means changes the relationship between the translational movement of said control cam and the motion of said sleeve in said first bore.
13 more elements
A proportional servo actuator comprising:
- (a) a body containing a first bore;
- (b) a sleeve containing a second bore slidably positioned in said first bore;
- (c) a spool slidably positioned in said second bore;
- (d) first means for biasing said sleeve in a first direction in said first bore;
- (e) second means for biasing said spool in a second direction, opposite to the first direction, in said second bore;
- (f) third means for moving said spool in the first direction against the bias of said second means;
- (g) fourth means for moving said sleeve in the second direction against the bias of said first means;
- (h) a piston slidably received in a fourth bore;
- (i) seventh means for supplying control pressure which is a function of the position of said spool in said sleeve to one face of said piston, thereby affecting the position of said piston in said fourth bore;
- and
- (j) a relief valve located in a fifth bore leading through said piston,
- whereby control pressure is vented through said fifth bore to tank when it exceeds a preset valve.
9 more elements
In a proportional servo actuator comprising:
- (a) a body containing a first bore;
- (b) a sleeve containing a second bore slidably positioned in said first bore;
- (c) a spool slidably positioned in said second bore;
- (d) first means for biasing said sleeve in a first direction in said first bore;
- (e) second means for biasing said spool in a second direction, opposite to the first direction, in said second bore;
- (f) third means for moving said spool in the first direction against the bias of said second means;
- (g) fourth means for moving said sleeve in the second direction against the bias of said first means;
- (h) a piston slidably received in a fourth bore;
- and
- (i) seventh means for supplying control pressure which is a function of the position of said spool in said sleeve to one face of said piston, thereby affecting the position of said piston in said fourth bore,
- the improvement comprising:
- (j) a relief valve located in a fifth bore leading through said piston, whereby control pressure is vented through said fifth bore to tank when it exceeds a preset valve.
9 more elements
A tilting cam, rotating barrel pump comprising:
- (a) a rotatable barrel containing pumping pistons;
- (b) a tiltable pump can operatively connected to said rotatable barrel such that
- (i) when said pump cam is perpendicular to the axis of said barrel, said pumping pistons are not displaced axially and no fluid is pumped and
- (ii) the more said pump cam is tilted relative to the axis of said barrel, the more the pumping pistons are displaced axially and the more fluid is pumped;
- and
- (c) a proportional servo actuator operatively connected to said pump cam to affect the angle between said pump cam and the axis of said barrel, said proportional servo actuator comprising:
- (i) a body containing a first bore;
- (ii) a sleeve containing a second bore slidably positioned in said first bore;
- (iii) a spool slidably positioned in said second bore;
- (iv) first means for biasing said sleeve in a first direction in said first bore;
- (v) second means for biasing said spool in a second direction, opposite to the first direction, in said second bore;
- (vi) third means for moving said spool in the first direction against the bias of said second means;
- and
- (vii) fourth means for moving said sleeve in the second direction against the bias of said first means, said fourth means comprising:
- [A] a cam which has a cam surface positioned to contact said sleeve and is mounted for pivotal movement about a pivotal axis perpendicular to the direction of motion of said sleeve;
- [B] fifth means for biasing said control cam in a first angular direction about its pivotal axis;
- and
- [C] sixth means for moving said control cam in a second angular direction, opposite to said first angular direction, about its pivotal axis,
- whereby operation of said sixth means changes the relationship between the translational movement of said control cam and the motion of said sleeve in said first bore.
16 more elements
In a tilting cam, rotating barrel pump comprising:
- (a) a rotatable barrel containing pumping pistons;
- (b) a tiltable pump cam operatively connected to said rotatable barrel such that
- (i) when said pump cam is perpendicular to the axis of said barrel, said pumping pistons are not displaced axially and no fluid is pump and
- (ii) the more said pump cam is tilted relative to the axis of said barrel, the more the pumping pistons are displaced axially and the more fluid is pumped;
- and
- (c) a proportional servo actuator operatively connected to said pump cam to affect the angle between said pump cam and the axis of said barrel, said proportional servo actuator comprising:
- (i) a body containing a first bore;
- (ii) a sleeve containing a second bore slidably positioned in said first bore;
- (iii) a spool slidably positioned in said second bore;
- (iv) first means for biasing said sleeve in a first direction in said first bore;
- (v) second means for biasing said spool in a second direction, opposite to the first direction, in said second bore;
- (vi) third means for moving said spool in the first direction against the bias of said second means;
- and
- (vii) fourth means for moving said sleeve in the second direction against the bias of said first means,
- the improvement wherein said fourth means comprises:
- (h) a control cam which
- (i) has a cam surface positioned to contact said sleeve and
- (ii) is mounted for pivotal movement about a pivotal axis perpendicular to the director of motion of said sleeve;
- (e) fifth means for biasing said control cam in a first angular direction about its pivotal axis;
- and
- (f) sixth means for moving said control cam in a second angular direction, opposite to said first angular direction, about its pivotal axis,
- whereby operation of said sixth means changes the relationship between the translational movement of said control cam and the motion of said sleeve in said first bore.
19 more elements
A tilting cam, rotating barrel pump comprising:
- (a) a rotatable barrel containing pumping pistons;
- (b) a tiltable pump cam operatively connected to said rotatable barrel such that
- (i) when said pump cam is perpendicular to the axis of said barrel, said pumping pistons are not displaced axially and no fluid is pumped and
- (ii) the more said pump cam is tilted relative to the axis of said barrel, the more the pumping pistons are displayed axially and the more fluid is pumped;
- and
- (c) a proportional servo actuator operatively connected to said pump cam to affect the angle between said pump cam and the axis of said barrel, said proportional servo actuator comprising:
- (i) a body comprising a first bore;
- (ii) a sleeve containing a second bore slidably positioned in said first bore;
- (iii) a spool slidably positioned in said second bore;
- (iv) first means for biasing said sleeve in a first direction in said first bore;
- (v) second means for biasing said spool in a second direction, opposite to the first direction, in said second bore;
- (vi) third means for moving said spool in the first direction against the bias of said second means;
- and
- (vii) fourth means for moving said sleeve in the second direction against the bias of said first means;
- (viii) a piston slidably received in a fourth bore;
- (ix) seventh means for supplying control pressure which is a function of the position of said spool in said sleeve to one face of said piston, thereby affecting the position of said piston in said fourth bore;
- and
- (x) a relief valve located in a fifth bore leading through said piston,
- whereby control pressure is vented through said fifth bore to tank when it exceeds a preset valve.
16 more elements
In a tilting cam, rotating barrel pump comprising:
- (a) a rotatable barrel containing pumping pistons;
- (b) a tiltable pump cam operatively connected to said rotatable barrel such that
- (i) when said pump cam is perpendicular to the axis of said barrel, said pumping pistons are not displaced axially and no fluid is pumped and
- (ii) the more said pump cam is tilted relative to the axis of said barrel, the more the pumping pistons are displaced axially and the more fluid is pumped;
- and
- (c) a proportional servo actuator operatively connected to said pump cam to affect the angle between said pump cam and the axis of said barrel, said proportional servo actuator comprising:
- (i) a body containing a first bore;
- (ii) a sleeve containing a second bore slidably positioned in said first bore;
- (iii) a spool slidably positioned in said second bore;
- (iv) first means for biasing said sleeve in a first direction in said first bore;
- (v) second means for biasing said spool in a second direction, opposite to the first direction, in said second bore;
- (vi) third means for moving said spool in the first direction against the bias of said second means;
- and
- (vii) fourth means for moving said sleeve in the second direction against the bias of said first means;
- (viii) a piston slidably received in a fourth bore;
- and
- (ix) seventh means for supplying control pressure which is a function of the position of said spool in said sleeve to one face of said piston, thereby affecting the position of said piston in said fourth bore,
- the improvement comprising a relief valve located in a fifth bore leading through said piston, whereby control pressure is vented through said fifth bore to tank when it exceeds a preset value.
15 more elements
Dependencies are inferred from the claim text.