Patent US3601423A successfully refreshed from Google Patents.
US3601423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Industrial pallet and stillage trucks
Assignee: Linde Material Handling UK Ltd
•
Filing: 1969-06-25
•
Granted: 1971-08-24
•
Expires: 1989-06-25
Abstract
Abstract An industrial pallet truck comprises a body portion, a loadcarrying portion mounted for up-and-down movement relatively to the body portion, two hydraulic rams for raising a root portion of the load-carrying portion, and a linkage operable by movement of the root portion relatively to the body portion and including ground engaging members for raising and lowering the end of the load-carrying portion remote from the root portion, in unison with the root portion. Each ram comprises a cylinder connected to the body portion and a plunger connected to the load-carrying portion and the linkage comprises two operative levers each pivotally connected at its fulcrum to said root portion, each lever also being pivotally connected directly to the lower end of the cylinder of one of the rams, so that up-and-down movement of the root portion imparts pivoting movement to the lever to operate said linkage. The truck has fork arms which may be attached to the load-carrying portion in alternative positions.
Inventors
- 👤 Cecil Goodacre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:09
CPC Classifications
B; B62; B62B; B62B3/00; B62B3/04; B62B3/06; B62B3/0612; B62B2301/00; B62B2301/08; B62B3/0625
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
150 words
An industrial truck comprising a body portion, a loadcarrying portion mounted for up-and-down movement relatively to the body portion, two hydraulic rams for raising a root portion of the load-carrying portion, and a linkage operable by movement of the root portion relatively to the body portion and including ground engaging members for raising and lowering the end of the load-carrying portion remote from the root portion, in unison with the root portion each ram comprising a stationary part connected to the body portion by a readily detachable rigid connection and a moving part connected to the load-carrying portion, and the linkage comprising two operative levers each pivotally connected to said root portion, each lever also being pivotally connected directly to the lower end of the stationary part of one of the rams, so that up-and-down movement of the root portIon imparts pivoting movement to the lever to operate said linkage.
Claim 2
Dependent Claim
150 words
An industrial truck comprising a body portion, a loadcarrying portion mounted for up-and-down movement relatively to the body portion, two hydraulic rams for raising a root portion of the load-carrying portion, and a linkage operable by movement of the root portion relatively to the body portion and including ground engaging members for raising and lowering the end of the load-carrying portion remote from the root portion, in unison with the root portion each ram comprising a stationary part connected to the body portion by a readily detachable rigid connection and a moving part connected to the load-carrying portion, and the linkage comprising two operative levers each pivotally connected to said root portion, each lever also being pivotally connected directly to the lower end of the stationary part of one of the rams, so that up-and-down movement of the root portIon imparts pivoting movement to the lever to operate said linkage.
Claim 3
Dependent Claim
26 words
An industrial truck according to claim 1 wherein the moving part of each ram is connected to the load-carrying portion by a readily detachable pivotal connection.
Claim 4
Dependent Claim
29 words
An industrial truck according to claim 1 wherein the cylinder of each ram constitutes the stationary part thereof, and the plunger of the ram constitutes the moving part thereof.
Claim 5
Dependent Claim
43 words
An industrial truck according to claim 1 wherein the upper end of each ram cylinder is bolted to a part of the body portion and the lower end of the ram cylinder fits in a socket in a part of the body portion.
Claim 6
Dependent Claim
39 words
An industrial truck according to claim 3 wherein a part of each said operative lever is received within an axial slot in a part of its associated ram cylinder and is retained in the slot by a pivotal connection.
Claim 7
Dependent Claim
18 words
An industrial truck according to claim 1 wherein the two operative levers are secured to a common shaft.
Claim 8
Dependent Claim
43 words
An industrial truck according to claim 1 wherein the load-carrying portion comprises two spaced horizontal fork arms and means are provided for attaching the ends of the fork arms to the root portion of the load-carrying portion in a plurality of alternative positions.
Claim 9
Dependent Claim
60 words
An industrial truck according to claim 7 wherein each fork arm is formed with a plurality of holes adapted to be registrable with any one of a number of sets of holes in the root portion whereby the fork arms may be bolted to the root portion in a plurality of alternative positions by bolts passing through the registering holes.
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) | 1974-08-23 | 1975-02-22 | 1975-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-23 | 1979-02-22 | 1979-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-23 | 1983-02-22 | 1983-08-24 | $7700.00 | Window Closed / Lapsed |