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US4039269A Expired / Lapsed US ⏱️ 0.0 years remaining

Flexible tube pump having linear cam actuation of distributor means

Assignee: HIGH STOY TECHNOLOGICAL CORP
•
Filing: 1976-01-19
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Granted: 1977-08-02
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Expires: 1996-01-19
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Abstract

Abstract A precision metering and dispensing pump of the peristaltic type is disclosed. The pump includes a housing in which an elongated, compressible fluid extruding tube is disposed. The tube has an outlet that is adapted to be connected to the source of fluid that is to be pumped. Spaced serially along the tube and in opposition thereto are an inlet plunger, an extruder plunger and an outlet plunger all of which constitute valves and which are arranged to be displaced in such a manner as to apply compressive forces to the tube. A linear actuator is mounted on the housing and is coupled to a primary, two-part cam that is arranged to linearly displace the inlet and the outlet plungers at preselected times. Displacement of the primary cam causes the displacement of a secondary cam to the movement of which is responsive the extruder plunger. The primary cam acts on the outlet plunger which, at the beginning of the cycle is extended so as to close the tube. Fluid will flow into the tube up to the point where the outlet plunger has sealed the tube. Further movement of the primary cam will cause the inlet plunger to close the tube so that the fluid to be pumped is trapped between the inlet plunger and outlet plunger. Still further movement of the primary cam in the same direction will cause the secondary cam to move and thereby displace the extruder plunger while at the same time retracting the outlet plunger so that the fluid passage to the outlet is opened thereby completing the cycle after which the actuator is reversed and the cycle is repeated.

Inventors

  • 👤 Norman C. Pickering

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-26 15:34
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/08; F04B43/082

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 243 words
A peristaltic-type metering pump comprising: a. a housing; b. elongated tubing means supported in said housing, said tubing means including an inlet end adapted to be connected to a source of fluid to be pumped and an outlet end; c. an inlet plunger, an extruder plunger and an outlet plunger arranged serially in said housing in opposition to and along the length of said tubing means in said housing, said inlet, extruder, and outlet plungers being further arranged to be displaced and to thereby apply compressive forces to said tubing means; d. a linear actuator; e. primary cam means slidably mounted in said housing and responsive to said linear actuator for displacing said inlet and said outlet plungers in a predetermined timed relationship with respect to each other to thereby apply said forces to said tubing means, said primary cam means being comprised of first and second axially spaced apart sections; and f. secondary cam means located between said first and second sections responsive to the movement of said first cam means for displacing said extruder plunger in a predetermined time relationship with respect to the displacement of said inlet and outlet plungers, said secondary cam means being slidably mounted on said primary cam means and arranged to be displaced in one axial direction by a portion of one of said primary cam means sections and to be displaced in the opposite axial direction by the other of said primary cam means sections.
Claim 2
Dependent Claim 243 words
A peristaltic-type metering pump comprising: a. a housing; b. elongated tubing means supported in said housing, said tubing means including an inlet end adapted to be connected to a source of fluid to be pumped and an outlet end; c. an inlet plunger, an extruder plunger and an outlet plunger arranged serially in said housing in opposition to and along the length of said tubing means in said housing, said inlet, extruder, and outlet plungers being further arranged to be displaced and to thereby apply compressive forces to said tubing means; d. a linear actuator; e. primary cam means slidably mounted in said housing and responsive to said linear actuator for displacing said inlet and said outlet plungers in a predetermined timed relationship with respect to each other to thereby apply said forces to said tubing means, said primary cam means being comprised of first and second axially spaced apart sections; and f. secondary cam means located between said first and second sections responsive to the movement of said first cam means for displacing said extruder plunger in a predetermined time relationship with respect to the displacement of said inlet and outlet plungers, said secondary cam means being slidably mounted on said primary cam means and arranged to be displaced in one axial direction by a portion of one of said primary cam means sections and to be displaced in the opposite axial direction by the other of said primary cam means sections.
Claim 3
Dependent Claim 62 words
The pump according to claim 1 wherein said primary cam means sections each include a pair of parallel cam surfaces that are spaced apart in the direction of movement of said inlet and outlet plungers with said cam surfaces of each said primary cam means sections being connected by an intermediate cam surface, said intermediate cam surfaces being inclined in opposite directions.
Claim 4
Dependent Claim 71 words
The pump according to claim 2 wherein said secondary cam means includes a pair of parallel cam surfaces that are spaced apart in the direction of movement of said extruder plunger with said cam surfaces of said secondary cam means being connected by an intermediate cam surface that is inclined in the same direction as said inclined intermediate cam surface of said primary cam means section that displaces said inlet plunger.
Claim 5
Dependent Claim 31 words
The pump according to claim 2 wherein said inlet and outlet plungers each includes cam follower means arranged to successively engage said cam surfaces of said respective primary cam means sections.
Claim 6
Dependent Claim 26 words
The pump according to claim 3 wherein said extruder plunger includes cam follower means arranged to successively engage said cam surfaces of said secondary cam means.

References Cited (Backward Citations)

US1871692A Cited
US2308974A Cited
US2412397A Cited
US2922379A Cited
US2877714A Cited
US3128716A Cited
US3171360A Cited
US3314371A Cited
US3595134A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1980-08-01 1981-01-31 1981-08-02 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1984-08-01 1985-01-31 1985-08-02 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1988-08-01 1989-01-31 1989-08-02 $7700.00 Window Closed / Lapsed

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