Patent US3869449A successfully refreshed from Google Patents.
US3665525A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatically extensible and retractable swimming pool cleaner with housing in bond beam
Assignee: Marine Swimming Pool Equipment Co
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Filing: 1971-01-11
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Granted: 1972-05-30
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Expires: 1991-01-11
Abstract
Abstract A pool cleaner of the type utilizing scouring jet hoses automatically extensible from tubular housings when subjected to pressurized water flow, and retractable in response to reversal from pressure to suction, wherein the housings are contained in the bond beam of the pool and connected to the pool by short radius bends, the rear ends of the hoses being pistons which are pivotally attached thereto so as to traverse said bends without binding therein.
Inventors
- 👤 Herbert H Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:19
CPC Classifications
E; E04; E04H; E04H4/00; E04H4/14; E04H4/16; E04H4/1618; E04H4/1636; E04H4/1645; E04H4/1681
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
155 words
In a swimming pool having a bond beam defining its rim and having means for circulating a pressure flow of water and for providing a suction source, in combination: a tubular housing including a body portion extending longitudinally of said bond beam and a bend connecting a forward end of said housing to the pool interior beneath its water level; a clearing hose normally housed in said housing; a piston pivotally coupled to the rear end of said hose and slidable in said housing in response to pressure differentials therein, so as to project and retract said hose in response to positive and negative differentials in said housing respectively, pivotal movement of said piston relative to said hose facilitating travel of the piston through said bend; said piston having a port through which water can flow from said housing through said hose to provide a cleaning jet in response to positive pressure in said housing.
Claim 2
Dependent Claim
155 words
In a swimming pool having a bond beam defining its rim and having means for circulating a pressure flow of water and for providing a suction source, in combination: a tubular housing including a body portion extending longitudinally of said bond beam and a bend connecting a forward end of said housing to the pool interior beneath its water level; a clearing hose normally housed in said housing; a piston pivotally coupled to the rear end of said hose and slidable in said housing in response to pressure differentials therein, so as to project and retract said hose in response to positive and negative differentials in said housing respectively, pivotal movement of said piston relative to said hose facilitating travel of the piston through said bend; said piston having a port through which water can flow from said housing through said hose to provide a cleaning jet in response to positive pressure in said housing.
Claim 3
Dependent Claim
48 words
The combination defined in claim 1; said piston having maximum diameter intermediate its ends, with a periphery fitted in said housing for response to pressure differentials, and tapering from said maximum diameter to minimum diameters at its respective ends, to facilitate travel of the piston through said bend.
Claim 4
Dependent Claim
26 words
The combination defined in claim 2; said piston having dual frusto-conical external surfaces intersecting at their major diameter to provide said periphery fitted in said housing.
Claim 5
Dependent Claim
42 words
The combination defined in claim 1; and a check valve in said piston operable to open for flow from the housing into the hose and to close to prevent reverse flow, whereby to amplify the negative dif-ferential for retraction of the hose.
Claim 6
Dependent Claim
77 words
The combination defined in claim 4; said check valve comprising a ball; a valve seat ring secured in the rear end of said piston, said ring defining said port and having a frusto-conical internal surface flaring forwardly to provide a valve seat for engagement by said valve ball; and circumferentially spaced abutment fingers in the forward end of the piston, operable to hold the ball in an open position permitting flow through the piston into the hose.
Claim 7
Dependent Claim
69 words
The combination defined in claim 1; said piston comprising an annular body having a front end opening defined by an internal collar providing an annular seat; a hose nipple secured in the rear end of said hose, extending through said opening and having at its rear end an annular head with a frusto-conical shoulder engaged against said seat to provide the pivotal coupling between said hose and said piston.
Claim 8
Dependent Claim
50 words
The combination defined in claim 6; said annular body being barrel shaped with a periphery of maximum diameter intermediate said ends, fitted in said housing to provide differential pressure response and tapering to minimum diameters at its ends to facilitate tilting within said housing for free travel through said bend.
Claim 9
Dependent Claim
60 words
The combination defined in claim 7, further including: a valve comprising a valve seat ring secured in the rear end of said annular body and providing a forwardly facing annular valve seat; and a ball caged between said valve seat and said nipple head and adapted to engage said seat to prevent rearward flow from said hose into said housing.
Claim 10
Dependent Claim
46 words
The combination defined in claim 8; said nipple head having circumferentially spaced abutment fingers for engagement by said ball to hold it in an open position permitting flow from said port between said fingers into said hose in response to positive pressure differential in said housing.
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) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |