US3916499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic bearing mounting press
Assignee: Chambersburg Engineering Co
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Filing: 1975-01-09
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Granted: 1975-11-04
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Expires: 1995-01-09
Abstract
Abstract Two opposing hydraulic rams simultaneously drive bearings onto bearing seats at opposite ends of an axle assembly on which wheels inside the bearing seats are already in place. Wheel support dollies initially position and support the wheel and axle assembly between the opposing rams. The rams are adjusted vertically to opposed positions concentric with the axle. As the rams act upon the bearings, the axle and its supporting dollies can move axially off its center position if greater resistance is encountered in mounting one bearing than in mounting the other. Sensing means mounted on the wheel support dollies monitor the movement of the axle and stop the flow of driving fluid to the ram which has pushed the axle off center until the opposite ram recenters the axle.
Inventors
- 👤 Charles W Frame
- 👤 Jack A Rickrode
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:33
CPC Classifications
B; B23; B23P; B23P19/00; B23P19/02; B23P19/021; B23P19/027; F; F16; F16C; F16C35/00; F16C35/04; F16C35/06; F16C35/063; F16C2326/00; F16C2326/10; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53039; Y10T29/53061; Y10T29/53078; Y10T29/53796; Y10T29/53826; Y10T29/5383
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
175 words
A hydaulic press for simultaneously mounting bearing on bearing seats at opposite ends of an axle comprising: a supporting frame, opposing cylinders mounted on said frame, hydraulic rams in each cylinder movable toward the other to engage and position an axle between them, in a predetermined position, each ram having means for supporting the bearing concentric with the seat of said axle and further means relatively movable with respect to each said ram for driving the respective bearing from said supporting means onto their respective adjacent axle bearing seat, fluid sealing means between the cylinder and rams, fluid supply means for supplying fluid to each of said cylinders to drive said rams toward one another, means for sensing axial displacement of said axle from its center position as a result of one bearing requiring more force to be driven into place than the other, and means responsive to said sensingn means for causing unequal pressure to be applied to said cylinders to drive said axle bearings onto said axle beaRing seats and recenter said axle.
Claim 2
Dependent Claim
175 words
A hydaulic press for simultaneously mounting bearing on bearing seats at opposite ends of an axle comprising: a supporting frame, opposing cylinders mounted on said frame, hydraulic rams in each cylinder movable toward the other to engage and position an axle between them, in a predetermined position, each ram having means for supporting the bearing concentric with the seat of said axle and further means relatively movable with respect to each said ram for driving the respective bearing from said supporting means onto their respective adjacent axle bearing seat, fluid sealing means between the cylinder and rams, fluid supply means for supplying fluid to each of said cylinders to drive said rams toward one another, means for sensing axial displacement of said axle from its center position as a result of one bearing requiring more force to be driven into place than the other, and means responsive to said sensingn means for causing unequal pressure to be applied to said cylinders to drive said axle bearings onto said axle beaRing seats and recenter said axle.
Claim 3
Dependent Claim
27 words
The hydraulic press of claim 1 in which the means causing unequal pressure to the cylinders employs means to selectively reduce flow to either of the cylinders.
Claim 4
Dependent Claim
30 words
The hydraulic press of claim 2 in which the means to selectively reduce flow includes valve means associated with each of the cylinders to modify flow to its associated cylinder.
Claim 5
Dependent Claim
88 words
The hydraulic press of claim 1 in which the relatively movable members of the rams are relatively slidable pieces, stop means are provided to limit relative movement and spring means is provided between said slidable pieces urging them apart and into said stop means such that hydraulic fluid will drive the ram pieces as a unit until an axle is engaged and then will urge further movement to drive bearings into place be movement of one sliding member relative to the other in opposition to said spring means.
Claim 6
Dependent Claim
29 words
The hydraulic press of claim 4 in which the spring means are compressions springs compressed between the relatively slidable ram members as the bearings are driven onto the seats.
Claim 7
Dependent Claim
59 words
The hydraulic press of claim 3 in which the means for sensing axial displacement of said axle from the center position employs at least a pair of each switch means actuable upon a predetermined displacement of said axle in a different axial direction so that actuation of one of the switches provides an indication of the direction of displacement.
Claim 8
Dependent Claim
51 words
The hydraulic press of claim 6 in which the switch means includes a pair of electrical limit switches positioned to be actuated by the axle or switch is movable with the axle one of which actuable for displacement in one axial direction and the other for displacement in the other direction.
Claim 9
Dependent Claim
65 words
The hydraulic press of claim 7 in which an electrical circuit is employed to operate one or the other of said valves in response to actuation of one or the other of said limit switches, each of which is associated with one of said valves, whereby actuation of one of said limit switches causes its respective valve means to modify flow to its associated cylinder.
Claim 10
Dependent Claim
22 words
The hydraulic press of claim 8 in which each valve means is arranged to cut off flow entirely to its associated cylinder.
Claim 11
Dependent Claim
33 words
The hydraulic press of claim 3 including elevator means engaged with said cylinders for vertically moving said cylinders to a position in which said bearings are coaxial with the seats of said axle.
Claim 12
Dependent Claim
18 words
The hydraulic press of claim 10 in which vertical sensing means for sensing vertical displacement of the cylinder.
Claim 13
Dependent Claim
40 words
The hydraulic means of claim 11 in which the sensing means include at least means is provided responsive to said vertical sensing means for causing said elevator means to stop movement at predetermined extreme upper or extreme lower vertical position.
Claim 14
Dependent Claim
54 words
The hydraulic press of claim 3 including means for sensing the axial displacement of the rams to a predetermined extreme extended or extreme retracted position, including means responsive to said mean for sensing the axial displacement of the rams, to cause said valve means to cut off said flow to both of said cylinders.
Claim 15
Dependent Claim
41 words
The hydraulic press of claim 4 in which the slidable piece enging the axle has an abutment ring surrounding said slidable piece and driven by the other slidable piece, said abutment ring contacting and driving a bearing onto said bearing seat.
Claim 16
Dependent Claim
53 words
They hydraulic press of claim 1 in which the means for sensing displacement of said axle from the center position includes means respectively movable with the axle and fixed to the frame whereby displacement of said axle along its axis predetermined amounts from the center position will cause actuation of said sensing means.
Claim 17
Dependent Claim
44 words
The hydraulic press of claim 15 in which the sensing means includes a pair of switch elements one actuated upon movement of the axle a predetermined distance in one direction and the other actuated upon movement of a predetermined distance in the opposite direction.
Claim 18
Dependent Claim
27 words
The hydraulic press of clAim 16 in which the switch elements are supported from the frame and are actuated by movement of structure movable with the axle.
Claim 19
Dependent Claim
49 words
The hydraulic press of claim 9 for use with wheel sets, in which wheel set dollies are employed to support the wheels while the axle is in the press and said wheel dollies are movable in the axial direction wherein the structure of the wheel dollies contacts the switches.
Claim 20
Dependent Claim
82 words
The hydraulic press of claim 1 having a wheel set with a pair of wheels and said axle, and a pair of wheel support dollies for supporting said wheels and positioning said axle between said opposing rams, in which the means for sensing displacement of said axle from the center position is a pair of limit switches one of which will be actuated by one of said wheel support dollies for each direction of axial displacement of the axle along its axis.
Claim 21
Dependent Claim
46 words
The hydraulic press of claim 1 in which the rams relatively movable members are relatively slidable and in which the supporting means consists of a slidable piece engaging said axle and providing a bearing supporting member coaxial with and adjacent to the axle bearing support surface.
Claim 22
Dependent Claim
68 words
The hydraulic press of claim 1 for an axle in a wheel set having a least a pair of wheels and wheel support dolly means for supporting said wheels, an unloading means onto which said wheel set is discharged from said dolly means, a wheel set discharge means having a ram positioned to push said wheel set from said support dolly means and means to actuate said ram.
Claim 23
Dependent Claim
62 words
The hydraulic press in claim 13 in which said wheel support dolly means consists of a pair of wheel support dollies, one to support each wheel, and in which the ram is actuated by a hydraulic cylinder, and in which said unloading means is a pair of rails positioned to receive the wheels of the wheel set is discharged from said dollies.
Claim 24
Dependent Claim
120 words
The hydraulic press in claim 1 for an axle in a wheel set having at least a pair of wheels on said axle, a pair of wheel support dollies for supporting said wheels, a set of loading rails from which said wheel set is loaded onto said support dollies, a set of unloading rails onto which said wheel set is unloaded from said dollies, a vertically oriented barrier plunger providing a safety latch means for preventing a wheel set which has entered the support dollies from said loading rails with excessive speed from continuing onto said unloading rails, said barrier plunger being retractable from the path of the wheel set to permit discharge of the wheel set from the dollies.
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) | 1978-11-03 | 1979-05-05 | 1979-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-03 | 1983-05-05 | 1983-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-03 | 1987-05-05 | 1987-11-04 | $7700.00 | Window Closed / Lapsed |