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US4002256A Expired / Lapsed US ⏱️ 0.0 years remaining

Lift assembly

Assignee: Caterpillar Industrial Inc
•
Filing: 1975-08-28
•
Granted: 1977-01-11
•
Expires: 1995-08-28
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Abstract

Abstract The invention is concerned with an improvement in a carriage-fork assembly. The assembly includes a carriage attachable to a lift truck, the carriage including a plurality of notches along an upper edge thereof. The assembly also includes a plurality of forks, the forks each including a first arm extending generally perpendicularly forwardly from the carriage, a second arm extending upwardly from an end of the first arm adjacent and parallel to the carriage to adjacent the upper edge thereof and a member extending from the first arm over the upper edge and downwardly behind the carriage, the member including a guide sleeve extending upwardly over the upper edge and a bore coaxial with the guide sleeve and extending through the member. Also part of the assembly is a lock rod slidably fitting within the guide sleeve and the bore. A spring is provided for biasing the lock rod downwardly to impel a lower end thereof into the notches. The structure is such that the lock rod can be maintained in a fixed position against the spring with the lower end removed from the notches. The improvement includes a cap affixed over an upper end of the lock rod, the cap has a top and a skirt extending downwardly about the lock rod, an inner surface of the skirt fitting slidingly about an outer surface of the upwardly extending portion of the guide sleeve.

Inventors

  • 👤 Richard J. Kroboth

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-24 19:28
CPC Classifications
B; B66; B66F; B66F9/00; B66F9/06; B66F9/075; B66F9/12; Y; Y10; Y10T; Y10T403/00; Y10T403/60; Y10T403/602; Y10T403/604

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 190 words
In a liftable assembly comprising a carriage liftably attachable to mast means, the carriage including a notch along an upper edge thereof; a lifter which extends generally perpendicularly forwardly from and generally upwardly and generally parallel to said carriage to adjacent an upper edge of said carriage and a member extending from said lifter over said upper edge and downwardly behind said carriage, said member including a guide sleeve extending upwardly over said upper edge and a bore coaxial with said guide sleeve and extending through said member; a lock rod slidably fitting within said guide sleeve and said bore; means for biasing said lock rod downwardly to impel a lower end thereof into said notch and means for fastening said lock rod in a fixed position against said biasing means with said lower end removed from said notch; and improvement comprising: a cap affixed over an upper end of said lock rod to move therewith, said cap having a generally disc-like top with a skirt extending downwardly thereabout, an inner surface of said skirt fitting slidingly about an outer surface of said upwardly extending portion of said guide sleeve.
Claim 2
Dependent Claim 190 words
In a liftable assembly comprising a carriage liftably attachable to mast means, the carriage including a notch along an upper edge thereof; a lifter which extends generally perpendicularly forwardly from and generally upwardly and generally parallel to said carriage to adjacent an upper edge of said carriage and a member extending from said lifter over said upper edge and downwardly behind said carriage, said member including a guide sleeve extending upwardly over said upper edge and a bore coaxial with said guide sleeve and extending through said member; a lock rod slidably fitting within said guide sleeve and said bore; means for biasing said lock rod downwardly to impel a lower end thereof into said notch and means for fastening said lock rod in a fixed position against said biasing means with said lower end removed from said notch; and improvement comprising: a cap affixed over an upper end of said lock rod to move therewith, said cap having a generally disc-like top with a skirt extending downwardly thereabout, an inner surface of said skirt fitting slidingly about an outer surface of said upwardly extending portion of said guide sleeve.
Claim 3
Dependent Claim 77 words
An improvement in a liftable assembly as in claim 1, wherein said lock rod includes a hole therethrough adjacent the upper end thereof perpendicular to the axis thereof, said skirt includes a pair of apertures opposite each other and in alignment with said hole and said fastening means comprises a pin affixed through said apertures and said hole and extending laterally from said skirt, and said guide sleeve includes an upraised portion for receiving thereupon said pin.
Claim 4
Dependent Claim 34 words
An improvement in a liftable assembly as in claim 2, wherein said pin extends from each of said pair of apertures to form a handle for lifting said lock rod against said biasing means.
Claim 5
Dependent Claim 41 words
An improvement in a liftable assembly as in claim 3, including a lubricant between the inner surface of said skirt and the outer surface of said guide sleeve and between the inner surface of said guide sleeve and said lock rod.
Claim 6
Dependent Claim 28 words
An improvement in a liftable assembly as in claim 4, wherein an inner surface of said cap is supportedly contacted by the upper end of said lock rod.

References Cited (Backward Citations)

US649444A Cited
US657468A Cited
US1834909A Cited
US2668602A Cited
US2975924A Cited
US3027033A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1980-01-11 1980-07-12 1981-01-11 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1984-01-11 1984-07-12 1985-01-11 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1988-01-11 1988-07-12 1989-01-11 $7700.00 Window Closed / Lapsed

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