US3757895A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aerial lift vehicle
Assignee: Enerpac Tool Group Corp
•
Filing: 1972-03-10
•
Granted: 1973-09-11
•
Expires: 1992-03-10
Abstract
Abstract An aerial lift vehicle having a carriage rotatably mounted on the vehicle, an electrically insulated boom support on said carriage and an aerial bucket pivotally carried at the upper end of said boom, a hydraulic system for moving the carriage and the boom, the hydraulic system including a number of electrohydraulic proportional remote control valves, a set of electric controllers mounted on said boom for operating the valves, manually actuated levers for each of said electric controllers mounted in a fixed position in said bucket, an electrically insulated push-pull assembly in said boom connecting each of said levers to a corresponding electric controller and a second set of electric controllers connected to said valves at a point remote from said valves, the electrically insulated push-pull assemblies being connected to the mechanical controllers through a set of coaxially arranged rotatable linear motion actuators positioned at the pivot point of the connection of the aerial bucket to the boom.
Inventors
- 👤 D Knutson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:53
CPC Classifications
B; B66; B66F; B66F11/00; B66F11/04; B66F11/044
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
113 words
An aerial lift vehicle having a carriage rotatably mounted on the vehicle, an electrically insulated boom pivotally mounted on said carriage, a bucket pivotally carried at the electrically insulated end of said boom, a hydraulic system operatively connected to move said boom and said carriage, said hydraulic system including, a number of electro-hydraulic proportional valves mounted on the vehicle, a first set of electric monoaxial controllers mounted on said boom for controlling said valves, said controllers being electrically connected to said electro-hydraulic valves, a number of manually actuated levers mounted in said bucket, and a number of electrically insulated push-pull assemblies operatively connecting each of said levers to a corresponding electric monaxial controller.
Claim 2
Dependent Claim
113 words
An aerial lift vehicle having a carriage rotatably mounted on the vehicle, an electrically insulated boom pivotally mounted on said carriage, a bucket pivotally carried at the electrically insulated end of said boom, a hydraulic system operatively connected to move said boom and said carriage, said hydraulic system including, a number of electro-hydraulic proportional valves mounted on the vehicle, a first set of electric monoaxial controllers mounted on said boom for controlling said valves, said controllers being electrically connected to said electro-hydraulic valves, a number of manually actuated levers mounted in said bucket, and a number of electrically insulated push-pull assemblies operatively connecting each of said levers to a corresponding electric monaxial controller.
Claim 3
Dependent Claim
26 words
The hydraulic system according to claim 1 including a second set of electric monaxial controllers connected to said valves at a point remote from said vaLves.
Claim 4
Dependent Claim
27 words
The hydraulic system according to claim 2 including means for connecting said second set of electric monaxial controllers to override said first set of electric monaxial controllers.
Claim 5
Dependent Claim
33 words
The hydraulic system according to claim 1 wherein each of said insulated push-pull assemblies includes a fiberglass sleeve mounted on said boom and a fiberglass rod mounted for axial movement within said sleeve.
Claim 6
Dependent Claim
127 words
An aerial lift vehicle having a carriage rotatably mounted on the vehicle, an electrically insulated boom pivotally mounted on said carriage, a bucket pivotally carried at the electrically insulated end of said boom, a hydraulic system operatively connected to move said boom and said carriage, said hydraulic system including, a number of electro-hydraulic proportional valves, a first set of electric controllers mounted on said boom for controlling said valves, a number of manually actuated levers mounted in said bucket, a number of electrically insulated push-pull assemblies operatively connecting each of said levers to a corresponding electric controller, and a number of rotary linear actuators coaxially mounted at the pivot point of said bucket on said boom and operatively connecting said manual levers to said insulated push-pull assemblies.
Claim 7
Dependent Claim
127 words
An aerial lift vehicle having a carriage rotatably mounted on the vehicle, an electrically insulated boom pivotally mounted on said carriage, a bucket pivotally carried at the electrically insulated end of said boom, a hydraulic system operatively connected to move said boom and said carriage, said hydraulic system including, a number of electro-hydraulic proportional valves, a first set of electric controllers mounted on said boom for controlling said valves, a number of manually actuated levers mounted in said bucket, a number of electrically insulated push-pull assemblies operatively connecting each of said levers to a corresponding electric controller, and a number of rotary linear actuators coaxially mounted at the pivot point of said bucket on said boom and operatively connecting said manual levers to said insulated push-pull assemblies.
Claim 8
Dependent Claim
52 words
The hydraulic system according to claim 5 wherein said rotary linear motion actuators each includes a first member connected to a manual lever, a second member connected to said insulated push-pull assembly, and a sleeve operatively connected to said first and second members, said sleeve allowing for rotary motion between said members.
Claim 9
Dependent Claim
27 words
The hydraulic system according to claim 6 wherein each of said rotary-linear motion actuators is coaxially mounted with respect to each of the other rotary-linear motion actuators.
Claim 10
Dependent Claim
102 words
An aerial lift vehicle including a boom having an electrically insulated boom section, said boom being mounted for articulated movement of said vehicle, a bucket mounted on the insulated end of said boom, means for pivotally mounting said bucket on said boom, a hydraulic system for moving said boom, said system including, electro-hydraulic proportional valves mounted on said vehicle, an electric monaxial controller mounted on said boom and being electrically connected to control said proportional valves, a manually actuated lever mounted in a fixed position in said bucket, and an electrically insulated push-pull assembly operatively connecting said lever to the monaxial controller.
Claim 11
Dependent Claim
102 words
An aerial lift vehicle including a boom having an electrically insulated boom section, said boom being mounted for articulated movement of said vehicle, a bucket mounted on the insulated end of said boom, means for pivotally mounting said bucket on said boom, a hydraulic system for moving said boom, said system including, electro-hydraulic proportional valves mounted on said vehicle, an electric monaxial controller mounted on said boom and being electrically connected to control said proportional valves, a manually actuated lever mounted in a fixed position in said bucket, and an electrically insulated push-pull assembly operatively connecting said lever to the monaxial controller.
Claim 12
Dependent Claim
22 words
The vehicle according to claim 8 wherein said bucket mounting means includes a rotary-linear actuator connecting said lever to said push-pull assembly.
Claim 13
Dependent Claim
33 words
The vehicle according to claim 8 including a second controller operatively connected to said valve at a point remote from said valve and means connecting said second controller to override said first controller.
Claim 14
Dependent Claim
49 words
The vehicle according to claim 9 wherein said rotary-linear motion actuator includes an input member connected to said lever, an output member connected to said assembly and a sleeve operatively connecting said input member to said output member to allow for rotary motion between said input and output members.
Claim 15
Dependent Claim
16 words
The vehicle according to claim 8 including a safety circuit connected to control said overriding means.
Claim 16
Dependent Claim
46 words
The vehicle according to claim 8 wherein said hydraulic system includes a hydraulic assembly connected to move said boom ad controlled by said valve, and means connected to said assembly for locking said assembly in a fixed position when said valve is in a neutral position.
Claim 17
Dependent Claim
42 words
The vehicle according to claim 13 wherein said locking means includes a pressure actuated bypass valve assembly connected to each end of said hydraulic assembly, said valve assemblies being cross connected to respond to pressure in the other of said bypass assemblies.
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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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |