Patent US3844382A successfully refreshed from Google Patents.
US3844382A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mast mounted overhead guard
Assignee: AC MATERIAL HANDLING Corp 777 MANOR PARK DRIVE COLUMBUS OHIO 43228 A CORP OHIO
•
Filing: 1973-03-23
•
Granted: 1974-10-29
•
Expires: 1993-03-23
Abstract
Abstract An electric lift truck with a mast, an operator''s station and a battery compartment located intermediate the mast and the operator station is provided with an overhead guard pivotally mounted to the upper end of the mast. The overhead guard includes a pair of arms pivotally secured on a transverse axis to the mast permitting pivotal movement of the overhead guard to an upright position wherein the guard is vertically aligned with the mast and is out of the way of the battery when the battery is lifted from the battery compartment by an overhead crane or the like. The transverse spacing of the arms may be adjusted so that the overhead guard can be attached to masts of different widths. This is achieved by releasable fastening members interconnecting the arms and the grill of the guard. Additionally the grill is shiftable longitudinally of the arms so as to extend farther to the rear of a truck. A pair of reinforcing plates are welded to the top of the arms in a manner keeping the grill in loose assembly with the arms thus preventing disassociation of the parts when stored or shipped as a replacement unit. A pair of spaced abutments are provided on the mast for each arm whereby any substantial vertical loading of the overhead guard will be carried by the abutments rather than by the pivot member of the pivotal connection between the overhead guard and the mast.
Inventors
- 👤 C Mecklenburg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:15
CPC Classifications
B; B66; B66F; B66F9/00; B66F9/06; B66F9/075; B66F9/07545; B60; B60L; B60L50/00; B60L50/50; B60L50/60; B60L50/66; B60L53/00; B60L53/80; B66F9/08; B66F9/087; B60L2200/00; B60L2200/40; B60L2200/42; B60Y; B60Y2200/00; B60Y2200/10; B60Y2200/15; B62; B62B; B62B5/00; B62B5/0026; B62B5/0033; B62B5/0053; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/70; Y02T10/7072; Y02T90/00; Y02T90/10; Y02T90/12; Y02T90/14; Y10; Y10S; Y10S414/00; Y10S414/127
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
234 words
In an electric lift truck the combination comprising: a load carriage, a lift mast mounted on the front end of said truck and mounting said load carriage for reciprocal vertical movement relative thereto, an operator''s station at the rear end of said truck, a top opening battery compartment intermediate said mast and said operator''s station, an overhead guard for the operator''s station including a guard grill, and a pair of longitudinally extending cantilever arms supporting said grill and having front ends disposed on the laterally outer sides of said mast, pivot means pivotally connecting said arms to the top of said mast on a transverse pivot axis for swinging movement from a normal horizontal position above said operator''s station to an upright position above said mast in which position a battery may be lifted and removed from said battery compartment without interference with said guard, and cooperable abutments on said mast and arms, respectively, operable on abutment to prevent downward swinging movement of said arms below said horizontal position, said abutments permitting upward swinging movement of said arms and being disposed forwardly of said battery compartment and operator''s station so as not to interfere with lifting and removal of said battery, whereby the mounting of said guard on said mast allows the uppermost portion of said carriage to be elevated above said pivot means without interference with said overhead guard or said pivot meAns.
Claim 2
Dependent Claim
234 words
In an electric lift truck the combination comprising: a load carriage, a lift mast mounted on the front end of said truck and mounting said load carriage for reciprocal vertical movement relative thereto, an operator''s station at the rear end of said truck, a top opening battery compartment intermediate said mast and said operator''s station, an overhead guard for the operator''s station including a guard grill, and a pair of longitudinally extending cantilever arms supporting said grill and having front ends disposed on the laterally outer sides of said mast, pivot means pivotally connecting said arms to the top of said mast on a transverse pivot axis for swinging movement from a normal horizontal position above said operator''s station to an upright position above said mast in which position a battery may be lifted and removed from said battery compartment without interference with said guard, and cooperable abutments on said mast and arms, respectively, operable on abutment to prevent downward swinging movement of said arms below said horizontal position, said abutments permitting upward swinging movement of said arms and being disposed forwardly of said battery compartment and operator''s station so as not to interfere with lifting and removal of said battery, whereby the mounting of said guard on said mast allows the uppermost portion of said carriage to be elevated above said pivot means without interference with said overhead guard or said pivot meAns.
Claim 3
Dependent Claim
53 words
The structure of claim 1 and further comprising fastening means releasably securing said arms to said grill, said arms, grill and fastening means being constructed so as to permit said arms to be connected to said grill at different transverse spacing so that the guard may be optionally mounted on different width masts.
Claim 4
Dependent Claim
78 words
The structure of claim 1 wherein each of said arms includes a transversely opening and longitudinally elongated window, said grill includes a transverse member extending through said windows and having a longitudinal dimension which is less than the longitudinal length of said windows, thereby permitting longitudinal adjustment of said grill relative to said arms and further comprising releasable fastening means releasably securing said grill in one of a plurality of positions of longitudinal adjustment relative to said arms.
Claim 5
Dependent Claim
27 words
The structure of claim 3 wherein said windows and transverse member are operable to maintain said grill and arms in assembly when said fastening means are released.
Claim 6
Dependent Claim
37 words
The structure of claim 1 wherein said mast includes a pair of laterally spaced uprights and said cooperable abutments include a pair of spaced abutments on each of said uprights engageable with confronting abutments on said arms.
Claim 7
Dependent Claim
47 words
The structure of claim 5 and further comprising cooperating stops on said overhead guard and mast operable to limit swinging movement of said overhead guard when the latter is pivoted to an upright position above said mast and to maintain said overhead guard in said upright position.
Claim 8
Dependent Claim
20 words
The structure of claim 5 wherein said pair of spaced abutments are on longitudinally opposite sides of said pivot means.
Claim 9
Dependent Claim
55 words
The structure of claim 7 wherein said spaced abutment at the front of said pivot means faces downwardly and said spaced abutment at the rear of said pivot means faces upwardly whereby said abutments carry substantially all of the vertical loading which may be imposed on said overhead guard by falling cargo or the like.
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) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |