Patent US3773202A successfully refreshed from Google Patents.
US3773202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable load stabilizer frame for forklift truck and method
Assignee: Individual
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Filing: 1972-08-28
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Granted: 1973-11-20
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Expires: 1992-08-28
Abstract
Abstract An adjustable frame for a load stabilizer mounted in vertically spaced and substantially superimposed relation over fork means on a forklift truck is disclosed. The frame includes a reciprocating extension means mounted to the forklift carriage and a reciprocating stabilizer carrying frame portion, preferably telescopically mounted with respect to the extension means. A locking sleeve formed to allow selective locking to both or one of the extension means and stabilizer frame is also provided for adjustment of the range heights through which the stabilizer may be positioned. A method, which can be performed by a single forklift operator, of adjusting the stabilizer by alternately utilizing the stabilizer driving means and the carriage on which the stabilizer is mounted to support the weight of the stabilizer is also disclosed.
Inventors
- 👤 J Dutra
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:27
CPC Classifications
B; B66; B66F; B66F9/00; B66F9/06; B66F9/075; B66F9/12; B66F9/18
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
251 words
In a forklift truck having an upright lift frame, a movable carriage mounted to said frame for vertical reciprocation, said carriage further being provided with fork means for support of a load, load stabilizer means mounted in vertically spaced and substantially superimposed relation to said fork means for vertical reciprocation thereover, and stabilizer driving means connected to said stabilizer means to raise and lower said stabilizer means through a range of heights with respect to said fork means, the improvement comprising: an adjustable load stabilizer frame mounting said stabilizer means on said carriage for selective adjustment of the range of heights above said fork means through which said stabilizer means can be raised and lowered, said stabilizer frame including: 1. a reciprocating extension means mounted on said carriage for reciprocation in a vertical direction with respect to said fork means; 2. a stabilizer frame portion mounted on said extension means for vertical reciprocation with respect to said extension means and to said fork means, said stabilizer means being mounted on said frame portion; and 3. locking means secured to said stabilizer driving means for movement therewith, said locking means being positioned adjacent said extension means and said frame portion and formed for reciprocation with respect thereto and for selective securement to both said extension means and said frame portion, and said locking means being further formed for securement to one of said extension means and said frame portion for reciprocation of only the secured one thereof by said stabilizer driving means.
Claim 2
Dependent Claim
251 words
In a forklift truck having an upright lift frame, a movable carriage mounted to said frame for vertical reciprocation, said carriage further being provided with fork means for support of a load, load stabilizer means mounted in vertically spaced and substantially superimposed relation to said fork means for vertical reciprocation thereover, and stabilizer driving means connected to said stabilizer means to raise and lower said stabilizer means through a range of heights with respect to said fork means, the improvement comprising: an adjustable load stabilizer frame mounting said stabilizer means on said carriage for selective adjustment of the range of heights above said fork means through which said stabilizer means can be raised and lowered, said stabilizer frame including: 1. a reciprocating extension means mounted on said carriage for reciprocation in a vertical direction with respect to said fork means; 2. a stabilizer frame portion mounted on said extension means for vertical reciprocation with respect to said extension means and to said fork means, said stabilizer means being mounted on said frame portion; and 3. locking means secured to said stabilizer driving means for movement therewith, said locking means being positioned adjacent said extension means and said frame portion and formed for reciprocation with respect thereto and for selective securement to both said extension means and said frame portion, and said locking means being further formed for securement to one of said extension means and said frame portion for reciprocation of only the secured one thereof by said stabilizer driving means.
Claim 3
Dependent Claim
33 words
a stabilizer frame portion mounted on said extension means for vertical reciprocation with respect to said extension means and to said fork means, said stabilizer means being mounted on said frame portion; and
Claim 4
Dependent Claim
33 words
a stabilizer frame portion mounted on said extension means for vertical reciprocation with respect to said extension means and to said fork means, said stabilizer means being mounted on said frame portion; and
Claim 5
Dependent Claim
51 words
A forklift truck having an adjustable load stabilizer frame as defined in claim 1 wherein, said carriage is formed with a vertically extending guide means; and said extension means is mounted for reciprocation on said guide means, said guide means, extension means and frame portion being mounted in relatively telescoped relation.
Claim 6
Dependent Claim
76 words
locking means secured to said stabilizer driving means for movement therewith, said locking means being positioned adjacent said extension means and said frame portion and formed for reciprocation with respect thereto and for selective securement to both said extension means and said frame portion, and said locking means being further formed for securement to one of said extension means and said frame portion for reciprocation of only the secured one thereof by said stabilizer driving means.
Claim 7
Dependent Claim
76 words
locking means secured to said stabilizer driving means for movement therewith, said locking means being positioned adjacent said extension means and said frame portion and formed for reciprocation with respect thereto and for selective securement to both said extension means and said frame portion, and said locking means being further formed for securement to one of said extension means and said frame portion for reciprocation of only the secured one thereof by said stabilizer driving means.
Claim 8
Dependent Claim
168 words
A forklift truck having an adjustable load stabilizer frame as defined in claim 2 wherein, said frame portion is formed with a plurality of vertically spaced horizontally extending channels therethrough; and said locking means is formed as a sleeve substantially surrounding said extension means and said frame portion and formed with a plurality of vertically spaced horizontally extending channels, and one of said channels of said locking means is further alignable with a horizontally extending channel through an upper end of said extension means, at least a pair of said channels in said frame portion being postionable in relative registration with a pair of channels in said sleeve, and said channel in said extension means capable of being in registration with one of said channels in said sleeve and one of said channels in said frame portion, and said locking means further including at least a pair of pin elements removably mounted to extend into said registered channels in said sleeve, said extension means and said frame portion.
Claim 9
Dependent Claim
96 words
A forklift truck having an adjustable load stabilizer frame as defined in claim 2, and stop means mounted on said extension means and formed to limit the downward reciprocation of said locking means with respect to said extension means and further formed to limit the downward reciprocation of said extension means with respect to said guide means; and wherein, said locking means is formed for releasable securement to said frame portion at a first vertical position thereon, and said extension means is formed for releasable securement to said frame portion at a second vertical position thereon.
Claim 10
Dependent Claim
211 words
A forklift truck having an adjustable load stabilizer frame as defined in claim 1, wherein said carriage includes a pair of laterally spaced, vertically extending, tubular guide elements fixedly secured to said carriage for movement with said fork means; said extension means is formed by a pair of tubular extension members telescopically mounted for vertical reciprocation in said guide elements; said frame portion is formed by a pair of frame members telescopically mounted for vertical reciprocation in said pair of tubular extension members and said frame members have said stabilizer means secured to the upper ends thereof; said stabilizer driving means is formed as a hydraulic piston and cylinder and pump means therefor, and one of said piston and cylinder is secured to said carriage and the remaining of said piston and cylinder is secured to a transverse cross-bar extending between said pairs of telescopically mounted members; and said locking means includes, a pair of sleeves secured to opposite ends of said transverse cross-bar with each sleeve being mounted in sliding engagement around said telescopically mounted members, and locking pin means mounted on each of said sleeves and formed for selective releasable securement to said pair of tubular extension members and for selective releasable securement to said pair of frame members.
Claim 11
Independent Claim
238 words
A method of adjusting the height of a load stabilizer means over a fork means mounted on a vertically reciprocal carriage on a forklift truck comprising: vertically positioning said stabilizer means to a selected vertical height over said fork means by load stabilizer driving means formed for vertical reciprocation of said stabilizer means and releasably secured to a vertically reciprocal extension means and to a vertically reciprocable frame portion of said stabilizer means by sleeve means; releasing said sleeve means from said extension means while maintaining said sleeve means secured to said frame portion, said extension means being mounted for vertical reciprocation in guide means carried by said carriage; vertically displacing said sleeve means and said frame portion with said stabilizer driving means; securing said frame portion for support of the weight of said stabilizer means to said guide means; releasing said sleeve means from said frame portion while maintaining said frame portion secured to said guide means; vertically displacing said sleeve means with respect to said frame portion with said stabilizer driving means to a selected adjusted position on said frame portion; locking said sleeve means to said frame portion at said adjusted position; and thereafter locking said extension means to said sleeve means and said frame portion and releasing frame portion from said guide means for reciprocation of said extension means, frame portion and stabilizer by said stabilizer driving means while locked in said adjusted position.
Claim 12
Independent Claim
238 words
A method of adjusting the height of a load stabilizer means over a fork means mounted on a vertically reciprocal carriage on a forklift truck comprising: vertically positioning said stabilizer means to a selected vertical height over said fork means by load stabilizer driving means formed for vertical reciprocation of said stabilizer means and releasably secured to a vertically reciprocal extension means and to a vertically reciprocable frame portion of said stabilizer means by sleeve means; releasing said sleeve means from said extension means while maintaining said sleeve means secured to said frame portion, said extension means being mounted for vertical reciprocation in guide means carried by said carriage; vertically displacing said sleeve means and said frame portion with said stabilizer driving means; securing said frame portion for support of the weight of said stabilizer means to said guide means; releasing said sleeve means from said frame portion while maintaining said frame portion secured to said guide means; vertically displacing said sleeve means with respect to said frame portion with said stabilizer driving means to a selected adjusted position on said frame portion; locking said sleeve means to said frame portion at said adjusted position; and thereafter locking said extension means to said sleeve means and said frame portion and releasing frame portion from said guide means for reciprocation of said extension means, frame portion and stabilizer by said stabilizer driving means while locked in said adjusted position.
Claim 13
Dependent Claim
119 words
A method of adjusting the height of a load stabilizer over fork means as defined in claim 6 and the additional steps of: securing said extension means to said frame portion to effect the securing of said frame portion to the guide means for support of the weight of sAid stabilizer means, said extension means being formed to transfer the weight of said stabilizer means to said guide means; and after locking said sleeve means to said frame portion at said adjusted position, releasing said extension means from said frame portion and releasing said frame portion from said guide means; and vertically displacing said sleeve means and said frame portion until said sleeve means is adjacent said extension means.
References Cited (Backward Citations)
US2875912A
Cited
US3133655A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |