GB1349801A - Hydraulic dock leveller - Google Patents
Hydraulic dock levellerInfo
- Publication number
- GB1349801A GB1349801A GB1349801DA GB1349801A GB 1349801 A GB1349801 A GB 1349801A GB 1349801D A GB1349801D A GB 1349801DA GB 1349801 A GB1349801 A GB 1349801A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lip
- platform
- raised
- ram
- lowered
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G69/00—Auxiliary measures taken, or devices used, in connection with loading or unloading
- B65G69/28—Loading ramps; Loading docks
- B65G69/2805—Loading ramps; Loading docks permanently installed on the dock
- B65G69/2811—Loading ramps; Loading docks permanently installed on the dock pivoting ramps
- B65G69/2817—Loading ramps; Loading docks permanently installed on the dock pivoting ramps with fluid-operated means
- B65G69/2823—Loading ramps; Loading docks permanently installed on the dock pivoting ramps with fluid-operated means extensible by pivoting parts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vehicle Step Arrangements And Article Storage (AREA)
Abstract
1349801 Dock levellers BLUE GIANT EQUIPMENT OF CANADA Ltd 11 March 1971 6614/71 Heading B8E In a dock-leveller 16, Fig. 1, raised by an hydraulic ram 78, 80, a lip 18 is automatically raised as the ram extends. A cable 118, which extends between a cross-member 66 and links 110, 106, 102, Fig. 10, raises the lip, and a pivoted spring-loaded rod 132 holds the lip in the raised position when the cable 118 becomes slack as the platform is lowered. The rod 132 pivots downwards out of engagement with the lip-raising levers when the lip is resting on a support. Thus, when the platform is subsequently raised, the lip hangs vertically again. A manually operated lever 144, Fig. 8, is provided for raising the lip to clear a frame member 44 as the platform is lowered so that the latter may be lowered below the horizontal position. Stops 160 provide alternative positive support positions for the lip and platform. The hydraulic circuit includes a pressure relief valve to prevent over-pressurization, a check-valve to permit extension of the ram when the platform is raised by a vehicle, and means for preventing sudden descent of the platform if the vehicle supporting it is inadvertently moved.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB661471 | 1971-03-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1349801A true GB1349801A (en) | 1974-04-10 |
Family
ID=9817672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1349801D Expired GB1349801A (en) | 1971-03-11 | 1971-03-11 | Hydraulic dock leveller |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1349801A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5323503A (en) * | 1992-11-05 | 1994-06-28 | Rite-Hite Corporation | Lip extension and control device for dock levelers |
| US7032267B2 (en) | 2004-05-11 | 2006-04-25 | Rite-Hite Holding Corporation | Dock leveler with combination safety leg and lip deflector |
| GB2438084A (en) * | 2006-05-11 | 2007-11-14 | William Mark Adams | Portable dock leveller |
-
1971
- 1971-03-11 GB GB1349801D patent/GB1349801A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5323503A (en) * | 1992-11-05 | 1994-06-28 | Rite-Hite Corporation | Lip extension and control device for dock levelers |
| US7032267B2 (en) | 2004-05-11 | 2006-04-25 | Rite-Hite Holding Corporation | Dock leveler with combination safety leg and lip deflector |
| GB2438084A (en) * | 2006-05-11 | 2007-11-14 | William Mark Adams | Portable dock leveller |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |