US3679256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Overhead guard for lift truck
Assignee: Doosan Bobcat North America Inc
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Filing: 1971-05-10
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Granted: 1972-07-25
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Expires: 1991-05-10
Abstract
Abstract An overhead guard for the protection of operators of lift trucks of a type in which the rear truck portion is housed in hinged and transversely swingable doors or body housing portions to permit ready access to the rearwardly located truck operating components. The rear support legs of the overhead guard may be quickly connected to and detached from the swingable doors by an adjustable sleeve and short support legs which are secured to the doors.
Inventors
- 👤 James L Orns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:06
CPC Classifications
B; B66; B66F; B66F9/00; B66F9/06; B66F9/075; B66F9/07545
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
290 words
For use with industrial lift trucks having front and rear portions and an intermediate operator''s station, said rear portion including a swingable body cover portion hingedly connected at one side of the truck for pivotable movement outwardly of the truck about a vertical axis, an overhead guard comprising a generally inverted U-shaped guard structure secured rigidly to the front portion, extending rearwardly over the operator''s station and thence projecting downwardly in spaced essentially parallel rear legs, and means for connecting to and disconnecting from said rear body portion one of the rear leg end portions including an upwardly projecting member secured to said rear body portion which is adapted to align substantially axially with the rear leg end portion, and an elongated slidable sleeve member mounted on the end portion of the rear leg having a pair of axially spaced openings extending transversely through at least one side of said sleeve, an opening extending transversely through the end portion of said rear leg, said sleeve being movable axially of said rear leg end portion for aligning a selected one of the spaced openings in said sleeve with the opening in said rear leg, and a member for engaging either pair of said aligned openings, said sleeve being held in an up position when one of said pair of openings is engaged by said latter member to allow disconnection of the said rear body portion and pivotal movement outwardly from said rear leg and being held in a down position when the other of said pair of openings is engaged by said latter member in which down position the rear leg end portion and the upwardly projecting member are substantially axially aligned for holding the same in a fixed relative position.
Claim 2
Dependent Claim
290 words
For use with industrial lift trucks having front and rear portions and an intermediate operator''s station, said rear portion including a swingable body cover portion hingedly connected at one side of the truck for pivotable movement outwardly of the truck about a vertical axis, an overhead guard comprising a generally inverted U-shaped guard structure secured rigidly to the front portion, extending rearwardly over the operator''s station and thence projecting downwardly in spaced essentially parallel rear legs, and means for connecting to and disconnecting from said rear body portion one of the rear leg end portions including an upwardly projecting member secured to said rear body portion which is adapted to align substantially axially with the rear leg end portion, and an elongated slidable sleeve member mounted on the end portion of the rear leg having a pair of axially spaced openings extending transversely through at least one side of said sleeve, an opening extending transversely through the end portion of said rear leg, said sleeve being movable axially of said rear leg end portion for aligning a selected one of the spaced openings in said sleeve with the opening in said rear leg, and a member for engaging either pair of said aligned openings, said sleeve being held in an up position when one of said pair of openings is engaged by said latter member to allow disconnection of the said rear body portion and pivotal movement outwardly from said rear leg and being held in a down position when the other of said pair of openings is engaged by said latter member in which down position the rear leg end portion and the upwardly projecting member are substantially axially aligned for holding the same in a fixed relative position.
Claim 3
Dependent Claim
109 words
An industrial truck as claimed in claim 1 wherein a second swingable body cover portion is hinged at the opposite side of the truck for opposite pivotal movement about a second vertical axis, and the other rear leg has an end portion of a construction like that of the one rear leg end portion and in allochiral relation thereto, and a second upwardly projecting member secured to said second rear body portion and adapted to be connected and disconnected from the other rear leg end portion in a manner similar to the connection and disconnection of the first mentioned upwardly projecting member to the one rear leg end portion.
Claim 4
Dependent Claim
52 words
An overhead guard as claimed in claim 1 wherein the end surfaces of said upwardly projecting member and rear leg end portion are biased downwardly and inwardly of the truck such that a load on the overhead guard tends to move the rear leg inwardly of the truck along the biased surfaces.
Claim 5
Dependent Claim
61 words
An overhead guard as claimed in claim 1 wherein said sleeve member has an opening at the lower end and in the outer side permitting passage of the upwardly projecting member through said opening during swinging movement of the rear body portion in or out of engagement with the rear leg when the sleeve member is located in a raised portion.
Claim 6
Dependent Claim
43 words
An overhead guard as claimed in claim 4 wherein said sleeve member also includes a closed inner wall at its lower end which functions as a stop member during swinging movement of the rear body portion into operative relation with the rear leg.
Claim 7
Dependent Claim
73 words
An overhead guard as claimed in claim 1 wherein the main rear leg of the guard is hollow, the rear leg end portion includes a downward solid projection at the lower end of smaller cross section than the main rear lEg portion, said sleeve member surrounding said solid projection, and a stop limiting upward movement of the sleeve member at the place of connection between the solid projection and the main rear leg.
Claim 8
Dependent Claim
31 words
An overhead guard as claimed in claim 1 wherein the upper sleeve opening extends entirely through the sleeve portion and the lower sleeve opening extends through only one side wall 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) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |