US3579985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure intensifier
Assignee: Individual
•
Filing: 1969-04-25
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Granted: 1971-05-25
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Expires: 1989-04-25
Abstract
Abstract This disclosure relates to a hydraulic system incorporating a pressure intensifier which is a combination motor and pump and wherein the pressure intensifier has two discharge sources, one discharge source being a free discharge to a reservoir and the other discharge source being a high pressure discharge to a motor, the pressure intensifier being of the piston and cylinder type with the pistons being freely mounted within the cylinders and being associated with a cam so as to provide the required motor and pumping action.
Inventors
- 👤 George M Barrett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:29
CPC Classifications
F; F15; F15B; F15B3/00; F01; F01B; F01B13/00; F01B13/04; F01B13/06; F01B13/061; F01B13/063; F01B13/065
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
171 words
A pressure intensifier for a hydraulic system comprising a housing, a tubular rotor rotatably journaled in said housing, said housing having a cam disposed coaxially and coextensive with said rotor, a plurality of radiating cylinders extending entirely through said rotor and opening towards both a fixed part of said housing and said cam, a free piston in each cylinder projecting from said rotor and riding on said cam, inlet port means in said housing fixed part for supplying a motivating fluid under pressure to all of said cylinders in timed sequence, and discharge port means in said housing for receiving said motivating fluid during return strokes of said pistons, said discharge port means including a first passage for receiving a portion of the returning motivating fluid at a reduced pressure and a second passage for receiving the remainder of the returning motivating fluid at an increased pressure with certain of said pistons functioning as pressure pumping elements during return strokes thereof, all of said cylinders being arranged in a single row.
Claim 2
Dependent Claim
171 words
A pressure intensifier for a hydraulic system comprising a housing, a tubular rotor rotatably journaled in said housing, said housing having a cam disposed coaxially and coextensive with said rotor, a plurality of radiating cylinders extending entirely through said rotor and opening towards both a fixed part of said housing and said cam, a free piston in each cylinder projecting from said rotor and riding on said cam, inlet port means in said housing fixed part for supplying a motivating fluid under pressure to all of said cylinders in timed sequence, and discharge port means in said housing for receiving said motivating fluid during return strokes of said pistons, said discharge port means including a first passage for receiving a portion of the returning motivating fluid at a reduced pressure and a second passage for receiving the remainder of the returning motivating fluid at an increased pressure with certain of said pistons functioning as pressure pumping elements during return strokes thereof, all of said cylinders being arranged in a single row.
Claim 3
Dependent Claim
32 words
The pressure intensifier of claim 1 wherein said cam is a multiple lobe cam and said first and second passages are circumferentially spaced and in serial communication with all of said cylinders.
Claim 4
Dependent Claim
317 words
A hydraulic system comprising a reservoir, a pump, a pressure intensifier and a motor, said pressure intensifier including a housing, a tubular rotor rotatably journaled in said housing, said housing having a cam disposed coaxially and coextensive with said rotor, a plurality of radiating cylinders extending entirely through said rotor and opening towards both a fixed part of said housing and said cam, a free piston in each cylinder projecting from said rotor and riding on said cam, inlet port means in said housing fixed part for supplying a motivating fluid under pressure to all of said cylinders in timed sequence, discharge port means in said housing for receiving said motivating fluid during return strokes of said pistons, said discharge part means including a first passage for receiving a portion of the returning motivating fluid at a reduced pressure and a second passage for receiving the remainder of the returning motivating fluid at an increased pressure with certain of said pistons functioning as pressure pumping elements during return strokes thereof, all of said cylinders being arranged in a single row, said cylinders being arranged in axially spaced rows with said second passage being in serial communication with all of the cylinders of only certain of said rows and said first passage being in serial communication with all of the cylinders of the others of sAid rows, said pump being in communication with said reservoir and said inlet port means for supplying fluid under pressure to said inlet port means, said first passage being in direct communication with said reservoir with there being minimum back pressure on all of said pistons of said cylinders of the others of said rows, said second passage being in a communication with said motor for delivering fluid thereto at a greater pressure than that of the fluid supplied by said pump to said pressure intensifier, and said motor exhausting to said reservoir.
Claim 5
Dependent Claim
317 words
A hydraulic system comprising a reservoir, a pump, a pressure intensifier and a motor, said pressure intensifier including a housing, a tubular rotor rotatably journaled in said housing, said housing having a cam disposed coaxially and coextensive with said rotor, a plurality of radiating cylinders extending entirely through said rotor and opening towards both a fixed part of said housing and said cam, a free piston in each cylinder projecting from said rotor and riding on said cam, inlet port means in said housing fixed part for supplying a motivating fluid under pressure to all of said cylinders in timed sequence, discharge port means in said housing for receiving said motivating fluid during return strokes of said pistons, said discharge part means including a first passage for receiving a portion of the returning motivating fluid at a reduced pressure and a second passage for receiving the remainder of the returning motivating fluid at an increased pressure with certain of said pistons functioning as pressure pumping elements during return strokes thereof, all of said cylinders being arranged in a single row, said cylinders being arranged in axially spaced rows with said second passage being in serial communication with all of the cylinders of only certain of said rows and said first passage being in serial communication with all of the cylinders of the others of sAid rows, said pump being in communication with said reservoir and said inlet port means for supplying fluid under pressure to said inlet port means, said first passage being in direct communication with said reservoir with there being minimum back pressure on all of said pistons of said cylinders of the others of said rows, said second passage being in a communication with said motor for delivering fluid thereto at a greater pressure than that of the fluid supplied by said pump to said pressure intensifier, and said motor exhausting to said reservoir.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |