US3903552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective device for a basin
Assignee: POOL GUARD Inc AB
•
Filing: 1973-07-25
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Granted: 1975-09-09
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Expires: 1993-07-25
Abstract
Abstract The present invention relates to a protective device for basins or the like preferably having a quadratic or rectangular shape.
Inventors
- 👤 Leif Urban Erlandsson
- 👤 Lennart Roland Alsenhag
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:00
CPC Classifications
E; E04; E04H; E04H4/00; E04H4/06; E04H4/10
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
108 words
A protective device for basins preferably having a quardratic or rectangular shape, comprising profiled parallel rails, tow rails extending laterally of said profiled rails, runners carried by said tow rails and running in said profiled rails, a flexible cover connected to said tow rails, tubes being mounted substantially parallel to said profiled rails, pistons slideably mounted in said tubes, ropes, each having two strands, each connected to an opposite end of one of said pistons and connected to one of said tow rails at one end of said cover, and means for moving said pistons in opposite directions to the movement of said one of said tow rails.
Claim 2
Dependent Claim
108 words
A protective device for basins preferably having a quardratic or rectangular shape, comprising profiled parallel rails, tow rails extending laterally of said profiled rails, runners carried by said tow rails and running in said profiled rails, a flexible cover connected to said tow rails, tubes being mounted substantially parallel to said profiled rails, pistons slideably mounted in said tubes, ropes, each having two strands, each connected to an opposite end of one of said pistons and connected to one of said tow rails at one end of said cover, and means for moving said pistons in opposite directions to the movement of said one of said tow rails.
Claim 3
Dependent Claim
21 words
A protective device as claimed in claim 1 including pulleys having said strands running therearound and positioned for guiding said strands.
Claim 4
Dependent Claim
50 words
A protective device as claimed in claim 1 including pipe sockets connected at each end of said tubes and having gable portions with said strands extending therethrough and said moving means being means for supplying pressurized media to the sockets at the same ends of said tubes at a time.
Claim 5
Dependent Claim
45 words
A protective device as claimed in claim 3 including a valve in said moving means and a handle detachably connected to said valve for operating the same to supply said pressurized media to the sockets at the same ends of said tubes at a time.
Claim 6
Dependent Claim
21 words
A protective device as claimed in claim 1 including automatically operating means for releasably locking said cover in an extended position.
Claim 7
Dependent Claim
45 words
A protective device as claimed in claim 5 wherein said locking means includes, catches slideably mounted through said tubes, each of said pistons having a groove and springs biassing said catches inwardly of said tubes whereby said catches can at times engage said piston grooves.
Claim 8
Dependent Claim
46 words
A protective device as claimed in claim 6 wherein said catches are each of a piston configuration with the piston groove engaging end thereof exposed to the pressurized media in its tube for at times being moved by said media automatically from its corresponding piston groove.
Claim 9
Dependent Claim
42 words
A protective device as claimed in claim 7 including a shackle attached to said one of said tow rails and a fixedly mounted locking means positioned for at times receiving and detachably retaining said shackle with said cover in its extended position.
Claim 10
Dependent Claim
40 words
A protective device as claimed in claim 8 wherein said locking means includes a slideably mounted piston having a locking element positioned for at times detachably retaining said shackle, and a spring biassing said piston for rotatably and longitudinal movement.
Claim 11
Dependent Claim
33 words
A protective device as claimed in claim 9 wherein said locking element has an oblique surface positioned for sliding over said shackle to automatically retain said shackle at times in the locking position.
Claim 12
Dependent Claim
38 words
A protective device as claimed in claim 10 wherein a handle is detachably connected to said locking piston whereby said handle and thus said locking element can at times be rotated relative to said shackle and released therefrom.
Claim 13
Dependent Claim
19 words
A protective device as claimed in claim 9 wherein said spring consists of a combined compression and torsion spring.
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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) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |