US3848759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Industrial lift trucks
Assignee: Linde Material Handling UK Ltd
•
Filing: 1973-05-04
•
Granted: 1974-11-19
•
Expires: 1993-05-04
Abstract
Abstract An industrial lift truck having a carriage movable up and down a mast, a turret with forks on the carriage. The carriage also carries two opposed racks and meshing gears engage one each of the racks to prevent undesirable swinging of the carriage.
Inventors
- 👤 C Goodacre
- 👤 P Leggett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:46
CPC Classifications
B; B66; B66F; B66F9/00; B66F9/06; B66F9/075; B66F9/12; B66F9/14; B66F9/147; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19642; Y10T74/1967
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
157 words
An industrial lift truck comprising a mast structure mounted on the truck: a load lifting carriage which is movable up and down the mast structure; a turret head mounted on said load lifting carriage for sideways movement relatively thereto; a load supporting structure mounted on said turret head for rotation relatively thereto about an upright axis; two spaced apart horizontally opposed toothed racks which are fixedly mounted on one end of said load lifting carriage and extend across the width thereof; a gear assembly mounted on said turret head and including two gear wheels in mesh with each other which are mounted on said turret head for rotation about parallel upright axes, one of the gear wheels being in mesh with one of said two racks and the other gear wheel being in mesh with the other of said two racks; and means for driving said one gear wheel so as to move said turret head sideways.
Claim 2
Dependent Claim
157 words
An industrial lift truck comprising a mast structure mounted on the truck: a load lifting carriage which is movable up and down the mast structure; a turret head mounted on said load lifting carriage for sideways movement relatively thereto; a load supporting structure mounted on said turret head for rotation relatively thereto about an upright axis; two spaced apart horizontally opposed toothed racks which are fixedly mounted on one end of said load lifting carriage and extend across the width thereof; a gear assembly mounted on said turret head and including two gear wheels in mesh with each other which are mounted on said turret head for rotation about parallel upright axes, one of the gear wheels being in mesh with one of said two racks and the other gear wheel being in mesh with the other of said two racks; and means for driving said one gear wheel so as to move said turret head sideways.
Claim 3
Dependent Claim
58 words
An industrial lift truck according to claim 1, wherein the gear assembly comprises a further gear wheel mounted on the turret head at a different level from the first mentioned gear wheels and also rotatable about an upright axis, which further gear wheel meshes with a further toothed rack extending across the width of the load lifting carriage.
Claim 4
Dependent Claim
20 words
An industrial lift truck according to claim 2, wherein the further gear wheel is coaxial with said one gear wheel.
Claim 5
Dependent Claim
34 words
An industrial lift truck according to claim 3, wherein the said one gear wheel and the said further gear wheel are vertically spaced apart on a single vertical shaft carried on the turret head.
Claim 6
Dependent Claim
63 words
An industrial lift truck according to claim 4, wherein there is provided on the turret head a second gear assembly similar to and spaced laterally from the first-mentioned gear assembly, the second gear assembly being in engagement with said two racks, and arranged to move out of engagement with said two racks when said turret head approaches one end of a sideways movement.
Claim 7
Dependent Claim
33 words
An industrial lift truck according to claim 5, wherein said means for driving comprises a motor which is drivably connected to rotate at least one of the gear wheels of each gear assembly.
Claim 8
Dependent Claim
29 words
An industrial lift truck According to claim 6, wherein the motor is drivably connected to an intermediate gear wheel which meshes with one gear wheel of each gear assembly.
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) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |