US3825167A
Expired / Lapsed
US
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Expanding mandrel or chuck
Assignee: Individual
•
Filing: 1972-12-26
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Granted: 1974-07-23
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Expires: 1992-12-26
Abstract
Abstract This invention pertains to an expanding mandrel or chuck in which air or hydraulic fluid is fed to and into a resilient tube arranged in a helical spiral. This tube is carried by and in grooves formed in a body and when pressurized air is fed into the tube it is expanded in a controlled manner to move three longitudinally disposed and retained jaws outwardly to positively drive a supported member carried on the chuck. In an alternate arrangement the jaws are made smooth to provide a controlled torque shaft which, with fixed retaining collars, provide a differential rewind shaft.
Inventors
- 👤 L Damour
- 👤 A Komorek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:14
CPC Classifications
B; B23; B23B; B23B31/00; B23B31/02; B23B31/24; B23B31/30; B23B31/305; B65; B65H; B65H75/00; B65H75/02; B65H75/18; B65H75/24; B65H75/242; B65H75/243; B65H75/2437; Y; Y10; Y10T; Y10T279/00; Y10T279/10; Y10T279/1021; Y10T279/1024; Y10T279/12; Y10T279/1274; Y10T279/1283
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
322 words
An expanding mandrel, chuck, rewind and the like for transmitting torque forces in which an expanding member is actuated by air, hydraulic fluid and the like, said mandrel including: (a) an elongated body member having end portions of a determined diameter and between these end portions having an intermediate portion having a lateral surface formed with a helical groove; (b) a transverse passageway formed in one end portion, said passageway extending from this end portion inwardly to the helical groove; (c) a resilient tube mounted in said groove with one end of the tube fed to and into the transverse passageway to provide external access to the end of the tube and with the other end of the tube closed by means providing a fluid tight seal; (d) a plurality of longitudinally disposed movable members carried by and on the intermediate portion of the body, the underside of the movable members being in local contact with portions of the top surface of the resilient tube; (e) a plurality of fixed retaining members having longitudinal edges positioned in a determined array about and removably secured to the intermediate portion of the body after the tube has been mounted in the helical groove, the retaining members formed and positioned to engage and retain the remaining outer surface portions of the mounted resilient tubing, said retaining members having their longitudinal edges adapted to engage the edges of the movable members so as to cooperatively limit the outward movement of said movable members while at the same time transmitting the developed torque forces to and from the movable members to the retaining members and the body, and (f) a fluid conductive and connecting means cooperatively associated with the inlet end of the resilient tube, said conductive means permitting selective filling and discharge of pressurized air, fluid and the like to the helically arranged resilient tube to cause responsive outward and inward movement of the movable members.
Claim 2
Dependent Claim
322 words
An expanding mandrel, chuck, rewind and the like for transmitting torque forces in which an expanding member is actuated by air, hydraulic fluid and the like, said mandrel including: (a) an elongated body member having end portions of a determined diameter and between these end portions having an intermediate portion having a lateral surface formed with a helical groove; (b) a transverse passageway formed in one end portion, said passageway extending from this end portion inwardly to the helical groove; (c) a resilient tube mounted in said groove with one end of the tube fed to and into the transverse passageway to provide external access to the end of the tube and with the other end of the tube closed by means providing a fluid tight seal; (d) a plurality of longitudinally disposed movable members carried by and on the intermediate portion of the body, the underside of the movable members being in local contact with portions of the top surface of the resilient tube; (e) a plurality of fixed retaining members having longitudinal edges positioned in a determined array about and removably secured to the intermediate portion of the body after the tube has been mounted in the helical groove, the retaining members formed and positioned to engage and retain the remaining outer surface portions of the mounted resilient tubing, said retaining members having their longitudinal edges adapted to engage the edges of the movable members so as to cooperatively limit the outward movement of said movable members while at the same time transmitting the developed torque forces to and from the movable members to the retaining members and the body, and (f) a fluid conductive and connecting means cooperatively associated with the inlet end of the resilient tube, said conductive means permitting selective filling and discharge of pressurized air, fluid and the like to the helically arranged resilient tube to cause responsive outward and inward movement of the movable members.
