US3754673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detachable fork for lift trucks
Assignee: Doosan Bobcat North America Inc
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Filing: 1971-12-13
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Granted: 1973-08-28
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Expires: 1991-12-13
Abstract
Abstract A fork mount particularly for heavy duty lift trucks which provides a side shiftable shaft mounted fork hanger bracket having hook portions for receiving stub support shafts of a rapidly detachable fork tine, and a manipulatable keeper element for retaining the stub shafts in the hook portions for operation and for permitting the rapid release thereof for detachment of the fork tines from the lift truck under selected conditions.
Inventors
- 👤 R Barda
- 👤 W Ward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:41
CPC Classifications
B; B66; B66F; B66F9/00; B66F9/06; B66F9/075; B66F9/12; B66F9/14; B66F9/142; B66F9/143
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
220 words
In a lift truck having a fork carriage mounted for elevation in an upright, a fork mounting means including a transverse fork support, a pair of transversely spaced fork hanger brackets depending from said support, a fork tine having at the upper end a projection receivable between said fork hanger brackets, said fork hanger brackets including a pair of forwardly opening hook portions, oppositely outwardly extending shaft means on said fork tine projection receivable in and disengageable from said hook portions, said adjustable means including a sleeve rotatable on the fork support and having a stop means secured thereto and rotatable with the sleeve into and out of inhibiting relation to the upper projection of said fork tine whereby to prevent the accidental disengagement of the fork tine during operation of the lift truck when the stop means is rotated to a first position and to permit disengagement of the fork tine from said pair of fork hanger brackets when it is rotated to a second position, said fork tine being readily engageable and disengageable by said fork brackets when said stop means is in said second position by manipulation of the fork carriage up and down in relation to the engageable shaft means on the fork tine projection when the fork tine is self-supported on the truck supporting surface.
Claim 2
Dependent Claim
220 words
In a lift truck having a fork carriage mounted for elevation in an upright, a fork mounting means including a transverse fork support, a pair of transversely spaced fork hanger brackets depending from said support, a fork tine having at the upper end a projection receivable between said fork hanger brackets, said fork hanger brackets including a pair of forwardly opening hook portions, oppositely outwardly extending shaft means on said fork tine projection receivable in and disengageable from said hook portions, said adjustable means including a sleeve rotatable on the fork support and having a stop means secured thereto and rotatable with the sleeve into and out of inhibiting relation to the upper projection of said fork tine whereby to prevent the accidental disengagement of the fork tine during operation of the lift truck when the stop means is rotated to a first position and to permit disengagement of the fork tine from said pair of fork hanger brackets when it is rotated to a second position, said fork tine being readily engageable and disengageable by said fork brackets when said stop means is in said second position by manipulation of the fork carriage up and down in relation to the engageable shaft means on the fork tine projection when the fork tine is self-supported on the truck supporting surface.
Claim 3
Dependent Claim
33 words
A fork mounting means as claimed in claim 1 wherein means are provided for actuating said fork hanger brackets axially of said fork support shaft either with or independ-ently of said fork tine.
Claim 4
Dependent Claim
56 words
A fork mounting means as claimed in claim 1 wherein said fork hanger brackets comprises a pair of forwardly opening hook members, said fork tine having extended outwardly in opposite directions from the upper end thereof shaft means adapted to be received in said hook members from an upright ground supported position of the fork tine.
Claim 5
Dependent Claim
48 words
A fork mounting means as claimed in claim 1 wherein said fork hanger brackets each includes outer downwardly depending side plates secured to the bracket and also depending from said fork support shaft, and said actuating means is connected to the fork carriage and to the side plates.
Claim 6
Dependent Claim
113 words
In a lift truck having a fork carriage mounted for elevation in an upright, a fork mounting means including a transversely extending fork support shaft, a pair of transversely spaced fork hanger brackets depending from said support shaft, a fork tine adapted to be received in said pair of fork hanger brackets, and adjustable means located between said pair of hanger brackets comprising a sleeve mounted on said shaft for rotation between two operative positions and stop means secured to said sleeve and rotatable therewith for preventing disengagement of the fork tine from said brackets in one operative position of saiD sleeve and for permitting disengagement thereof in the other operative position thereof.
Claim 7
Dependent Claim
113 words
In a lift truck having a fork carriage mounted for elevation in an upright, a fork mounting means including a transversely extending fork support shaft, a pair of transversely spaced fork hanger brackets depending from said support shaft, a fork tine adapted to be received in said pair of fork hanger brackets, and adjustable means located between said pair of hanger brackets comprising a sleeve mounted on said shaft for rotation between two operative positions and stop means secured to said sleeve and rotatable therewith for preventing disengagement of the fork tine from said brackets in one operative position of saiD sleeve and for permitting disengagement thereof in the other operative position thereof.
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) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |