Patent US3276758A successfully refreshed from Google Patents.
Patent US3955249A successfully refreshed from Google Patents.
US3955249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clamping device
Assignee: Individual
•
Filing: 1974-07-02
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Granted: 1976-05-11
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Expires: 1994-07-02
Abstract
Abstract A clamping device especially adapted for use with an automotive body or frame straightening device is disclosed wherein at least two clamping members each having a clamping jaw section at one end thereof and a clamping guide section at the other end thereof are held together by a retaining ring in such a manner that they may pivot about a ball disposed inwardly thereof, and within the space defined by the clamping guide sections is disposed a tapered member which has an outwardly tapered outer peripheral surface. When the tapered member is drawn or pulled outwardly, its tapered outer surface forces the clamping guide sections to move away from each other while forcing the clamping jaw sections to move toward each other, whereby the strong clamping force is produced.
Inventors
- 👤 Hiromitsu Shiozaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 23:04
CPC Classifications
B; B66; B66C; B66C1/00; B66C1/10; B66C1/42; B66C1/44; B66C1/48; B21; B21D; B21D1/00; B21D1/14; B21D1/145; B21D25/00; B21D25/04; Y; Y10; Y10S; Y10S72/00; Y10S72/705; Y10T; Y10T24/00; Y10T24/44; Y10T24/44291; Y10T24/44376; Y10T24/44385; Y10T24/44402; Y10T24/4441; Y10T24/44427
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
216 words
A clamping device comprising a. at least two clamping members each having a clamping jaw section at one end thereof and a clamping guide section at the other end thereof; b. an inner fulcrum member positioned between and supporting said clamping members so as to enable said clamping members to pivot about said inner fulcrum member, said inner fulcrum member also being positioned between the ends of each of said clamping members; c. an outer retaining ring surrounding and supporting said clamping member at positions diametrically opposed to that of said inner fulcrum member so as to pivotally retain said clamping members with respect to said inner fulcrum member; d. a tapered member disposed within a space defined by and located between said clamping guide sections of said clamping members, said member having a tapered outer peripheral surface arranged such that when said tapered member is displaced to move said tapered outer peripheral surface into contact with inner surfaces of said clamping guide sections, said clamping guide sections are moved away from each other thereby forcing said clamping jaw sections to move toward each other by pivotal movement of said clamping members about said inner fulcrum member, the clamping force at said clamping jaw sections being increased as the displacement of said tapered member is increased.
Claim 2
Dependent Claim
216 words
A clamping device comprising a. at least two clamping members each having a clamping jaw section at one end thereof and a clamping guide section at the other end thereof; b. an inner fulcrum member positioned between and supporting said clamping members so as to enable said clamping members to pivot about said inner fulcrum member, said inner fulcrum member also being positioned between the ends of each of said clamping members; c. an outer retaining ring surrounding and supporting said clamping member at positions diametrically opposed to that of said inner fulcrum member so as to pivotally retain said clamping members with respect to said inner fulcrum member; d. a tapered member disposed within a space defined by and located between said clamping guide sections of said clamping members, said member having a tapered outer peripheral surface arranged such that when said tapered member is displaced to move said tapered outer peripheral surface into contact with inner surfaces of said clamping guide sections, said clamping guide sections are moved away from each other thereby forcing said clamping jaw sections to move toward each other by pivotal movement of said clamping members about said inner fulcrum member, the clamping force at said clamping jaw sections being increased as the displacement of said tapered member is increased.
Claim 3
Dependent Claim
37 words
A clamping device as defined in claim 1 wherein said inner surfaces of said clamping guide sections of the clamping members are tapered so as to mate with said tapered outer peripheral surface of said tapered members.
Claim 4
Dependent Claim
17 words
A clamping device as defined in claim 2 wherein said inner fulcrum member comprrises a ball-shaped member.
Claim 5
Dependent Claim
121 words
A clamping device as defined in claim 1 wherein each of said clamping guide sections has a first semi-annular ridge extending radially inwardly from an outer end of the clamping guide section and normally contacting the tapered outer peripheral surface of said tapered member, and a second semi-annular ridge extending radially inwardly from said outer end and spaced axially inwardly from said first ridge; and wherein said tapered member has an annular ridge extending radially outwardly from one end thereof for engagement with said second ridges of said clamping guide sections when said tapered member is displaced by a force in excess of a predetermined magnitude, whereby further displacement of said tapered member with respect to said guide sections is prevented.
Claim 6
Dependent Claim
17 words
A clamping device as defined in claim 4, wherein said inner fulcrum member comprises a ball-shaped member.
Claim 7
Dependent Claim
55 words
A clamping device as defined in claim 5, further comprising a device for displacing said tapered member device comprising a guide rod coupled at one end to said tapered member and fixed to a stop member at its other end, and a block having a relatively large mass and slidably fitted over said guide rod.
Claim 8
Dependent Claim
17 words
A clamping device as defined in claim 4, wherein said inner fulcrum member comprises a rod-shaped member.
Claim 9
Dependent Claim
55 words
A clamping device as defined in claim 7 further comprising a device for displacing said tapered member device comprising a guide rod coupled at one end to said tapered member and fixed to a stop member at its other end, and a block having a relatively large mass and slidably fitted over said guide rod.
Claim 10
Dependent Claim
17 words
A clamping device as defined in claim 1 wherein said inner fulcrum member comprises a rod-shaped member.
Claim 11
Dependent Claim
57 words
A clamping device as defined in claim 1 further comprising a device for displacing said tapered member comprising a guide rod coupled at one end to said tapered member through coupling means and fixed to a stop member at its other end, and a block having a relatively large mass and slidably fitted over said guide rod.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-05-11 | 1979-11-10 | 1980-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-11 | 1983-11-10 | 1984-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-11 | 1987-11-10 | 1988-05-11 | $7700.00 | Window Closed / Lapsed |