US3583496A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compressed air-operated drive-in apparatus to drive-in fastening means such as nails, staples or the like
Assignee: Joh Friedrich Behrens AG
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Filing: 1969-08-18
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Granted: 1971-06-08
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Expires: 1989-08-18
Abstract
Abstract This device is an air operated driver for nails, staples and the like. It has an actuable member and an adjustable member. When the adjustable member is in one adjusted position, actuation of the actuable member causes repeated reciprocations of a working piston in a cylinder. With the adjustable member in another position, actuation of the actuable member causes biasing one cycle of operation. In other positions of the adjustable member, various delays in cycling result. The control means comprises a main valve body and a sleeve fixed to the apparatus housing, a servo valve carrying a main control valve, an auxiliary valve, and a release valve, all guided by the main valve body and sleeve, all having an axial alignment. The servo valve is a differential piston. The auxiliary valve is located between two biasing chambers effective in opposite senses to reciprocate the auxiliary valve between two positions.
Inventors
- 👤 Hellmuth Fehrs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:10
CPC Classifications
B; B25; B25C; B25C1/00; B25C1/04; B25C1/041; B25C1/043
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
302 words
Compressed air-operated drive-in apparatus to drive in fasteners such as nails, staples or the like, said apparatus comprising a housing, a working cylinder in the housing, a working piston guided in the cylinder for reciprocation relative thereto, and means to cause relative reciprocation between said piston and cylinder, said means comprising means to supply a compressed air bias to said housing, means to relieve said compressed air bias from the housing, a main control valve controlling the passage of said compressed air bias to said cylinder and allowing passage of compressed air bias to the working cylinder when said main control valve is open and shutting off communication between the compressed air bias and said cylinder and establishing communication between said cylinder and said compressed air relief means when said main control valve is closed, a servo control valve having means to move said main control valve, and being coaxial therewith, means to bias said servo valve with compressed air bias, a release valve, an auxiliary control valve disposed between said release valve and servo valve, means providing two biasing chambers on opposite sides of said auxiliary control valve, and effective in opposed senses with respect to said auxiliary control valve, means to actuate said release valve, means to cause one of said chambers to communicate with said compressed air bias when the release valve is actuated, and to communicate with the atmosphere when the release valve is not actuated, means to provide a control opening, conduit means connecting said control opening with said other chamber, and means controlled by said main control valve and said servo valve to cause said control opening to be in communication with said compressed air bias, with the main control valve open, and to be in communication with the atmosphere, with the main control valve closed.
Claim 2
Dependent Claim
302 words
Compressed air-operated drive-in apparatus to drive in fasteners such as nails, staples or the like, said apparatus comprising a housing, a working cylinder in the housing, a working piston guided in the cylinder for reciprocation relative thereto, and means to cause relative reciprocation between said piston and cylinder, said means comprising means to supply a compressed air bias to said housing, means to relieve said compressed air bias from the housing, a main control valve controlling the passage of said compressed air bias to said cylinder and allowing passage of compressed air bias to the working cylinder when said main control valve is open and shutting off communication between the compressed air bias and said cylinder and establishing communication between said cylinder and said compressed air relief means when said main control valve is closed, a servo control valve having means to move said main control valve, and being coaxial therewith, means to bias said servo valve with compressed air bias, a release valve, an auxiliary control valve disposed between said release valve and servo valve, means providing two biasing chambers on opposite sides of said auxiliary control valve, and effective in opposed senses with respect to said auxiliary control valve, means to actuate said release valve, means to cause one of said chambers to communicate with said compressed air bias when the release valve is actuated, and to communicate with the atmosphere when the release valve is not actuated, means to provide a control opening, conduit means connecting said control opening with said other chamber, and means controlled by said main control valve and said servo valve to cause said control opening to be in communication with said compressed air bias, with the main control valve open, and to be in communication with the atmosphere, with the main control valve closed.
Claim 3
Dependent Claim
14 words
The combination of claim 1, and a delaying chamber interposed in said conduit means.
Claim 4
Dependent Claim
15 words
The combination of claim 1, and adjustable means to throttle and block said conduit means.
Claim 5
Dependent Claim
15 words
The combination of claim 2, and adjustable means to throttle and block said conduit means.
Claim 6
Dependent Claim
38 words
The combination of claim 1, the communication of said control opening with the atmosphere, with said main control valve open, being via a channel which connects the working cylinder with the atmosphere, with the main control valve closed.
Claim 7
Dependent Claim
14 words
The combination of claim 5, and a delaying chamber interposed in said conduit means.
Claim 8
Dependent Claim
15 words
The combination of claim 6, and adjustable means to throttle and block said conduit means.
