Patent US3752440A successfully refreshed from Google Patents.
US3752440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carpet stretcher pivot bridge
Assignee: Individual
•
Filing: 1971-12-23
•
Granted: 1973-08-14
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Expires: 1991-12-23
Abstract
Abstract A device to provide a strong, mobile, and properly aligned pivot point, from which to stretch carpet, with a carpet stretcher.
Inventors
- 👤 J Ream
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:04
CPC Classifications
A; A47; A47G; A47G27/00; A47G27/04; A47G27/0487; A47G27/0493
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
136 words
A carpet stretching machine including a stretcher gripper head adapted to engage a carpet, a pivot bridge, an axially extendable neck member interconnecting said gripper and said pivot bridge and a pair of longitudinally adjustable legs pivotably mounted in said pivot bridge for movement in a plane substantially parallel with the stretching force of said gripper head when engaged with a carpet, each of said legs being provided with feed adapted to brace against a wall or other generally vertical surface when in use wherein said pivot bridge is provided with means for mounting said legs for pivotal movement on opposite sides of said bridge from one another and said neck member is mounted to extend from between said legs outwardly in a direction generally away from the direction of extension for bracing of said legs.
Claim 2
Dependent Claim
136 words
A carpet stretching machine including a stretcher gripper head adapted to engage a carpet, a pivot bridge, an axially extendable neck member interconnecting said gripper and said pivot bridge and a pair of longitudinally adjustable legs pivotably mounted in said pivot bridge for movement in a plane substantially parallel with the stretching force of said gripper head when engaged with a carpet, each of said legs being provided with feed adapted to brace against a wall or other generally vertical surface when in use wherein said pivot bridge is provided with means for mounting said legs for pivotal movement on opposite sides of said bridge from one another and said neck member is mounted to extend from between said legs outwardly in a direction generally away from the direction of extension for bracing of said legs.
Claim 3
Dependent Claim
77 words
A carpet stretching machine as defined in claim 1 wherein said pivot bridge is formed by a pair of spaced parallel plates, said neck member and said legs are mounted between said plates, and a plurality of fastneing members extend between said plates to secure them together, said fastening members being positioned closest to the points of greatest stress in the plates of said pivot bridge without restricting the pivotal movement of said legs when in use.
Claim 4
Dependent Claim
34 words
A carpet stretching machine as defined in claim 2 wherein said neck member and said legs are mounted betweeN said plates by pins which include resiliently mounted button assemblies for quick insertion and release.
Claim 5
Dependent Claim
66 words
A carpet stretching machine as defined in claim 3 wherein said neck member is mounted to extend trhough the center portion of said pivot bridge, said legs each are mounted for pivotal movement on opposite sides of the mounted position of said neck member in the pivot bridge and said fastening members are securing bolts spaced apart generally near the peripheral edges of said pivot bridge.
Claim 6
Dependent Claim
40 words
A carpet stretching machine as defined in claim 4 wherein pairs of said securing bolts are located on the opposite sides of the centrally mounted portion of said neck near both the front and back edges of siad pivot bridge.
References Cited (Backward Citations)
US58831A
Cited
US3300182A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |