US3744652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic hoisting apparatus for use with a road vehicle
Assignee: HAAMANN JOSEF AND FREUDENBERGE
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Filing: 1972-03-29
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Granted: 1973-07-10
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Expires: 1992-03-29
Abstract
Abstract A hydraulic hoisting apparatus for a gantry vehicle with hydraulic motor means for propelling the vehicle and with front and rear hoisting devices. Either the hoisting devices or the motor means are selectively driven by two flows of a fluid medium discharged from two outlets of a motor driven main pump, and flowing first through two control valves, and then through two hoist valves, respectively. The hoist valves control direction and speed of the hoisting devices, and the control valves direct the two flows either to the hydraulic propelling motor means of the vehicle or to the hoist valves.
Inventors
- 👤 H Rieschel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:18
CPC Classifications
B; B66; B66C; B66C19/00; B66C19/007
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
201 words
Hydraulic hoisting apparatus for use with a road vehicle, comprising, in combination, motor driven pump means having a plurality of pump outlets, a pump inlet, and a reservoir to which said pump inlet is connected; hydraulic motor means for propelling the vehicle; a plurality of control valves having control valve inlets connected with said pump outlets, respectively, first control valve outlets connectable with said hydraulic motor means, and second control valve outlets; a hydraulic hoisting means mounted on the vehicle, at least one hoist valve for controlling lifting and lowering movements of said hydraulic hoisting means, and having a hoist valve inlet communicating with sAid second control valve outlet of one said control valve, a first hoist valve outlet connected with said hoisting means, and a second hoist valve outlet for discharge into said reservoir; and means for actuating said control valve to connect said control valve inlets with said second control valve outlets, respectively, for operating said hoisting means, or to connect said first control valve outlets with said hydraulic motor means while actuating said hoist valve to connect said hoist valve inlet with said second hoist valve outlet so that said hydraulic motor is operated to propel the vehicle.
Claim 2
Dependent Claim
201 words
Hydraulic hoisting apparatus for use with a road vehicle, comprising, in combination, motor driven pump means having a plurality of pump outlets, a pump inlet, and a reservoir to which said pump inlet is connected; hydraulic motor means for propelling the vehicle; a plurality of control valves having control valve inlets connected with said pump outlets, respectively, first control valve outlets connectable with said hydraulic motor means, and second control valve outlets; a hydraulic hoisting means mounted on the vehicle, at least one hoist valve for controlling lifting and lowering movements of said hydraulic hoisting means, and having a hoist valve inlet communicating with sAid second control valve outlet of one said control valve, a first hoist valve outlet connected with said hoisting means, and a second hoist valve outlet for discharge into said reservoir; and means for actuating said control valve to connect said control valve inlets with said second control valve outlets, respectively, for operating said hoisting means, or to connect said first control valve outlets with said hydraulic motor means while actuating said hoist valve to connect said hoist valve inlet with said second hoist valve outlet so that said hydraulic motor is operated to propel the vehicle.
Claim 3
Dependent Claim
81 words
Apparatus as claimed in claim 1, wherein said motor driven pump means has two pump outlets; wherein two control valves each having one control valve inlet are provided, said control valve inlets being connected with said two pump outlets, respectively; wherein said second control valve outlets are connected with said hoist valve inlets of two hoist valves; comprising two hoist means; and wherein said first hoist valve inlets of said two hoist valves are connected with said two hoist means, respectively.
Claim 4
Dependent Claim
51 words
Apparatus as claimed in claim 1, wherein each of said control valves has a variable flow cross section so that actuation of any one control valve gradually increases or reduces the flow of fluid into said hydraulic motor means whereby the speed of said hydraulic motor means is increased or reduced.
Claim 5
Dependent Claim
21 words
Apparatus as claimed in claim 1, wherein said actuating means include a manually operated means for successively actuating said control valves.
Claim 6
Dependent Claim
52 words
Apparatus as claimed in claim 1, comprising conduit means connecting said first hoist valve outlet with said hoisting device; a hoist presetting valve shunting said conduit means; and auxiliary pump means supplying fluid to said hoist presetting valve so that said hoisting device can be set without operation of said hoist valve.
Claim 7
Dependent Claim
42 words
Apparatus as claimed in claim 1, wherein said hydraulic motor means has inlet means connected with said first control valve outlets; and further comprising conduit means connecting said inlet means with said reservoir; and suction check valve means in said conduit means.
Claim 8
Dependent Claim
31 words
Apparatus as claimed in claim 1 wherein said hydraulic motor means has inlet means and outlet means; further comprising pressure limiting valve means connecting said inlet means with said outlet means.
Claim 9
Dependent Claim
58 words
Apparatus as claimed in claim 1, wherein said hydraulic motor means are operable in opposite directions of rotation; wherein each of said control valves has a neutral position, and two control positions for rotation of said motor means in opposite directions; and wherein said actuating means include means for successively operating said control valves between said positions thereof.
Claim 10
Dependent Claim
58 words
Apparatus as claimed in claim 1, wherein said hoisting device includes a cylinder and a piston forming two chambers in said cylinder; and wherein said hoist valve has a neutral position, and two control positions for directing fluid into said two chambers, respectively, so that the movement of said piston is reversable for lifting and lowering a load.
Claim 11
Dependent Claim
184 words
Hydraulic hoisting apparatus for use with a road vehicle, comprising, in combination, motor driven pump means having a plurality of pump outlets, a pump inlet, and a reservoir to which said pump inlet is connected; hydraulic motor means for propelling the vehicle; a plurality of control valves having control valve inlets connected with said pump outlets, respectively, first control valve outlets connectable with said hydraulic motor means, and second control valve outlets; a plurality of hoisting devices mounted on the vehicle; a plurality of hoist valves for controlling lifting and lowering movements of said hoisting devices, respectively, and having hoist valve inlets communicating with said second control valve outlets of said control valves, respectively, a first hoist valve outlet connected with said hoist devices, respectively, and second hoist valve ouTlets for discharge into said reservoir; and actuating means for actuating said control valves to connect said control valve inlets with said hydraulic motor means while actuating said hoist valves to connect said hoist valve inlets with said second hoist valve outlets, respectively, so that said hydraulic motor means is operated to propel the vehicle.
Claim 12
Dependent Claim
184 words
Hydraulic hoisting apparatus for use with a road vehicle, comprising, in combination, motor driven pump means having a plurality of pump outlets, a pump inlet, and a reservoir to which said pump inlet is connected; hydraulic motor means for propelling the vehicle; a plurality of control valves having control valve inlets connected with said pump outlets, respectively, first control valve outlets connectable with said hydraulic motor means, and second control valve outlets; a plurality of hoisting devices mounted on the vehicle; a plurality of hoist valves for controlling lifting and lowering movements of said hoisting devices, respectively, and having hoist valve inlets communicating with said second control valve outlets of said control valves, respectively, a first hoist valve outlet connected with said hoist devices, respectively, and second hoist valve ouTlets for discharge into said reservoir; and actuating means for actuating said control valves to connect said control valve inlets with said hydraulic motor means while actuating said hoist valves to connect said hoist valve inlets with said second hoist valve outlets, respectively, so that said hydraulic motor means is operated to propel the vehicle.
Claim 13
Dependent Claim
95 words
Apparatus as claimed in claim 10, wherein said actuating means include means for successively operating said control valves between neutral positions in which said hydraulic motor means are not operated, and two control positions in which said hydraulic motor means rotate in opposite directions; wherein each of said control valves gruadually increases the flow cross section thereof when moving from said neutral position to one of said control positions so that the speed of said hydraulic motor means increases when said control valves are successively moved from said neutral positions to the respective control positions.
Claim 14
Dependent Claim
55 words
Apparatus as claimed in claim 10, wherein said road vehicle includes a gantry structure having wheels driven by said hydraulic motor means, and movably supporting one of said hoisting devices in front, and the second hoisting device in the rear; and wherein each of said front and rear hoisting devices includes two cylinder-and-piston hydraulic motors.
Claim 15
Dependent Claim
71 words
Apparatus as claimed in claim 12, comprising two conduit means connecting each hoist valve with said cylinders of one of said hoisting devices; two hoist presetting valves connected with said two conduits; and auxiliary pump means supplying fluid to said hoist presetting valves so that any one of said hoisting pistons can be raised and lowered for attaching a load without operation of said hoist valves and of said pump means.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |