Patent US3749525A successfully refreshed from Google Patents.
US3749525A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulically operated fluid aggregate pump
Assignee: Individual
•
Filing: 1970-08-03
•
Granted: 1973-07-31
•
Expires: 1990-08-03
Abstract
Abstract A pump for fluid aggregate and the like, characterized by its reciprocating action conductive to substantially continuous delivery of fluid aggregate under pressure. A feature of the invention is the combining therein of a single acting duplex pump with a single acting duplex motor, there being a pair of pistons coupled by means of a tension element that returns one piston upon advance of the other, the two pistons being dependently operable in a pair of cylinders adapted to deliver fluid aggregate into a common manifold. The two cylinder and piston units involve cooperatively related pump sections and motor sections, with the tension element extending between the motor sections. The two motor sections of the two cylinders are alternately charged with hydraulic operating pressure in order to move the pistons therein so as to displace fluid aggregate from the pump sections and through reversely operable valves and into the manifold, there being a valve at the aggregate handling end of each cylinder and said valves being adapted to completely close off or isolate the complementary cylinders, and to alternately isolate a supply of fluid aggregate and the delivery manifold to each cylinder. A feature of the pump is the three positions of the two valves which move oppositely; one, to open its complementary cylinder to the supply of fluid aggregate while the other is closed in this respect and is open to the delivery manifold; two, the reciprocably opposite positions; and three, the simultaneous closing of both valves to the supply of fluid aggregate and to the manifold. Accordingly, the pump and motor combination includes unique controls and hydraulic means to effect the foregoing, and preferably in the form of a selfsustaining system or unit, flexible as to stroke and power application and adaptable to a wide range of fluid aggregate viscosity; that is for example, adapted to pump ''''low slump'''' as well as ''''high slump'''' concrete.
Inventors
- 👤 D Hooper
- 👤 P Putnam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:23
CPC Classifications
F; F04; F04B; F04B1/00; F04B1/02; F04B15/00; F04B15/02; F04B15/023; F04B7/00; F04B7/0003; F04B7/0011; F04B7/0042; F04B7/0046; F04B7/0084; F04B7/0088; Y; Y10; Y10S; Y10S417/00; Y10S417/90
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
261 words
A hydraulically operated fluid material pump comprising, a pair of cylinder and piston units and each having a bore with contiguous pump and motor sections and a piston operable therein, a head closing the bore at the motor section end of each cylinder, reversably operable pump valve means in open communication with the bore at the pump section end of each cylinder, there being a fluid material intake port and a cylinder charging port and a discharge port in and controlled by each of said pump valve means, reversely operable motor valve means in communication with the bore of each cylinder through the head at the motor section, piston return means comprising a flexible element connected to and extending under tension between the two pistons and through seals in the heads at the motor sections to couple the said pistons for return of one piston by forward movement of the other, hydraulic power means supplying fluid under pressure, and means alternately positioning the two pump valve means and motor valve means at the two cylinder and piston units to open said discharge port from said charging port and open the motor valve means from the fluid pressure of the hydraulic means and through one head for forward movement of one piston and simultaneously to open said inlet port to said charging port and open the motor valve means to exhaust for return of and suction intake of material by the other piston, whereby fluid material is alternately delivered from one cylinder and piston unit while being induced to enter the other.
Claim 2
Dependent Claim
261 words
A hydraulically operated fluid material pump comprising, a pair of cylinder and piston units and each having a bore with contiguous pump and motor sections and a piston operable therein, a head closing the bore at the motor section end of each cylinder, reversably operable pump valve means in open communication with the bore at the pump section end of each cylinder, there being a fluid material intake port and a cylinder charging port and a discharge port in and controlled by each of said pump valve means, reversely operable motor valve means in communication with the bore of each cylinder through the head at the motor section, piston return means comprising a flexible element connected to and extending under tension between the two pistons and through seals in the heads at the motor sections to couple the said pistons for return of one piston by forward movement of the other, hydraulic power means supplying fluid under pressure, and means alternately positioning the two pump valve means and motor valve means at the two cylinder and piston units to open said discharge port from said charging port and open the motor valve means from the fluid pressure of the hydraulic means and through one head for forward movement of one piston and simultaneously to open said inlet port to said charging port and open the motor valve means to exhaust for return of and suction intake of material by the other piston, whereby fluid material is alternately delivered from one cylinder and piston unit while being induced to enter the other.
Claim 3
Dependent Claim
31 words
The hydraulically operated fluid material pump as set forth in claim 1 and wherein the piston return means is a flexible wire line connected to and tensioned between the two pistons.
Claim 4
Dependent Claim
44 words
The hydraulically operated fluid material pump as set forth in claim 1, wherein the cylinder and piston units are disposed on separated axes, and wherein alignment means guides the flexible element of the piston return means under tension to connect with the two pistoNs.
Claim 5
Dependent Claim
62 words
The hydraulically operated fluid material pump as set forth in claim 1, wherein the cylinder and piston units are disposed on separated axes, and wherein the flexible element of the piston return means extends under tension over alignment means comprised of at least one wheel from which the said element pays tangentially along said separated axes to connect with the pistons respectively.
Claim 6
Dependent Claim
66 words
The hydraulically operated fluid material pump as set forth in claim 1, wherein the cylinder and piston units are disposed on separated axes, and wherein the flexible element of the piston return means extends under tension over alignment means comprised of a wheel over which said element is warped with opposite live ends paying tangentially along said separated axes to connect with the two pistons respectively.
Claim 7
Dependent Claim
80 words
The hydraulically operated fluid material pump as set forth in claim 1, wherein the cylinder and piston units are disposed on spaced parallel axes, and wherein the flexible element of the piston return means extends under tension over alignment means comprised of a wheel having a diameter equal to the spacing of said parallel axes and over which said element is warped with opposite live ends paying tangentially along said spaced parallel axes to connect with the two pistons respectively.
Claim 8
Dependent Claim
45 words
The hydraulically operated fluid material pump as set forth in claim 1 and wherein the means alternately positioning the two pump valve means and motor valve means is responsive to an element positioned by the piston return means extending under tension between the two pistons.
Claim 9
Dependent Claim
66 words
The hydraulically operated fluid material pump as set forth in claim 1, wherein the cylinder and piston units are disposed on separated axes and alignment means guides the piston return means under tension to connect with the two pistons, and wherein the means alternately positioning the two pump valve means and motor valve means is responsive to an element on and positioned by said alignment means.
Claim 10
Dependent Claim
85 words
The hydraulically operated fluid material pump as set forth in claim 1, wherein the cylinder and piston units are disposed on separated axes, wherein the flexible element of the piston return means extends under tension over alignment means comprised of a wheel from which the said element pays tangentially along said separated axes to connect with the pistons respectively, and wherein the means alternately positioning the two pump valve means and motor valve means is responsive to an element on and positioned by said wheel.
Claim 11
Dependent Claim
120 words
The hydraulically operated fluid material pump as set forth in claim 1 and wherein the means alternately positioning the two pump valve means and motor valve means comprises an axially aligned cylinder pocket in the head and facing the bore closed thereby at the motor section of each cylinder, an axially aligned pilot piston projected by each of the pistons operable in said cylinder bores to enter the cylinder pockets at the ends of alternate return strokes of said pistons respectively, and a cylinder and piston servo in fluid communication with said cylinder pockets and alternately positioning said pump valve means and motor valve means in response to the successive return of one piston by forward movement of the other.
Claim 12
Dependent Claim
269 words
A hydraulically operated fluid material pump comprising, a pair of cylinder and piston units and each having a bore with contiguous pump and motor sections and a piston operable therein, a head closing the bore at the motor section end of each cylinder, reversely operable pump valve means in open communication with the bore at the pump section end of each cylinder, there being a fluid material intake port and a cylinder charging port and a discharge port in and controlled by each of said pump valve means, reversely operable motor valve means in communication with the bore of each cylinder through the head at the motor section, piston return means comprising a flexible element connected to and extending under tension between the two pistons and throuGh seals in the heads at the motor sections to couple the said pistons for return of one piston by forward movement of the other, hydraulic power means supplying fluid under pressure, and actuating means geared to and alternately positioning the two pump valve means and motor valve means at the two cylinder and piston units to open said discharge port from said charging port and open the motor valve means from the fluid pressure of the hydraulic means and through one head for forward movement of one piston and simultaneously to open said inlet port to said charging port and open the motor valve means through the other head to exhaust for return of and suction intake of material by the other piston, whereby fluid material is alternately delivered from one cylinder and piston unit while being induced to enter the other.
Claim 13
Dependent Claim
269 words
A hydraulically operated fluid material pump comprising, a pair of cylinder and piston units and each having a bore with contiguous pump and motor sections and a piston operable therein, a head closing the bore at the motor section end of each cylinder, reversely operable pump valve means in open communication with the bore at the pump section end of each cylinder, there being a fluid material intake port and a cylinder charging port and a discharge port in and controlled by each of said pump valve means, reversely operable motor valve means in communication with the bore of each cylinder through the head at the motor section, piston return means comprising a flexible element connected to and extending under tension between the two pistons and throuGh seals in the heads at the motor sections to couple the said pistons for return of one piston by forward movement of the other, hydraulic power means supplying fluid under pressure, and actuating means geared to and alternately positioning the two pump valve means and motor valve means at the two cylinder and piston units to open said discharge port from said charging port and open the motor valve means from the fluid pressure of the hydraulic means and through one head for forward movement of one piston and simultaneously to open said inlet port to said charging port and open the motor valve means through the other head to exhaust for return of and suction intake of material by the other piston, whereby fluid material is alternately delivered from one cylinder and piston unit while being induced to enter the other.
Claim 14
Dependent Claim
38 words
The hydraulically operated fluid material pump as set forth in claim 11 and wherein the actuating means comprises reversely actuable means operable to reversely position the reversely operable pump valve means at the pump section of each cylinder.
