US4230019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid arrangement
Assignee: Individual
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Filing: 1978-11-13
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Granted: 1980-10-28
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Expires: 1998-11-13
Abstract
Abstract A fluid arrangement for the alternating operation of an apparatus includes a working cylinder with a working piston endowed with an alternating movement and a control cylinder with an alternatingly moving control piston. Each of the cylinders has for the respective piston a driving chamber which is alternately connected to a supply source of fluid under pressure and to a discharge opening for the fluid through a distributor, and a return chamber permanently connected to the supply source of fluid under pressure. The distributor connected to the driving chamber in the working cylinder is the control cylinder, and the distributor connected to the driving chamber in the control cylinder is the working chamber.
Inventors
- 👤 Luis M. Castejon Castan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:57
CPC Classifications
B; B25; B25D; B25D9/00; B25D9/14; B25D9/145; B25D9/26; B25D9/265; F; F01; F01L; F01L25/00; F01L25/02; F01L25/04; F01L25/06; F01L25/066
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
357 words
A fluid actuating apparatus of the type including a fluid circuit and a plurality of actuating members which have imparted thereto alternating movement governed by said fluid circuit, said apparatus comprising: a working cylinder; a working piston mounted for movement in opposite first and second directions within said working cylinder; a control cylinder; a control piston mounted for movement in opposite first and second directions within said control cylinder; a fluid feeding line for a source of fluid under pressure permanently connected to a return chamber in said working cylinder and to a first chamber in said control cylinder; a working chamber in said working cylinder permanently connected to a second chamber in said control cylinder; a fluid discharge line for discharging fluid permanently connected to a discharge chamber in said working cylinder and to a third chamber in said control cylinder; a control chamber in said working cylinder permanently connected to a fourth chamber in said control cylinder; and said working piston and said control piston each including means cooperating with said working cylinder and said control cylinder, respectively, for opening and closing communication between selected ones of said chambers in said working cylinder and said control cylinder, such that in an initial stage of the cycle of operation of the apparatus said working piston is in a first position thereof adapted to contact a percussion tool and said control piston is in a first position thereof whereat said second and third chambers thereof are in communication, thereby permitting driving of said working piston to a second position thereof spaced from the percussion tool, at which second position of said working piston said return chamber and said control chamber are in communication, thereby causing driving of said control piston to a second position thereof at which said first and second chambers are in communication, thereby causing said working piston to be moved toward said first position thereof to strike the percussion tool, at which first position said control chamber and said discharge chamber are in communication, thereby permitting said control piston to be moved to said first position thereof, whereat the cycle of operation starts anew.
Claim 2
Dependent Claim
357 words
A fluid actuating apparatus of the type including a fluid circuit and a plurality of actuating members which have imparted thereto alternating movement governed by said fluid circuit, said apparatus comprising: a working cylinder; a working piston mounted for movement in opposite first and second directions within said working cylinder; a control cylinder; a control piston mounted for movement in opposite first and second directions within said control cylinder; a fluid feeding line for a source of fluid under pressure permanently connected to a return chamber in said working cylinder and to a first chamber in said control cylinder; a working chamber in said working cylinder permanently connected to a second chamber in said control cylinder; a fluid discharge line for discharging fluid permanently connected to a discharge chamber in said working cylinder and to a third chamber in said control cylinder; a control chamber in said working cylinder permanently connected to a fourth chamber in said control cylinder; and said working piston and said control piston each including means cooperating with said working cylinder and said control cylinder, respectively, for opening and closing communication between selected ones of said chambers in said working cylinder and said control cylinder, such that in an initial stage of the cycle of operation of the apparatus said working piston is in a first position thereof adapted to contact a percussion tool and said control piston is in a first position thereof whereat said second and third chambers thereof are in communication, thereby permitting driving of said working piston to a second position thereof spaced from the percussion tool, at which second position of said working piston said return chamber and said control chamber are in communication, thereby causing driving of said control piston to a second position thereof at which said first and second chambers are in communication, thereby causing said working piston to be moved toward said first position thereof to strike the percussion tool, at which first position said control chamber and said discharge chamber are in communication, thereby permitting said control piston to be moved to said first position thereof, whereat the cycle of operation starts anew.
Claim 3
Dependent Claim
69 words
An apparatus as claimed in claim 1, wherein said working piston and said driving chamber are provided with means which cooperate to damp the movement of said working piston at the end of the stroke thereof toward said first position thereof when the percussion tool is not set on material to be worked and thus is out of the range of positions to be struck by said working piston.
Claim 4
Dependent Claim
68 words
An apparatus as claimed in claim 1, further comprising means for connecting said return chamber to said driving chamber when said working piston is connected to said fluid discharge line, to prevent the start of a new cycle of operation when the percussion tool is not set on material to be worked and thus is out of the range of positions to be struck by said working piston.
Claim 5
Dependent Claim
73 words
An apparatus as claimed in claim 3, wherein said connecting means comprises a passageway which extends from a surface of said working piston on which acts fluid under pressure in said driving chamber to a point on the side surface of said working piston located at a position such that, if the stroke of said working piston were to be extended toward the percussion tool, said point would be within said return chamber.
Claim 6
Dependent Claim
57 words
An apparatus as claimed in claim 1, wherein said fluid feeding line is connected to a tank containing fluid under pressure, and said fluid discharge line discharges return fluid to said tank, thereby forming a closed circuit, and further comprising a branch passage from said fluid feeding line extending to an accumulator for accumulating fluid under pressure.
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) | 1983-10-28 | 1984-04-28 | 1984-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-28 | 1988-04-28 | 1988-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-28 | 1992-04-28 | 1992-10-28 | $7700.00 | Window Closed / Lapsed |