Claim 9
Dependent Claim
15 words
The combination of claim 5, and adjustable means to throttle and block said conduit means.
Claim 10
Dependent Claim
108 words
The combination of claim 1, said servo valve comprising a differential piston, means being provided to subject said piston to greater compressed air bias pressure in a direction to close said main control valve, than in an opposite direction, upon subjecting said servo valve to compressed air bias at both ends and closing said main control valve, and to subject said servo valve to compressed air bias only in said opposite direction at one end and opening the opposite end of said servo valve to the atmosphere, to thereby move said main control valve to open position, and said main control valve being fastened on said servo valve.
Claim 11
Dependent Claim
14 words
The combination of claim 9, and a delaying chamber interposed in said conduit means.
Claim 12
Dependent Claim
15 words
The combination of claim 9, and adjustable means to throttle and block said conduit means.
Claim 13
Dependent Claim
15 words
The combination of claim 10, and adjustable means to throttle and block said conduit means.
Claim 14
Dependent Claim
23 words
The combination of claim 1, said auxiliary control valve and said release valve being coaxial with said servo valve and main control valve.
Claim 15
Dependent Claim
34 words
The combination of claim 1, a main valve body, and a guiding sleeve coaxial with said body, fixed in said housing and serving as carriers for said servo valve and said auxiliary control valve.
Claim 16
Dependent Claim
25 words
The combination of claim 14, said servo valve, main control valve and auxiliary control valve being coaxial with said main valve body and guiding sleeve.
Claim 17
Dependent Claim
68 words
The combination of claim 1, and means dependent upon the adjustable means being in one position for causing said main control valve to open and close, repeatedly, upon actuating said release valve and keeping said release valve in actuated condition, and dependent upon said adjustable member being in another position, to open and close said main control valve once, upon actuatiNg said release valve and keeping it actuated.
Claim 18
Dependent Claim
21 words
The combination of claim 16, and dependent upon said adjustable member being in still another position to throttle said conduit means.
Claim 19
Dependent Claim
37 words
The combination of claim 17, said adjustable means having means for blocking said conduit means, in its position for causing said main control to open and close once upon actuating said release valve and keeping it actuated.
Claim 20
Dependent Claim
225 words
Compressed air-operated drive-in apparatus to drive in fasteners such as nails, staples or the like, said apparatus comprising a housing, a working cylinder in said housing, a working piston guided in said cylinder for reciprocation relative thereto, and means to cause relative reciprocation between said piston and cylinder, said means comprising means to supply a compressed air bias to said housing, means to relieve said compressed air bias from said housing, a main control valve controlling passage of compressed air bias to said cylinder and allowing passage of compressed air bias to said working cylinder when said main control valve is open and shutting off communication between the compressed air bias and said cylinder and establishing communication between said cylinder and said compressed air relief means, when said main control valve is closed, means to mount said member for movement relative to said housing, a single actuable member, an adjustable member, means to mount said adjustable member for movement relative to said housing, and means to cause said main control valve to open and close repeatedly upon actuating said actuable member and keeping it actuated, with said adjustable member in one adjusted position thereof, and to cause said main control valve to open and close once only upon actuating said actuable member and keeping it actuated, with said adjustable member in another adjusted position thereof.
Claim 21
Dependent Claim
225 words
Compressed air-operated drive-in apparatus to drive in fasteners such as nails, staples or the like, said apparatus comprising a housing, a working cylinder in said housing, a working piston guided in said cylinder for reciprocation relative thereto, and means to cause relative reciprocation between said piston and cylinder, said means comprising means to supply a compressed air bias to said housing, means to relieve said compressed air bias from said housing, a main control valve controlling passage of compressed air bias to said cylinder and allowing passage of compressed air bias to said working cylinder when said main control valve is open and shutting off communication between the compressed air bias and said cylinder and establishing communication between said cylinder and said compressed air relief means, when said main control valve is closed, means to mount said member for movement relative to said housing, a single actuable member, an adjustable member, means to mount said adjustable member for movement relative to said housing, and means to cause said main control valve to open and close repeatedly upon actuating said actuable member and keeping it actuated, with said adjustable member in one adjusted position thereof, and to cause said main control valve to open and close once only upon actuating said actuable member and keeping it actuated, with said adjustable member in another adjusted position thereof.
Claim 22
Dependent Claim
28 words
The combination of claim 19, and to vary the rate of opening and closing of said main control valve with said adjustable member in other adjusted positions thereof.
Claim 23
Dependent Claim
22 words
The combination of claim 14, and means on said guiding sleeve to limit movement of said main control valve in one direction.
Claim 24
Dependent Claim
23 words
The combination of claim 21, and means on said main valve body to limit movement of said auxiliary control valve in opposite directions.
Claim 25
Dependent Claim
22 words
The combination of claim 14, and means on said main valve body to limit movement of said release valve in opposite directions.
Claim 26
Dependent Claim
22 words
The combination of claim 21, and means on said housing to limit movement of said main control valve in an opposite direction.
Claim 27
Dependent Claim
217 words
An air-operated tool for driving in fasteners, said tool comprising a housing, a cylinder in said housing, a piston in said cylinder, said housing having a chamber for compressed air, said chamber having an opening communicating with said cylinder, a compressed air relief in the housing communicating with said cylinder, a tubular valve body fixed in said housing, a tubular servo control valve slidably mounted on the outside of said valve body, means on said servo control valve to close said opening, in one position thereof, and to open said opening in another position thereof, said valve body having an axial through hole in constant communication with said opening and chamber, a tubular auxiliary valve control slidably mounted inside said tubular valve body and having an axial hole communicating with said axial hole in said valve body, a release valve axially mounted in the lower end of said valve body and projecting into said axial hole of said auxiliary control valve, means to actuate said release valve, and means controlled by actuation of said release valve, to reciprocate said auxiliary control valve, and means controlled by said auxiliary control valve, to reciprocate said servo control valve, to open and close said opening, and to shut off and open communication between said compressed air relief and said cylinder.
Claim 28
Dependent Claim
217 words
An air-operated tool for driving in fasteners, said tool comprising a housing, a cylinder in said housing, a piston in said cylinder, said housing having a chamber for compressed air, said chamber having an opening communicating with said cylinder, a compressed air relief in the housing communicating with said cylinder, a tubular valve body fixed in said housing, a tubular servo control valve slidably mounted on the outside of said valve body, means on said servo control valve to close said opening, in one position thereof, and to open said opening in another position thereof, said valve body having an axial through hole in constant communication with said opening and chamber, a tubular auxiliary valve control slidably mounted inside said tubular valve body and having an axial hole communicating with said axial hole in said valve body, a release valve axially mounted in the lower end of said valve body and projecting into said axial hole of said auxiliary control valve, means to actuate said release valve, and means controlled by actuation of said release valve, to reciprocate said auxiliary control valve, and means controlled by said auxiliary control valve, to reciprocate said servo control valve, to open and close said opening, and to shut off and open communication between said compressed air relief and said cylinder.
Claim 29
Dependent Claim
63 words
The combination of claim 25, means adjustably mounted on said valve body means, and means dependent on the adjusted position of said adjustable member, to limit the reciprocation of said auxiliary control valve and servo valve to one cycle each upon actuating said release valve and keeping it closed, or to automatic repeating cycling upon actuating the release valve and keeping it actuated.
Claim 30
Dependent Claim
22 words
The combination of claim 26, and means also dependent on the position of said adjustable member to vary the rate of cycling.
Claim 31
Dependent Claim
92 words
The combination of claim 25, said auxiliary control valve forming, with said valve body, a release valve chamber at one end thereof, and a main valve chamber at its opposed end, and means to open said release valve chamber to the atmosphere, and to also open said main valve chamber to compressed air relief, when said release valve is unactuated, and to open one side of said servo valve to greater compressed air pressure than to the other side thereof, to maintain said servo control valve in position to close said opening.
Claim 32
Dependent Claim
102 words
The combination of claim 28, means to cause said release valve chamber to open to said compressed air chamber, and said main valve chamber to open to compressed air from said compressed air chamber, upon actuating said release valve and keeping it actuated, and also to cut off compressed air from said one side of said servo control valve, while continuing to subject the other side of said servo valve to compressed air, to move said servo control valve to open position, to allow compressed air to pass to said cylinder and to shut communication between said cylinder and compressed air relief.
Claim 33
Dependent Claim
43 words
The combination of claim 29, adjustable means, and means dependent on the position of said adjustable means, to automatically repeatedly cycle said servo control valve or to cycle said servo control valve once only, upon actuating said release valve and keeping it actuated.
Claim 34
Dependent Claim
122 words
The combination of claim 30, said means dependent on the position of said adjustable means, comprising a channel formed in the valve body and leading to the atmosphere, and means in one position of the auxiliary control member, to connect said one side of said servo control valve to said channel and to close said side of said servo control valve to compressed air, and in another position of said auxiliary control valve; to close said side of said servo control valve from said channel, and to open said side of said servo control valve to compressed air from said chamber, and said adjustable member in one position thereof uncovering said channel and in another position thereof covering and closing said channel.
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) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |