US3311319A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chalk line reel
Assignee: RK Campbell Enterprises Inc
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Filing: 1965-04-08
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Granted: 1967-03-28
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Expires: 1985-04-08
Abstract
No abstract record available.
Inventors
- 👤 Robert K Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:39
CPC Classifications
B; B44; B44D; B44D3/00; B44D3/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
IN A CHALK LINE REEL, THE COMBINATION OF: A LINE REELING SPOOL; A BOX CONFINING SAID SPOOL, PROVIDING BEARINGS THEREFOR AND CONFINING A BODY OF POWDERED CHALK, THERE BEING AN APERTURE IN SAID BOX THROUGH WHICH A LINE MAY BE PAYED OUT AS IT IS UNWOUND FROM SAID SPOOL; EXTERNAL CRANK MEANS FOR ROTATING SAID SPOOL TO WIND UP SAID LINE ON SAID SPOOL; MEANS FOR LOCKING SAID CRANK MEANS AGAINST ROTATION TO PREVENT SAID LINE BEING PAYED OUT; AND CLUTCH MEANS CONNECTING SAID CRANK MEANS TO SAID SPOOL AND OPTIONALLY OPERABLE WHILE SAID CRANK MEANS IS LOCKED AGAINST ROTATION TO TEMPORARILY DISCONNECT SAID SPOOL FROM SAID CRANK MEANS TO FREE SAID SPOOL FOR ROTATION FOR THE RAPID PAYING OUT OF SAID LINE, WITHOUT CAUSING SAID CRANK MEANS TO ROTATE.
Claim 2
Dependent Claim
130 words
IN A CHALK LINE REEL, THE COMBINATION OF: A LINE REELING SPOOL; A BOX CONFINING SAID SPOOL, PROVIDING BEARINGS THEREFOR AND CONFINING A BODY OF POWDERED CHALK, THERE BEING AN APERTURE IN SAID BOX THROUGH WHICH A LINE MAY BE PAYED OUT AS IT IS UNWOUND FROM SAID SPOOL; EXTERNAL CRANK MEANS FOR ROTATING SAID SPOOL TO WIND UP SAID LINE ON SAID SPOOL; MEANS FOR LOCKING SAID CRANK MEANS AGAINST ROTATION TO PREVENT SAID LINE BEING PAYED OUT; AND CLUTCH MEANS CONNECTING SAID CRANK MEANS TO SAID SPOOL AND OPTIONALLY OPERABLE WHILE SAID CRANK MEANS IS LOCKED AGAINST ROTATION TO TEMPORARILY DISCONNECT SAID SPOOL FROM SAID CRANK MEANS TO FREE SAID SPOOL FOR ROTATION FOR THE RAPID PAYING OUT OF SAID LINE, WITHOUT CAUSING SAID CRANK MEANS TO ROTATE.
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) | 1970-03-27 | 1970-09-26 | 1971-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-27 | 1974-09-26 | 1975-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-27 | 1978-09-26 | 1979-03-28 | $7700.00 | Window Closed / Lapsed |