EP0156546A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Earth-working machine
Assignee: Hikoma Seisakusho Co Ltd
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Filing: 1985-03-05
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Granted: —
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Expires: 2005-03-05
Abstract
Abstract A turntable (14) is rotatably mounted on a mobile chassis (10). A carriage (20) is rotatably mounted on the turntable (14) in eccentric relation thereto, and an earth-working mechanism (27-32) is mounted on the carriage (20). First and second fluid motors (18; 42) rotate the turntable and carriage, respectively. A fluid rate synchroniser (57) composed of third and fourth interconnected fluid motors (58, 59) discharges fluid under pressure at a predetermined ratio from a source of third to the first and second fluid motors (18, 42). The turntable (14) and the carriage (20) can thus be angularly moved about their own axes at a constant angular displacement ratio.
Inventors
- 👤 Mitsuhiro Kishi
- 👤 Yokichi Nagasawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 20:28
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/16; F15B11/22; E; E02; E02F; E02F9/00; E02F9/08; E02F9/10; E02F9/12; E02F9/121; E02F9/123
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
135 words
An earth-working machine comprising: a mobile chassis (10); a turntable (14) rotatably mounted on the mobile chassis (10); a carriage (20) rotatably mounted on the turntable (14) in eccentric relation thereto; an earth-working mechanism (27 - 32) mounted on the carriage (20); a source (51 - 53) of fluid pressure; first and second fluid motors (18; 42) for rotating the turntable (14) and the carriage (20), respectively; and characterised by a fluid rate synchroniser (57) composed of third and fourth interconnected fluid motors (58, 59) for discharging amounts of fluid under pressure at a predetermined ratio from the source of fluid (51 - 53) to the first and second fluid motors (18, 42), whereby the turntable (14) and the carriage (20) can be angularly moved about their own axes at a constant angular displacement ratio.
Claim 2
Dependent Claim
135 words
An earth-working machine comprising: a mobile chassis (10); a turntable (14) rotatably mounted on the mobile chassis (10); a carriage (20) rotatably mounted on the turntable (14) in eccentric relation thereto; an earth-working mechanism (27 - 32) mounted on the carriage (20); a source (51 - 53) of fluid pressure; first and second fluid motors (18; 42) for rotating the turntable (14) and the carriage (20), respectively; and characterised by a fluid rate synchroniser (57) composed of third and fourth interconnected fluid motors (58, 59) for discharging amounts of fluid under pressure at a predetermined ratio from the source of fluid (51 - 53) to the first and second fluid motors (18, 42), whereby the turntable (14) and the carriage (20) can be angularly moved about their own axes at a constant angular displacement ratio.
Claim 3
Dependent Claim
44 words
An earth-working machine according to claim 1, including first and second normally closed solenoid-operated valves (61, 62) connected across the third and fourth fluid motors (58, 59), respectively, for providing bypass passages respectively across the third and fourth fluid motors (58, 59) when actuated.
Claim 4
Dependent Claim
107 words
An earth-working machine according to claim 2, including first and second normally open solenoid-operated valves (79, 80) the first normally open solenoid-operated valve being operatively connected between the first and third fluid motors (18, 58), the second normally open solenoid-operated valve being operatively connected between the second and fourth fluid motors (42, 60) and an electrical control circuit (Figure 16) including a first switch (82) for simultaneously actuating the first normally closed solenoid-operated valve (61) and the second normally open solenoid-operated valve (80), and a second switch (83) for simultaneously actuating the second normally closed solenoid-operated valve (62) and the first normally open solenoid-operated valve (79). -
Claim 5
Dependent Claim
146 words
An earth-working machine according to claim 3, wherein the electric control circuit (Figure 12) includes a first position detector (45, 46) for detecting a first angular position of the turntable (14) with respect to the mobile chassis (10), and a second position detector (18, 49) for detecting a second angular position of the carriage (20) with respect to said turntable (14), the first position detector (46) including a third switch (89) connected parallel to the first switch (82) for simultaneously actuating the first normally closed solenoid-operated valve (61) and the second normally open solenoid-operated valve (80) when the first angular position is detected, and second position detector (49) including a fourth switch (91) connected in parallel to the second switch (83) for simultaneously actuating the second normally closed solenoid-operated valve (62) and said first normally open solenoid-operated valve (79) when the second angular position is detected.
References Cited (Backward Citations)
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