US3577833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid cylinder
Assignee: Milwaukee Cylinder Corp
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Filing: 1969-07-11
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Granted: 1971-05-04
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Expires: 1989-07-11
Abstract
Abstract A fluid cylinder having an end cap and a retainer plate for the end cap for containing packing thereby permitting a simplified bushing to be inserted in the end cap insuring that the entire bearing surface of the bushing is lubricated.
Inventors
- 👤 Darold M Skelton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:04
CPC Classifications
F; F16; F16J; F16J10/00; F16J10/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
155 words
In a fluid cylinder of the type having a bore in which a piston is axially slideable, said piston having an attached rod, an end cap rigidly secured at one end of said cylinder, said end cap having a counterbore, a bushing inserted in said counterbore, said bushing having an internal surface for engagement by said piston rod, a retainer plate adapted to be secured on the end of said end cap and adjacent said bushing, said retainer plate having an internal counterbore and an axial flange at the outer end thereof, packing means located in said counterbore of said retainer plate and between said flange and said bushing whereby said packing means is contained within said retainer plate so as to be in sealing relationship with said piston rod, said retainer plate having another counterbore, and said bushing is of generally rectangular cross-sectional shape and extends into said another counterbore in said retainer plate.
Claim 2
Dependent Claim
155 words
In a fluid cylinder of the type having a bore in which a piston is axially slideable, said piston having an attached rod, an end cap rigidly secured at one end of said cylinder, said end cap having a counterbore, a bushing inserted in said counterbore, said bushing having an internal surface for engagement by said piston rod, a retainer plate adapted to be secured on the end of said end cap and adjacent said bushing, said retainer plate having an internal counterbore and an axial flange at the outer end thereof, packing means located in said counterbore of said retainer plate and between said flange and said bushing whereby said packing means is contained within said retainer plate so as to be in sealing relationship with said piston rod, said retainer plate having another counterbore, and said bushing is of generally rectangular cross-sectional shape and extends into said another counterbore in said retainer plate.
Claim 3
Dependent Claim
23 words
A device as set forth in claim 1 including spring means in said end cap counterbore for holding said packing in sealing relationship.
Claim 4
Dependent Claim
169 words
A fluid cylinder having a piston slideable therein, said piston having an attached rod, an end cap rigidly secured at one end of said cylinder, said end cap having a central counterbore at its end opposite said cylinder, a ring bushing of generally rectangular cross section and inserted in said counterbore, said bushing having an internal cylindrical surface for engagement by said piston rod, a retainer plate adapted to be secured on the end of said end cap at said end opposite said cylinder, said retainer plate having an internal counterbore and an axial flange at the outer end thereof, packing means located in said counterbore of said retainer plate, said retainer plate having a second counterbore, said bushing extending into said second counterbore of said retainer plate, spring means in said end cap counterbore and between said packing and bushing for holding said packing in sealing relationship, whereby said packing means is contained within said retainer plate so as to be in sealing relationship with said piston rod.
Claim 5
Dependent Claim
169 words
A fluid cylinder having a piston slideable therein, said piston having an attached rod, an end cap rigidly secured at one end of said cylinder, said end cap having a central counterbore at its end opposite said cylinder, a ring bushing of generally rectangular cross section and inserted in said counterbore, said bushing having an internal cylindrical surface for engagement by said piston rod, a retainer plate adapted to be secured on the end of said end cap at said end opposite said cylinder, said retainer plate having an internal counterbore and an axial flange at the outer end thereof, packing means located in said counterbore of said retainer plate, said retainer plate having a second counterbore, said bushing extending into said second counterbore of said retainer plate, spring means in said end cap counterbore and between said packing and bushing for holding said packing in sealing relationship, whereby said packing means is contained within said retainer plate so as to be in sealing relationship with said piston rod.
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) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |