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Patent US3861476A successfully refreshed from Google Patents.
US3861476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control valve for fluid operated tool
Assignee: Gardner Denver Inc
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Filing: 1973-08-06
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Granted: 1975-01-21
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Expires: 1993-08-06
Abstract
Abstract A flow control valve for a fluid operated power tool including a valve closure member fitted in a transverse bore in the tool handle portion and being normally locked against movement to the open position by a digitally actuated rodlike plunger. The plunger includes a push button disposed on the opposite side of the tool handle portion from a valve operating lever. The plunger also includes a grooved portion which is registerable with a plurality of ball members held captive in a stem surrounding the plunger and which are movable into the grooved portion of the plunger to permit movement of the closure member to an open position only upon actuation of the plunger itself.
Inventors
- 👤 Alvin H Borsum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:43
CPC Classifications
F; F16; F16K; F16K35/00; F16K35/02; F16K35/022; F16K35/025; B; B23; B23B; B23B45/00; B23B45/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
173 words
In a fluid operated tool: a housing; a fluid operated motor disposed in said housing; a passage in said housing for conducting pressure fluid to said motor; a fluid flow control valve interposed in said passage including a closure member movable between open and closed positions, a valve operating member for manually actuating said closure member to the open position and biasing means for urging said closure member to the closed position; and, locking means cooperable with said closure member for preventing the movement of said closure member to said open position, said locking means including a movable rod actuatable at will for unlocking said closure member for movement to the open position in response to the actuation of said operating member, and means engageable with said rod and releasably engageable with said closure member for locking said closure member in a closed position when said rod is in a first position, said means being operable in response to the movement of said rod to a second position to unlock said closure member.
Claim 2
Dependent Claim
173 words
In a fluid operated tool: a housing; a fluid operated motor disposed in said housing; a passage in said housing for conducting pressure fluid to said motor; a fluid flow control valve interposed in said passage including a closure member movable between open and closed positions, a valve operating member for manually actuating said closure member to the open position and biasing means for urging said closure member to the closed position; and, locking means cooperable with said closure member for preventing the movement of said closure member to said open position, said locking means including a movable rod actuatable at will for unlocking said closure member for movement to the open position in response to the actuation of said operating member, and means engageable with said rod and releasably engageable with said closure member for locking said closure member in a closed position when said rod is in a first position, said means being operable in response to the movement of said rod to a second position to unlock said closure member.
Claim 3
Dependent Claim
66 words
The invention set forth in claim 1 wherein: said housing includes a handle having said passage disposed therein and a bore intersecting said passage, said closure member is movably disposed in said bore between valve open and closed positions, and said locking means includes a plug disposed in one end of said bore and supporting said rod for actuation at will to unlock said closure member.
Claim 4
Dependent Claim
58 words
The invention set forth in claim 2 wherein: said means comprises ball means disposed in opening means in said plug and engageable with said closure member, and said rod includes a groove registerable with said opening means in response to movement of said rod to said second position for receiving said ball means to unlock said closure member.
Claim 5
Dependent Claim
50 words
The invention set forth in claim 2 wherein: said plug includes a recess formed by an axially projecting skirt portion of said plug and said rod includes an operatinG button disposed in said recess and actuatable at will for moving said rod from said first position to said second position.
Claim 6
Dependent Claim
25 words
The invention set forth in claim 4 wherein: said operating member and said button are opposed to each other on opposite sides of said handle.
Claim 7
Dependent Claim
161 words
In a fluid operated tool: a housing; a fluid operated motor disposed in said housing; a passage in said housing for conducting pressure fluid to said motor; a fluid flow control valve interposed in said passage including a closure member movable between open and closed positions and a valve operating member for manually actuating said closure member to the open position; and, locking means cooperable with said closure member for preventing the movement of said closure member to said open position, said locking means including a member actuatable at will for unlocking said closure member for movement to the open position in response to the actuation of said operating member, and means engageable with said member and releasably engageable with said closure member for locking said closure member in a closed position when said member is in a first position, said means being operable in response to the movement of said member to a second position to unlock said closure member.
Claim 8
Dependent Claim
161 words
In a fluid operated tool: a housing; a fluid operated motor disposed in said housing; a passage in said housing for conducting pressure fluid to said motor; a fluid flow control valve interposed in said passage including a closure member movable between open and closed positions and a valve operating member for manually actuating said closure member to the open position; and, locking means cooperable with said closure member for preventing the movement of said closure member to said open position, said locking means including a member actuatable at will for unlocking said closure member for movement to the open position in response to the actuation of said operating member, and means engageable with said member and releasably engageable with said closure member for locking said closure member in a closed position when said member is in a first position, said means being operable in response to the movement of said member to a second position to unlock said closure member.
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) | 1978-01-20 | 1978-07-22 | 1979-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-20 | 1982-07-22 | 1983-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-20 | 1986-07-22 | 1987-01-21 | $7700.00 | Window Closed / Lapsed |