Claim 3
Dependent Claim
97 words
An expanding mandrel as in claim 1 in which the transverse passageway includes a stepped hole in which is removably retained a plug having a passageway therethrough and an outer tapered surface onto which the end of the resilient tubing is mounted and onto this mounted end of the tubing is applied a cooperatively tapered sleeve member which engages and compresses the tubing to retain the tubing end to the plug in a fluid tight manner, said plug connected to a valve plug member through which air, fluid and the like may be fed to the tubing.
Claim 4
Dependent Claim
62 words
An expanding mandrel as in claim 2 in which the valve plug member is connected to the tapered plug to provide a unitary member, this valve plug member and tapered plug combination sized so as to be a sliding fit in a shouldered bore in the transverse passageway and there is provided means for removably locking this combination in the transverse passageway.
Claim 5
Dependent Claim
51 words
An expanding mandrel as in claim 3 in which the means for locking the valve and tapered plug combination in the transverse passageway is a screw which enters and is retained in cooperative threaded portions on the outer surface of the plug and in the inner surface of the shouldered Bore.
Claim 6
Dependent Claim
58 words
An expanding mandrel as in claim 1 in which the means for closing the distal end of the tube is a U-shaped clamp which receives and engages a folded end of the tube and when the clamp jaws are moved toward each other they grip and squeeze the folded end of the tube into a pressure tight seal.
Claim 7
Dependent Claim
52 words
An expanding mandrel as in claim 1 in which the means for closing the distal end of the tube is a resilient plug inserted into the tube end and a circular clamp tightened on the outside of the resilient tube to grip the tube to the plug in a pressure tight manner.
Claim 8
Dependent Claim
25 words
An expanding mandrel as in claim 1 in which the resilient tube is of rubber having a low durometer such as 25 to 40 durometer.
Claim 9
Dependent Claim
56 words
An expanding mandrel as in claim 1 in which the retaining members have their outer longitudinal edges formed with extending ear portions and the movable members are jaws having their inner longitudinal edges formed with extending shoulder portions which engage the ear portions of the retaining members to limit the outward movement of the movable jaws.
Claim 10
Dependent Claim
55 words
An expanding mandrel as in claim 8 in which the movable jaws are provided with external ribs having flat outer surfaces which flat surfaces are disposed to engage the inside of a supported member which is a roll, core and the like without damage thereto while this member is supported and driven by the mandrel.
Claim 11
Dependent Claim
137 words
An expanding mandrel as in claim 1 in which the mandrel includes a differential rewind shaft on which the movable members are formed and retained with their outward core engaging portions comprising smooth arcuate surfaces which provide slip surfaces on which inner diameter portions of core sections may be carried; these core sections are retained against excessive longitudinal movement by collar members carried by and rotated with the shaft, said collar members having relief portions which provide passageways enabling in and out movement of the movable members to take place in response to pressure changes within the resilient tube, the selected extent of pressure in the tube and corresponding thrust of the movable members against the inner surfaces of the core sections establishing the effective torque to be transmitted from the movable members to the core sections.
Claim 12
Dependent Claim
47 words
An expanding mandrel as in claim 10 in which the collar members are removably secured to the shaft by screw means carried in threaded holes extending from the outer surface to an inner diameter which is sized so as to be slidable on the fixed retaining members.
Claim 13
Dependent Claim
62 words
An expanding mandrel as in claim 10 in which the fluid conductive and connecting means is a centrally positioned inlet formed in a journal portion provided at one end of the shaft, said inlet being connected to a transverse passageway so as to permit the resilient tube to be brought from one end of the helical groove to the centrally positioned inlet.
Claim 14
Dependent Claim
42 words
An expanding mandrel as in claim 10 in which there are not less than three movable members, each having its outer longitudinal edges rounded so as to preclude unwanted engagement with a core member as the core member is rotated relative thereto.
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) | 1977-07-22 | 1978-01-21 | 1978-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-22 | 1982-01-21 | 1982-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-22 | 1986-01-21 | 1986-07-23 | $7700.00 | Window Closed / Lapsed |