US3523489A - Trapped air return system for fluid actuated fastener driving machines - Google Patents

Trapped air return system for fluid actuated fastener driving machines Download PDF

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Publication number
US3523489A
US3523489A US731364A US3523489DA US3523489A US 3523489 A US3523489 A US 3523489A US 731364 A US731364 A US 731364A US 3523489D A US3523489D A US 3523489DA US 3523489 A US3523489 A US 3523489A
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US
United States
Prior art keywords
piston
chamber
poppet
return
openings
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US731364A
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English (en)
Inventor
Garry R Perkins
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
VENICULUM INCORPORATED 1100 HICKS ROAD ROLLING MEADOWS IL A CORP OF
Original Assignee
Swingline Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Swingline Inc filed Critical Swingline Inc
Application granted granted Critical
Publication of US3523489A publication Critical patent/US3523489A/en
Assigned to BANKERS TRUST COMPANY, A NY BANKING CORPORATION reassignment BANKERS TRUST COMPANY, A NY BANKING CORPORATION SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: VENICULUM INCORPORATED
Assigned to VENICULUM INCORPORATED, 1100 HICKS ROAD, ROLLING MEADOWS, IL A CORP OF reassignment VENICULUM INCORPORATED, 1100 HICKS ROAD, ROLLING MEADOWS, IL A CORP OF ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: SWINGLINE INC.
Assigned to BANKERS TRUST COMPANY A NEW YORK BANKING CORP reassignment BANKERS TRUST COMPANY A NEW YORK BANKING CORP SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: VENICULUM INCORPORATED
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C1/00—Hand-held nailing tools; Nail feeding devices
    • B25C1/04—Hand-held nailing tools; Nail feeding devices operated by fluid pressure, e.g. by air pressure
    • B25C1/041—Hand-held nailing tools; Nail feeding devices operated by fluid pressure, e.g. by air pressure with fixed main cylinder

Definitions

  • a trigger is disposed within the trigger housing which can selectively block either the second conduit UNlTED STATES PATENTS or the exhaust conduit.
  • the poppet valve is provided with an $13,601 l/l894 Teal 91/416 opening which normally abuts the upper face of the piston. 2,983,922 5/1961 Juilts 92/85 Above the opening in the poppet is a seal which is normally 3,026,849 3/1962 Powers et al.. 91/469 spaced therefrom and a second exhaust conduit which is open 3,067,724 12/1962 Jenny et a1 9l/LAV to atmosphere.
  • a spring normally biases the poppet into it 3,170,487 2/1965 Juilts et a1 91/LAV normal position.
  • FIG. 6 is a fragmentary cross-sectional view taken along 'line's'6-6'ofFIG. 5. 1
  • Lower face 30 of poppet valve 29 has a smaller operational area. than upper face 33 thereof.
  • the volume of return chamber 42 should be the same as that of drive chamber 40.
  • the size of the openings 39 in the piston must bear some relationship to the operational area of the piston itself. Obviously if the openings are too small the device will not properly return since return chamber 42 will not be filled with pressure air. Conversely if the openings are too large the device will not properly operate since the pressure air, instead of driving the-- piston, will bleed through the openings into the return chamber and the piston will likewise not properly return because the pressure air will bleed out of the openings within varied there is acertain ratio which wfll not operate.
  • the piston has a diameter of two and five eighth (2-5/8) inches and each of the holes within the piston have a diameter of three thirty-seconds (3/32) of an inch. I believe that if the total diameter of the openings within the piston are more than twenty-five (25%) percent of the operational area of the piston satisfactory operation will not be obtained. Furthermore if the total area of the openings within the piston is less than five (5%) percent of the total operational area of the piston I also believe that satisfactory operation will not be obtained.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)
US731364A 1968-05-17 1968-05-17 Trapped air return system for fluid actuated fastener driving machines Expired - Lifetime US3523489A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US73136468A 1968-05-17 1968-05-17

Publications (1)

Publication Number Publication Date
US3523489A true US3523489A (en) 1970-08-11

Family

ID=24939188

Family Applications (1)

Application Number Title Priority Date Filing Date
US731364A Expired - Lifetime US3523489A (en) 1968-05-17 1968-05-17 Trapped air return system for fluid actuated fastener driving machines

Country Status (4)

Country Link
US (1) US3523489A (fr)
JP (1) JPS4945543B1 (fr)
FR (1) FR2008774A1 (fr)
GB (1) GB1239624A (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3776445A (en) * 1972-08-24 1973-12-04 Omark Industries Inc Pneumatic fastener driving device
US3858780A (en) * 1973-01-08 1975-01-07 Spotnails Fastener-driving tool
US3905535A (en) * 1973-09-13 1975-09-16 Duo Fast Corp Fastener driving tool
DE2451999A1 (de) * 1974-11-02 1976-05-06 Messerschmitt Boelkow Blohm Druckmittelbetriebener stellmotor
US4507919A (en) * 1980-02-11 1985-04-02 Smith Russell G Fail safe actuator
GB2166196A (en) * 1984-10-26 1986-04-30 Peter Rebbettes Fluid operated actuator
US20050040205A1 (en) * 2003-08-22 2005-02-24 Haytayan Harry M. Buffered poppet valve member for pneumatic fastening tool
US10888983B2 (en) 2013-10-11 2021-01-12 Illinois Tool Works Inc. Powered nailer with positive piston return

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3776445A (en) * 1972-08-24 1973-12-04 Omark Industries Inc Pneumatic fastener driving device
US3858780A (en) * 1973-01-08 1975-01-07 Spotnails Fastener-driving tool
US3905535A (en) * 1973-09-13 1975-09-16 Duo Fast Corp Fastener driving tool
DE2451999A1 (de) * 1974-11-02 1976-05-06 Messerschmitt Boelkow Blohm Druckmittelbetriebener stellmotor
US4507919A (en) * 1980-02-11 1985-04-02 Smith Russell G Fail safe actuator
GB2166196A (en) * 1984-10-26 1986-04-30 Peter Rebbettes Fluid operated actuator
US20050040205A1 (en) * 2003-08-22 2005-02-24 Haytayan Harry M. Buffered poppet valve member for pneumatic fastening tool
US10888983B2 (en) 2013-10-11 2021-01-12 Illinois Tool Works Inc. Powered nailer with positive piston return
EP3055106B1 (fr) * 2013-10-11 2022-08-03 Illinois Tool Works Inc. Cloueuse motorisée ayant un retour de piston positif
US11707827B2 (en) 2013-10-11 2023-07-25 Illinois Tool Works Inc. Powered nailer with positive piston return

Also Published As

Publication number Publication date
JPS4945543B1 (fr) 1974-12-04
FR2008774A1 (fr) 1970-01-23
GB1239624A (fr) 1971-07-21
DE1924957A1 (de) 1969-11-27

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Legal Events

Date Code Title Description
AS Assignment

Owner name: BANKERS TRUST COMPANY, A NY BANKING CORPORATION

Free format text: SECURITY INTEREST;ASSIGNOR:VENICULUM INCORPORATED;REEL/FRAME:004172/0159

Effective date: 19830819

AS Assignment

Owner name: VENICULUM INCORPORATED, 1100 HICKS ROAD, ROLLING M

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:SWINGLINE INC.;REEL/FRAME:004196/0645

Effective date: 19830819

AS Assignment

Owner name: BANKERS TRUST COMPANY A NEW YORK BANKING CORP

Free format text: SECURITY INTEREST;ASSIGNOR:VENICULUM INCORPORATED;REEL/FRAME:004404/0886

Effective date: 19830819