Claim 15
Dependent Claim
38 words
The hydraulically operated fluid material pump as set forth in claim 11 and wherein the actuating means comprises an actuable means operable to reversely position the reversely operable motor valve means at the motor section of each cylinder.
Claim 16
Dependent Claim
60 words
The hydraulically operated fluid material pump as set forth in claim 11 and wherein the actuating valve means comprises reversely actuable means operable to reversely position the reversely operable pump valve means at the pump section of each cylinder, and an actuable means operable to reversely position the reversely operable motor valve means at the motor section of each cylinder.
Claim 17
Dependent Claim
46 words
The hydraulically operated fluid material pump as set forth in claim 11 and wherein the actuating means comprises a reciprocably reversible motor, and reversely actuated means shifted thereby and operable to reversely position the reversely operable pump valve means at the pump section of each cylinder.
Claim 18
Dependent Claim
43 words
The hydraulically operated fluid material pump as set forth in claim 11 and wherein the actuating means comprises a reciprocably reversible motor, and an actuable means operable to reversely position the reversely operable motor valve means at the motor section of each cylinder.
Claim 19
Dependent Claim
64 words
The hydraulically operated fluid material pump as set forth in claim 11 and wherein the actuating means comprises a reciprocably reversible motor, and reversely actuable means operable to reversely position the reversely operable pump valve means at the pump section of each cylinder, and an actuable means operable to reversely position the reversely operable motor valve means at the motor section of each cylinder.
Claim 20
Dependent Claim
147 words
The hydraulically operated fluid material pump as set forth in claim 12, wherein the actuating means comprises a reciprocably reversible cylinder and piston motor geared to and alternately positioning the two pump valve means and motor valve means, an axially aligned cylinder pocket in the head and facing the bore closed thereby at the motor section of each cylinder, an axially aligned pilot piston projected by each of the pistons operable in said cylinder bores to enter the cylinder pockets at the ends of alternate return strokes of said pistons respectively, and a cylinder and piston servo in fluid communication with said cylinder pockets and alternately positioning a reversing valve supplying said power means fluid pressure to and exhausting the same alternately from opposite ends of said reversible cylinder and piston motor in response to the successive return of one piston by forward movement of the other.
Claim 21
Dependent Claim
334 words
A hydraulically operated fluid material pump comprising, a pair of cylinder and piston units and each having a bore with contiguous pump and motor sections and a piston operable therein, a head closing the bore at the motor section end of each cylinder, reversely operable pump valve means in open communication with the bore at the pump section end Of each cylinder, there being a fluid material intake port and a cylinder charging port and a discharge port in and controlled by each of said pump valve means, reversely operable motor valve means in communication with the bore of each cylinder through the head at the motor section, piston return means coupling the said pistons for return of one piston by forward movement of the other, hydraulic power means supplying fluid under pressure, and means alternately positioning the two pump valve means and motor valve means at the two cylinder and piston units and comprising an axially aligned cylinder pocket in the head and facing the bore closed thereby at the motor section of each cylinder, an axially algined pilot piston projected by each of the pistons operable in said cylinder bores to enter the cylinder pockets at the ends of alternate return strokes of said pistons respectively, and a cylinder and piston servo in fluid communication with said cylinder pockets and alternately positioning said pump valve means and motor valve means in response to the successive return of one piston by forward movement of the other, said means being operable to open said discharge port from said charging port and open the motor valve means from the fluid pressure of the hydraulic means and through one head for forward movement of one piston and simultaneously to open said inlet port to said charging port and open the motor valve means to exhaust for return of and suction intake of material by the other piston, whereby fluid material is alternately delivered form one cylinder and piston unit while being induced to enter the other.
Claim 22
Dependent Claim
334 words
A hydraulically operated fluid material pump comprising, a pair of cylinder and piston units and each having a bore with contiguous pump and motor sections and a piston operable therein, a head closing the bore at the motor section end of each cylinder, reversely operable pump valve means in open communication with the bore at the pump section end Of each cylinder, there being a fluid material intake port and a cylinder charging port and a discharge port in and controlled by each of said pump valve means, reversely operable motor valve means in communication with the bore of each cylinder through the head at the motor section, piston return means coupling the said pistons for return of one piston by forward movement of the other, hydraulic power means supplying fluid under pressure, and means alternately positioning the two pump valve means and motor valve means at the two cylinder and piston units and comprising an axially aligned cylinder pocket in the head and facing the bore closed thereby at the motor section of each cylinder, an axially algined pilot piston projected by each of the pistons operable in said cylinder bores to enter the cylinder pockets at the ends of alternate return strokes of said pistons respectively, and a cylinder and piston servo in fluid communication with said cylinder pockets and alternately positioning said pump valve means and motor valve means in response to the successive return of one piston by forward movement of the other, said means being operable to open said discharge port from said charging port and open the motor valve means from the fluid pressure of the hydraulic means and through one head for forward movement of one piston and simultaneously to open said inlet port to said charging port and open the motor valve means to exhaust for return of and suction intake of material by the other piston, whereby fluid material is alternately delivered form one cylinder and piston unit while being induced to enter the other.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |