US4349397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and device for connecting pipe components made of weldable plastic
Assignee: Individual
•
Filing: 1979-04-23
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Granted: 1982-09-14
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Expires: 1999-04-23
Abstract
Abstract Pipe components, i.e., pipes, adapting members and fittings made of weldable plastic, are interconnected by electrically weldable joints. The welding process is made possible by a welding sleeve 3 being connected to the output 4 of the device. A switch-on monitor 11 permits the switching on of a switch stage 7 of the welding current circuit. The thermal energy is determined by square-law simulation of the welding or mains voltage in a pulse generator 9, which produces a pulse frequency which is dependent on this value and whose pulses are summed in a counter 10. Once a count value that corresponds to the thermal energy has been reached, the switch stage 7 is switched off. If the count value is not reached a function monitor 5 gives a warning signal.
Inventors
- 👤 Werner Sturm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:22
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/02; B29C65/34; B29C65/3404; B29C65/342; B29C65/3472; B29C65/3476; B29C66/00; B29C66/50; B29C66/51; B29C66/52; B29C66/522; B29C66/5229; B29C66/53; B29C66/534; B29C66/5344; B29C66/90; B29C66/91; B29C66/912; B29C66/9131; B29C66/91311; B29C66/91313; B29C66/914; B29C66/9161; B29C66/91651; B29C66/52298; B29C66/94; B29C66/949; B29C66/96; B29C66/961
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
71 words
A method for welding adjacent ends of piping comonents of weldable plastic by electrical resistance heating, comprising the steps of supplying a welding voltage to resistance heating wire of a welding sleeve; forming a multiple product of said welding voltage; converting said multiple product into a corresponding pulse frequency; counting pulses of said pulse frequency; and terminating said welding voltage to said heating wire once a predetermined pulse count is reached.
Claim 2
Independent Claim
71 words
A method for welding adjacent ends of piping comonents of weldable plastic by electrical resistance heating, comprising the steps of supplying a welding voltage to resistance heating wire of a welding sleeve; forming a multiple product of said welding voltage; converting said multiple product into a corresponding pulse frequency; counting pulses of said pulse frequency; and terminating said welding voltage to said heating wire once a predetermined pulse count is reached.
Claim 3
Dependent Claim
31 words
A method according to claim 1, wherein a warning signal is activated if said predetermined pulse count is not reached prior to interruption of suppling welding voltage to said heating wire.
Claim 4
Dependent Claim
42 words
A method according to claim 2, wherein said pulse frequency is formed by charging a capacitor through a resistor and discharging said capacitor through a switch stage upon reaching a charging voltage corresponding to a predetermined partial value of said welding voltage.
Claim 5
Dependent Claim
42 words
A method according to claim 1, wherein said pulse frequency is formed by charging a capacitor through a resistor and discharging said capacitor through a switch stage upon reaching a charging voltage corresponding to a predetermined partial value of said welding voltage.
Claim 6
Dependent Claim
19 words
A method according to claim 1, wherein said multiple product is a square law product of said welding voltage.
Claim 7
Independent Claim
94 words
A device for controlling welding cycles for welding adjacent ends of piping components of weldable plastic by electrical resistance heating, comprising means for coupling a resistance heating wire of a welding sleeve to a power supply through a switching means; multiplier means for forming a multiple product of voltage from the power supply; converter means for converting said multiple product into a corresponding pulse frequency; means for counting pulses of the pulse frequency; and means for opening said switch means to terminate voltage to the heating wire when a predetermined pulse count is reached.
Claim 8
Independent Claim
94 words
A device for controlling welding cycles for welding adjacent ends of piping components of weldable plastic by electrical resistance heating, comprising means for coupling a resistance heating wire of a welding sleeve to a power supply through a switching means; multiplier means for forming a multiple product of voltage from the power supply; converter means for converting said multiple product into a corresponding pulse frequency; means for counting pulses of the pulse frequency; and means for opening said switch means to terminate voltage to the heating wire when a predetermined pulse count is reached.
Claim 9
Dependent Claim
22 words
A device according to claim 6, further comprises means for monitoring supplying of voltage to the heating wire to sense interruptions therein.
Claim 10
Dependent Claim
31 words
A device according to claim 6, further comprises means for activating a warning signal if the predetermined pulse count is not reached prior to interruption of voltage to the heating wire.
Claim 11
Dependent Claim
18 words
A device accordingly to claim 6, wherein said multiplier means forms a square law product of the voltage.
Claim 12
Dependent Claim
45 words
A device according to claim 6, wherein said converter means comprises a capacitor charged through a resistor and means for discharging said capacitor through a switch stage upon reaching a charging voltage corresponding to a predetermined partial value of the voltage from the power supply.
Claim 13
Dependent Claim
22 words
A device according to claim 6, further comprises a welding sleeve of thermplastic material having a electrical resistance heating wire embedded therein.
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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) | 1985-09-13 | 1986-03-15 | 1986-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-13 | 1990-03-15 | 1990-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-13 | 1994-03-15 | 1994-09-14 | $7700.00 | Window Closed / Lapsed |