US3774935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pitch suppressing system
Assignee: Motors Liquidation Co
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Filing: 1972-06-08
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Granted: 1973-11-27
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Expires: 1992-06-08
Abstract
Abstract A system for suppressing forward pitching of the sprung mass portion of a vehicle during braking maneuvers, the system including a cylinder connected to the vehicle sprung mass, a rod connected to the unsprung mass and having a piston thereon slidable within the cylinder, a conduit between the chambers of the cylinder defined by the piston, a working fluid in the chambers and the conduit, an electrically actuated valve in the conduit for blocking the latter, and a switch responsive to operation of the vehicles''s service brake for actuating the valve, the valve being operative when actuated by the switch to prevent fluid flow through the conduit between the chambers thereby to lock the cylinder and rod for suppressing relative movement between the sprung and the unsprung mass portions.
Inventors
- 👤 F Aldrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:26
CPC Classifications
B; B60; B60G; B60G17/00; B60G17/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
391 words
In a vehicle including an unsprung mass portion, a sprung mass portion supported on said unsprung mass portion for jounce and rebound deflection relative to the latter, a service brake system, and a manually operable control member associated with said brake system for selectively actuating the latter to arrest traversing motion of said vehicle, the improvement comprising, a cylinder member connected to one of said sprung and said unsprung mass portions, a rod slidably disposed on said cylinder member and extending axially of said cylinder member and completely therethrough, means connecting said rod to the other of said sprung and said unsprung mass portion so that jounce and rebound deflections therebetween effects sliding movement of said rod relative to said cylinder member, a piston rigidly attached to said rod and slidably disposed within said cylinder member, said piston dividing said cylinder member into a pair of unconnected variable volume chambers adapted for alternate expansion and contraction in response to relative movement between said piston and said cylinder member, a first conduit remote from said piston for effecting communication between said variable volume chambers, a second conduit remote from said piston for effecting communication between said variable volume chambers, an incompressible working fluid disposed in said variable volume chambers and in each of said first and said second conduits, said working fluid being pumped between said chambers in parallel paths through said first and second conduits in response to movement of said piston relative to said cylinder member, electrically operable valve means disposed in said first conduit and actuable between an open condition and a closed condition terminating communication between said variable volume chambers through said first conduit, a source of electrical potential, circuit means between said source and said valve means including a switch responsive to operation of said control member for effecting actuation of said valve means to the closed condition thereof when said brake system is actuated, and a check valve disposed in said second conduit for permitting flow of said working fluid between said variable volume chambers independently of said first conduit during deflection between said sprung and said unsprung mass portion in one of the jounce and rebound modes and for preventing such flow through said second conduit during deflection between said sprung and said unsprung mass portion in the other of the jounce and rebound modes.
Claim 2
Dependent Claim
391 words
In a vehicle including an unsprung mass portion, a sprung mass portion supported on said unsprung mass portion for jounce and rebound deflection relative to the latter, a service brake system, and a manually operable control member associated with said brake system for selectively actuating the latter to arrest traversing motion of said vehicle, the improvement comprising, a cylinder member connected to one of said sprung and said unsprung mass portions, a rod slidably disposed on said cylinder member and extending axially of said cylinder member and completely therethrough, means connecting said rod to the other of said sprung and said unsprung mass portion so that jounce and rebound deflections therebetween effects sliding movement of said rod relative to said cylinder member, a piston rigidly attached to said rod and slidably disposed within said cylinder member, said piston dividing said cylinder member into a pair of unconnected variable volume chambers adapted for alternate expansion and contraction in response to relative movement between said piston and said cylinder member, a first conduit remote from said piston for effecting communication between said variable volume chambers, a second conduit remote from said piston for effecting communication between said variable volume chambers, an incompressible working fluid disposed in said variable volume chambers and in each of said first and said second conduits, said working fluid being pumped between said chambers in parallel paths through said first and second conduits in response to movement of said piston relative to said cylinder member, electrically operable valve means disposed in said first conduit and actuable between an open condition and a closed condition terminating communication between said variable volume chambers through said first conduit, a source of electrical potential, circuit means between said source and said valve means including a switch responsive to operation of said control member for effecting actuation of said valve means to the closed condition thereof when said brake system is actuated, and a check valve disposed in said second conduit for permitting flow of said working fluid between said variable volume chambers independently of said first conduit during deflection between said sprung and said unsprung mass portion in one of the jounce and rebound modes and for preventing such flow through said second conduit during deflection between said sprung and said unsprung mass portion in the other of the jounce and rebound modes.
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) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |