Patent US3782234A successfully refreshed from Google Patents.
US3782234A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gripping shaft
Assignee: UNGERER I DT
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Filing: 1971-12-03
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Granted: 1974-01-01
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Expires: 1991-12-03
Abstract
Abstract A clamping shaft for clamping a rotating element comprises a generally closed tubular core having an inlet adapted to be connected to a pressure fluid source, and radial bore means communicating with said inlet and open on the outside peripheral surface of said core. The shaft also comprises an expansible clamping sleeve enclosing the outside peripheral surface of said core and firmly and tightly joined thereto at least at two spaced-apart portions of its length to define around said core at least one annular space, which communicates with said radial bore means.
Inventors
- 👤 A Rodach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:53
CPC Classifications
B; B26; B26D; B26D7/00; B26D7/26; B26D7/2614; B26D7/2621; B23; B23D; B23D35/00; B23D35/002; B23D35/004; Y; Y10; Y10T; Y10T83/00; Y10T83/768; Y10T83/7809; Y10T83/783; Y10T83/7834; Y10T83/929; Y10T83/9372; Y10T83/9377; Y10T83/9457; Y10T83/9464
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
153 words
A clamping shaft for clamping a rotatable element therearound comprising a closed tubular core provided with an inlet communicating with a source of fluid pressure, the outer surface of said core having at least one annular recess between the ends thereof, said core also having a plurality of passages extending radially from the inside to the at least one annular recess of said tubular core, and an expansible clamping sleeve surrounding said tubular core and being firmly and tightly secured to at least two axially spaced unrecessed portions of said core to enclose said at least one recess on the outer surface of said core to form therewith at least one closed, annular space, whereby when fluid pressure is introduced into said tubular core and into said annular space through said radial passages, said expansible sleeve will expand sufficiently to clamp the rotatable element in a desired, fixed position on said tubular core.
Claim 2
Dependent Claim
153 words
A clamping shaft for clamping a rotatable element therearound comprising a closed tubular core provided with an inlet communicating with a source of fluid pressure, the outer surface of said core having at least one annular recess between the ends thereof, said core also having a plurality of passages extending radially from the inside to the at least one annular recess of said tubular core, and an expansible clamping sleeve surrounding said tubular core and being firmly and tightly secured to at least two axially spaced unrecessed portions of said core to enclose said at least one recess on the outer surface of said core to form therewith at least one closed, annular space, whereby when fluid pressure is introduced into said tubular core and into said annular space through said radial passages, said expansible sleeve will expand sufficiently to clamp the rotatable element in a desired, fixed position on said tubular core.
Claim 3
Dependent Claim
16 words
A clamping shaft as claimed in claim 1 wherein said clamping sleeve consists of a metal.
Claim 4
Dependent Claim
33 words
A clamping shaft as claimed in claim 1 wherein the outer surface of said closed tubular core is provided with at least one longitudinal recess communicating with the at least one annular recess.
Claim 5
Dependent Claim
36 words
A clamping shaft as claimed in claim 3 wherein at least one of said radial passages communicates with a point of intersection of the at least one annular recess and the at least one longitudinal recess.
Claim 6
Dependent Claim
42 words
A clamping shaft as claimed in claim 3 wherein the outer surface of said closed tubular core is provided with annular flutes parallel to and spaced from said at least one annular recess and communicating with the at least one longitudinal recess.
References Cited (Backward Citations)
DE1038902B
Cited
US2801694A
Cited
US3073198A
Cited
GB870927A
Cited
US3173325A
Cited
US3422714A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |