Patent US3749207A successfully refreshed from Google Patents.
US3749207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seat brake with toggle linkage
Assignee: AC MATERIAL HANDLING Corp 777 MANOR PARK DRIVE COLUMBUS OHIO 43228 A CORP OHIO
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Filing: 1972-03-01
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Granted: 1973-07-31
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Expires: 1992-03-01
Abstract
Abstract The operating linkage of a dead-man seat brake includes a toggle with an in-line or centered position in the brake released position of the linkage wherein the force exerted by the rather large brake applying spring is isolated from the operator''s seat. A relatively weak spring biases the seat upwardly to break the in-line position of the toggle when the operator vacates the seat.
Inventors
- 👤 T Meyer
- 👤 M Boyajian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:55
CPC Classifications
B; B60; B60T; B60T7/00; B60T7/12
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
177 words
A seat brake system for a vehicle comprising: a vehicle brake including an operating element shiftable between brake applied and brake released positions, and a brake actuating spring operable to move said element to its brake applied position, a vertically movable seat shiftable between raised and lowered positions, and a linkage interconnecting said seat and lever including a toggle having pivotally interconnected links shiftable from a relatively angularly disposed position in which said brake lever is in its brake applied position to a substantially inline position in which said lever is in its brake released position and the force of said brake actuating spring is substantially isolated from said seat, force transmitting means between said seat and said toggle operable to shift said toggle from its angularly disposed position to its in-line position upon said seat shifting from its raised position to its lowered position, and spring means operatively associated with said seat and toggle to move said seat upwardly from its lowered position and said toggle out of its in-line position when said seat is vacated.
Claim 2
Dependent Claim
177 words
A seat brake system for a vehicle comprising: a vehicle brake including an operating element shiftable between brake applied and brake released positions, and a brake actuating spring operable to move said element to its brake applied position, a vertically movable seat shiftable between raised and lowered positions, and a linkage interconnecting said seat and lever including a toggle having pivotally interconnected links shiftable from a relatively angularly disposed position in which said brake lever is in its brake applied position to a substantially inline position in which said lever is in its brake released position and the force of said brake actuating spring is substantially isolated from said seat, force transmitting means between said seat and said toggle operable to shift said toggle from its angularly disposed position to its in-line position upon said seat shifting from its raised position to its lowered position, and spring means operatively associated with said seat and toggle to move said seat upwardly from its lowered position and said toggle out of its in-line position when said seat is vacated.
Claim 3
Dependent Claim
32 words
The structure of claim 1 and further comprising means preventing said toggle from being moved substantially Past its in-line position when it is moved from its angular position to its in-line position.
Claim 4
Dependent Claim
20 words
The structure of claim 1 wherein said force transmitting means includes a force transmitting link interconnecting said seat and toggle.
Claim 5
Dependent Claim
21 words
The structure of claim 3 wherein said spring means acts against said member to bias said seat toward its raised position.
Claim 6
Dependent Claim
32 words
The structure of claim 4 and further comprising means preventing said toggle from being moved substantially past its in-line position when it is moved from its angular position to its in-line position.
Claim 7
Dependent Claim
40 words
The structure of claim 1 wherein one of said links of said toggle includes a free end portion extending a substantial distance from the interconnection between said links and wherein said force transmitting means is connected to said free end.
Claim 8
Dependent Claim
29 words
The structure of claim 1 wherein said force transmitting means includes an upstanding link and said spring means urges said link in a direction to effect raising said seat.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |