US4403903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extension member for surrogate forks for a fork lift truck
Assignee: Individual
•
Filing: 1981-09-21
•
Granted: 1983-09-13
•
Expires: 2001-09-21
Abstract
Abstract This invention relates to an extension for fork lift trucks that provides an attachment for increasing the depth to which forks may descend and operate, and the improvement thereto of a simple, economical, and effective joining member in the form of a channel, which replaces the former tubular joining member, and which has certain operational advantages thereover.
Inventors
- 👤 Arthur P. Cary
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:52
CPC Classifications
B; B66; B66F; B66F9/00; B66F9/06; B66F9/075; B66F9/12; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32254; Y10T403/32467
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
144 words
In a fork lift truck having forwardly extending forks, a. surrogate fork members comprising an upper horizontal portion, a vertically extending central portion, and a lower surrogate fork portion, operatively positioned ahead of said forks, b. said surrogate fork portions of said surrogate fork members extending forward and substantially parallel to said truck forks, c. an extension member intermediate said truck forks and said surrogate fork members and joining them in operative relationship, d. said extension members comprising channels overlying portions of said truck forks and portions of said upper horizontal portions of said surrogate fork members, e. forward and rearward straps of a width shorter than their length attached to and extending across the underside of said channels near the ends thereof, wherein the rearward straps underlie said forks and the forward straps underlie said upper horizontal portion of said surrogate fork members.
Claim 2
Dependent Claim
144 words
In a fork lift truck having forwardly extending forks, a. surrogate fork members comprising an upper horizontal portion, a vertically extending central portion, and a lower surrogate fork portion, operatively positioned ahead of said forks, b. said surrogate fork portions of said surrogate fork members extending forward and substantially parallel to said truck forks, c. an extension member intermediate said truck forks and said surrogate fork members and joining them in operative relationship, d. said extension members comprising channels overlying portions of said truck forks and portions of said upper horizontal portions of said surrogate fork members, e. forward and rearward straps of a width shorter than their length attached to and extending across the underside of said channels near the ends thereof, wherein the rearward straps underlie said forks and the forward straps underlie said upper horizontal portion of said surrogate fork members.
Claim 3
Dependent Claim
39 words
An extension member as in claim 1, wherein the length of said channel exceeds the combined overlaid portions of the lengths of said truck forks and said upper horizontal portion of said surrogate fork members extending into said channel.
Claim 4
Dependent Claim
29 words
An extension member as in claim 1, wherein said straps are all substantially the same width, and which width is substantially less than one-half the length of said channel.
Claim 5
Dependent Claim
29 words
An extension member as in claim 3, wherein said straps are attached to said extension members at substantially the same location relative to the ends of said extension members.
Claim 6
Dependent Claim
29 words
An extension member as in claim 1, wherein the width of said channel is such as to provide at least an easy sliding fit over all of said forks.
Claim 7
Dependent Claim
27 words
An extension member as in claim 1, wherein the ends of said channels are interchangeable in operation with either said truck forks or said surrogate fork members.
Claim 8
Dependent Claim
28 words
An extension member as in claim 1, wherein all of the connections between said extension members, said truck forks, and said surrogate fork members are frictional in nature.
References Cited (Backward Citations)
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Cited
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US3587893A
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Cited
US3850322A
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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) | 1986-09-12 | 1987-03-14 | 1987-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-12 | 1991-03-14 | 1991-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-12 | 1995-03-14 | 1995-09-13 | $7700.00 | Window Closed / Lapsed |